Interim report
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4 November 2026 This report contains 1 pages of “Independent Auditor’s Report” and 4 2 pages of financial statements and explanatory notes. Türk Telekomünikasyon Anonim Şirketi and Its Subsidiaries 30 September 2026 Interim Condensed Consolidated Financial Statements As At and For The Nine Months Period Ended 30 September 2026
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(Convenience translation of a report and financial statements originally issued in Turkish) TÜRK TELEKOMÜNİKASYON ANONİM ŞİRKETİ AND ITS SUBSIDIARIES INTERIM CONDENSED CONSOLIDATED STATEMENT AS AT AND FOR THE NINE MONTHS PERIOD ENDED 30 SEPTEMBER 2026 (All amounts disclosed in the consolidated financial statements and notes have been expressed in thousand currency units and are expressed in terms of purchasing power of Turkish Lira as of 30 September 2026 unless otherwise stated.) Table of contents Page Interim Condensed Consolidated statement of financial position 1-3 Interim Condensed Consolidated statement of profit or loss 4 Interim Condensed Consolidated statement of other comprehensive income 5 Interim Condensed Consolidated statement of changes in equity 6 Interim Condensed Consolidated statement of cash flows 7-8 Note 1 Reporting entity 9-11 Note 2 Basis of presentation of financial statements 11-17 Note 3 Seasonal changes in the operations 18 Note 4 Earnings per share 18 Note 5 Segment reporting 18 - 20 Note 6 Cash and cash equivalents 21 Note 7 Financial liabilities 22 - 25 Note 8 Due from and due to related parties 26 - 28 Note 9 Trade receivables from and payables to third parties 28 - 29 Note 10 Other payables 29-30 Note 11 Tangible and Intangible Assets 30 Note 12 Provisions 31 Note 13 Commitments and contingencies 32 – 33 Note 14 Financial risk management objectives and policies 34 - 38 Note 15 Derivative financial instruments 38 - 39 Note 16 Financial investments 39 Note 17 Supplementary cash flow information 40 Note 18 Tax assets and liabilities 40 Note 19 Explanations regarding net monetary positions gains / (losses) 41 Note 20 Revenue 42 Note 21 Expense by nature 42 Note 22 Subsequent events 42
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(Convenience translation of a report and financial statements originally issued in Turkish) TÜRK TELEKOMÜNİKASYON ANONİM ŞİRKETİ AND ITS SUBSIDIARIES INTERIM CONDENSED CONSOLIDATED STATEMENT OF FINANCIAL POSITION AS AT 30 SEPTEMBER 2026 (All amounts disclosed in the consolidated financial statements and notes have been expressed in thousand currency units and are expressed in terms of purchasing power of Turkish Lira as of 30 September 2026 unless otherwise stated.) The accompanying notes form an integral part of these consolidated financial statements. 1 Current period Prior period Unaudited Audited Notes 30 September 2026 31 December 2025 Assets Total current assets 119.350.105 143.155.697 Cash and cash equivalents 6 30.417.553 83.220.095 Financial investments 16 10.202 − Trade receivables - Trade receivables due from related parties 8 1.280.555 1.359.344 - Trade receivables due from unrelated parties 9 44.982.017 38.726.969 Receivables from finance sector activities - Receivables from finance sector activities due from unrelated parties 713.919 490.272 Other receivables - Other receivables due from unrelated parties 466.202 290.756 Contract assets - Contract assets from sale of goods and service contracts 9 10.750.097 9.346.050 Derivative financial assets - Derivative financial assets held for trading 15 482.008 13.768 - Derivative financial assets held for hedging 15 − 495.918 Inventories 3.330.952 2.278.201 Prepayments - Prepayments to unrelated parties 4.307.377 2.427.948 Current tax assets 190.887 137.890 Other current assets - Other current assets due from unrelated parties 21.340.839 3.290.989 Subtotal 118.272.608 142.078.200 Non-current assets classified as held for sale 1.077.497 1.077.497 Total non-current assets 576.369.258 387.254.965 Financial investments - Financial investments 16 1.075.736 1.041.940 Trade receivables - Trade receivables due from unrelated parties 9 221.515 338.004 Receivables from finance sector activities - Receivables from finance sector activities due from unrelated parties 864.251 584.851 Other receivables - Other receivables due from unrelated parties 140.787 69.388 Contract assets - Contract assets from sale of goods and service contracts 9 28.259 90.692 Right of use assets 13.402.412 13.714.400 Investment property 231.610 234.251 Tangible assets - Land and premises 59.647.132 60.067.742 - Buildings 8.081.084 8.256.339 - Machinery and equipments 117.501.289 111.334.329 - Other tangible assets 43.072.313 25.693.140 Intangible assets - Goodwill 1.143.161 1.143.161 - Rights regarding concession agreements 196.342.209 77.355.530 - Concession agreements assets 1.013.910 7.093.647 - Licences 69.771.685 19.294.034 - Other intangible assets 55.450.979 59.085.702 Prepayments - Prepayments to unrelated parties 6.361.860 387.375 Deferred tax asset 18 2.019.066 1.470.320 Other non-current assets - Other non-current assets due from unrelated parties − 120 Total assets 695.719.363 530.410.662
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(Convenience translation of a report and financial statements originally issued in Turkish) TÜRK TELEKOMÜNİKASYON ANONİM ŞİRKETİ AND ITS SUBSIDIARIES INTERIM CONDENSED CONSOLIDATED STATEMENT OF FINANCIAL POSITION AS AT 30 SEPTEMBER 2026 (All amounts disclosed in the consolidated financial statements and notes have been expressed in thousand currency units and are expressed in terms of purchasing power of Turkish Lira as of 30 September 2026 unless otherwise stated.) The accompanying notes form an integral part of these consolidated financial statements. 2 Current period Prior period Unaudited Audited Notes 30 September 2026 31 December 2025 Liabilities Total current liabilities 154.835.232 94.411.470 Short term financial liabilities Short term financial liabilities from related parties - Bank loans 7,8 431.250 149.367 Short term financial liabilities from unrelated parties - Bank loans 7 3.607.371 3.228.964 - Lease liabilities 7 183.870 45.868 Current portion of long-term financial liabilities Current portion of long-term financial liabilities from unrelated parties - Bank loans 7 13.640.836 16.166.775 - Lease liabilities 7 2.599.323 3.249.084 - Issued debt instruments 7 2.505.761 1.167.459 Trade payables - Trade payables to related parties 8 1.080.962 551.590 - Trade payables to unrelated parties 9 40.768.517 38.353.251 Payables from finance sector activities - Payables from finance sector activities due to unrelated parties 1.288.957 758.479 Employee benefit obligations 2.825.739 2.536.201 Other payables - Other payables to unrelated parties 10 71.849.863 11.391.669 Derivative financial liabilities - Derivative financial liabilities held for trading 15 1.340.414 2.586.395 - Derivative financial liabilities held for hedging 15 14.563 − Contract liabilities - Contract liabilities from sale of goods and service contracts 4.319.056 3.821.396 Current tax liabilities 18 2.217.064 4.205.520 Current provisions - Current provisions for employee benefits 12 2.900.052 4.303.757 - Other current provisions 12 507.992 696.778 Other current liabilities - Other current liabilities to unrelated parties 2.753.642 1.198.917 Total non-current liabilities 253.876.104 171.903.024 Long term financial liabilities Long term financial liabilities from unrelated parties - Bank loans 7 44.743.618 37.606.091 - Lease liabilities 7 3.082.822 3.492.173 - Issued debt instruments 7 82.908.827 90.253.047 Other payables - Other payables to unrelated parties 10 73.319.598 1.488.089 Contract liabilities - Contract liabilities from sale of goods and service contracts 4.196.521 5.100.478 Non-current provisions - Non-current provisions for employee benefits 12 12.450.112 12.059.760 - Other non-current provisions 10.627 13.211 Deferred tax liabilities 18 33.163.979 21.890.175 Total liabilities 408.711.336 266.314.494
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(Convenience translation of a report and financial statements originally issued in Turkish) TÜRK TELEKOMÜNİKASYON ANONİM ŞİRKETİ AND ITS SUBSIDIARIES INTERIM CONDENSED CONSOLIDATED STATEMENT OF FINANCIAL POSITION AS AT 30 SEPTEMBER 2026 (All amounts disclosed in the consolidated financial statements and notes have been expressed in thousand currency units and are expressed in terms of purchasing power of Turkish Lira as of 30 September 2026 unless otherwise stated.) The accompanying notes form an integral part of these consolidated financial statements. 3 Current period Prior period Unaudited Audited Notes 30 September 2026 31 December 2025 Equity 287.008.027 264.096.168 Equity attributable to equity holders of the parent Issued capital 3.500.000 3.500.000 Inflation adjustments on capital 121.582.596 121.582.596 Repurchased shares (-) (99.465) (34.284) Other accumulated comprehensive income / (loss) that will not be reclassified in profit or loss (Losses) / gains on revaluation and remeasurement - Losses on remeasurements of defined benefit plans (10.108.017) (9.311.521) - Increases on revaluation of property, plant and equipment 11.648.055 11.734.081 Other accumulated comprehensive income / (loss) that will be reclassified in profit or loss Gains / (losses) on hedges - Gains / (losses) on cash flow hedges 40.210 (18.170) - Losses on hedges of net investment in foreign operations (16.824.106) (16.198.163) Change in value of time value of options (25.966) 49.191 Exchange differences on translation 3.709.965 5.055.896 Restricted reserves appropriated from profits 7.475.438 7.540.619 Retained earnings 140.323.899 111.627.135 Profit for the year 25.785.418 28.568.788 Total liabilities and equity 695.719.363 530.410.662
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(Convenience translation of a report and financial statements originally issued in Turkish) TÜRK TELEKOMÜNİKASYON ANONİM ŞİRKETİ AND ITS SUBSIDIARIES INTERIM CONDENSED CONSOLIDATED STATEMENT OF PROFIT OR LOSS FOR THE NINE MONTHS PERIOD ENDED 30 SEPTEMBER 2026 (All amounts disclosed in the consolidated financial statements and notes have been expressed in thousand currency units and are expressed in terms of purchasing power of Turkish Lira as of 3 0 September 2026 unless otherwise stated.) The accompanying notes form an integral part of these consolidated financial statements. 4 Current Period Current Period Prior Period Prior Period Unaudited Unaudited Unaudited Unaudited Notes 1 January - 30 September 2026 1 July - 30 September 2026 1 January - 30 September 2025 1 July - 30 September 2025 Revenue 5,20 236.510.418 86.378.738 214.959.026 77.219.045 Cost of sales (-) (142.312.091) (52.829.162) (123.334.016) (42.625.623) Gross profit 94.198.327 33.549.576 91.625.010 34.593.422 General administrative expenses (-) (24.227.984) (6.478.588) (23.088.824) (7.415.614) Marketing, sales and distribution expenses (-) (21.839.904) (7.448.255) (18.131.505) (5.935.348) Research and development expenses (-) (2.790.748) (800.632) (2.739.973) (853.770) Other operating income 3.488.410 127.965 3.027.240 599.793 Other operating expense (-) (4.672.035) (929.931) (5.830.474) (1.350.037) Operating profit 44.156.066 18.020.135 44.861.474 19.638.446 Impairment on losses and reversal of impairment losses determined in accordance with IFRS 9, net (1.007.997) (376.731) (967.651) (341.494) Investment activity income 1.077.254 118.927 1.644.528 176.210 Investment activity expenses (-) (42.423) (7.511) (40.939) (25.162) Operating profit before financing expenses 44.182.900 17.754.820 45.497.412 19.448.000 Finance income 10.643.782 3.418.659 8.254.450 2.446.183 Finance costs (-) (60.306.401) (23.626.164) (32.067.507) (9.121.805) Monetary gains 19 46.847.062 13.989.989 19.103.631 5.096.188 Profit before tax from continuing operations 5 41.367.343 11.537.304 40.787.986 17.868.566 Tax expense from continuing operations - Current period tax expense (4.518.291) (799.597) (6.931.541) (3.281.918) - Deferred tax expense (11.063.634) (3.059.549) (6.181.291) (1.298.680) Profit for the period 25.785.418 7.678.158 27.675.154 13.287.968 Earnings per shares attributable to equity holders of the parent from (in full kuruş) 4 7,3686 2,1943 7,9083 3,7971 Earnings per diluted shares attributable to equity holders of the parent from (in full kuruş) 4 7,3686 2,1943 7,9083 3,7971
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(Convenience translation of a report and financial statements originally issued in Turkish) TÜRK TELEKOMÜNİKASYON ANONİM ŞİRKETİ AND ITS SUBSIDIARIES INTERIM CONDENSED CONSOLIDATED STATEMENT OF OTHER COMPREHENSIVE INCOME FOR THE NINE MONTHS PERIOD ENDED 30 SEPTEMBER 2026 (All amounts disclosed in the consolidated financial statements and notes have been expressed in thousand currency units and are expressed in terms of purchasing power of Turkish Lira as of 30 September 2026 unless otherwise stated.) The accompanying notes form an integral part of these consolidated financial statements. 5 Current Period Current Period Prior Period Prior Period Unaudited Unaudited Unaudited Unaudited Notes 1 January - 30 September 2026 1 July - 30 September 2026 1 January - 30 September 2025 1 July - 30 September 2025 Profit for the period 25.785.418 7.678.158 27.675.154 13.287.968 Other comprehensive income / (loss): Other comprehensive income that will not be reclassified to profit or loss (882.522) 126.248 (669.846) (134.293) Losses from revaluation of property, plant and equipment (105.878) − − − Gains / (losses) on remeasurements of defined benefit plans (1.061.995) 168.331 (893.128) (179.058) Tax effect of other comprehensive income items not to be reclassified to profit or loss -Taxes relating to revaluation of property, plant and equipment 19.852 − − − -Taxes relating to remeasurements of defined benefit plans 265.499 (42.083) 223.282 44.765 Other comprehensive income that will be reclassified to profit or loss (1.925.856) (756.533) (1.776.051) (663.568) Exchange differences on translation (1.345.931) (480.045) 74.559 (369.742) Gains / (losses) on cash flow hedges 107.478 34.723 (19.647) (40.495) Losses on hedges of net investments in foreign operations (834.590) (377.304) (2.582.151) (428.899) Gains / (losses) on change in value of time value of options (46.121) (26.070) 134.318 77.626 Tax effect on other comprehensive income items to be reclassified to profit or loss -Taxes relating to gains / (loss) cash flow hedges (26.869) (8.681) 4.912 10.124 -Taxes relating to gains on hedges of net investments in foreign operations 208.647 94.326 645.538 107.225 -Taxes relating to change in value of time value of options of other comprehensive gains / (loss) 11.530 6.518 (33.580) (19.407) Other comprehensive loss (2.808.378) (630.285) (2.445.897) (797.861) Total comprehensive income 22.977.040 7.047.873 25.229.257 12.490.107
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(Convenience translation of a report and financial statements originally issued in Turkish) TÜRK TELEKOMÜNİKASYON ANONİM ŞİRKETİ AND ITS SUBSIDIARIES INTERIM CONDENSED CONSOLIDATED STATEMENT OF CHANGES IN EQUITY FOR THE NINE MONTHS PERIOD ENDED 30 SEPTEMBER 2026 (All amounts disclosed in the consolidated financial statements and notes have been expressed in thousand currency units and are expressed in terms of purchasing power of Turkish Lira as of 30 September 2026 unless otherwise stated.) The accompanying notes form an integral part of these consolidated financial statements. 6 Other accumulated comprehensive income / (loss) that will not be reclassified in profit or loss Other accumulated comprehensive income / (loss) that will be reclassified in profit or loss Retained earnings / (losses) Gains / (losses) on revaluation and remeasurement Gains / (losses) on hedge Issued capital Inflation adjustments on capital Repurchased shares (-) Increases on revaluation of property, plant and equipment Losses on remeasurements of defined benefit plans Gains / (losses) on hedges of net investment in foreign operations Gains / (losses) on cash flow hedges Change in value of time value of options Exchange differences on translation Restricted reserves appropriated from profits Retained earnings Profit for the period Total equity Balance at 1 January 2025 3.500.000 121.582.596 (34.284) 11.698.396 (8.845.067) (14.045.027) 778.980 (353.777) 4.795.752 6.861.677 98.023.697 13.759.998 237.722.941 Transfers − − − − − − − − − − 13.759.998 (13.759.998) − Total comprehensive income − − − − (669.846) (1.936.613) (14.735) 100.738 74.559 − − 27.675.154 25.229.257 Profit for period − − − − − − − − − − − 27.675.154 27.675.154 Other comprehensive loss − − − − (669.846) (1.936.613) (14.735) 100.738 74.559 − − − (2.445.897) Increase / (decrease) due to other changes (*) − − − − − − (609.226) 73.821 − − 535.405 − − Balance at 30 September 2025 3.500.000 121.582.596 (34.284) 11.698.396 (9.514.913) (15.981.640) 155.019 (179.218) 4.870.311 6.861.677 112.319.100 27.675.154 262.952.198 Balance at 1 January 2026 3.500.000 121.582.596 (34.284) 11.734.081 (9.311.521) (16.198.163) (18.170) 49.191 5.055.896 7.540.619 111.627.135 28.568.788 264.096.168 Transfers − − − − − − − − − − 28.568.788 (28.568.788) − Total comprehensive income − − − (86.026) (796.496) (625.943) 80.609 (34.591) (1.345.931) − − 25.785.418 22.977.040 Profit for period − − − − − − − − − − − 25.785.418 25.785.418 Other comprehensive loss − − − (86.026) (796.496) (625.943) 80.609 (34.591) (1.345.931) − − − (2.808.378) Increase / (decrease) due to other changes (*) − − − − − − (22.229) (40.566) − − 62.795 − − Increase / (decrease) due to share Repurchased transactions (**) − − (65.181) − − − − − − (65.181) 65.181 − (65.181) Balance at 30 September 2026 3.500.000 121.582.596 (99.465) 11.648.055 (10.108.017) (16.824.106) 40.210 (25.966) 3.709.965 7.475.438 140.323.899 25.785.418 287.008.027 (*) Differences between the transactions reflected in the profit or loss statement based on nominal amounts and the amounts carried in the funds and the amounts valued on the basis of purchasing power are transferred to retained earnings at the end of maturity. (**) As of 30 September 2026, shares with a nominal value of TL 1.214, corresponding to 0,035% of the company's capital, were bought back to TL 65.181.
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(Convenience translation of a report and financial statements originally issued in Turkish) TÜRK TELEKOMÜNİKASYON ANONİM ŞİRKETİ AND ITS SUBSIDIARIES INTERIM CONDENSED CONSOLIDATED STATEMENT OF CASH FLOWS FOR THE NINE MONTHS PERIOD ENDED 30 SEPTEMBER 2026 (All amounts disclosed in the consolidated financial statements and notes have been expressed in thousand currency units and are expressed in terms of purchasing power of Turkish Lira as of 30 September 2026 unless otherwise stated.) The accompanying notes form an integral part of these consolidated financial statements. 7 Current Period Prior Period Unaudited Unaudited Notes 1 January - 30 September 2026 1 January - 30 September 2025 Net profit for the period: 25.785.418 27.675.154 Adjustments to reconcile profit: Adjustments for depreciation and amortisation expense 52.419.047 42.594.521 Adjustments for impairment loss / (reversal of impairment loss) - Adjustments for impairment loss of receivables 1.007.997 975.521 - Adjustments for impairment loss of tangible assets (91) 7 - Adjustments for impairment loss of inventories (2.901) 8.571 - Other adjustments for impairment loss (reversal of impairment loss) − (903) Adjustments for provisions - Adjustments for (reversal of) provisions related with employee benefits 6.013.479 6.803.879 - Adjustments for (reversal of) lawsuit and/or penalty provisions 542.807 133.128 Adjustments for interest expenses and income - Adjustments for interest income (9.190.521) (4.059.033) - Adjustments for interest expense 10.368.759 9.284.814 - Deferred financial expenses / (incomes) from credit purchases 19.315 (52.427) Adjustments for unrealised foreign exchange losses 43.059.795 17.898.655 Adjustments for fair value losses / (gains) - Adjustments for fair value losses on derivative financial instruments 88.593 430.854 - Adjustments for fair value gains of financial assets (1.836) (1.002.597) Adjustments for tax expense 15.581.925 13.112.832 Adjustments for gains arising from sale of tangible assets - Adjustments for losses arising from sale of tangible assets (868.144) (503.745) Other adjustments for which cash effects are investing or financing cash flow 5.095.715 930.312 Monetary losses (52.884.757) (22.114.858) Other adjustments for non-cash items 5,17 (2.099.369) (1.383.457) Operating profit before working capital changes 94.935.231 90.731.228 Changes in working capital: Adjustments for (increase) / decrease in trade receivables - (Increase) in trade receivables from related parties (78.789) (571.468) - (Increase) in trade receivables from unrelated parties (7.137.984) (990.430) Adjustments for (increase) / decrease in inventories (1.049.850) 1.195.033 Adjustments for receivables and payables from financial sector activities 306.830 300.251 Adjustments for increase in trade payable - Increase in trade payables to related parties 529.372 252.632 - Increase in trade payables to unrelated parties 2.394.361 383.191 Adjustments for (increase) / decrease in other receivables related with operations - (Increase) / decrease in other unrelated party receivables related with operations (26.351.520) 2.362.605 Adjustments for increase in other operating payables related with operations - (Increase) / decrease in other payables related with operations to unrelated parties 663.836 (3.826.008) Cash flow from operations: Interest received 1.032.268 1.100.789 Payments related with provisions for employee benefits (5.001.451) (5.065.445) Payments related with other provisions (619.884) (89.700) Income taxes paid (5.764.087) (3.120.578) Other outflows of cash 17 (531.227) (467.213) Net cash generated from operating activities 53.327.106 82.194.887
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(Convenience translation of a report and financial statements originally issued in Turkish) TÜRK TELEKOMÜNİKASYON ANONİM ŞİRKETİ AND ITS SUBSIDIARIES INTERIM CONDENSED CONSOLIDATED STATEMENT OF CASH FLOWS FOR THE NINE MONTHS PERIOD ENDED 30 SEPTEMBER 2026 (All amounts disclosed in the consolidated financial statements and notes have been expressed in thousand currency units and are expressed in terms of purchasing power of Turkish Lira as of 30 September 2026 unless otherwise stated.) The accompanying notes form an integral part of these consolidated financial statements. 8 Unaudited Unaudited Notes 1 January - 30 September 2026 1 January - 30 September 2025 Cash flows used in investing activities: Proceeds from sale of property, plant, equipment and intangible assets - Proceeds from sales of property, plant and equipment 1.356.382 676.678 Purchases of property, plant, equipment and intangible assets - Purchase of property, plant and equipment (63.212.247) (28.313.332) - Purchase of intangible assets (30.368.490) (29.828.235) Cash outflows arising from acquisition of shares or debt instruments of other businesses or funds (52.970) (322.060) Cash inflows arising from acquisition of shares or debt instruments of other businesses or funds − 16.729.184 Net cash (used in) / generated from investing activities (92.277.325) (41.057.765) Cash flows from financing activities: Proceed from borrowings - Proceeds from loans 24.628.232 12.757.495 - Cash inflows from issued debt instruments − 3.723.337 Repayments of borrowings - Loan repayments (13.874.138) (19.614.530) - Payment of issued of debt instruments − (14.824.709) Payments of lease liabilities (7.129.141) (6.490.476) Cash (outflows) from derivative instruments, net (11.401.994) (860.782) Interest paid (5.906.180) (9.607.192) Interest received 8.158.253 2.958.245 Payment for the repurchase of own shares (65.181) − Other cash (outflows) 17 (848.607) (1.124.810) Net cash (used in) / generated from financing activities (6.438.756) (33.083.422) NET INCREASE / (DECREASE) IN CASH AND CASH EQUIVALENTS BEFORE CURRENCY TRANSLATION DIFFERENCES (45.388.975) 8.053.700 IMPACT OF MONETARY LOSS ON CASH AND CASH EQUIVALENTS (8.770.820) (3.221.974) IMPACT OF FOREIGN CURRENCY TRANSLATION DIFFERENCES ON CASH AND CASH EQUIVALENTS 826.024 1.288.303 CASH AND CASH EQUIVALENTS AT THE BEGINNING OF THE PERIOD 80.785.630 10.077.652 CASH AND CASH EQUIVALENTS AT THE END OF THE PERIOD 6 27.451.859 16.197.681 Current Period Prior Period
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(Convenience translation of a report and financial statements originally issued in Turkish) TÜRK TELEKOMÜNİKASYON ANONİM ŞİRKETİ AND ITS SUBSIDIARIES NOTES TO THE INTERIM CONDENSED CONSOLIDATED STATEMENT AS AT AND FOR THE NINE MONTHS PERIOD ENDED 30 SEPTEMBER 2026 (All amounts disclosed in the consolidated financial statements and notes have been expressed in thousand currency units and are expressed in terms of purchasing power of Turkish Lira as of 30 September 2026 unless otherwise stated.) 9 1. REPORTING ENTITY Türk Telekomünikasyon Anonim Şirketi (“Türk Telekom” or “the Company”) is a joint stock company incorporated in Turkey. The Company has its history in the Posthane-i Amirane (Department of Post Office) which was originally established as a Ministry on 23 October 1840. On 4 February 1924, und er the Telephone and Telegraph, the authorization to install and operate telephone networks throughout Turkey was given to the General Directorate of Post, Telegraph and Telephone (“PTT”). The Company was founded on 24 April 1995 as a result of the split o f the telecommunication and postal services formerly carried out by the PTT. All of the personnel, assets and obligations of the PTT pertaining to telecommunication services were transferred to the Company, the shares of which were fully owned by the Republic of Turkey Ministry of Treasury and Finance (“the Treasury”). On 24 August 2005, Oger Telekomünikasyon A.Ş. (“OTAŞ”), entered into a Share Sale Agreement with the Turkey’s Privatization Authority for the purchase of a 55% stake in the Company. A Shareholders Agreement and a Share Pledge Agreement for the 55% block sale of the Company were signed on 14 November 2005 and then after, OTAŞ became the parent company of the Company. Out of TL 3.500.000 nominal amount of capital, 15% of the Company’s shares owned by the Treasury corresponding to a nominal amount of TL 525.000 have been issued to the public through an initial public offering with the permission of Directorate of Istanbu l Stock Exchange on 15 May 2008. Since then Company shares are traded in Borsa İstanbul with the name of TTKOM. As per the regulatory disclosure made by Türk Telekom on 15 August 2018, within the scope of the process, which is carried out in relation to takeover of OTAŞ’s 55% shares in our Company, Türk Telekom, by a special purpose vehicle (“SPV”), which the creditor banks of OTAŞ will be shareholders, a notification was made to our company by some of the creditor banks. The SPV mentioned in the said statements, LYY Telekomünikasyon A.Ş. (“LYY”) has informed the Company that in accordance with Article 198 of the Turkish Commercial Code, all of the Group A shares, which constitute 55% of the Company's capital, have been transferred to LYY as of 21 December 2018. Based on this notification, LYY has been registered as a shareholder in the Company’s share book pursuant to Article 499 of the Turkish Commercial Code. In the material event statement dated 10 March 2022 made by the company, LYY Telekomünikasyon A.Ş. (LYY), 55% owned by Türk Telekomünikasyon A.Ş. (Türk Telekom) share to the Turkey Wealth Fund (TWF), a share transfer agreement was signed between the partie s, after the necessary approvals were obtained and the closing conditions were fulfilled, in the material event statement dated 31 March 2022, the transfer of the shares was completed, after the transfer, on 31 March 2022. It has been reported that the Tur kish Wealth Fund (TWF) is the largest shareholder of Türk Telekom with 61,68% shareholding as of date. Following the signing of the share transfer agreement stated in the aforementioned explanations, the Company was informed that as of 31 March 2022, all of the A Group shares, which constitute 55% of the Company’s capital, were transferred to TWF in accordance with Article 198 of the Turkish Commercial Code. Based on this notification, TWF was registered as a new shareholder in the Company’s share book in accordance with Article 499 of the Turkish Commercial Code. As at 30 September 2026, the parent company and controlling party of the Company is Turkish Wealth Fund. Under a concession agreement signed between the Company and the Information and Communication Technologies Authority (“ICTA”) (formerly the Turkish Telecommunications Authority)” on 14 November 2005 (“Concession Agreement”), the Company is granted the right to provide all kinds of telecommunications services, establish the necessary telecommunications facilities, allow other licensed operators to use these facilities, and market and supply telecommunications services for a period of 25 years, starting on 28 February 2001. Before the expiration of the concession period, negotiations were held between the ICTA (Information and Communication Technologies Authority) and the Company, resulting in an agreement that extended the concession period by 24 years, until 28 February 2050 with the extension agreement signed on 27 February 2026. Under the extension agreement, the Company will pay ICTA a total extension fee of 2.5 billion USD in a payment plan spread over 10 years, starting from the last business day of 2026. The value-added tax related to the extension fee was paid in March 2026. In the event that the Concession Agreement expires or is not renewed, the Company is obligated to transfer all equipment necessary for the operation of the system, in working condition, along with the immovable properties in its possession where this equipment is installed, to ICTA or an organization designated by ICTA, free of charge.
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(Convenience translation of a report and financial statements originally issued in Turkish) TÜRK TELEKOMÜNİKASYON ANONİM ŞİRKETİ AND ITS SUBSIDIARIES NOTES TO THE INTERIM CONDENSED CONSOLIDATED STATEMENT AS AT AND FOR THE NINE MONTHS PERIOD ENDED 30 SEPTEMBER 2026 (All amounts disclosed in the consolidated financial statements and notes have been expressed in thousand currency units and are expressed in terms of purchasing power of Turkish Lira as of 30 September 2026 unless otherwise stated.) 10 1. REPORTING ENTITY (CONTINUED) The details of the Company’s subsidiaries as at 30 September 2026 and 31 December 2025 are as follows: Effective ownership of the Company (%) Name of Subsidiary Place of incorporation and operation Principal activity Functional Currency 30 September 2026 31 December 2025 TTNet Anonim Şirketi (“TTNet”) Turkey Internet service provider Turkish Lira 100 100 TT Mobil İletişim Hizmetleri A.Ş. (“TT Mobil”) Turkey GSM operator Turkish Lira 100 100 Argela Yazılım ve Bilişim Teknolojileri Sanayi ve Ticaret Anonim Şirketi (“Argela”) Turkey Telecommunication solutions Turkish Lira 100 100 Innova Bilişim Çözümleri Anonim Şirketi (“Innova”) Turkey Telecommunication solutions Turkish Lira 100 100 Assistt Rehberlik ve Müşteri Hizmetleri Anonim Şirketi (“AssisTT”) Turkey Call center and customer relations Turkish Lira 100 100 Sebit Eğitim ve Bilgi Teknolojileri A.Ş. (“Sebit”) Turkey Web Based Learning Turkish Lira 100 100 NETSIA Inc. USA Telecommunications solutions U.S. Dollar 100 100 Sebit LLC. USA Web based learning U.S. Dollar 100 100 TT International Holding B.V. (*) Netherlands Holding company Euro 100 100 Türk Telekom International AT GmbH (*) Austria Internet/data services, infrastructure and wholesale voice services provider Euro 100 100 Türk Telekom International Hu Kft (*) Hungary Internet/data services, infrastructure and wholesale voice services provider Euro 100 100 S.C. Euroweb Romania S.A. (*) Romania Internet/data services, infrastructure and wholesale voice services provider Euro 100 100 Türk Telekom International Bulgaria EODD (*) Bulgaria Internet/data services, infrastructure and wholesale voice services provider Euro 100 100 Türk Telekom International CZ s.r.o. (*) Czech Republic Internet/data services, infrastructure and wholesale voice services provider Euro 100 100 Türk Telekom International SRB d.o.o. (*) Serbia Internet/data services, infrastructure and wholesale voice services provider Euro 100 100 TTINT Telekomunikacije d.o.o. (*) Slovenia Internet/data services, infrastructure and wholesale voice services provider Euro 100 100 Türk Telekom International SK s.r.o. (*) Slovakia Internet/data services, infrastructure and wholesale voice services provider Euro 100 100 TT International Telekomünikasyon Sanayi ve Ticaret Limited Şirketi (*) Turkey Internet/data services, infrastructure and wholesale voice services provider Euro 100 100 Türk Telekom International UA LLC. (*) Ukraine Internet/data services, infrastructure and wholesale voice services provider Euro 100 100 Türk Telekom International Italy S.R.L. (*) Italy Internet/data services, infrastructure and wholesale voice services provider Euro 100 100 TTINT International MK DOOEL. (*) Macedonia Internet/data services, infrastructure and wholesale voice services provider Euro 100 100 Türk Telekom International RU LLC. (*) Russia Internet/data services, infrastructure and wholesale voice services provider Euro 100 100 Türk Telekom International d.o.o. (*) Croatia Internet/data services, infrastructure and wholesale voice services provider Euro 100 100 Türk Telekom International HK Limited (*) Hong Kong Internet/data services, infrastructure and wholesale voice services provider H.K. Dollar 100 100 Net Ekran TV ve Medya Hiz. A.Ş. (“Net Ekran”) Turkey Television and radio broadcasting Turkish Lira 100 100 TTES Elektrik Tedarik Satış A.Ş. (“TTES”) Turkey Electrical energy trading Turkish Lira 100 100 TT Ödeme ve Elektronik Para Hizmetleri A.Ş. Turkey Mobile finance Turkish Lira 100 100 Net Ekran1 TV ve Medya Hiz. A.Ş. (“Net Ekran1”) Turkey Television and radio broadcasting Turkish Lira 100 100 Net Ekran2 TV ve Medya Hiz. A.Ş. (“Net Ekran2”) Turkey Television and radio broadcasting Turkish Lira 100 100 Net Ekran3 TV ve Medya Hiz. A.Ş. (“Net Ekran3”) Turkey Television and radio broadcasting Turkish Lira 100 100 Net Ekran4 TV ve Medya Hiz. A.Ş. (“Net Ekran4”) Turkey Television and radio broadcasting Turkish Lira 100 100 Net Ekran6 TV ve Medya Hiz. A.Ş. (“Net Ekran6”) Turkey Television and radio broadcasting Turkish Lira 100 100 Net Ekran10 TV ve Medya Hiz. A.Ş. (“Net Ekran10”) Turkey Television and radio broadcasting Turkish Lira 100 100 Net Ekran11 TV ve Medya Hiz. A.Ş. (“Net Ekran11”) Turkey Television and radio broadcasting Turkish Lira 100 100 TT Satış ve Dağıtım Hizmetleri Anonim Şirketi Turkey Selling and distribution services Turkish Lira 100 100 TT Ventures Proje Geliştirme A.Ş. Turkey Corporate venture capital Turkish Lira 100 100 TT Destek Hizmetleri A.Ş. Turkey Provider of combined facilities support activities Turkish Lira 100 100 APPYAP Teknoloji ve Bilişim A.Ş. Turkey Web portal and computer programming activities Turkish Lira 100 100 TTG Finansal Teknolojiler A.Ş. Turkey Financial advisory services Turkish Lira 100 100 TTG Ventures Marketing Inc. USA Retail and wholesale trade of software programs U.S. Dollar 100 100 Assistt Holland B.V. Netherlands Call center activities Euro 100 100 TT Finansman A.Ş. Turkey Consumer finance company activities Turkish Lira 100 100 TT Varlık Kiralama A.Ş. Turkey Arranging Lease Certificate Issuances and approving exclusively lease certificates Turkish Lira 100 100 Türk Telekom Kıbrıs Toptan Hizmetler Limited Şirketi TRNC Providing fixed infrastructure services in the field of telecommunications Turkish Lira 100 100 Türk Telekom Kıbrıs Perakende Limited Şirketi TRNC To provide retail fixed products and services in the field of telecommunications. Turkish Lira 100 100 Giftplay Dijital Oyun Servisleri A.Ş. Turkey Selling products, services in electronic media and all kinds of software, hardware, licenses services related to these products/services. Turkish Lira 100 100 (*) Hereinafter, will be referred as TTINT Group.
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(Convenience translation of a report and financial statements originally issued in Turkish) TÜRK TELEKOMÜNİKASYON ANONİM ŞİRKETİ AND ITS SUBSIDIARIES NOTES TO THE INTERIM CONDENSED CONSOLIDATED STATEMENT AS AT AND FOR THE NINE MONTHS PERIOD ENDED 30 SEPTEMBER 2026 (All amounts disclosed in the consolidated financial statements and notes have been expressed in thousand currency units and are expressed in terms of purchasing power of Turkish Lira as of 30 September 2026 unless otherwise stated.) 11 1. REPORTING ENTITY (CONTINUED) The details of the Company’s joint operation and affiliates as at 30 September 2026 and 31 December 2025 are as follows: Effective ownership of the Company (%) Name of Joint Operation Place of incorporation and operation Principal activity Functional Currency 30 September 2026 31 December 2025 TT Mobil-Vodafone Evrensel İş Ortaklığı Turkey Internet/data services, infrastructure and wholesale voice services provider Turkish Lira 51 51 Effective ownership of the Company (%) Affiliate Place of incorporation and operation Principal activity Functional Currency 30 September 2026 31 December 2025 TT Ventures Girişim Sermayesi Yatırım Fonu Turkey Internet/data services, infrastructure and wholesale voice services provider Turkish Lira 100 100 The Group indirectly holds investment in its affiliates, which has a significant influence, through its contribution payments to the established Venture Capital Investment Fund. The Group has chosen to measure this investment at fair value through profit or loss in accordance with TFRS 9. Hereinafter, Türk Telekom and its subsidiaries , affiliate and joint operations together will be referred to as “the Group”. The Group’s principal activities include the provision of local, national, international and mobile telecommunication services, internet products and services, as well as call center and customer relationship management, technology and information management. The Company’s registered office address is Turgut Özal Bulvarı, 06103 Aydınlıkevler, Ankara. The number of personnel subjects to collective agreement as at 3 0 September 2026 is 8.175 (31 December 2025: 8.505) and the number of personnel not subject to collective agreement as at 3 0 September 2026 is 2 3.983 (31 December 2025: 23.274). The total number of personnel as at 3 0 September 2026 and 31 December 2025 are 32.158 and 31.779 respectively. 2. BASIS OF PRESENTATION OF FINANCIAL STATEMENTS 2.1 Basis of presentation of the interim condensed consolidated financial statements a) Statement of compliance with TFRS The accompanying interim condensed consolidated financial statements are prepared in accordance with Turkish Financial Reporting Standards (“TFRS”) published by Public Oversight Accounting and Auditing Standards Authority (“POA”) as set out in the Communiq ué numbered II -14.1 “Communiqué on Principles of Financial Reporting in Capital Markets” published in the Official Gazette numbered 28676 on 13 June 2013. TFRSs consist of standards and interpretations which are published as Turkish Accounting Standards (“TAS”), Turkish Financial Reporting Standards, interpretations of TAS and interpretations of TFRS. The interim condensed consolidated financial statements are presented in accordance with the formats determined in the "Announcement on TFRS Taxonomy" published by the POA on 3 July 2024 and in the Financial Statement Samples and User Guide published by the CMB. In accordance with the TAS, the entities are allowed to prepare a complete or condensed set of interim financial statements in accordance with TAS 34, “Interim Financial Reporting”. In this respect, the Group preferred to present its nine-month interim condensed consolidated financial statements as of 30 September 2026. The Group’s interim condensed consolidated financial statement does not include all disclosures and notes that should be included at year -end financial statements. Therefore, the interim con densed consolidated financial statements should be examined together with the 31 December 202 5 year-end financial statements. Interim condensed consolidated financial statement does not, by themselves, serve as an indicator of year-end financial statements. Approval of the financial statements: The interim condensed consolidated financial statements are approved by the Company’s Board of Directors on 4 November 2026. General Assembly has the right to change the interim condensed consolidated financial statements.
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(Convenience translation of a report and financial statements originally issued in Turkish) TÜRK TELEKOMÜNİKASYON ANONİM ŞİRKETİ AND ITS SUBSIDIARIES NOTES TO THE INTERIM CONDENSED CONSOLIDATED STATEMENT AS AT AND FOR THE NINE MONTHS PERIOD ENDED 30 SEPTEMBER 2026 (All amounts disclosed in the consolidated financial statements and notes have been expressed in thousand currency units and are expressed in terms of purchasing power of Turkish Lira as of 30 September 2026 unless otherwise stated.) 12 2. BASIS OF PRESENTATION OF FINANCIAL STATEMENTS (CONTINUED) 2.1 Basis of presentation of the interim condensed consolidated financial statements (continued) b) Correction of financial statements during the hyperinflationary periods All comparative amounts of the financial statements in question and those of previous periods were adjusted according to the changes in the general purchasing power of the Turkish lira in accordance with IAS 29 and were finally expressed in terms of the purchasing power of the Turkish lira on 30 September 2026. The adjustments made in accordance with IAS 29 were made using the adjustment coefficient obtained from the Consumer Price Index (CPI) of Turkey published by the Turkish Statistical Institute (TURKSTAT), in accordance with the guidance provided by the POA. The indices and adjustment coefficients used in the adjustment of the consolidated financial statements are as follows: Date Index Index (%) Conversion factor 2024 2.684,55 44,38 1,6273 30 September 2025 3.367,22 25,43 1,2973 2025 3.513,87 30,89 1,2432 30 September 2026 4.368,44 24,32 1,0000 Assets and liabilities were separated into those that were monetary and non-monetary, with non-monetary items were further divided into those measured on either a current or historical basis to perform the required restatement of financial statements under TAS 29. Monetary items (other than index -linked monetary items) and non-monetary items carrie d at amounts current at the end of the reporting period were not restated because they are already expressed in terms of measuring unit as of 30 September 2026. Nonmonetary items which are not expressed in terms of measuring unit as of 30 September 2026 were restated by applying the conversion factors. All income and expenses included in the statement of comprehensive income, excluding those impacting the statement of comprehensive income from non-monetary items in the Statement of Financial Position, are indexed using coefficients calculated based on th e periods in which they were first recognized in the financial statements. In addition, income and expenses arising from non -monetary items are calculated based on the values of these items adjusted to their purchasing power at the end of the current period. The application of TAS 29 necessitated adjustments presented in the Net Monetary Position Gains/(Losses) item in the profit or loss section of the statement of profit or loss and other comprehensive income, arising from the decrease in the purchasing power of the Turkish lira. As long as the value of monetary assets or liabilities does not depend on changes in the index, the purchasing power of enterprises with a higher amount of monetary assets than monetary liabilities decrease during the inflation period , while the purchasing power of enterprises with a higher amount of monetary liabilities than monetary assets increase. The net monetary position gain or loss is obtained from the adjustment differences of non -monetary items, equity, items in the statement of profit or loss and other comprehensive income and monetary assets and liabilities related to the index. In addition, in the reporting period in which TAS 29 was first applied, the provisions of the Standard were applied assuming that there was always high inflation in the relevant economy. Therefore, in order to form the basis for subsequent reporting periods, the statement of financial position dated 1 January 2022 was adjusted for inflation. The inflation -adjusted amount of the retained earnings/losses item in the statement of financial position dated 1 January 2022 was obtained from the balance sheet bala nce that should have been obtained after adjusting the other items of the said table for inflation. On the other hand, the financial statements of the enterprises whose functional currency does not belong to the economy with high inflation are not subject to inflation adjustment and are translated in accordance with TAS 21. However, in the indexation of comparative financial statements for presentation purposes, the amounts belonging to these subsidiaries were also indexed and their effects were shown in the foreign currency translation differences item. Exchange rate differences arising from the translation were recognized in the “Foreign Currency Translation Differences” item in other comprehensive income in accordance with the TAS 21 Effects of Exchange Rate Changes standard.
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(Convenience translation of a report and financial statements originally issued in Turkish) TÜRK TELEKOMÜNİKASYON ANONİM ŞİRKETİ AND ITS SUBSIDIARIES NOTES TO THE INTERIM CONDENSED CONSOLIDATED STATEMENT AS AT AND FOR THE NINE MONTHS PERIOD ENDED 30 SEPTEMBER 2026 (All amounts disclosed in the consolidated financial statements and notes have been expressed in thousand currency units and are expressed in terms of purchasing power of Turkish Lira as of 30 September 2026 unless otherwise stated.) 13 2. BASIS OF PRESENTATION OF FINANCIAL STATEMENTS (CONTINUED) 2.1 Basis of presentation of the interim condensed consolidated financial statements (continued) c) Basis of measurement The consolidated financial statements have been prepared on the historical cost basis except for the property, plant and equipment other than lands, short term and long term financial investments and investment property acquisitions prior to 1 January 2000 for which the deemed cost method was applied in accordance with TAS 29 “Financial Reporting in Hyperinflationary Economies”, lands, derivative financial instruments, issued debt instruments which have been measured at fair value through profit or loss. In vestment properties and tangible assets other than lands which are recognized with deemed cost method are valued with fair values as of 1 January 2000, lands accounted as property, plant and equipment, derivative financial instruments and issued debt instruments which have been measured at fair value through profit or loss, are valued with fair values as of balance sheet date. d) Functional and presentation currency Excluding the subsidiaries incorporated outside of Turkey, functional currency of all entities included in consolidation is Turkish Lira (“TL”) and they maintain their books of account in TL in accordance with Turkish Commercial Code, Tax Legislation and t he Uniform Chart of Accounts issued by the Ministry of Treasury and Finance. Functional currencies of the subsidiaries and Company’s joint operation are presented in Note 1. The interim condensed consolidated financial statements are based on the statutory records, with adjustments and reclassifications for the purpose of fair presentation in accordance with the Turkish Accounting Standards published by the POA and are presented in TL. Additional paragraph for convenience translation to English: The accounting principles described in Note 2 (defined as Turkish Accounting Standards/Turkish Financial Reporting Standards) to the accompanying consolidated financial statements differ from International Financial Reporting Standards (“IFRS”) issued by the International Accounting Standards Board (“IASB”) with respect to the appl ication of inflation accounting, classification of some income statement items and also for certain disclosures requirement of the POA. e) Significant accounting assessments, estimates and assumptions In order to prepare financial statements in accordance with TFRS, certain assumptions affecting notes to the financial statements and critical accounting estimations related to assets, liabilities, contingent assets and contingent liabilities are required to be used. Although these estimations are made upon the best afford of the management by interpreting the cyclical circumstances, actual results may differ from the forecasts. Issues that are complex and needs further interpretation, which might have a critical impact on financial statements. Taxes The Company and its subsidiaries located in Turkey are subject to the tax legislation and practices in force in Turkey. In accordance with the tax legislation, corporate tax is paid for the first three quarters by calculating a provisional tax of 25% on the earnings generated quarterly, and the amounts paid in this way are offset from the tax calculated on annual earnings. Deferred tax charge is calculated in accordance with the enacted tax laws. The accounting policies used by the Group in calculating deferred tax are the same as those used in the independently audited consolidated financial statements prepared as of 31 December 2025. Determination of fair values A number of the Group’s accounting policies and disclosures require the determination of fair value, for both financial and non -financial assets and liabilities. Fair values have been determined for measurement and/or disclosure purposes based on the following methods. When applicable, further information about the assumptions made in determining fair values is disclosed in the notes specific to that asset or liability.
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(Convenience translation of a report and financial statements originally issued in Turkish) TÜRK TELEKOMÜNİKASYON ANONİM ŞİRKETİ AND ITS SUBSIDIARIES NOTES TO THE INTERIM CONDENSED CONSOLIDATED STATEMENT AS AT AND FOR THE NINE MONTHS PERIOD ENDED 30 SEPTEMBER 2026 (All amounts disclosed in the consolidated financial statements and notes have been expressed in thousand currency units and are expressed in terms of purchasing power of Turkish Lira as of 30 September 2026 unless otherwise stated.) 14 2. BASIS OF PRESENTATION OF FINANCIAL STATEMENTS (CONTINUED) 2.1 Basis of presentation of the interim condensed consolidated financial statements (continued) Determination of fair values (continued) i) Trade and other receivables The fair value of trade and other receivables is estimated as the present value of future cash flows discounted at the market rate of interest at the reporting date. Short-term receivables with no stated interest rate are measured at the original invoice amount if the effect of discounting is immaterial. This fair value is determined at initial recognition and at the end of each reporting period for disclosure purposes. ii) Forward contracts and interest rate swaps The fair value of interest rate swaps and forward exchange contracts are based on broker quotes. Those quotes are tested for reasonableness by discounting estimated future cash flows based on the terms and maturity of each contract and using market interes t rates for a similar instrument at the measurement date. Fair values reflect the credit risk of the instrument and include adjustments to take account of the credit risk of the Group entity and counterparty when appropriate. iii) Issued debt instruments The fair values of issued debt instruments are measured by using quoted market price at the date of valuation. iv) Other non-derivative financial liabilities Other non -derivative financial liabilities are measured at fair value, at initial recognition and for disclosure purposes, at each annual reporting date. Fair value is calculated based on the present value of future principal and interest cash flows, discounted at the market rate of interest at the measurement date. v) Lands Lands accounted as property, plant and equipment are measured at revalued amount. Revalued amount is the value found by deducting the subsequent impairment loss from the fair value determined based on the transaction prices of lands of similar nature and location using the comparable method on the date of revaluation. 2.2 Summary of significant accounting policies The new standards, amendments and interpretations The accounting policies adopted in preparation of the consolidated financial statements as of 30 September 2026 are consistent with those of the previous financial year, except for the adoption of new and amended TFRS and TFRS interpretations effective as of 1 January 2026 and thereafter. The effects of these standards and interpretations on the Group’s financial position and performance have been disclosed in the related paragraphs. i) The new standards, amendments and interpretations which are effective as of 1 January 202 6 are as follows: Amendments to TFRS 9 and TFRS 7 – Classification and measurement of financial instruments In August 2025, POA issued amendments to the classification and measurement of financial instruments (amendments to TFRS 9 and TFRS 7). The amendment clarifies that a financial liability is derecognized on the ‘settlement date’. It also introduces an accounting policy option to derecognize financial liabilities that are settled through an electronic payment system before settlement date if certain conditions are met. The amendment also clarified how to assess the contractual cash flow characteristics of fin ancial assets that include environmental, social and governance (ESG) -linked features and other similar contingent features as well as the treatment of non-recourse assets and contractually linked instruments. Additional disclosures in TFRS 7 for financial assets and liabilities with contractual terms that reference a contingent event (including those that are ESG -linked), and equity instruments classifie d at fair value through other comprehensive income are added with the amendment. The new requirements are applied retrospectively with an adjustment to opening retained earnings. The amendments did not have a significant impact on the financial position or performance of the Group.
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(Convenience translation of a report and financial statements originally issued in Turkish) TÜRK TELEKOMÜNİKASYON ANONİM ŞİRKETİ AND ITS SUBSIDIARIES NOTES TO THE INTERIM CONDENSED CONSOLIDATED STATEMENT AS AT AND FOR THE NINE MONTHS PERIOD ENDED 30 SEPTEMBER 2026 (All amounts disclosed in the consolidated financial statements and notes have been expressed in thousand currency units and are expressed in terms of purchasing power of Turkish Lira as of 30 September 2026 unless otherwise stated.) 15 2. BASIS OF PRESENTATION OF FINANCIAL STATEMENTS (CONTINUED) 2.2 Summary of significant accounting policies (continued) The new standards, amendments and interpretations (continued) i) The new standards, amendments and interpretations which are effective as of 1 January 2026 are as follows (continued) Annual Improvements to TFRSs – Volume 11 In September 2025, POA issued Annual Improvements to TFRSs – Volume 11, amending the followings: - TFRS 1 First -time Adoption of International Financial Reporting Standards – Hedge Accounting by a First-time Adopter: These amendments are intended to address potential confusion arising from an inconsistency between the wording in TFRS 1 and the requirements for hedge accounting in TFRS 9. - TFRS 7 Financial Instruments: Disclosures – Gain or Loss on Derecognition: The amendments update the language on unobservable inputs in the Standard and include a cross reference to TFRS 13. - TFRS 9 Financial Instruments – Lessee Derecognition of Lease Liabilities and Transaction Price: TFRS 9 has been amended to clarify that, when a lessee has determined that a lease liability has been extinguished in accordance with TFRS 9, the lessee is required to apply derecognition requirement of TFRS 9 and recogni se any resulting gain or loss in profit or loss. TFRS 9 has been also amended to remove the reference to 'transaction price”. - TFRS 10 Consolidated Financial Statements – Determination of a 'De Facto Agent': The amendments are intended to remove the inconsistencies between TFRS 10 paragraphs. - TAS 7 Statement of Cash Flows – Cost Method: The amendments remove the term of “cost method” following the prior deletion of the definition of 'cost method'. The amendments did not have a significant impact on the financial position or performance of the Group. Amendments to TFRS 9 and TFRS 7 – Contracts Referencing Nature-dependent Electricity In August 2025, POA issued Contracts Referencing Nature -dependent Electricity (Amendments to TFRS 9 and TFRS 7). The amendment clarifies the application of the “own use” requirements and permits hedge accounting if these contracts are used as hedging instruments. The amendment also adds new disclosure requirements to enable investors to understand the effect of these contracts on a company’s financial performance and cash flows. The clarifications regarding the ‘own use’ requirements must be applied retrosp ectively, but the guidance permitting hedge accounting have to be applied prospectively to new hedging relationships designated on or after the date of initial application. The amendments did not have a significant impact on the financial position or performance of the Group. ii) Standards issued but not yet effective and not early adopted Standards, interpretations and amendments to existing standards that are issued but not yet effective up to the date of issuance of the consolidated financial statements are as follows. The Group will make the necessary changes if not indicated otherwise, which will be affecting the consolidated financial statements and disclosures, when the new standards and interpretations become effective. Amendments to TFRS 10 and TAS 28: Sale or Contribution of Assets between an Investor and its Associate or Joint Venture In December 2017, POA postponed the effective date of this amendment made to TFRS 10 and TAS 28 indefinitely pending the outcome of its research project on the equity method of accounting. Early application of the amendments is still permitted. The Group will wait until the final amendment to assess the impacts of the changes.
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(Convenience translation of a report and financial statements originally issued in Turkish) TÜRK TELEKOMÜNİKASYON ANONİM ŞİRKETİ AND ITS SUBSIDIARIES NOTES TO THE INTERIM CONDENSED CONSOLIDATED STATEMENT AS AT AND FOR THE NINE MONTHS PERIOD ENDED 30 SEPTEMBER 2026 (All amounts disclosed in the consolidated financial statements and notes have been expressed in thousand currency units and are expressed in terms of purchasing power of Turkish Lira as of 30 September 2026 unless otherwise stated.) 16 2. BASIS OF PRESENTATION OF FINANCIAL STATEMENTS (CONTINUED) 2.2 Summary of significant accounting policies (continued) The new standards, amendments and interpretations (continued) ii) Standards issued but not yet effective and not early adopted (continued) TFRS 17 - Standard for Insurance contracts POA issued TFRS 17 in February 2019, a comprehensive new accounting standard for insurance contracts covering recognition and measurement, presentation and disclosure. TFRS 17 model combines a current balance sheet measurement of insurance contract liabili ties with the recognition of profit over the period that services are provided. The mandatory effective date of the Standard postponed to accounting periods beginning on or after 1 January 2027 with the announcement made by the POA. The standard in question does not apply to the Group and will have no impact on the Group’s financial position or performance. TFRS 18 – The new Standard for Presentation and Disclosure in Financial Statements In May 2025, POA issued TFRS 18 which replaces TAS 1. TFRS 18 introduces new requirements on presentation within the statement of profit or loss, including specified totals and subtotals. TFRS 18 requires an entity to classify. TFRS 18 requires an entity to classify all income and expenses within its statement of profit or loss into one of five categories: operating; investing; financing; income taxes; and discontinued operations. It also requires disclosure of management -defined performance measures and includes new requirements for aggregation and disaggregation of financial information based on the identified ‘roles’ of the primary financial statements and the notes. In addition, there are consequential amendments to other accounting standards, such as TAS 7, TA S 8 and TAS 34. TFRS 18 and the related amendments are effective for reporting periods beginning on or after 1 January 2027, but earlier application is permitted. TFRS 18 will be applied retrospectively. The Group is in the process of assessing the impact of the standard on financial position or performance of the Group. TFRS 19 – The new Standard for Subsidiaries without Public Accountability: Disclosures In August 2025, POA issued TFRS 19, which allows eligible entities to elect to apply reduced disclosure requirements while still applying the recognition, measurement and presentation requirements in other TFRS accounting standards. Unless otherwise specified, eligible entities that elect to apply TFRS 19 will not need to apply the disclosure requirements in other TFRS accounting standards. An entity that is a subsidiary does not have public accountability and has a parent (either ultimate or intermediate) which prepares consolidated financial statements, available for public use, which comply with TFRS accounting standards may elect to apply TFRS 19. TFRS 19 is effective for reporting periods beginning on or after 1 January 2027 and earlier adoption is permitted. If an eligible entity chooses to apply the standard earlier, it is required to disclos e that fact. An entity is required, during the first period (annual and interim) in which it applies the standard, to align the disclosures in the comparative period with the disclosures included in the current period under TFRS 19. The impacts of the standard in question on the Group’s financial position and performance are being evaluated. Amendments to TAS 21 – Translation to a Hyperinflationary Presentation Currency The amendments issued by the POA in April 2026 require translation from a non -hyperinflationary functional currency into a hyperinflationary presentation currency at the closing rate. Accordingly, if an entity’s functional currency is the currency of a non -hyperinflationary economy, but its presentation currency is the currency of a hyperinflationary economy, its results and financial position are translated into the presentation currency by translating all amounts (i.e., assets, liabilities, equity items, income and expenses) and all comparatives at the closing rate at the end of t he current reporting period. Furthermore, an entity whose functional currency and presentation currency are the currency of a hyperinflationary economy, restates the comparative amounts of a foreign operation, whose functional currency is that of a non-hyperinflationary economy, by applying the general price index, in accordance with TAS 29, to the foreign operation’s comparative figures. The amendments also introduce certain additional disclosure requirements.
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(Convenience translation of a report and financial statements originally issued in Turkish) TÜRK TELEKOMÜNİKASYON ANONİM ŞİRKETİ AND ITS SUBSIDIARIES NOTES TO THE INTERIM CONDENSED CONSOLIDATED STATEMENT AS AT AND FOR THE NINE MONTHS PERIOD ENDED 30 SEPTEMBER 2026 (All amounts disclosed in the consolidated financial statements and notes have been expressed in thousand currency units and are expressed in terms of purchasing power of Turkish Lira as of 30 September 2026 unless otherwise stated.) 17 2. BASIS OF PRESENTATION OF FINANCIAL STATEMENTS (CONTINUED) 2.2 Summary of significant accounting policies (continued) The new standards, amendments and interpretations (continued) ii) Standards issued but not yet effective and not early adopted (continued) Amendments to TAS 21 – Translation to a Hyperinflationary Presentation Currency (continued) The amendments apply for annual reporting periods beginning on or after 1 January 2027 and earlier application is permitted. If an entity’s functional currency and presentation currency are the currency of a hyperinflationary economy (or are the currencies of different hyperinflationary economies) and it translates the results and financial position of foreign operations whose functional currency is that of a non -hyperinflationary economy, then it is required to apply the amendments from the beginning of th e annual reporting period in which it first applies the amendments. In addition, it restates the comparative amounts of its foreign operations included in the entity’s previously issued financial statements by applying the general price index it applies to corresponding figures in accordance with TAS 29. Other entities will apply the amendments retrospectively. The Group is in the process of assessing the impact of the amendments on financial position or performance of the Group. Amendments to TAS 28 - Fair Value Option for Investments in Associates and Joint Ventures The amendments issued by the POA in July 2026 clarify which entities can apply the fair value option in TAS 28. The amendments explained that a ‘similar entity’ includes an entity with a main business activity of investing in particular types of assets, as described in paragraph 49(a) of IFRS 18. It is also clarified that eligibility to apply the fair value opt ion is assessed based on the entity that directly holds the investment in the associate or joint venture. The amendments are applied when an entity first applies IFRS 18. If an entity elects to apply IFRS 18 for an earlier period, the amendments are applied consistently with that early application. However, if IFRS 18 is applied early for a period beginning before the issuance of the amendments, entities apply the amendments for the first reporting period ending on or after their issuance. The amendments are applied retrospectively. The Group expects no significant impact on its financial statements. iii) The new amendments that are issued by the International Accounting Standards Board (IASB) but not issued by Public Oversight Authority (POA) The following IFRS 20 is issued by IASB but not yet adapted/issued by POA. Therefore, it does not constitute part of TFRS. The Group will make the necessary changes to its consolidated financial statements after the new Standard is issued and becomes effective under TFRS. IFRS 20 – Standard for Regulatory Assets and Regulatory Liabilities In May 2026, the Board issued IFRS 20, which sets out the requirements for the recognition, measurement, presentation and disclosure of regulatory assets, regulatory liabilities, regulatory income and regulatory expense. IFRS 20 introduces requirements that will result in information that supplements the information an entity already provides by applying IFRS accounting standards, such as IFRS 15. Such information enables users of financial statements to understand the total allowed compensation for regulatory goods or services supplied in each reporting period and the related rights and obligations. The standard is not applicable for the Group.
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(Convenience translation of a report and financial statements originally issued in Turkish) TÜRK TELEKOMÜNİKASYON ANONİM ŞİRKETİ AND ITS SUBSIDIARIES NOTES TO THE INTERIM CONDENSED CONSOLIDATED STATEMENT AS AT AND FOR THE NINE MONTHS PERIOD ENDED 30 SEPTEMBER 2026 (All amounts disclosed in the consolidated financial statements and notes have been expressed in thousand currency units and are expressed in terms of purchasing power of Turkish Lira as of 30 September 2026 unless otherwise stated.) 18 3. SEASONAL CHANGES IN THE OPERATIONS The operations of the Group are not subject to seasonal fluctuations. 4. EARNINGS PER SHARE 1 January - 30 September 2026 1 January - 30 September 2025 Weighted average number of ordinary shares outstanding during the year 349.936.511.111 349.950.000.000 Net profit for the period attributable to equity holders of the Company 25.785.418 27.675.154 Basic and earnings per share (in full kuruş) 7,3686 7,9083 5. SEGMENT REPORTING The Group has two main segments; fixed line and mobile. Fixed line services are provided by Türk Telekom, TTNet, Argela, Innova, Sebit, AssisTT, TTES, TT Venture s, TT Destek Hizmetleri and TTINT Group whereas mobile service is provided by TT Mobil. Group management assesses segment performance over earnings before interest, tax, depreciation and amorti sation (“Adjusted EBITDA”). Adjusted EBITDA is calculated by adjusting the profit before tax by i) adding income/expense from depreciation, amorti sation and impairment expenses and ii) deducting exchange gains/losses, fair value gains presented in income from investment activities, monetary gain and loss, interest and rediscount income / expense on current accounts presented in other operating income and expense. Group management uses adjusted EBITDA as it is comparable with other companies in the sector. EBITDA is not a measure of financial performance indicator defined in TFRS and may not be comparable to similar indicators defined by other companies. The segment results and balance sheet items are presented below:
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(Convenience translation of a report and financial statements originally issued in Turkish) TÜRK TELEKOMÜNİKASYON ANONİM ŞİRKETİ AND ITS SUBSIDIARIES NOTES TO THE INTERIM CONDENSED CONSOLIDATED FINANCIAL STATEMENTS AS AT AND FOR THE NINE MONTHS PERIOD ENDED 30 SEPTEMBER 2026 (All amounts disclosed in the consolidated financial statements and notes have been expressed in thousand currency units and are expressed in terms of purchasing power of Turkish Lira as of 30 September 2026 unless otherwise stated.) 19 Türk Telekom | Gizli | Kişisel Veri İçermez 5. SEGMENT REPORTING (CONTINUED) Fixed line Mobile Intra-group eliminations and consolidated adjustments Consolidated 1 January - 30 September 2026 1 January - 30 September 2025 1 January - 30 September 2026 1 January - 30 September 2025 1 January - 30 September 2026 1 January - 30 September 2025 1 January - 30 September 2026 1 January - 30 September 2025 Revenue 155.302.326 131.952.505 91.783.392 91.740.880 (10.575.300) (8.734.359) 236.510.418 214.959.026 International revenue 5.578.767 6.721.581 − − − − 5.578.767 6.721.581 Contributive revenue (*) 145.005.851 123.557.798 91.504.567 91.401.228 − − 236.510.418 214.959.026 EBITDA 60.676.752 44.963.223 38.530.663 45.853.118 (121.125) (39.038) 99.086.290 90.777.303 Contributive adjusted EBITDA (**) 54.901.528 41.425.464 44.184.762 49.351.839 − − 99.086.290 90.777.303 Capital expenditures (***) 144.213.110 36.380.168 83.931.247 22.152.354 (93.596) (35.578) 228.050.761 58.496.944 Impairments losses, net (520.173) (418.936) (484.832) (564.260) − − (1.005.005) (983.196) Depreciation and amortisation (27.142.760) (21.321.151) (25.276.287) (21.273.370) − − (52.419.047) (42.594.521) Fixed line Mobile Intra-group eliminations and consolidated adjustments Consolidated 1 July- 30 September 2026 1 July - 30 September 2025 1 July- 30 September 2026 1 July - 30 September 2025 1 July- 30 September 2026 1 July - 30 September 2025 1 July- 30 September 2026 1 July - 30 September 2025 Revenue 57.852.742 48.827.476 32.455.486 31.593.367 (3.929.490) (3.201.798) 86.378.738 77.219.045 International revenue 1.835.427 1.616.788 − − − − 1.835.427 1.616.788 Contributive revenue (*) 54.015.239 45.745.407 32.363.499 31.473.638 − − 86.378.738 77.219.045 EBITDA 22.764.377 18.893.368 14.327.953 15.760.025 (75.229) (11.359) 37.017.101 34.642.034 Contributive adjusted EBITDA (**) 20.616.655 17.573.591 16.400.446 17.068.443 − − 37.017.101 34.642.034 Capital expenditures (***) 16.569.904 16.457.706 11.375.870 11.677.777 (46.097) (9.590) 27.899.677 28.125.893 Impairments losses, net (224.897) (164.792) (151.041) (179.986) − − (375.938) (344.778) Depreciation and amortisation (9.223.979) (7.037.443) (8.836.998) (7.135.576) − − (18.060.977) (14.173.019) (*) “Contributive revenue” represents operating segments’ revenues from companies other than those included in the consolidated financial statements. Group management still monitors financial perfo rmance of the segments based on their separate financial statements and because of this there is no change at the segment informati on disclosed. However, contribution of operating segments on the Group’s revenue is presented to give additional information to the readers of the financial statements. (**) “Contributive EBITDA” represents operating segments’ EBITDA arose from transactions with companies other than those incl uded in the consolidated financial statements and revised by allocation of intra -group charges for shared costs. Group management still monitors financial performance of the segments based on their separate financial statements and because of this there is no change at the segment information disclosed. However, contribution of operating segments on the Group’s revenue is presented to give additional information to the readers of the financial statements. (***) Capital expenditures do not include TL 2.099.369 (30 September 2025: TL 1.383.457) amounted profit margin which is capitalized on intangible assets that are accounted within the scope of TFRS Interpretation 12.
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(Convenience translation of a report and financial statements originally issued in Turkish) TÜRK TELEKOMÜNİKASYON ANONİM ŞİRKETİ AND ITS SUBSIDIARIES NOTES TO THE INTERIM CONDENSED CONSOLIDATED FINANCIAL STATEMENTS AS AT AND FOR THE NINE MONTHS PERIOD ENDED 30 SEPTEMBER 2026 (All amounts disclosed in the consolidated financial statements and notes have been expressed in thousand currency units and are expressed in terms of purchasing power of Turkish Lira as of 3 0 September 2026 unless otherwise stated.) 20 Türk Telekom | Gizli | Kişisel Veri İçermez 5. SEGMENT REPORTING (CONTINUED) 1 January - 30 September 2026 1 July - 30 September 2026 1 January - 30 September 2025 1 July - 30 September 2025 Fixed line contributive EBITDA 54.901.528 20.616.655 41.425.464 17.573.591 Mobile contributive EBITDA 44.184.762 16.400.446 49.351.839 17.068.443 EBITDA 99.086.290 37.017.101 90.777.303 34.642.034 Foreign exchange gains, interest income, discount income on current accounts presented in other operating income 1.100.718 (872.754) 1.524.139 127.402 Foreign exchange losses, interest income, discount income on current accounts presented in other operating expense (-) (3.586.988) (329.214) (5.212.099) (1.148.418) Exchange rate protected deposit fair value gains presented in income from investment activities 1.836 663 1.002.597 − Financial income 10.643.782 3.418.659 8.254.450 2.446.183 Financial expense (-) (60.306.401) (23.626.163) (32.067.507) (9.121.806) Depreciation, amortisation and impairment (52.418.956) (18.060.978) (42.594.528) (14.173.019) Monetary gain / (loss) 46.847.062 13.989.990 19.103.631 5.096.190 Consolidated profit / (loss) before tax 41.367.343 11.537.304 40.787.986 17.868.566 30 September 2026 Fixed Line Mobile Eliminations Consolidated Total segment assets 492.162.266 213.712.608 (10.155.511) 695.719.363 Total segment liabilities (333.716.161) (85.150.686) 10.155.511 (408.711.336) Goodwill 334.675 808.486 − 1.143.161 Assets held for sale − 1.077.497 − 1.077.497 31 December 2025 Fixed Line Mobile Eliminations Consolidated Total segment assets 349.451.953 195.978.983 (15.020.274) 530.410.662 Total segment liabilities (233.132.136) (48.202.632) 15.020.274 (266.314.494) Goodwill 334.675 808.486 − 1.143.161 Assets held for sale − 1.077.497 − 1.077.497
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(Convenience translation of a report and financial statements originally issued in Turkish) TÜRK TELEKOMÜNİKASYON ANONİM ŞİRKETİ AND ITS SUBSIDIARIES NOTES TO THE INTERIM CONDENSED CONSOLIDATED FINANCIAL STATEMENTS AS AT AND FOR THE NINE MONTHS PERIOD ENDED 30 SEPTEMBER 2026 (All amounts disclosed in the consolidated financial statements and notes have been expressed in thousand currency units and are expressed in terms of purchasing power of Turkish Lira as of 3 0 September 2026 unless otherwise stated.) 21 Türk Telekom | Gizli | Kişisel Veri İçermez 6. CASH AND CASH EQUIVALENTS 30 September 2026 31 December 2025 Cash on hand 13.731 8.614 Cash at banks - demand deposit 3.647.940 4.325.785 Cash at banks - time deposit 16.181.172 7.527.652 Liquid fund (*) 10.574.710 71.358.044 30.417.553 83.220.095 (*) Consists of a highly liquid, short-term liquid fund with immaterial risk of change in fair value. As of 30 September 2026, time deposits are all short -term, maturing within one month and denominated in both foreign currencies and TL. The interest rates are between 5,50% and 40,25% for TL deposits, between 0,01% and 6,50% for USD deposits and between 0,01% and 3,60% for EUR deposits ( 31 December 202 5: for 5,50% and 39,25% for TL deposits, between 3,46% and 3,90% for USD deposits and between 0,01% and 2,15% for EUR deposits). Reconciliation of cash and cash equivalents to the statement of cash flows is as follows: 30 September 2026 30 September 2025 Cash and cash equivalents 30.417.553 18.843.850 Less: restricted amounts - Collection protocols and ATM collection (2.965.694) (2.646.169) Unrestricted cash 27.451.859 16.197.681 The Group classifies liquid fund amounts under cash and cash equivalents as they are easily convertible into cash and highly liquid assets that are not exposed to impairment loss. As of 30 September 2026, demand deposits amounting to TL 2.965.694 is restricted due to collection protocols signed with banks for receipts from the subscribers, under which proceeds are made available to the Group a certain number of days after the cash is collected. As of 30 September 2026, the Group maintains available credit line amounting to EUR 52.459 until 30 September 2027 and USD 110.286 until 2 January 2028.
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(Convenience translation of a report and financial statements originally issued in Turkish) TÜRK TELEKOMÜNİKASYON ANONİM ŞİRKETİ AND ITS SUBSIDIARIES NOTES TO THE INTERIM CONDENSED CONSOLIDATED FINANCIAL STATEMENTS AS AT AND FOR THE NINE MONTHS PERIOD ENDED 30 SEPTEMBER 2026 (All amounts disclosed in the consolidated financial statements and notes have been expressed in thousand currency units and are expressed in terms of purchasing power of Turkish Lira as of 3 0 September 2026 unless otherwise stated.) 22 Türk Telekom | Gizli | Kişisel Veri İçermez 7. FINANCIAL LIABILITIES Bank loans 30 September 2026 31 December 2025 Weighted average effective interest rate (%) Original amount TL equivalent Weighted average effective interest rate (%) Original amount TL equivalent Short-term bank loans: Unsecured TL bank loans with fixed interest rates 47,75 1.228.750 1.228.750 54,25 224.577 224.577 Unsecured EUR bank loans with fixed interest rates − − − 4,40 50.000 3.125.705 Unsecured EUR bank loans with variable interest rates 4,68 50.000 2.777.835 − − − Interest accruals of short-term bank loans: Unsecured TL bank loans with fixed interest rates 9.656 9.656 4.431 5.509 Unsecured EUR bank loans with fixed interest rates − − 361 22.540 Unsecured EUR bank loans with variable interest rates 403 22.380 − − Short-term bank loans 4.038.621 3.378.331 Short-term portion of long-term bank loans: Unsecured USD bank loans with variable interest rates (*) 3,69 44.438 2.174.358 4,99 136.548 7.273.164 Unsecured EUR bank loans with variable interest rates (**) 3,77 194.875 10.826.609 2,47 136.848 8.554.946 Interest accruals of long-term bank loans: Unsecured USD bank loans with variable interest rates (*) 6.716 328.639 1.694 90.221 Unsecured EUR bank loans with variable interest rates (**) 5.602 311.230 3.974 248.444 Current portion of long-term bank loans 13.640.836 16.166.775 Total short-term bank loans 17.679.457 19.545.106 Long-term bank loans: Unsecured USD bank loans with variable interest rates (*) 5,07 447.035 21.873.533 4,44 190.269 10.134.631 Unsecured EUR bank loans with variable interest rates (**) 3,80 411.653 22.870.085 3,15 439.444 27.471.460 Total long-term bank loans 44.743.618 37.606.091 Total bank loans 62.423.075 57.151.197 (*) As at 30 September 2026, interest rate varies between SOFR + 0,52% and 2,35% (31 December 2025: SOFR + 0,57% and 2,73%). (**) As at 30 September 2026, interest rate varies between Euribor + 0,25% and 2% (31 December 2025: Euribor + 0,25% and 1,5%).
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(Convenience translation of a report and financial statements originally issued in Turkish) TÜRK TELEKOMÜNİKASYON ANONİM ŞİRKETİ AND ITS SUBSIDIARIES NOTES TO THE INTERIM CONDENSED CONSOLIDATED FINANCIAL STATEMENTS AS AT AND FOR THE NINE MONTHS PERIOD ENDED 30 SEPTEMBER 2026 (All amounts disclosed in the consolidated financial statements and notes have been expressed in thousand currency units and are expressed in terms of purchasing power of Turkish Lira as of 30 September 2026 unless otherwise stated.) 23 Türk Telekom | Gizli | Kişisel Veri İçermez 7. FINANCIAL LIABILITIES (CONTINUED) Bank loans (continued) The details of the TL equivalents of bank loans according to their remaining maturities are as follows: 30 September 2026 31 December 2025 Up to 3 months 3 months to 1 year 1 year to 2 years 2 years to 5 years More than 5 years Total Up to 3 months 3 months to 1 year 1 year to 2 years 2 years to 5 years More than 5 years Total Unsecured TL bank loans with fixed interest rates 34.816 1.203.590 − − − 1.238.406 36.221 193.865 − − − 230.086 Unsecured USD bank loans with variable interest rates 942.926 1.560.071 2.171.104 16.560.507 3.141.922 24.376.530 496.860 6.866.525 1.729.494 6.610.249 1.794.888 17.498.016 Unsecured EUR bank loans with fixed interest rates − − − − − − 22.165 3.126.080 − − − 3.148.245 Unsecured EUR bank loans with variable interest rates 3.679.196 10.258.858 11.772.206 9.333.913 1.763.966 36.808.139 517.133 8.286.257 11.465.947 13.779.533 2.225.980 36.274.850 4.656.938 13.022.519 13.943.310 25.894.420 4.905.888 62.423.075 1.072.379 18.472.727 13.195.441 20.389.782 4.020.868 57.151.197
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(Convenience translation of a report and financial statements originally issued in Turkish) TÜRK TELEKOMÜNİKASYON ANONİM ŞİRKETİ AND ITS SUBSIDIARIES NOTES TO THE INTERIM CONDENSED CONSOLIDATED FINANCIAL STATEMENTS AS AT AND FOR THE NINE MONTHS PERIOD ENDED 30 SEPTEMBER 2026 (All amounts disclosed in the consolidated financial statements and notes have been expressed in thousand currency units and are expressed in terms of purchasing power of Turkish Lira as of 3 0 September 2026 unless otherwise stated.) 24 Türk Telekom | Gizli | Kişisel Veri İçermez 7. FINANCIAL LIABILITIES (CONTINUED) Issued debt instruments 30 September 2026 31 December 2025 Weighted average effective interest rate (%) Original amount TL equivalent Weighted average effective interest rate (%) Original amount TL equivalent Interest accruals of short-term portion of long- term issued debt instruments: USD issued debt instruments with fixed interest rates 34.504 1.688.278 15.108 804.712 Short-term issued debt instruments 1.688.278 804.712 Long-term issued debt instruments: USD issued debt instruments with fixed interest rates 7,34 1.096.293 53.641.947 7,34 1.096.293 58.393.652 Long-term issued debt instruments 53.641.947 58.393.652 Total issued debt instruments 55.330.225 59.198.364 The sales process of the bond issuances amounted to USD 500.000 with 5 years of maturity, and 7,375% coupon rate based on 7,5% reoffer yield was completed on 20 May 2024. The bonds are now quoted at Irish Stock Exchange. On 7 October 2025, a USD 600,000, 7-year, 6,95% coupon rate bond was issued. The bond was listed on the Irish Stock Exchange. The contractual maturities of issued long term bills, bonds and notes in equivalent of TL are as follows: 30 September 2026 31 December 2025 0 months to 3 months 2 years to 5 years More than 5 years Total 3 months to 12 months 2 years to 5 years More than 5 years Total USD issued debt instruments with fixed interest rates 1.688.278 24.346.305 29.295.642 55.330.225 804.712 26.502.945 31.890.707 59.198.364 1.688.278 24.346.305 29.295.642 55.330.225 804.712 26.502.945 31.890.707 59.198.364
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(Convenience translation of a report and financial statements originally issued in Turkish) TÜRK TELEKOMÜNİKASYON ANONİM ŞİRKETİ AND ITS SUBSIDIARIES NOTES TO THE INTERIM CONDENSED CONSOLIDATED FINANCIAL STATEMENTS AS AT AND FOR THE NINE MONTHS PERIOD ENDED 30 SEPTEMBER 2026 (All amounts disclosed in the consolidated financial statements and notes have been expressed in thousand currency units and are expressed in terms of purchasing power of Turkish Lira as of 3 0 September 2026 unless otherwise stated.) 25 Türk Telekom | Gizli | Kişisel Veri İçermez 7. FINANCIAL LIABILITIES (CONTINUED) Sukuk Issued 30 September 2026 31 December 2025 Weighted average profit rate (%) Original amount TL equivalent Weighted average profit rate (%) Original amount TL equivalent Profit accruals of short-term portion of long-term Sukuk issued: USD Sukuk issued with fixed profit rates 16.707 817.483 6.810 362.747 Short-term Sukuk issued 817.483 362.747 Long-term Sukuk issued: USD Sukuk issued with fixed profit rates 6,67 598.134 29.266.880 6,67 598.134 31.859.395 Long-term Sukuk issued debt instruments 29.266.880 31.859.395 Total Sukuk issued 30.084.363 32.222.142 On 28 October 2025, a USD 600,000, 5-year, 6,50% profit rate bond was issued. The bond was listed on the Irish Stock Exchange. The contractual maturities of issued long term bills, bonds and notes in equivalent of TL are as follows: 30 September 2026 31 December 2025 0 months to 3 months 4 years to 5 years Total 3 months to 12 months 4 years to 5 Years Total USD Sukuk issued with fixed profit rates 817.483 29.266.880 30.084.363 362.747 31.859.395 32.222.142 817.483 29.266.880 30.084.363 362.747 31.859.395 32.222.142 Lease liabilities As at 30 September 2026, obligation under leases detail are as follows: 30 September 2026 31 December 2025 Currency Interest rate type Nominal interest rate Carrying amount Nominal interest rate Carrying amount Lease liabilities TL Fixed 9% - 48% 5.479.091 9% - 48% 6.541.517 Lease liabilities EUR Fixed 3,3% - 7% 227.996 2,5% - 4,5% 146.978 Lease liabilities USD Fixed 7% - 8% 148.283 7,8% 81.826 Lease liabilities Other Fixed 3,3% 10.645 3,3% 16.804 5.866.015 6.787.125
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(Convenience translation of a report and financial statements originally issued in Turkish) TÜRK TELEKOMÜNİKASYON ANONİM ŞİRKETİ AND ITS SUBSIDIARIES NOTES TO THE INTERIM CONDENSED CONSOLIDATED FINANCIAL STATEMENTS AS AT AND FOR THE NINE MONTHS PERIOD ENDED 30 SEPTEMBER 2026 (All amounts disclosed in the consolidated financial statements and notes have been expressed in thousand currency units and are expressed in terms of purchasing power of Turkish Lira as of 3 0 September 2026 unless otherwise stated.) 26 Türk Telekom | Gizli | Kişisel Veri İçermez 8. DUE FROM AND DUE TO RELATED PARTIES All intra -group transactions and balances including intra -group unrealized profits and losses are eliminated for consolidation purposes and are not disclosed in this note. Institutions under state control are defined as related parties due to 25% ownership and the golden share of the Treasury and 61,68% ownership of Turkey Wealth Fund (“TWF”). State controlled entities are defined as related parties but in accordance with th e exemption provided by the TAS 24 disclosure requirements, state-controlled entities are excluded from general reporting requirements. The Group carries out transactions with many of these institutions in line with its peers. Banking transactions such as loans and deposits with banks under the control of the Turkey Wealth Fund or in which it has significant influence are also carried out in accordance with their peers. Other transactions consist of corporate tax, value added tax, special communication tax, treasury share and regulatory fees such as fees. Details of balances and transactions between the Group and other related parties as at 3 0 September 2026 and 31 December 2025 are disclosed below: 30 September 2026 31 December 2025 Short-term due from related parties (Trade receivables) Other 1.280.555 1.359.344 1.280.555 1.359.344 30 September 2026 31 December 2025 Short-term due to related parties (Trade payables) Other 1.080.962 551.590 1.080.962 551.590 Deposits held by related parties 30 September 2026 31 December 2025 Time Deposit T.C. Ziraat Bankası A.Ş. 6.795.811 440.009 Türkiye Vakıflar Bankası Türk Anonim Ortaklığı 4.522.482 2.267.271 Türkiye Halk Bankası A.Ş. 312.093 818.551 Other 1.601.766 863.553 Demand Deposit Türkiye Halk Bankası A.Ş. 161.092 403.198 T.C. Ziraat Bankası A.Ş. 50.821 62.155 Türkiye Vakıflar Bankası Türk Anonim Ortaklığı 17.864 232.461 Other 969 1.786 13.462.898 5.088.984 Bank loans from related parties 30 September 2026 31 December 2025 Türkiye Halk Bankası A.Ş. 287.250 39.781 T.C. Ziraat Bankası A.Ş. 144.000 109.586 431.250 149.367 Transactions with shareholders: TT Mobil is required under the terms of the TT Mobil Concession Agreement, to pay 15% share to the Treasury (the Treasury Share) of its monthly gross revenue. Besides, the Company and its other subsidiaries that are operating in the telecommunications sector are required to pay universal service fund at 1% of their net revenues of each year and ICTA share at 0,35% of revenues to the Ministry of Transport, Maritime Affairs and Communications under the law Global Service Act numbered 5369. Also, according to Law numbered 7061 "Legislation on Amendment of Certain Tax Legislation and Other Certain Legislation published in the Official Gazette dated 5 December 2017 and numbered 30261, TT Mobil is requi red to pay 5% share (radio fee) of its monthly net revenue to ICTA.
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(Convenience translation of a report and financial statements originally issued in Turkish) TÜRK TELEKOMÜNİKASYON ANONİM ŞİRKETİ AND ITS SUBSIDIARIES NOTES TO THE INTERIM CONDENSED CONSOLIDATED FINANCIAL STATEMENTS AS AT AND FOR THE NINE MONTHS PERIOD ENDED 30 SEPTEMBER 2026 (All amounts disclosed in the consolidated financial statements and notes have been expressed in thousand currency units and are expressed in terms of purchasing power of Turkish Lira as of 3 0 September 2026 unless otherwise stated.) 27 Türk Telekom | Gizli | Kişisel Veri İçermez 8. DUE FROM AND DUE TO RELATED PARTIES (CONTINUED) As of 30 September 2026, unpaid portion of Treasury Share, license and concession debts payable to ICTA and universal service fund are recorded under other short and long term payables. Expenses related to contributions and Treasury contributions are accounted in cost of sales account. Transactions with related parties: Interest income from related parties 1 January - 30 September 2026 1 January - 30 September 2025 Türkiye Halk Bankası A.Ş. 144.343 113.005 Türkiye Vakıflar Bankası Türk Anonim Ortaklığı 53.214 108.017 T.C. Ziraat Bankası A.Ş. 45.785 87.539 Ziraat Katılım Bankası A.Ş. − 806 243.342 309.367 Interest expense from related parties Türkiye Halk Bankası A.Ş. 50.076 9.939 T.C. Ziraat Bankası A.Ş. 46.134 79.052 Türkiye Vakıflar Bankası Türk Anonim Ortaklığı − 333.543 Ziraat Katılım Bankası A.Ş. − 39.240 96.210 461.774 Income from related parties 1 January - 30 September 2026 1 January - 30 September 2025 Superonline İletişim Hizmetleri A.Ş. 2.809.199 2.811.808 Türksat Uydu Haberleşme Kablo TV ve İşletme A.Ş. 2.792.251 1.367.879 Turkcell İletişim Hizmetleri A.Ş. 1.540.725 1.543.678 THY A.O. 495.269 689.362 Türkiye Vakıflar Bankası Türk Anonim Ortaklığı 237.501 319.968 T.C. Ziraat Bankası A.Ş. 209.120 430.550 Türkiye Halk Bankası A.Ş. 192.676 248.605 Botaş Boru Hatları ile Petrol Taşıma A.Ş. 3.223 40.201 Other (*) 947.923 791.363 9.227.887 8.243.414 Expenses from related parties 1 January - 30 September 2026 1 January - 30 September 2025 Turkcell İletişim Hizmetleri A.Ş. 1.258.286 1.430.908 PTT A.Ş. 1.105.348 1.206.369 THY A.O. 447.775 338.378 Türksat Uydu Haberleşme Kablo TV ve İşletme A.Ş. 215.490 300.792 Kule Hizmet ve İşletmecilik A.Ş. 187.501 157.490 Other (*) 283.742 323.801 3.498.142 3.757.738 (*) The Group generates revenues from related parties by providing fixed voice, corporate data, mobile and internet services. The Group’s related party expenses consist of energy, call termination, billing and content, satellite frequency-base services.
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(Convenience translation of a report and financial statements originally issued in Turkish) TÜRK TELEKOMÜNİKASYON ANONİM ŞİRKETİ AND ITS SUBSIDIARIES NOTES TO THE INTERIM CONDENSED CONSOLIDATED FINANCIAL STATEMENTS AS AT AND FOR THE NINE MONTHS PERIOD ENDED 30 SEPTEMBER 2026 (All amounts disclosed in the consolidated financial statements and notes have been expressed in thousand currency units and are expressed in terms of purchasing power of Turkish Lira as of 3 0 September 2026 unless otherwise stated.) 28 Türk Telekom | Gizli | Kişisel Veri İçermez 8. DUE FROM AND DUE TO RELATED PARTIES (CONTINUED) Compensation of key management personnel The remuneration of board of directors and other members of key management were as follows: 1 January - 30 September 2026 1 January - 30 September 2025 Short-term benefits 1.021.822 717.764 Long-term benefits 23.656 12.825 1.045.478 730.589 Key management personnel comprise the Group’s members of Board of Directors and top managers. 9. TRADE RECEIVABLES FROM AND PAYABLES TO UNRELATED PARTIES Trade receivables 30 September 2026 31 December 2025 Short-term Trade receivables 48.719.765 42.773.267 Other trade receivables (*) 1.601.849 1.437.547 Allowance for doubtful receivables (-) (5.339.597) (5.483.845) Total short-term trade receivables 44.982.017 38.726.969 Long-term Trade receivables 221.515 338.004 Total long-term trade receivables 221.515 338.004 (*) Other trade receivables mainly consist of corporate project receivables. Trade receivables generally have a maturity term of 60 days on average (31 December 202 5: 60 days). The movement of the allowance for doubtful receivables is as follows: 1 January - 30 September 2026 1 January - 30 September 2025 At January 1 (5.483.845) (6.086.451) Provision for the year (1.007.997) (992.049) Receivables written off 16.736 7.838 Change in currency translation differences 50.331 (11.108) Inflation effect 1.085.178 1.284.159 At 30 September (5.339.597) (5.797.611) The Group waits up to 90 days before initiating legal action for overdue receivables. Based on its previous collection performance from overdue receivables, the Company expects to make significant collections from its overdue receivables. Receivables guaranteed of the Group are amounted to TL 3.270.237 (31 December 2025: TL 544.155).
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(Convenience translation of a report and financial statements originally issued in Turkish) TÜRK TELEKOMÜNİKASYON ANONİM ŞİRKETİ AND ITS SUBSIDIARIES NOTES TO THE INTERIM CONDENSED CONSOLIDATED FINANCIAL STATEMENTS AS AT AND FOR THE NINE MONTHS PERIOD ENDED 30 SEPTEMBER 2026 (All amounts disclosed in the consolidated financial statements and notes have been expressed in thousand currency units and are expressed in terms of purchasing power of Turkish Lira as of 3 0 September 2026 unless otherwise stated.) 29 Türk Telekom | Gizli | Kişisel Veri İçermez 9. TRADE RECEIVABLES FROM AND PAYABLES TO UNRELATED PARTIES (CONTINIUED) Contract assets 30 September 2026 31 December 2025 Short-term Contract assets from sale of goods and service contracts 10.750.097 9.346.050 10.750.097 9.346.050 Long-term Contract assets from sale of goods and service contracts 28.259 90.692 28.259 90.692 The contract assets represent contract assets from subscribers. Due to the high volume of subscribers, different billing period are available, an accrual is made at the end of each reporting period to accrue revenue for services rendered but not billed. In addition, income an accrual is made for the not billed of the contributions services. As of the reporting period, the portion of the accrued income to be invoiced one year later is presented in the long term contract assets. Trade payables 30 September 2026 31 December 2025 Short-term Trade payables 30.185.812 30.089.704 Expense accruals 10.582.705 8.263.547 Total short-term trade payables 40.768.517 38.353.251 The average maturity term of trade payables is between 30 and 150 days ( 31 December 202 5: 30 and 150 days). As of 30 September 2026, there is no trade payables consist of payables within scope of supplier finance (31 December 2025: TL 2.142). 10. OTHER PAYABLES Other short term payables Short term other payables 30 September 2026 31 December 2025 Concession and license payables to ICTA (**) 62.576.753 1.063.145 Taxes and duties payable 3.318.423 4.260.614 Treasury share accruals 1.977.171 1.825.593 ICTA shares 1.961.847 2.131.148 Universal Service Fund (*) 1.545.999 1.790.309 Other payables 469.670 320.860 Total short-term other payables 71.849.863 11.391.669 (*) According to the article numbered 5369 related with “International Service Fund” published on 16 June 2005, Türk Telekom and TTNet will contribute 1% of their net revenues of each year to the Ministry of Transportation and Infrastructure as Universal S ervice Fund. The contribution is payable by the end of April of the following year.
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(Convenience translation of a report and financial statements originally issued in Turkish) TÜRK TELEKOMÜNİKASYON ANONİM ŞİRKETİ AND ITS SUBSIDIARIES NOTES TO THE INTERIM CONDENSED CONSOLIDATED FINANCIAL STATEMENTS AS AT AND FOR THE NINE MONTHS PERIOD ENDED 30 SEPTEMBER 2026 (All amounts disclosed in the consolidated financial statements and notes have been expressed in thousand currency units and are expressed in terms of purchasing power of Turkish Lira as of 3 0 September 2026 unless otherwise stated.) 30 Türk Telekom | Gizli | Kişisel Veri İçermez 10. OTHER PAYABLES (CONTINIUED) Other long term payables Long term other payables 30 September 2026 31 December 2025 Concession and license payables to ICTA (**) 73.175.158 1.049.799 Deposits and guarantees received 140.388 436.290 Other payables 4.052 2.000 Total long-term other payables 73.319.598 1.488.089 (**) It consists of discounted amounts of debts payable to ICTA under the concession extension agreement and the mobile 5G license contract. In the current period, exchange rate differences o f TL 15.300.854 and discount expenses of TL 4.386.778 for these debts have been reflected in the profit and loss statement. 11. TANGIBLE AND INTANGIBLE ASSETS The amount of tangible and intangible assets purchased during the nine months period ended 30 September 2026 is TL 228.050.760 (30 September 2025: TL 58.496.945). The significant portion of current period purchases consists of TL 99.407.189 capitalized under concession rights arising from the extension of the Concession Agreement and TL 56.591.066 capitalized under licenses arising from the 5G license tender. The Group recognized 5G license after the issuance of the Authorization Certificate by ICTA on 2 January 2026. Although the Group was declared as a successful bidder in 5G license tender completed in October 2025, the tender result did not provide an unconditional right to use 5G license. Prior to issuance of the Authorization Certificate, the Group was required to satisfy regulatory and contractual requirements including payment of VAT, and ICTA retained the right to cancel the license until these require ments were satisfied. On 2 January 2026, the Group satisfied the requirements, received the Authorization Certificate, obtained irrevocable right to use 5G license, and recognized 5G license. 5G services launched on 1 April 2026. Since 5G license cannot be used without network equipment, both license and network equipment were considered as a single component and qualifying asset. Therefore, TL 434.898 borrowing cost until 1 April 2026 was capitalized during the period in which 5G license was being prepared to its intended use. The amortization and depreciation regarding to 5G started to be recognized in April 2026. The Group recognized concession rights arising from the extension of the Concession Agreement. The extension agreement constitutes an extension of the initial Concession Agreement. Therefore, since the Group continues to control and utilize the economic benefits arising from the Concession Agreement, the extension fee at USD 2 ,5 billion was recognized as of the signing date of extension agreement. Since there is no substantial period of time for the license arising from extension fee to prepare it to its intended use, borrowing costs were not capitalized. Both purchases for concession right and 5G license were made on a deferred basis. Therefore, concession right and 5G license were initially measured at the present value of the contractual obligations. VAT payments at TL 31.476.521 related to both 5G license and concession agreement were made in January and March 2026 respectively, and were recognized under other current assets when paid. Net book value of tangible and intangible assets sold during the nine months period ended 30 September 2026 amounted to TL 488.238 (30 September 2025: TL 172.933).
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(Convenience translation of a report and financial statements originally issued in Turkish) TÜRK TELEKOMÜNİKASYON ANONİM ŞİRKETİ AND ITS SUBSIDIARIES NOTES TO THE INTERIM CONDENSED CONSOLIDATED FINANCIAL STATEMENTS AS AT AND FOR THE NINE MONTHS PERIOD ENDED 30 SEPTEMBER 2026 (All amounts disclosed in the consolidated financial statements and notes have been expressed in thousand currency units and are expressed in terms of purchasing power of Turkish Lira as of 3 0 September 2026 unless otherwise stated.) 31 Türk Telekom | Gizli | Kişisel Veri İçermez 12. PROVISIONS Other current provisions Provisions for short-term debt for the years 30 September 2026 and 31 December 2025 are as follows: 30 September 2026 31 December 2025 Litigation, ICTA penalty and customer return provisions (*) 488.842 682.253 Provision for expected credit losses on loan commitments (**) 19.150 14.525 507.992 696.778 (*) TT Mobil tax inspection consists of the Ministry of Commerce fine, ICTA fines, refunds and other litigation provisions required by ICTA decisions. Detailed explanations are given in Note 13. (**) Consists of expected credit losses are recognized for the guarantees given for borrowings of distributors which are utilized in financing of equipment purchases that will be sold to Group’s customers as part of commitment sales. Current provisions for employee benefits 30 September 2026 31 December 2025 Short term provisions for employee benefits Personnel bonus provision 2.900.052 4.303.757 2.900.052 4.303.757 Non-current provisions for employee benefits 30 September 2026 31 December 2025 Long term provisions for employee benefits Defined benefit obligation 10.622.214 10.014.160 Unused vacation provisions 1.827.898 2.045.600 12.450.112 12.059.760 Defined benefit obligation In accordance with existing social legislation in Turkey, companies are required to make lump -sum payments to employees whose employment has ended due to retirement or for reasons other than resignation or misconduct. The liability is not funded and accordingly there are no plan assets for the defined benefits as there is no funding requirement. The retirement pay liability as at 3 0 September 2026 is subject to a ceiling of full TL 73.729,87 (31 December 2025: full TL 53.919,68) per monthly salary for each service year.
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(Convenience translation of a report and financial statements originally issued in Turkish) TÜRK TELEKOMÜNİKASYON ANONİM ŞİRKETİ AND ITS SUBSIDIARIES NOTES TO THE INTERIM CONDENSED CONSOLIDATED FINANCIAL STATEMENTS AS AT AND FOR THE NINE MONTHS PERIOD ENDED 30 SEPTEMBER 2026 (All amounts disclosed in the consolidated financial statements and notes have been expressed in thousand currency units and are expressed in terms of purchasing power of Turkish Lira as of 3 0 September 2026 unless otherwise stated.) 32 Türk Telekom | Gizli | Kişisel Veri İçermez 13. COMMITMENTS AND CONTINGENCIES Guarantees received and given by the Group are summarized below: 30 September 2026 31 December 2025 Original currency TL Original currency TL Guarantees received TL 13.763.644 13.763.644 8.751.396 8.751.396 USD 161.821 7.917.950 111.175 5.921.699 EUR 56.965 3.164.787 22.046 1.378.203 GBP − − 3 215 24.846.381 16.051.513 Guarantees given (*) USD 297.062 14.535.333 372.419 19.836.750 TL 7.518.426 7.518.426 6.027.535 6.027.535 EUR 76.385 4.243.699 76.104 4.757.545 26.297.458 30.621.830 (*) Guarantees given amounting to USD 151.500 (31 December 2025: USD 151.500) is related to the guarantee provided to the ICTA by TT Mobil with respect to the TT Mobil Concession Agreement, guarantees given amounting to USD 65.640 (31 December 202 5: USD 171.890 ) is related with the guarantee provided for 5G license, guarantees given amounting to EUR 12.840 (31 December 202 5: EUR 12.840) is related with the guarantee provided for 3G license, guarantees given amounting to EUR 57.281 (31 December 2025: EUR 57.281) is related with the guarantee provided for 4.5G license and guarantees given amounting to EUR 4.030 (31 December 2025: EUR 4.030) is relate to the extension with the guarantee provided for 2G license contract. The Company’s guarantee, pledge and mortgage (GPM) position as at 30 September 2026 and 31 December 2025 is as follows: GPMs given by the company 30 September 2026 31 December 2025 A. GPMs given on behalf of the Company’s legal personality 26.297.458 30.621.830 B. GPMs given in favour of subsidiaries included in full consolidation 7.995.012 3.303.254 Total 34.292.470 33.925.084 Other commitments The Group has purchase commitments for sponsorships, advertising and insurance services at the equivalent to TL 447.479 (31 December 202 5: TL 1.010.603) as at 3 0 September 2026. Payments for these commitments are going to be made in a 2-year period. The Group has purchase commitments for fixed assets amounting to TL 3.635.087, USD 151.785, EUR 76.749, GBP 379 and equivalent to TL 15.350.445 (31 December 202 5: TL 5.321.788) as at 3 0 September 2026. Additionally, according to the Agreement on the Provision of Electronic Communication Services, which was extended by the ICTA until 28 February 2050, there is a commitment to invest a total of USD 17.000.000, with a minimum investment of USD 300.000 per year until the end of the concession period. Since the relevant agreement is not an onerous contract under IAS 37 and the commitments are dependent to the group future operations, no provision has been recognized for these commitments in the consolidated financial statements.
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(Convenience translation of a report and financial statements originally issued in Turkish) TÜRK TELEKOMÜNİKASYON ANONİM ŞİRKETİ AND ITS SUBSIDIARIES NOTES TO THE INTERIM CONDENSED CONSOLIDATED FINANCIAL STATEMENTS AS AT AND FOR THE NINE MONTHS PERIOD ENDED 30 SEPTEMBER 2026 (All amounts disclosed in the consolidated financial statements and notes have been expressed in thousand currency units and are expressed in terms of purchasing power of Turkish Lira as of 3 0 September 2026 unless otherwise stated.) 33 Türk Telekom | Gizli | Kişisel Veri İçermez 13. COMMITMENTS AND CONTINGENCIES (CONTINUED) Legal proceedings of Türk Telekom Disputes between the Group and the ICTA The Company has filed various lawsuits against ICTA. These lawsuits are related with the sector-specific and tariff legislations and legislations with respect to the other operators in the market. The sector-specific disputes generally stem from the objections with respect to the provisions of interconnection legislation, legislation with resp ect to telecommunication services and infrastructure. According to the Article 99 of the Law numbered 7061 “Legislation on Amendment of Certain Tax Legislation and Other Certain Legislation” which was published on the Official Gazette numbered 30261 on 5 December 2017 and according to the sub-article 9 added to the Article 60 of the Law numbered 5809; customer returns that are not repaid to the customers within the 2-year period, shall be transferred to the Ministry of Transport and Infrastructure of the Republic of Turkey as revenue under the name of “Revenue s for Universal Service”. As of 3 0 September 2026, TL 137.255 provision provided for ICTA penalties and amounts to be repaid to customers or to the Ministry of Transport and Infrastructure of the Republic of Turkey due to ICTA resolutions (31 December 202 5: TL 380.514). Other issues Provision has been provided in the consolidated financial statements for the probable court cases against the Group based on the lawyers’ assessments. The provision for such court cases is amounting to TL 351.587 as at 30 September 2026 (31 December 2025: TL 301.739). According to management's assessment, no provisions have been provide in the consolidated financial statements because it is unlikely that any resources with significant economic benefits will be withdrawn from the entity in relation to the remaining various lawsuits, investigations, and reviews.
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(Convenience translation of a report and financial statements originally issued in Turkish) TÜRK TELEKOMÜNİKASYON ANONİM ŞİRKETİ AND ITS SUBSIDIARIES NOTES TO THE INTERIM CONDENSED CONSOLIDATED FINANCIAL STATEMENTS AS AT AND FOR THE NINE MONTHS PERIOD ENDED 30 SEPTEMBER 2026 (All amounts disclosed in the consolidated financial statements and notes have been expressed in thousand currency units and are expressed in terms of purchasing power of Turkish Lira as of 30 September 2026 unless otherwise stated.) 34 Türk Telekom | Gizli | Kişisel Veri İçermez 14. FINANCIAL RISK MANAGEMENT AND POLICIES Market risk Foreign currency risk 30 September 2026 31 December 2025 Total TL Equivalent USD EUR Other Total TL Equivalent USD EUR Other 1. Trade receivables 9.566.322 165.466 23.099 186.717 8.132.862 163.192 18.706 200.138 2a. Monetary financial assets (Cash and banks accounts included) 14.572.823 272.891 15.511 358.445 5.102.432 72.048 32.531 379.634 2b. Financial Investments − − − − − − − − 2c. Non-monetary financial assets − − − − − − − − 3. Other 2.886.154 58.985 − − 40.489 945 − − 4. Current assets (1+2+3) 27.025.299 497.342 38.610 545.162 13.275.783 236.185 51.237 579.772 5. Trade receivables − − − − − − − − 6a. Monetary financial assets − − − − − − − − 6b. Non-monetary financial assets − − − − − − − − 7. Other 6.067 15 96 − 6.798 19 119 − 8. Non-current assets (5+6+7) 6.067 15 96 − 6.798 19 119 − 9. Total assets (4+8) 27.031.366 497.357 38.706 545.162 13.282.581 236.204 51.356 579.772 10. Trade payables 22.031.883 254.457 170.233 123.642 27.035.677 427.926 169.048 200.157 11. Financial liabilities 19.227.111 105.226 252.657 41.582 20.635.124 201.016 238.257 41.485 12a. Monetary other liabilities 45.485.414 928.623 857 - − − − − 12b. Non-monetary other liabilities 1.871.673 38.245 6 - 1.184.693 27.642 7 − 13. Short-term liabilities (10+11+12) 88.616.081 1.326.551 423.753 165.224 48.855.494 656.584 407.312 241.642 14. Trade payables − − − − − − − − 15. Financial liabilities 127.752.674 2.141.632 412.355 52.895 127.973.735 2.343.005 547.417 58.689 16a. Monetary other liabilities 91.412.217 1.848.880 17.027 − − − − − 16b. Non-monetary other liabilities − − − − − − − − 17. Long-term liabilities (14+15+16) 219.164.891 3.990.512 429.382 52.895 127.973.735 2.343.005 547.417 58.689 18. Total liabilities (13+17) 307.780.972 5.317.063 853.135 218.119 176.829.229 2.999.589 954.729 300.331 19. Net asset / (liability) position of off-balance sheet derivative instruments (19a-19b) 114.986.205 2.350.000 − − 150.251.915 2.834.851 572.541 − 19a. Total asset amount hedged − − − − − − − − 19b. Total liability amount hedged (114.986.205) (2.350.000) − − (150.251.915) (2.834.851) (572.541) − 20. Loans defined as hedging instruments (*) 8.333.505 − 150.000 − 9.377.113 − 186.476 − 21. Net foreign currency asset / (liability) position (9-18+19+20) (157.429.896) (2.469.706) (664.429) 327.043 (3.917.620) 71.466 (144.356) 279.441 22. Net asset / (liability) position of foreign currency monetary items (IFRS 7.B23) (=1+2a+2b+5+6a-10-11-12a-14-15-16a) (281.770.154) (4.840.461) (814.519) 327.043 (162.409.242) (2.736.707) (903.485) 279.441 (*) The Company utilized a loan amounting to EUR 150.000 in order to hedge its net investment in a foreign operation with a EUR functional currency. Foreign exchange gain and/or loss resulting from the subsidiary’s net investment portion of this loan is reclassified to reserve for hedge of net i nvestment in a foreign operation under equity.
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(Convenience translation of a report and financial statements originally issued in Turkish) TÜRK TELEKOMÜNİKASYON ANONİM ŞİRKETİ AND ITS SUBSIDIARIES NOTES TO THE INTERIM CONDENSED CONSOLIDATED FINANCIAL STATEMENTS AS AT AND FOR THE NINE MONTHS PERIOD ENDED 30 SEPTEMBER 2026 (All amounts disclosed in the consolidated financial statements and notes have been expressed in thousand currency units and are expressed in terms of purchasing power of Turkish Lira as of 30 September 2026 unless otherwise stated.) 35 Türk Telekom | Gizli | Kişisel Veri İçermez 14. FINANCIAL RISK MANAGEMENT AND POLICIES (CONTINUED) Market risk (continued) Foreign currency risk (continued) The Group has transactional currency exposures mainly with respect to the bank borrowings and trade payables . Foreign currency denominated borrowings are stated in Note 7. The following table demonstrates the sensitivity to a reasonably possible change in the USD and EUR exchange rate, with all other variables held constant, of the Group’s profit before tax for the year (due to changes in the fair value of monetary assets and liabilities): 30 September 2026 Profit/Loss Other comprehensive income Appreciation of foreign currency Depreciation of foreign currency Appreciation of foreign currency Depreciation of foreign currency Appreciation of USD against TL by 10%: 1- USD net asset/liability (23.582.965) 23.582.965 − − 2- Hedged portion of USD risk (-) 11.498.621 (11.498.621) (183.466) 183.467 3- USD net effect (1+2) (12.084.344) 12.084.344 (183.466) 183.467 Appreciation of EUR against TL by 10%: 4- EUR net asset/liability (4.524.695) 4.524.695 − − 5- Hedged portion of EUR risk (-) 833.351 (833.351) − − 6- EUR net effect (4+5) (3.691.344) 3.691.344 − − Appreciation of other foreign currencies against TL by 10%: 7- Other foreign currency net asset/liability 32.704 (32.704) − − 8- Hedged portion of other foreign currency (-) − − − − 9- Other foreign currency net effect (7+8) 32.704 (32.704) − − Total (3+6+9) (15.742.984) 15.742.984 (183.466) 183.467 31 December 2025 Profit/Loss Other comprehensive income Appreciation of foreign currency Depreciation of foreign currency Appreciation of foreign currency Depreciation of foreign currency Appreciation of USD against TL by 10%: 1- USD net asset/liability (11.839.918) 11.839.918 − − 2- Hedged portion of USD risk (-) 11.996.917 (12.128.358) (115.030) 101.841 3- USD net effect (1+2) 156.999 (288.440) (115.030) 101.841 Appreciation of EUR against TL by 10%: 4- EUR net asset/liability (4.542.690) 4.542.690 − − 5- Hedged portion of EUR risk (-) 3.724.755 (3.824.609) (216.763) 111.166 6- EUR net effect (4+5) (817.935) 718.081 (216.763) 111.166 Appreciation of other foreign currencies against TL by 10%: 7- Other foreign currency net asset/liability 27.943 (27.943) − − 8- Hedged portion of other foreign currency (-) − − − − 9- Other foreign currency net effect (7+8) 27.943 (27.943) − − Total (3+6+9) (632.993) 401.698 (331.793) 213.007
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(Convenience translation of a report and financial statements originally issued in Turkish) TÜRK TELEKOMÜNİKASYON ANONİM ŞİRKETİ AND ITS SUBSIDIARIES NOTES TO THE INTERIM CONDENSED CONSOLIDATED FINANCIAL STATEMENTS AS AT AND FOR THE NINE MONTHS PERIOD ENDED 30 SEPTEMBER 2026 (All amounts disclosed in the consolidated financial statements and notes have been expressed in thousand currency units and are expressed in terms of purchasing power of Turkish Lira as of 30 September 2026 unless otherwise stated.) 36 Türk Telekom | Gizli | Kişisel Veri İçermez 14. FINANCIAL RISK MANAGEMENT AND POLICIES (CONTINUED) Explanation on the presentation of financial assets and liabilities at their fair values The below table summarizes the carrying amounts and fair values of financial asset and liabilities in the Group’s consolidated financial statements. Due to their short -term nature, the fair value of trade and other receivables represents their book value. The fair value of borrowings with fixed interests is obtained by calculating their discounted cash flows using the market interest rate effective at the reporting date. The fair value of foreign currency denominated borrowings with variable interests is obtained by discounting the projected cash flows using estimated market interest rates. Carrying amount Fair value 30 September 2026 31 December 2025 30 September 2026 31 December 2025 Financial assets Cash and cash equivalents (*) 30.417.553 83.220.095 30.417.553 83.220.095 Trade and other receivables (Including related parties) 59.447.602 51.296.326 59.447.602 51.296.326 Financial investments 1.085.938 1.041.940 1.085.938 (**) 1.041.940 (**) Derivative financial assets 482.008 509.686 482.008 509.686 Financial liabilities Bank borrowings 62.423.075 57.151.197 62.423.075 57.151.197 Issued debt instruments 85.414.588 91.420.506 82.845.928 93.489.779 Trade and other payables (Including related parties) 187.018.940 51.784.599 187.018.940 51.784.599 Derivative financial liabilities 1.354.977 2.586.395 1.354.977 2.586.395 (*) Liquid funds included in cash and cash equivalents are carried at fair value. (**) Group’s share of equity-based financial investments are carried at cost. Information on fair value of share in these investments are not available, currency protected time deposits and other financial investments are carried at fair value. Fair value hierarchy table The group classifies the fair value measurement of each class of financial instruments according to the source, using the three-level hierarchy, as follows: Level 1: Market price valuation techniques for the determined financial instruments traded in markets (unadjusted) Level 2: Other valuation techniques include direct or indirect observable inputs Level 3: Valuation techniques does not contain observable market inputs
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(Convenience translation of a report and financial statements originally issued in Turkish) TÜRK TELEKOMÜNİKASYON ANONİM ŞİRKETİ AND ITS SUBSIDIARIES NOTES TO THE INTERIM CONDENSED CONSOLIDATED FINANCIAL STATEMENTS AS AT AND FOR THE NINE MONTHS PERIOD ENDED 30 SEPTEMBER 2026 (All amounts disclosed in the consolidated financial statements and notes have been expressed in thousand currency units and are expressed in terms of purchasing power of Turkish Lira as of 30 September 2026 unless otherwise stated.) 37 Türk Telekom | Gizli | Kişisel Veri İçermez 14. FINANCIAL RISK MANAGEMENT AND POLICIES (CONTINUED) Fair value hierarchy table (continued) Fair value hierarchy table as at 30 September 2026 is as follows: Fair Value Measurement Date of valuation Total Quoted prices in active markets (Level 1) Significant observable inputs (Level 2) Significant unobservable inputs (Level 3) Financial assets measured at fair value: Derivative financial assets: Cross currency swaps (*) 30 September 2026 482.008 − 482.008 − Other financial assets: Money market fund 30 September 2026 10.202 − 10.202 − Liquid fund (**) 30 September 2026 10.574.710 10.574.710 − − Financial liabilities measured at fair value: Derivative financial liabilities: Cross currency swaps (*) 30 September 2026 1.354.977 − 1.354.977 − Other financial liabilities not measured at fair value: Bank loans 30 September 2026 62.423.075 − 62.423.075 − Issued debt instruments 30 September 2026 82.845.928 82.845.928 − − (*) Cross currency swaps consist of forwards and foreign currency swaps. (**) These are liquid funds with low risk and the possibility of value change and do not qualify as derivative assets. The Group specifies the fair value measurement of futures according to the forward exchange rates at the balance sheet date, whereas fair values of cross currency swaps are measured according to the net present value of the estimated future cash flows based on observable yield curves, measurement methods of fair value for derivative financial instruments and issued debt instruments are explained in Note 2.1. Fair value hierarchy table as at 31 December 2025 is as follows: Fair Value Measurement Date of valuation Total Quoted prices in active markets (Level 1) Significant observable inputs (Level 2) Significant unobservable inputs (Level 3) Financial assets measured at fair value: Derivative Financial Assets: Cross currency swaps (*) 31 December 2025 509.686 − 509.686 − Other financial assets: Liquid fund (**) 31 December 2025 71.358.044 71.358.044 − − Financial liabilities measured at fair value: Derivative Financial Liabilities: Cross currency swaps (*) 31 December 2025 2.581.630 − 2.581.630 − Forward foreign exchange contracts 31 December 2025 4.765 − 4.765 − Other financial liabilities not measured at fair value: Bank loans 31 December 2025 57.151.197 − 57.151.197 − Issued debt instruments 31 December 2025 93.489.779 93.489.779 − − (*) Cross currency swaps consist of forwards and foreign currency swaps. (**) These are liquid funds with low risk and the possibility of value change and do not qualify as derivative assets.
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(Convenience translation of a report and financial statements originally issued in Turkish) TÜRK TELEKOMÜNİKASYON ANONİM ŞİRKETİ AND ITS SUBSIDIARIES NOTES TO THE INTERIM CONDENSED CONSOLIDATED FINANCIAL STATEMENTS AS AT AND FOR THE NINE MONTHS PERIOD ENDED 30 SEPTEMBER 2026 (All amounts disclosed in the consolidated financial statements and notes have been expressed in thousand currency units and are expressed in terms of purchasing power of Turkish Lira as of 30 September 2026 unless otherwise stated.) 38 Türk Telekom | Gizli | Kişisel Veri İçermez 14. FINANCIAL RISK MANAGEMENT AND POLICIES (CONTINUED) Capital management policies The primary objective of the Group’s capital management is to ensure that it maintains a strong credit rating and healthy capital ratios in order to support its business and maximize shareholder value. The Group manages its capital structure and makes adjustments to it in light of changes in economic conditions. To maintain or adjust the capital structure, the Group may adjust the dividend payment to shareholders or return capital to shareholders. No changes were made in the objectives, policies or processes during the years 202 6 and 2025. 15. DERIVATIVE FINANCIAL INSTRUMENTS As of 30 September 2026, and 31 December 2025, the fair values of derivative instruments are as follows: 30 September 2026 31 December 2025 Asset Liability Asset Liability Derivative transactions which are not designated as cash flow hedge 482.008 1.340.414 13.768 2.586.395 Derivative transactions which are designated as cash flow hedge − 14.563 495.918 − Total 482.008 1.354.977 509.686 2.586.395 Derivative transactions which are designated as cash flow hedge The periods in which the cash flows related to the hedged item affect profit or loss, accumulated gain/loss of related hedged instruments in equity are reclassified in the statement of profit or loss. As of the nine months period ended 30 September 2026, TL 579.709 including tax effect, are reclassified to financial expenses in the statement of profit or loss from gain on cash flow hedges in equity. As of 30 September 2026, fair value of participating cross currency transactions amounting to TL 14.563 has been recognized under short term derivative financial liabilities (31 December 2025: TL 495.918 short term derivative financial assets). 30 September 2026 31 December 2025 Currency Maturity Nominal contract amount (Original currency) Fair Value Maturity Nominal contract amount (Original currency) Fair Value Cross currency transactions US Dollar October 2032 150.000 (14.563) May 2026 100.000 333.655 Euro − − − July 2026 90.000 162.263 (14.563) 495.918
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(Convenience translation of a report and financial statements originally issued in Turkish) TÜRK TELEKOMÜNİKASYON ANONİM ŞİRKETİ AND ITS SUBSIDIARIES NOTES TO THE INTERIM CONDENSED CONSOLIDATED FINANCIAL STATEMENTS AS AT AND FOR THE NINE MONTHS PERIOD ENDED 30 SEPTEMBER 2026 (All amounts disclosed in the consolidated financial statements and notes have been expressed in thousand currency units and are expressed in terms of purchasing power of Turkish Lira as of 30 September 2026 unless otherwise stated.) 39 Türk Telekom | Gizli | Kişisel Veri İçermez 15. DERIVATIVE FINANCIAL INSTRUMENTS (CONTINUED) Derivative transactions which are not designated as cash flow hedge As of 30 September 2026, there are no cross-currency transactions (31 December 2025: TL 13. 768 is recognized under short term derivative financial asset and TL 4.841 is recognized under short terms financial liabilities). As of 30 September 2026, there are no option transactions (31 December 2025: TL 4.764 is recognized under short term derivative financial liabilities). As of 30 September 2026, fair value of forward transactions amounting to TL 482.008 is recognized under short terms financial assets and TL 1.340.414 is recognized under short terms financial liabilities (31 December 2025: TL 2.576.790 is recognized under short term derivative financial liabilities). 30 September 2026 31 December 2025 Currency Maturity Nominal contract amount (Original currency) Fair Value Maturity Nominal contract amount (Original currency) Fair Value Cross currency transactions US Dollar − − − June 2026 3.333 (4.841) Euro − − − March 2026 1.498 13.768 Option transactions US Dollar − − − January 2026 94.000 (2.400) Euro − − − January 2026 75.000 (2.364) Forward transactions US Dollar October- November 2026 2.200.000 (858.406) January-April 2026 2.177.000 (2.137.731) Euro − − − January-April 2026 372.000 (439.059) (858.406) (2.572.627) Hedge of net investment in a foreign operation The Company utilized a loan amounting to EUR 150.000 in order to hedge its net investment in a foreign operation with a Euro functional currency. Foreign exchange gain and/or loss resulting from the subsidiary’s net investment portion of this loan is reclassified to reserve for hedge of net investment in a foreign operation under equity. 16. FINANCIAL INVESTMENTS 30 September 2026 31 December 2025 Short term financial assets Money market funds 10.202 − Long term financial assets Investment funds (*) 722.436 610.003 Other (**) 353.300 431.937 1.085.938 1.041.940 (*) It consists of TT Ventures’ Venture Capital Investment Fund investments of group companies. The fund aims to invest in innovative technology start -ups with global growth potential and to provide financial returns to its investors. The Group indirectly holds its investment in its affiliate, which has a significant influence, through its contribution payments to the established Venture Capital Investment Fund. The Group measure s this investment at fair value through profit or loss in accordance with TFRS 9. (**) The amounting to TL 95.779 in other consists of growth equity private equity fund investment.
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(Convenience translation of a report and financial statements originally issued in Turkish) TÜRK TELEKOMÜNİKASYON ANONİM ŞİRKETİ AND ITS SUBSIDIARIES NOTES TO THE INTERIM CONDENSED CONSOLIDATED FINANCIAL STATEMENTS AS AT AND FOR THE NINE MONTHS PERIOD ENDED 30 SEPTEMBER 2026 (All amounts disclosed in the consolidated financial statements and notes have been expressed in thousand currency units and are expressed in terms of purchasing power of Turkish Lira as of 30 September 2026 unless otherwise stated.) 40 Türk Telekom | Gizli | Kişisel Veri İçermez 17. SUPPLEMENTARY CASH FLOW INFORMATION Other explanations “Other outflows of cash” in net cash used in operating activities amounting to TL 531.227 (30 September 2025: TL 467.213) represents change in restricted cash (Note 6). “Other outflows of cash, net” in net cash used in financial activities amounting to TL (848.607) (30 September 2025: TL (1.124.810)) represents other financial payment. “Other adjustment for non -cash items” in adjustments to reconcile net profit to cash provided by operating activities amounting to TL 2.099.369 (30 September 2025: TL 1.383.457) represents profit margin in TFRS Interpretation 12 of intangible assets. 18. TAX ASSETS AND LIABILITIES 30 September 2026 31 December 2025 Corporate tax payable: Current corporate tax provision 3.775.631 8.460.641 Prepaid taxes and funds (-) (1.558.567) (4.255.121) Tax payable 2.217.064 4.205.520 Deferred tax assets 2.019.066 1.470.320 Deferred tax liabilities (33.163.979) (21.890.175) Deferred tax liabilities, net (31.144.913) (20.419.855) Tax Advantages Obtained within the Scope of Investment Incentive System Turkish tax legislation does not permit a parent company and its subsidiaries to file a consolidated tax return. Therefore, tax liabilities, as reflected in these consolidated financial statements, have been calculated on a separate- entity basis. In Turkey, the corporate tax rate is 25% as of 30 September 2026 (31 December 2025: 25%). Earnings of the Group that are derived from investments linked to an investment incentive certificate are subject to corporate tax at discounted rates for a certain period, which starts when the investment starts to partly or fully operate, and ends when t he maximum investment contribution amount is reached. Within this scope, the Group has accounted for TL 2.848.005 (31 December 2025: TL 3.517.888) of tax advantages as deferred tax assets which are expected to be re alized in the foreseeable future in the consolidated financial statements as of 30 September 2026 TL 669.883 (December - September difference current period effect) of deferred tax expense is recognized in the consolidated profit or loss statement for the period between 1 Januar y - 30 September 2026 from resulting from the recognition of such deferred tax assets. Deferred tax assets are recognized for deductible temporary differences, carry forward tax losses and indefinite - life investment incentives which allows payment of corporate tax at discounted rates, as long as it is probable that sufficient taxable income will be generated in the future. In this context, the Group recognizes deferred tax assets from investment incentives based on long -term plans, including taxable profit projections derived from business models, which are re-evaluated at each balance sheet date to assess recoverability of such deferred tax assets. The Group expects to recover such deferred tax assets within 5 years from the balance sheet date. In the sensitivity analysis performed as of 30 September 2026, when the inputs of the key macroeconomic and sectoral assumptions that form the business plans are increased/decreased by 10%, there is no change in the projected 5-year recovery periods of deferred tax assets related to investment incentives.
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(Convenience translation of a report and financial statements originally issued in Turkish) TÜRK TELEKOMÜNİKASYON ANONİM ŞİRKETİ AND ITS SUBSIDIARIES NOTES TO THE INTERIM CONDENSED CONSOLIDATED FINANCIAL STATEMENTS AS AT AND FOR THE NINE MONTHS PERIOD ENDED 30 SEPTEMBER 2026 (All amounts disclosed in the consolidated financial statements and notes have been expressed in thousand currency units and are expressed in terms of purchasing power of Turkish Lira as of 30 September 2026 unless otherwise stated.) 41 Türk Telekom | Gizli | Kişisel Veri İçermez 19. EXPLANATIONS REGARDING NET MONETARY POSITION GAINS/(LOS SES) Non-monetary items 1 January - 30 September 2026 1 July - 30 September 2026 1 January - 30 September 2025 1 July - 30 September 2025 Statement of financial position items 50.186.169 15.623.034 22.901.941 7.304.551 Inventories 634.926 220.575 707.979 79.776 Prepaid expenses 1.642.306 621.705 805.274 289.517 Other current assets 313.576 95.228 458.552 115.461 Non-current assets classified as held for sale 210.766 48.263 218.451 65.886 Tangible assets 42.050.585 10.306.931 37.612.907 11.488.757 Intangible assets 57.486.604 16.110.408 28.756.874 8.493.555 Right of use assets 3.450.476 928.645 3.743.653 1.176.137 Deferred tax assets, and liabilities (4.148.194) (949.904) (1.021.495) (301.448) Contract liabilities from sale of goods and service contracts (775.715) (152.377) (1.133.181) (188.355) Paid-in capital (24.467.036) (5.602.762) (25.359.238) (7.483.622) Repurchased shares 6.706 1.535 6.951 2.052 Other accumulated comprehensive income and expense not to be reclassified to profit or loss (481.220) (109.771) (584.304) (163.856) Other accumulated comprehensive income and expense to be reclassified to profit or loss 3.160.696 722.047 2.743.674 829.177 Restricted reserves (1.474.998) (337.763) (1.391.136) (410.530) Retained earnings (27.423.309) (6.279.726) (22.663.020) (6.687.956) Profit / (loss) statement items (3.339.107) (1.633.045) (3.798.310) (2.208.363) Revenue (16.336.137) (9.091.775) (17.567.574) (11.286.813) Cost of sales 6.849.889 3.857.140 8.057.220 5.395.275 Research and development expenses 149.560 82.323 183.582 110.745 Marketing expenses 1.062.095 599.007 1.147.837 716.389 General and administrative expenses 1.537.912 837.728 1.722.265 1.083.365 Other income / expense from operating activities 125.321 71.824 331.214 208.272 Income / expense from investment activities (70.259) (49.626) (195.677) (98.757) Finance income / expense 2.938.967 1.860.536 2.070.377 1.326.813 Tax expense for the period 403.545 199.798 452.446 336.348 Net monetary position gains / (losses) 46.847.062 13.989.989 19.103.631 5.096.188
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(Convenience translation of a report and financial statements originally issued in Turkish) TÜRK TELEKOMÜNİKASYON ANONİM ŞİRKETİ AND ITS SUBSIDIARIES NOTES TO THE INTERIM CONDENSED CONSOLIDATED FINANCIAL STATEMENTS AS AT AND FOR THE NINE MONTHS PERIOD ENDED 30 SEPTEMBER 2026 (All amounts disclosed in the consolidated financial statements and notes have been expressed in thousand currency units and are expressed in terms of purchasing power of Turkish Lira as of 30 September 2026 unless otherwise stated.) 42 Türk Telekom | Gizli | Kişisel Veri İçermez 20. REVENUE 1 January - 30 September 2026 1 January - 30 September 2025 Mobile 91.690.115 92.000.181 Broadband 73.017.147 64.735.288 Fixed asset purchases expensed under TFRS Interpretation 12 and investment provision expenses (Note 5,21) 18.248.361 12.025.434 Corporate data 17.031.989 14.203.586 Fixed voice 7.731.901 8.084.399 International revenue 5.578.767 6.721.581 Other 23.212.138 17.188.557 236.510.418 214.959.026 21. EXPENSE BY NATURE 1 January - 30 September 2026 1 January - 30 September 2025 Personnel expenses (46.501.321) (48.195.501) Taxes (22.070.047) (21.301.277) Fixed asset purchases expensed under TFRS Interpretation 12 and investment provision expenses (16.148.992) (10.641.977) Repair and maintenance expenses (12.283.556) (9.649.773) Cost of sales and cost of equipment sales of technology companies (10.720.739) (5.915.559) Interconnection cost (5.625.785) (7.197.007) Utilities (5.893.343) (6.443.920) Other expenses (19.507.988) (15.354.776) Total operating expenses (excluding depreciation and amortisation expense) (138.751.771) (124.699.790) Depreciation, amortisation (52.419.047) (42.594.521) Impairment provision / reversal for tangible and intangible non-current assets 91 (7) Total operating expenses (191.170.727) (167.294.318) 22. SUBSEQUENT EVENTS The Group, signed a long -term club loan agreement amounting to USD 1.000.000 with the participation of 14 international banks on October 26. The loan will be allocated to the Group’s general financing requirements, primarily its 5G and fiber investments leading the digital transformation of our country.