NEX H2 2025 & Status update Presentation

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FY 2025 Excellent financial performance February 19, 2026 - Paris Julien Hueber, CEO Vincent Piquet, CFO

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Safe Harbour This presentation contains forward-looking statements which are subject to various expected or unexpected risks and uncertainties that could have a material impact on the Company’s future performance. Readers are also invited to visit the Group’s website where they can view and download Nexans’ Universal Registration Document,which includes a description of the Group’s risk factors. NB: any discrepancies are due to rounding. INVESTOR RELATIONS: Contact: Audrey Bourgeois Telephone: +33 1 78 15 00 43 Email: audrey.bourgeois@nexans.com FY 2025 RESULTS | Page 2 Nexans 2026 © All right Reserved

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FY 2025 RESULTS | Page 5 Nexans 2026 © All right Reserved In compliance with IFRS 5, the Industry and Solutions Businesses (consisting of Amercable, Lynxeo and Autoelectric) are now classified as discontinued operations in the 2025 consolidated financial statements. Such classification is reflected on both the year 2025 and the comparative year 2024, in order to ensure the consistency of presentation between reported periods. Refer to the appendices of this presentation. As a consequence and as disclosed on December 22nd,2025, Group’s 2025 guidance was aligned with the new scope of continuing operations, which now excludes the discontinued operations: Adjusted EBITDA between €710 million and €760 million, Free Cash Flow between €275 million and €375 million. Preliminary statement

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+8.3% FY 2025 vs FY 2024 GROUP ORGANIC GROWTH €6,098m ROBUST CASH GENERATION 47.3% CASH CONVERSION CLOSING EXPECTED MID - 2026 PORTFOLIO ROTATION GROUP ADJUSTED EBITDA ELECTRIFICATION +11.6% 11.9% €728m ROCE 21.3% FY 2025 vs FY 2024 GROUP STANDARD SALES ADJUSTED EBITDA ADJ. EBITDA MARGIN 13.3% OF STANDARD SALES OF STANDARD SALES FY 2025, strong set of results Excellent financial performance reflecting the strengths of Nexans’ business model FY 2025 RESULTS | Page 6 Nexans 2026 © All right Reserved SOLID BALANCE SHEET Former “Non-Electrification activities” (consisting of AmerCable, Lynxeo and Autoelectric) are now classified as discontinued operations following the announcement of the disposal of Autoelectric in December 2025 and in compliance with IFRS 5 0.36x LEVERAGE VALUE-CREATING ACQUISITIONS IN CANADA CLOSED DECEMBER 17, 2025 IN SPAIN CLOSED JUNE 2, 2025 ORGANIC GROWTH AUTOELECTRIC

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157 271 313 177 344 347 599 804 571 728 10% 20% 21% 18.0% 21.3% ADJUSTED EBITDA (€m) AND ADJUSTED EBITDA MARGIN(1) (%) ROCE (%) FREE CASH FLOW (€m) & CASH CONVERSION RATIO(4) (%) 47.3% FY 2024(2) FY 2025FY 2024(2)FY 2022 FY 2024(2)FY 2022 39% 11% 11.9% FY 2025 Nexans’ model continues to deliver year after year (1) From H1 2020 to H1 2022 : EBITDA is defined as operating margin before depreciation and amortization. Starting 2023, EBITDA is relabeled as Adjusted EBITDA to comply with ESMA/20151415, and defined as operating margin before (i) depreciation and amortization, (ii) share-based payment expenses, and (iii) some other specific operating items which are not representative of the business performance (2) Including 7-month contribution of La Triveneta Cavi (3) Excluding Amercable, Lynxeo and Autoelectric, in accordance with IFRS 5 (4) Calculated as Free Cash Flow / Adjusted EBITDA (5) Including 12-month proforma contribution of La Triveneta Cavi (6) Including 12-month proforma contribution of Cables RCT, and excluding Electro Cables 9% 10.3% 45% 31.0% FY 2020 6% FY 2020 45% FY 2025 RESULTS | Page 7 Nexans 2026 © All right Reserved Published Restated(3) Published FY 2024(2) FY 2025 Restated(3) FY 2024(5) FY 2025(6)FY 2024FY 2022FY 2020 Published Restated(3) GROUP EXCL. OTHER ACTIVITIES 29% 26% 27.2%14% 26.0% IFRS 5 restatement GROUPIFRS 5 restatement IFRS 5 restatement IFRS 5 restatement

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Autoelectric designs and manufactures wiring harnesses and vehicle wiring system solutions for the automotive industry c. 14,000 EMPLOYEES REPRESENTING c. 50% OF NEXANS GROUP CLOSING OF THE TRANSACTION EXPECTED MID-2026 TRANSFORMATION INTO A c. € 749m CURRENT SALES IN FY 2024 c.€ 207m ENTERPRISE VALUE Exclusive negotiations for the sale of Autoelectric, last portion of Nexans’ portfolio rotation Nexans becoming a Global Electrification Pure Player FY 2025 RESULTS | Page 8 Nexans 2026 © All right Reserved PURE PLAYER OF ELECTRIFICATION

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Value-Creating Acquisitions Nexans reinforced its presence in key geographies & replicates its model of value creation c. €260m Acquisitions in 2025 c. €133m sales(2) c. 175 employees c. €125m sales(1) c. 200 employees 2 industrial sites in Canada Canadian specialist in low-voltage cables with strong expertise in high added value solutions Attractive growth and robust profitability profile Spanish low-voltage cables manufacturer with expertise in flexible fire safety solutions Appealing synergies case Deploying synergies driven by the rollout of our proprietary SHIFT program (1) LTM ending July 2025 (2) FY 2024 Closed December 17th, 2025 Signing & Closing June 2nd , 2025 2 Cumulative full-year sales acquired Data center portfolio expertise FY 2025 RESULTS | Page 9 Nexans 2026 © All right Reserved

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SCIENCE BASED INITIATIVE (SBTi) TARGETS VS 2019 BASE YEAR SCOPE 3 EMISSIONS UPSTREAM SCOPE 1 EMISSIONS DIRECT SCOPE 3 EMISSIONS DOWNSTREAM SCOPE 2 EMISSIONS INDIRECT PURCHASE OF RAW MATERIALS BUSINESS TRAVEL USE OF SOLD PRODUCTS INDUSTRIAL OPERATIONS PURCHASE OF ELECTRICITY FREIGHT FREIGHT WASTES Carbon emissions reduction (in %) 2019 2028 2030 -30% -46% 2050 -30% -42% APPROVED 2025 -49% -40% Good performance and progress to date occurs in stages and cannot be extrapolated linearly to the year 2030. Rounded figures. 2025 sustainability achievements Nexans commitment to Science Based Targets Initiatives FY 2025 RESULTS | Page 10 Nexans 2026 © All right Reserved 2025 -49% -40% Mainly driven by: • Energy efficiency initiatives on sites • 66% of Renewable Electricity used in our facilities • Low-Carbon Aluminum purchased Scopes 1&2 Scope 3

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FY 2025, strong dynamics nurtured by underlying trends on Electrification Structural improvements of EBITDA thanks to selective approach and quality of execution * Restated 2024, see appendices FY 2024* FY 2025 FY 2025 RESULTS | Page 12 Nexans 2026 © All right Reserved +8.3% FY 2025 Group adj. EBITDA margin at 11.9% of standard sales, +161 bps in Adj. EBITDA margin driven by PWR-Transmission and PWR-Grid Group excl. Other activities Adj. EBITDA at 13.3% of standard sales Strong organic growth with exceptionally high level in PWR- Transmission in the last two years, and in PWR-Connect in Q4 2025 5,537 6,098 571 10.3% 728 11.9% GROUP +11.6% +18.3% FY 2025Q4 2025 +13.3% FY 2025 ADJ. EBITDA (€m) Standard sales (€m) GROUP (EXCLUDING OTHER ACTIVITIES) ORGANIC GROWTH STANDARD SALES & ADJ. EBITDA ORGANIC GROWTH ADJ. EBITDA MARGIN +11.8% Q4 2025

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1,287 1,657 PWR-Transmission Exceptional level of organic growth in 2025 and quality of execution on projects Exceptionally high level of organic growth in 2025 thanks to full utilization of new capacity installed, and a high installation load, expected to return to a normalized level in 2026 * Restated and pro forma 2024, see appendices FY 2025 RESULTS | Page 13 Nexans 2026 © All right Reserved ADJUSTED BACKLOG (€bn) GOOD VISIBILITY UNTIL 2028 7.7 7.4 3.5 2.3 FY 22 FY 23 FY 24 FY 25 +4.2% FY 2024* FY 2025 FY 21 6.1 ADJ. EBITDA (€m) +40.0% +29.8% GSI €1.2bn 142 11.0% 203 12.3% Standard sales (€m) Adj. EBITDA margin improvements driven by : - Quality of execution on our projects - Increased efficiency after a full year of operations in the expanded portion of our plant in Halden, Norway. ORGANIC GROWTH STD. SALES & ADJ. EBITDA (€m) FY 2025Q4 2025

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PWR-Grid Strong value creation with high demand for advanced offers Organic growth seasonally softer in Q1 and Q4, project phasing, Accessories business remained very well- oriented Strong visibility thanks to multiple long-term frame agreement wins Adjusted EBITDA rose by +19.4% The adjusted EBITDA margin increased by +226 bps This performance demonstrated : - Our operational excellence, mutualization - Good performance of Accessories - Increased selectivity amid strong demand for our services - Some one-off effects linked to renewable projects in Europe FY 2025 RESULTS | Page 14 Nexans 2026 © All right Reserved +3.5% +5.5% 1,281 1,319 FY 2024* FY 2025 181 14.2% 217 16.4% ADJ. EBITDA (€m) Standard sales (€m) STD. SALES & ADJ. EBITDA (€m) ORGANIC GROWTH FY 2025Q4 2025 * Restated and pro forma 2024, see appendices

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PWR-Connect High performance of our advanced offers within mixed regional dynamics 2025 organic growth in line with our mid-term guidelines Q4 2025 exceptional level of organic growth linked to customer driven anticipation of delivery of large projects linked to infrastructures and data centers Strong Adj. EBITDA margin performance on our advanced offers and platinum customers The conventional part of business remained under pressure, especially in Asia Pacific Scope of La Triveneta Cavi - shifting towards innovative solutions as planned and roll out of our SHIFT program Strong focus on operational and industrial excellence * Restated and pro forma 2024, see appendices FY 2025 RESULTS | Page 15 Nexans 2026 © All right Reserved ORGANIC GROWTH +10.9% +3.6% FY 2025Q4 2025 2,062 2,341 FY 2024* FY 2025 271 289 STD. SALES & ADJ. EBITDA (€m) ADJ. EBITDA (€m) Standard sales (€m) 12.3%13.1%

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FY 2025 standard sales bridge High organic growth and contributing sales from acquisitions FY 2025 RESULTS | Page 17 Nexans 2026 © All right Reserved Organic Scope FX 5,537 6,098 +5.1% +8.3% FY 2024(1) FY 2025 +10.1% (3.3%) in €m (1) Restated in accordance with IFRS 5, see appendices

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FY 2025 adjusted EBITDA bridge Increase by +27% year on year, driven by PWR-Transmission and PWR-Grid GROUP– ADJUSTED EBITDA EVOLUTION(€m) FY 2025 RESULTS | Page 18 Nexans 2026 © All right Reserved FX Other activities 571 728 FY 2024(1) FY 2025 11.9% MARGIN 10.3% MARGIN +27.3% 62 41 47 29 (23) (1) Restated in accordance with IFRS 5, see appendices (2) Includes €26m of scope composed of (i) 5-month contribution of La Triveneta Cavi (ii) 7-month contribution of Cables RCT PWR-Transmission PWR-Grid PWR-Connect Incl. €26m scope (2)

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2025 Excellent financial performance Strong margin expansion, net income from continuing operations increased by +31.1% FY 2025 RESULTS | Page 19 Nexans 2026 © All right Reserved In €m FY 2024(1) FY 2025 Var % SALES AT CURRENT METAL PRICES 6,917 7,810 +12.9% SALES AT STANDARD METAL PRICES 5,537 6,098 +10.1% ADJUSTED EBITDA 571 728 +27.3% Adj. EBITDA(% of standard sales) 10.3% 11.9% +161bps NET INCOME FROM CONTINUING OPERATIONS 167 219 +31.1% NET INCOME FROM DISCONTINUED OPERATIONS 115 138 +20.0% NET INCOME GROUP 283 358 +26.6% 1 2 Key variations: Including gains on disposals from AmerCable and Lynxeo, the impairment on Autoelectric and the operating performance from Industry & Solutions 1 2 Strong adjusted EBITDA, up 27.3% yoy Decrease of financial expenses linked to hedging Increase of D&A at €253m in 2025 (vs. €175m in 2024) (1) Restated in accordance with IFRS 5, see appendices

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(82) 727 (681) 728 252 (43) (129) (383) 1 (147) (371) (137) (266) FY 2025 net debt bridge Solid cash discipline across all business units & high downpayments in PWR-Transmission NET DEBT DEC 2024 Dividend & Others equity operations NET DEBT DEC 2025 M&A and disposals Income Taxes Paid & Others Reorganization cash-out NET DEBT EVOLUTION (€m) IFRS16 & FX impacts Leverage(1) 1.19x Financial interest Capital expenditures Other Investing Change in Working Capital Adj. EBITDA CASH FLOW FROM OPERATIONS €808m CASH CONVERSION RATIO (2)47%FREE CASH FLOW €344m (1) Ratio of closing net debt to adjusted EBITDA on trailing twelve-month basis (2) Calculated as Free Cash Flow / adjusted EBITDA FY 2025 RESULTS | Page 20 Nexans 2026 © All right Reserved Change in discontinued activities Leverage(1) 0.36x

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200 400 350 250 575 800 2029 May 2028 April 2030 March Undrawn Revolving Credit Facility Maturity October 2029 Sustainability-Linked Bond 5.50% Bond 4.125% Bond 4.25% EIB(1) (1) European Investment Bank: €200m financing at 1.93% and €250m undrawn loan(maturity July 2027) (2) Ratio of closing net debt to adjusted EBITDA on trailing twelve-month basis (3) Fixed-rate commercial paper for c.€96m; local borrowings, IFRS restatements on ordinary bonds & others for c. €68m; accrued interest and IFRS 16 for c. €208m Excluding commercial paper, local borrowings, IFRS restatements (3) 100% FIXED-RATE €1,634m Sound balance sheet A well-diversified debt structure and no upcoming maturity before 2027 2027 April Cash & Cash Equivalents DEBT PROFILE AND MATURITIES AS OF DECEMBER 31, 2025 (€m) vs. €1,254m as of December 31, 2024 as of December 31, 2025 Total liquidity €2,684m vs. €2,054m FY 2025 RESULTS | Page 21 Nexans 2026 © All right Reserved Undrawn Maturity July 2027 0.36x FINANCIAL LEVERAGE (2) BB+ STABLE OUTLOOK Low leverage ratio Credit Rating Standard & Poor’s, Last updated 25/03/2025 c.4.2% FY 2025 Group averagecostof debt Incl. €800m RCF and €250m EIB both undrawn, as of December 31, 2025 as of December 31, 2024 March 2025, S&P

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Attractive shareholder return 59% TSR over the past 3 years FY 2025 RESULTS | Page 22 Nexans 2026 © All right Reserved (1) Subject to Nexans Annual Shareholders meeting vote, May 21st, 2026 (2) Payout ratio is calculated based on recurring net income - Group share as detailed in the appendices (3) Source: Bloomberg DIVIDEND/SHARE (€) EVOLUTION 41.9% in 2025 +59% 3-year TSR ≥30% TOTALSHAREHOLDER RETURN AT DECEMBER 31, 2025(3) +215% 6-year TSR 2021 0.7 1.2 2022 2.1 2023 2.3 2020 – 2024 2019 2.6 Dividend payout ratio(2) 2028 target 2025 PROPOSED DIVIDEND(1) 2.9 +11.5%

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2026 Guidance €730m – €810m €210m – €310m ADJUSTED EBITDA FREE CASH FLOW FY 2025 RESULTS | Page 24 Nexans 2026 © All right Reserved With H1 2026 expected to be softer compared to H2 2026 This guidance does not assume execution of the Great Sea Interconnector project in 2026 and excludes the contribution of not completed acquisitions

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Appendices

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2028 guidance ADJ. EBITDA FCF CONVERSION(1) ROCE DIVIDEND PAYOUT(2) LEVERAGE GROUP >45% >20% 30% €1,150m (+/-€75M) ORGANIC SALES 2024-2028 CAGR (ELECTRIFICATION) 3-5% (1) FCF pre-M&A and equity operations / Adj. EBITDA assuming flat change in WC (2) Share of recurring net income ≤ 1.0x FY 2025 RESULTS | Page 26 Nexans 2026 © All right Reserved

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Nexans at a glance A global player of the energy transition €6 .1bn STANDARDSALES 25,700 PEOPLE 41 COUNTRIES OUR PURPOSE WE ELECTRIFY THE FUTURE OUR VALUES DEDICATED PIONNEERS UNITED OUR PROMISE SCALE-UP TO STEP-UP PWR-TRANSMISSION PWR-GRID PWR-CONNECT ELECTRIFICATIONBUSINESSES OTHER (MAINLY METALLURGY) 2025 FY 2025 RESULTS | Page 27 Nexans 2026 © All right Reserved (1) Including Autoelectric (1) (1)

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Diversified end-markets and balanced geographic footprint % SALES AT STANDARD METAL PRICES, EXCLUDING PWR-TRANSMISSION 16% NORTH AMERICA €682m 14% LATIN AMERICA €638m 53% EUROPE €2,367m 10% MIDDLE EAST & AFRICA €448m 7% APAC €307m €6.1Bn 2025 STANDARD SALES 38% 40% PWR-TRANSMISSION PWR-GRIDPWR-GRID PWR-TRANSMISSION 13% 2% FY 2025 RESULTS | Page 28 Nexans 2026 © All right Reserved PWR-CONNECT 28% 30% €728m 2025 ADJUSTED EBITDA 27% OTHERS 22% PWR-CONNECT OTHERS

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Our strategy Electrifying the future PWR-TRANSMISSION Offshore wind Residential Datacenters Industrial Commercial Mobility Infra- structures Centralized generation Transmission subsea and land Distribution Usage Onshore wind Solar Hydro Nuclear Distributed generation (Utility scale) Distributed generation (Private) ELECTRIFICATION PWR- CONNECTPWR- GRID FY 2025 RESULTS | Page 29 Nexans 2026 © All right Reserved

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DISTRIBUTION OF SHARE CAPITAL (%) as of 31 DECEMBER 2025 Invexans 9.2% BPI 5.2% 7.5% Employees 3.9% Retail Investors & Nominatif Holders Shareholder structure as of 31 December 2025 FY 2025 RESULTS | Page 30 Nexans 2026 © All right Reserved Other Institutional Investors 66.9% Others 7.3%(1) Institutional Investors 81.3% (1) Including 0.14% of Treasury shares

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An ESG scorecard up to 2028 aligned with our strategic priorities Significant progress achieved in 2025 FY 2025 RESULTS | Page 31 Nexans 2026 © All right Reserved Actual 2025 Target 2028 Engagement Total Recordable Incident Rate (LTI/MTI)* 9.01 <6.00 Gender diversity in graded positions 29.2% 30.0% NLV Engagement 79.0% ≥78.0% Environment Reduction of GHG emissions - Scopes 1 & 2 48.8% 42.0% Reduction of GHG emissions - Scope 3 39.8% 29.6% Copper recycled content 19.3% 25.0% % of sales covered by a PEP (Product Environmental Passport) 42 .2% 55.0% Ecosystem Completion rate of Compliance awareness trainings 100% 100% Supplier CSR net risk 1.24 1.00 *The perimeter reflects the projected electrification scope, with Autoelectric excluded

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FY 2025 RESULTS | Page 32 Nexans 2026 © All right Reserved Nexans ESG Ratings Ratings go from 0 (lower) to 100 (higher) CLIMATE WATERRatings go from D- (lowest) to A (highest) Ratings go from CCC (lowest) to AAA (highest) 78 A A- A 22.6 Ratings go from 0 (negligible risk) to 40+ (severe risk) Nexans’ continuous ESG progress is positioning the Group among the top performers in its industry

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Impact of Scope Changes & Exchange Rates on Standard(1) Sales (1) Standard: Copper standard price at €5,000/t and Aluminum standard price at €1,200/t. (2) Organic growth on Standard sales at constant scope and currency. FY 2025 RESULTS | Page 33 Nexans 2026 © All right Reserved (in millions of euros) FY 2024 Pro Forma & Restated Scope Currency Organic Growth(2) FY 2025 PWR-Transmission 1,287 - (10) 380 1,657 PWR-Grid 1,281 - (31) 69 1,319 PWR-Connect 2,062 283 (77) 72 2,341 Subtotal excl. Other activities 4,630 283 (118) 522 5,317 Other activities 907 - (47) (78) 782 TOTAL GROUP 5,537 283 (166) 443 6,098

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2025 Information by segment (1) Organic growth on Standard sales at constant scope and currency. (2) Standard: Copper standard price at €5,000/t and Aluminum standard price at €1,200/t FY 2025 RESULTS | Page 34 Nexans 2026 © All right Reserved 2025 QUARTERLY ORGANIC GROWTH(1) BY SEGMENT Q1 2025 Q2 2025 H1 2025 Q3 2025 9M 2025 Q4 2025 FY 2025 PWR-Transmission +21.7% +21.6% +21.7% +33.3% +25.3% +40.0% +29.8% PWR-Grid +1.3% +9.0% +5.3% +8.3% +6.2% +3.5% +5.5% PWR-Connect +1.5% -1.4% +0.0% +3.1% +1.1% +10.9% +3.6% Subtotal excl. Other activities +6.5% +8.5% +7.6% +12.2% +9.1% +18.3% +11.6% Other activities +0.1% +6.3% +2.9% -17.9% -3.3% -30.2% -9.3% TOTAL GROUP +5.2% +8.2% +6.8% +7.6% +7.0% +11.8% +8.3% (in millions of euros) Q1 2025 Q2 2025 H1 2025 Q3 2025 9M 2025 Q4 2025 FY 2025 PWR-Transmission 308 439 747 368 1,115 542 1,657 PWR-Grid 313 364 677 314 991 328 1,319 PWR-Connect 603 588 1,192 551 1,743 598 2,341 Subtotal excl. Other activities 1,224 1,391 2,615 1,233 3,849 1,468 5,317 Other activities 254 224 478 166 644 138 782 TOTAL GROUP 1,478 1,615 3,093 1,399 4,492 1,606 6,098 2025 STANDARD(2) SALES (in millions of euros) Q1 2025 Q2 2025 H1 2025 Q3 2025 9M 2025 Q4 2025 FY 2025 PWR-Transmission 316 442 758 377 1,135 556 1,691 PWR-Grid 374 433 807 373 1,180 398 1,578 PWR-Connect 826 809 1,635 762 2,398 857 3,254 Subtotal excl. Other activities 1,517 1,684 3,201 1,512 4,713 1,811 6,524 Other activities 415 361 777 272 1,049 238 1,286 TOTAL GROUP 1,932 2,045 3,977 1,784 5,761 2,049 7,810 2025 CURRENT SALES (in millions of euros) H1 2025 H2 2025 FY 2025 PWR-Transmission 88 115 203 PWR-Grid 107 109 217 PWR-Connect 163 126 289 Subtotal excl. Other activities 358 350 708 Other activities 14 6 20 TOTAL GROUP 372 356 728 2025 ADJUSTED EBITDA

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2024 Pro Forma & Restated Reconciliation (1)Standard: Copper standard price at €5,000/t and Aluminum standard price at €1,200/t. (2) According to IFRS 5 requirements, sales made to Non-Electrification business and previously considered as intercompany sales are requalified as external sales. FY 2025 RESULTS | Page 35 Nexans 2026 © All right Reserved BRIDGE 2024 STANDARD(1) SALES (in millions of euros) FY 2024 Reported Scope reclass. IFRS 5 restatements(2) FY 2024 Pro Forma & Restated PWR-Transmission 1,287 - - 1,287 PWR-Grid 1,243 29 8 1,281 PWR-Connect 2,073 (22) 12 2,062 Non-Electrification (Industry & Solutions) 1,701 (62) (1,639) - Subtotal excl. Other activities 6,304 (55) (1,619) 4,630 Other activities 774 55 78 907 TOTAL GROUP 7,078 - (1,541) 5,537 (in millions of euros) FY 2024 Reported Scope reclass. IFRS 5 restatements(2) FY 2024 Pro Forma & Restated PWR-Transmission 142 - - 142 PWR-Grid 170 12 - 181 PWR-Connect 283 (13) - 271 Non-Electrification (Industry & Solutions) 207 (6) (201) - Subtotal excl. Other activities 802 (7) (201) 594 Other activities 2 7 (32) (23) TOTAL GROUP 804 - (233) 571 BRIDGE 2024 ADJUSTED EBITDA (in millions of euros) Q1 2024 Q2 2024 H1 2024 Q3 2024 9M 2024 Q4 2024 FY 2024 PWR-Transmission 257 365 622 277 899 389 1,287 PWR-Grid 311 343 654 297 951 329 1,281 PWR-Connect 464 520 984 533 1,517 546 2,062 Subtotal excl. Other activities 1,033 1,227 2,260 1,107 3,367 1,263 4,630 Other activities 260 224 483 212 695 212 907 TOTAL GROUP 1,292 1,451 2,743 1,319 4,062 1,475 5,537 2024 QUARTERLY STANDARD(1) SALES 2024 ADJUSTED EBITDA (in millions of euros) H1 2024 H2 2024 FY 2024 PWR-Transmission 68 74 142 PWR-Grid 105 76 181 PWR-Connect 133 138 271 Subtotal excl. Other activities 305 289 594 Other activities (19) (4) (23) TOTAL GROUP 287 285 571

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(1) FY 2024 is restated in compliance with IFRS 5. (2) In FY 2025, the Specific operating items included (€38m) related to IFRS2 share-based payment expenses, of which (€17m) linked to ACT 2025. (in millions of euros) FY 2025 FY 2024(1) ADJUSTED EBITDA 728 571 Specificoperatingitems(2) (35) (22) Depreciationand amortization (253) (175) OPERATINGMARGIN 439 374 Core exposure effect 24 41 Reorganizationcosts (48) (46) Other operational income and expenses (38) (28) - Of which: net asset impairment (6) (0) - Of which: M&A expenses (18) (16) - Of which: Net gains on asset disposal 7 (4) Share in net income (loss) of associates 2 (0) OPERATING INCOME 378 340 (in millions of euros) FY 2025 FY 2024(1) FY 2023 FY 2022 FY 2021 EBITDA 693 549 612 599 463 EBITDA margin (% of standard sales) 11.4% 9.9% 9.4% 8.9% 7.6% IFRS 2 Share-based payment expenses 38 19 13 16 8 Other specific operating items -3 3 40 - - ADJUSTED EBITDA 728 571 665 616 470 Adjusted EBITDA margin (% of standard sales) 11.9% 10.3% 10.2% 9.1% 7.8% EBITDA to adjusted EBITDA Adjusted EBITDA to operating income FY 2025 RESULTS | Page 36 Nexans 2026 © All right Reserved

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FY 2025 RESULTS | Page 37 Nexans 2026 © All right Reserved (in millions of euros) FY 2025 FY 2024* OPERATING MARGIN 439 374 Cost of debt (net) (53) (55) Recurring other financial income and expense restated 19 (51) Income taxes (incl. impact from normalization adjustments) (97) (79) Minority interests (6) (3) RECURRING NET INCOME (GROUP SHARE) 302 186 Proposed dividend to parent - €2.60/share proposed at the Annual General Meeting(1) 127 114 Payout (in %) 41.9% 61.4% Operating margin to recurring net income *FY 2024 is restated in compliance with IFRS 5.

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Balance Sheet As of December 31, 2025 (1) Closing Net debt / Net equity. (2) Average of last two published net debt (H1 2025 and FY 2025) / LTM EBITDA. (3) FY 2024 is restated in compliance with IFRS 5. In €m DEC 2025 DEC 2024 Fixed assets and other non-currentassets 3,266 3,228 of which:goodwill 680 470 Deferred tax assets 81 117 NON-CURRENT ASSETS 3,347 3,345 Workingcapital (539) (303) Net assets held for sale 61 102 TOTAL TO BE FINANCED 2,869 3,145 Net financialdebt 266 681 Reserves 348 421 of which restructuring provisions 16 17 of which pension &jubilees reserves 170 213 Deferred tax liabilities 177 151 Derivative liability non-current 64 60 Shareholders’ equity and minorityinterests 2,014 1,833 TOTAL FINANCING 2,869 3,145 GEARING RATIO DEBT COVENANTS LEVERAGE RATIO 12% 37% 13% DEC 2023 DEC 2024(3) DEC 2025 Net debtCovenant @120% Gearing(1) Net debtCovenant @3.2x EBITDA Leverage(2) 0.4x 1.4x 0.2x DEC 2023 DEC 2024(3) DEC 2025 FY 2025 RESULTS | Page 38 Nexans 2026 © All right Reserved

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Glossary Adjusted PWR-Transmission backlog: Backlog adjusted for secured but not yet implemented Subsea, Land and Special Telecom contracts. Adjusted EBITDA: Starting 2023, Nexans consolidated adjusted EBITDA is defined as operating margin before (i) depreciation and amortization, (ii) share-based payment expenses, and (iii) other specific operating items which are not representative of the business performance. Free Cash Flow (FCF): FCF is determined based on EBITDA restated for the net change in provisions including pensions/other post-employments benefits and other non-cash items. It also includes net changes working capital, capital expenditures net of disposal proceeds, other investing cash-in/out but excluding those related to the sale/purchase of shares in a company with a change in consolidation method, restructuring cash-out, financial interest paid and income tax paid. Operating margin: The operating margin is assessed before the impact of (i) the revaluation of the Core exposure, (ii) impairment of property, plant and equipment, intangible assets or goodwill resulting from impairment tests, (iii) the change in fair value of non-ferrous metal financial instruments, (iv) capital gains and losses on asset disposals, (v) related acquisition costs for completed acquisitions and costs and fees related to planned acquisitions, (vi) expenses and provisions for antitrust investigations, (vii) reorganization costs, (viii) the share in net income of associates, (ix) net financial income (loss), (x) taxes and (xi) net income from discontinued operations. Organic growth: Standard sales growth as a percentage of prior- year standard sales. Organic growth is a measure of growth excluding the impact of changes in the scope of consolidation and changes in exchange rates. ROCE (Return on Capital Employed): ROCE is defined as 12 months Operating Margin in relation to end-of-period Operational Capital Employed, excluding the antitrust provision. Operational Capital Employed includes operating and non- operating working capital items, intangible and tangibles assets, loans and receivables, deferred taxes, reserves excluding pensions and other employee benefit reserves and restructuring reserves. Recurring net income: the recurring net income corresponds to the sum of the operating margin, the cost of financial debt (net), other financial income and expenses (excluding impairment of financial assets where applicable), and the normative corporate income tax. Sales at standard non-ferrous metal prices: Sales figures based on a standard price for copper and aluminum in order to neutralize the effect of fluctuations in non-ferrous metal prices and therefore measure the underlying sales trend. Starting on January 1, 2020, these references are set at 5,000 euros per metric ton for copper and 1,200 euros per metric ton for aluminum and are then converted into the currencies of each unit, thus taking into account the specific economic conditions of the units. Sales at current non-ferrous metal prices: Net sales (at current metal prices) represent revenue from sales of goods held for resale, as well as sales of goods and services deriving from the Group’s main activities, for which consideration has been promised in contracts drawn up with customers. FY 2025 RESULTS | Page 39 Nexans 2026 © All right Reserved

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Financial Calendar and Contact Audrey Bourgeois VP Investor Relations +33 1 78 15 00 43 audrey.bourgeois@nexans.com FINANCIAL CALENDAR April 28, 2026: Q1 2026 financial information May 21, 2026: Annual General Meeting May 25, 2026: Dividend – Ex-dividend date May 26, 2026: Dividend – Record date May 27, 2026: Dividend – Payment date July 29, 2026: H1 2026 results October 22, 2026: Q3 2026 financial information

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Nexans’ agile model of value creation Virtual Event February 19, 2026 Julien Hueber, CEO Vincent Piquet, CFO Vincent Dessale, CCO

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Nexans, ready to intensify with its unique positioning as a Global Electrification Pure Player Business Deep-Dive Enhancing performance across the portfolio, leveraging structural drivers of value creation Delivering 2028 trajectory Through Nexans’ agile value creation model Page 2 Nexans 2026© All right Reserved| Business Deep-Dive Presentation | February 2026

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Nexans, ready to intensify its unique positioning as a Global Electrification Pure Player With buoyant electrification markets in a more volatile environment S E C T I O N O 1

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2020 2021 20232022 2024 2025 Closing completed on June 30, 2025 Closing completed on January 2, 2025 Closing completed on June 2, 2025 (1) Sales at current metal prices 2026 Closing expected mid-2026 Closing completed on December 17, 2025 €1.5Bn sales(1) ACQUISITIONS CENTELSA REKA CABLES BERK-TEK (TELECOM) TELECOM SYSTEMS LYNXEOAMERCABLE AUTO ELECTRIC Page 4 Nexans 2026 © All right Reserved| Business Deep-Dive Presentation | February 2026 Nexans is now fully positioned as a Global Electrification Pure Player ELECTRO CABLESCABLES RCTLA TRIVENETA CAVI €2.2Bn sales(1) DIVESTMENTS

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Page 5 Nexans 2026 © All right Reserved 80 to SITES 34 to SUB-SECTORS c.25,000 to EMPLOYEES* TECHNICAL PROCESSES ELECTRIFICATION ROCE(2) FREE CASH FLOW(3) ELECTRIFICATION Adj. EBITDA(1) | Business Deep-Dive Presentation | February 2026 (1) FY 2021 €338m - FY 2025 €708m (2) FY 2021 22% - FY 2025 27% (3) FY 2021 €179m - FY 2025 €344m AMPLIFY (Since 2021) SIMPLIFY (Since 2021) Ready to scale * Excluding Autoelectric

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Well-diversified business profile to generate profitable growth Addressing markets with a selective approach A well-balanced activities profile A diversified geographic footprint NORTH AMERICA EUROPE LATIN AMERICA MIDDLE EAST & AFRICA APAC % SALES AT STANDARD METAL PRICES, EXCLUDING PWR-TRANSMISSION PWR-TRANSMISSION PWR-CONNECT 38% PWR-GRID OTHER ACTIVITIES 13% 27%22% 2025 STANDARD SALES mainly Metallurgy 2025 STANDARD SALES • Critical Buildings • Industrial Buildings • Residential & Commercial Buildings • Infra (Rail & Tunnel) • Data centers • Wind • Solar • Energy Storage • Interconnexion • Offshore Wind • Grid (Overhead lines & Underground) Page 6 Nexans 2026 © All right Reserved| Business Deep-Dive Presentation | February 2026

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Despite a more volatile environment OF CABLES TO BE BUILT OR REPLACED BY 2040, THE EQUIVALENT OF TODAY’S GRID OVER THE NEXT 15 YEARS(3) OF OFFSHORE WIND CAPACITY TO BE INSTALLED FROM 2025-2030, REPRESENTING A 27% CAGR(5) OF THE TOTAL INCREASE IN RESIDENTITIAL ELECTRICITY DEMAND BY 2040 WILL COME FROM NEWLY CONNECTED USERS, REPRESENTING 270 TWh (4) in Electrification driving long-term demand across our markets Mega Trends OF THE WORLD’S POWER GRID BY 2030 NOT FIT FOR PURPOSE TO HANDLE RENEWABLE ENERGY(2) → SHARE OF GLOBAL ELECTRICITY USED IN DATA CENTER FROM 2024 TO 2030(1) (1) Source: IEA, Energy and AI (2024-2030 outlook) (2) Source: IEA, Grid Readiness (3) Source: IEA, Electricity Grids and Secure Energy Transitions (2023) (4) Source: IEA, World Energy Outlook 2025 - Analysis (5) Source: GWEC – Global Wind Report 2025 Page 7 Nexans 2026 © All right Reserved| Business Deep-Dive Presentation | February 2026

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Nexans performance model towards Electrification Entering a phase of intensification 2019-2021 2021-2024 VALUE CREATION Page 8 Nexans 2026 © All right Reserved| Business Deep-Dive Presentation | February 2026 Electrification profitable growth momentum 2024-2028 Scaling & Excellence

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COMMERCIAL EXCELLENCE Scaling Nexans’ operations and business model for superior value creation All business units progressively catching up with Nexans’ best-in-class performers Scale industrial core capabilities • Mutualization of industrial footprint • Digital re-engineering • Automation at scale Scale operational excellence • Agile organization • Competitiveness initiatives • SHIFT AI • AI process efficiency Scale acquisitions • Replicating our business model • Delivering smooth integration INTENSIFY Scaling & Excellence Page 9 Nexans 2026 © All right Reserved| Business Deep-Dive Presentation | February 2026 INDUSTRIAL EXCELLENCE OPERATIONAL EXCELLENCE M&A EXCELLENCE Scale growth patterns & innovation • Data Center • Fire Safety • Renewables • Gigafactory Commercial swat teams

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Turning electrification selective growth into superior value creation Customized for each segment, repeatable and scalable OPERATIONAL VALUE CREATION ENGINE PWR-Transmission PWR-Grid PWR-Connect Industrial & Operational excellence Competitiveness Capacity Automation Digitalization Deployment of SHIFT Amplified by AI Commercial excellence & Innovative Tech Solutions M&A integration excellence Quality of Execution Selectivity of backlog Integrated Metallurgy: copper supply chain & copper recycling offer to our customers Page 10 Nexans 2026 © All right Reserved| Business Deep-Dive Presentation | February 2026

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S E C T I O N O 2 Business Deep-Dive Enhancing performance across the portfolio, leveraging structural drivers of value creation

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• Strong technical know-how & expertise • Long-term relationships with customers • State of the art cable laying vessels • European Strategic Sovereignty thanks to our backlog legacy projects progressively ending LONG-TERM CYCLE ACTIVITY with multi-year projects providing with good visibility WORLDWIDE MARKET capturing the needs for electrification FURTHER EBITDA MARGIN IMPROVEMENT Adjusted EBITDA (€m) and margin (%) 143 145 83 142 203 +42.8% 12.3% 17.9% 16.2% 9.5% 11.0% FY 21 FY 23 FY 24 FY 25FY 22 Structural drivers of value creation & agility of our operations Page 13 Nexans 2026 © All right Reserved| Business Deep-Dive Presentation | February 2026

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Page 14 Nexans 2026 © All right Reserved Industrial state-of-the-art manufacturing and cable laying vessels Team of best experts recognized by strategic customers Tyrrhenian Link Project, Italy December 2025 World-first installation depth of 2,150 meters | Business Deep-Dive Presentation | February 2026 Nexans, a highly recognized technological leadership

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SHORT-TERM AGILITY & MARKET DYNAMICS Strong adaptation to customer challenges STRONG AND DYNAMIC MARKET PIPELINE OF ACTIVITY Source: TGS | 4C market intelligence 5 75 25 12 Americas Europe 7 Middle-East China APAC excl. China INTENSIFY EFFICIENT PROCESSES QUALITY OF EXECUTION COMMERCIAL AGILITY Nexans, a key player with the technical know-how 124,000 KM OF CABLES TO BE INSTALLED OVER 2026-2040 Further strengthen visibility with a solid backlog and strong pipeline of activity Page 15 Nexans 2026 © All right Reserved| Business Deep-Dive Presentation | February 2026 (x 1,000 km)

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CASH FLOW GENERATIVE & LOW CAPEX intensive activity MEDIUM-TERM CYCLE ACTIVITY profile with very limited risks, with more & more extended duration of frame-agreements providing more visibility REGIONAL/LOCAL MARKETS STRUCTURAL VALUE CREATION DEMONSTRATED IN PWR-GRID & ACCELERATING WITH GROWTH Adjusted EBITDA (€m) and margin (%) 59 89 156 181 217 FY 21 FY 23 FY 24(1) FY 25FY 22 +19.4% 16.4% 6.7% 8.2% 13.2% 14.2% across all our BUs (Cable design, Recycling offer... ) to answer strong demand linked to modernization, monitoring and smart solutions related to the grid worldwide with our unique positioning providing us with pricing power to make low performers catch up with best-in-class Structural drivers of value creation thanks to high added-value solutions Page 17 Nexans 2026 © All right Reserved| Business Deep-Dive Presentation | February 2026 (1) Pro forma and restated, refer to FY 2025 results

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OF SHARE OF WALLET IN GRID DSO IN NEW VERTICALS OF INNOVATION IN ACCESSORIES TO Multi-year frame agreements with DSOs Capture large-scale projects such as gigafactories, data centers, renewables … Strong demand for Accessories across geographies RELIABILITY INSTALLATION TIME February 2026 Nexans data centers dedicated offer Share of global electricity used by data centers projected Scaling advanced offers and innovation for best-in-class customer experience Page 18 Nexans 2026 © All right Reserved| Business Deep-Dive Presentation | February 2026 (1) Source IEA, Energy and AI (2024 – 2030 outlook) INSTALLATION STEPS Leveraging low-carbon leadership, industrial backup & competitiveness

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OUR TARGET CUSTOMER EXPERIENCE LIFECYCLE SOLUTIONS TECHNOLOGY & DIGITAL STACK of revenue will shift to advanced offers by 2028 Scaling up our unique positioning on high added-value solutions OUR APPROACH Page 19 Nexans 2026 © All right Reserved| Business Deep-Dive Presentation | February 2026 INTENSIFY MUTUALIZATION ACROSS BUs DIFFERENTIATED OFFERS BY VERTICALS COMMERCIAL SWAT TARGETED M&A TEAMS

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Structural drivers of value creation thanks to SHIFT deployment & scale up of innovation thanks to unique positioning providing us with pricing power across all our BUs worldwide (i.e. Fire safety solutions) to make low performers catch up with best-in-class CASH FLOW GENERATIVE & LOW CAPEX intensive activity SHORT CYCLE ACTIVITY profile with very limited risks LOCAL MARKETS with contrasted patterns FURTHER EBITDA MARGIN IMPROVEMENT GRADUAL & PROGRESSIVE VALUE CREATION IMPROVEMENTS Adjusted EBITDA (€m) and margin (%) 125 221 229 271 289 FY 21 FY 23 FY 24(1) FY 25FY 22 +6.6% 12.3% 8.1% 12.0% 13.6% 13.1% Page 21 Nexans 2026 © All right Reserved| Business Deep-Dive Presentation | February 2026 (1) Pro forma and restated, refer to FY 2025 results

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Mobiway : scale across geographies a complete product range and offers & 2018 20262023 20242021 FR PT CHILCOL AUS LEBTÜR FR EU WORLD CAN CHIL 20252022 NZ AUS CANNZ Page 22 Nexans 2026 © All right Reserved| Business Deep-Dive Presentation | February 2026 All Mobiway offers: • Premium & Tech/IoT attributes • Growth enabler • Scale via digital visibility Strong dynamics of Mobiway since 2021: double-digit CAGR (2021-2025) organic growth embedding premium attributes High loyalty of end-users

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Enhance our positioning on high added-value solutions while strengthening our competitiveness CUSTOMER EXPERIENCE LIFECYCLE SOLUTIONS TECHNOLOGY & DIGITAL STACK of revenue will shift to advanced offers by 2028 OUR TARGET OUR APPROACH Page 23 Nexans 2026 © All right Reserved| Business Deep-Dive Presentation | February 2026 INTENSIFY COMPETITIVENESS INDUSTRIAL AUTOMATION EXPAND OUR ADVANCED SUPPLY CHAIN REGIONAL HUB TARGETED M&A OFFERS

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Delivering 2028 trajectory Through Nexans’ agile value creation model S E C T I O N O 3

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A model of profitable growth & solid cash generation A selective approach to further improve every business unit, catching up progressively with the Group best performers OUR VALUE CREATIONOUR GROWTH OUR CAPITAL ALLOCATION ADJUSTED EBITDA EXPANSION FREE CASH FLOW GENERATION Supported by Integrated metallurgy copper supply chain & copper recycling offer to our customers TARGETED M&A PWR-GRID & PWR-CONNECT SHAREHOLDER RETURN TARGETED M&A PWR-GRID & PWR-CONNECT SELECTIVE ORGANIC GROWTH L O W L E V E R A G E Page 25 Nexans 2026 © All right Reserved| Business Deep-Dive Presentation | February 2026 GROWTH CAPEX

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OUR EXISTING FOOTPRINT TO NEW GEOGRAPHIES EXPERTISE IN OUR PORTFOLIO Strategic rationale Page 26 Nexans 2026 © All right Reserved| Business Deep-Dive Presentation | February 2026 RICH PIPELINE INTEGRATION VIA SHIFT HIGHER EXECUTION RYTHM

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DISCIPLINED APPROACH TARGETING SHIFT IMPLEMENTATION PURCHASING POWER FOOTPRINT OPTIMIZATION LEVERAGING INNOVATION EXCELLENCE IN OUR INTEGRATION PROCESS ENHANCED OPERATIONAL PERFORMANCE SIGNIFICANT VALUE CREATION VALUE CREATING MODEL Adj. EBITDA X2 ADJUSTED EBITDA MARGIN NOW PART OF NEXAN’S BEST IN CLASS PERFORMERS Shifted to outperformer in 3 years REGIONAL OPTIMIZATION Page 27 Nexans 2026 © All right Reserved| Business Deep-Dive Presentation | February 2026

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Page 28 Nexans 2026 © All right Reserved| Business Deep-Dive Presentation | February 2026 Agility and discipline across the board PWR-Transmission PWR-Grid PWR-ConnectFY 2025 FY 2028E Commercial Growth Quality of Execution Backlog Volume growth Mix premium Industrial excellence Volume growth Mix premium Operational excellence Competitiveness €728m €1,150m (+/- €75m) + Additional M&A Adjusted EBITDA (m€)

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2028 guidance Page 29 Nexans 2026 © All right Reserved| Business Deep-Dive Presentation | February 2026 ADJ. EBITDA FCF CONVERSION(1) ROCE DIVIDEND PAYOUT(2) LEVERAGE GROUP ORGANIC SALES 2024-2028 CAGR (ELECTRIFICATION) (1) FCF pre-M&A and equity operations / Adj. EBITDA assuming flat change in WC (2) Share of recurring net income

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Selective & tech growth to amplify our path to electrification Simpler, more focused, ready to scale M&A and Commercial Excellence Industrial Operational Excellence CONTINUATION OF OUR STRATEGY UNIQUE POSITIONING Page 30 Nexans 2026 © All right Reserved| Business Deep-Dive Presentation | February 2026

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This presentation contains forward-looking statements which are subject to various expected or unexpected risks and uncertainties that could have a material impact on the Company’s future performance. Readers are also invited to visit the Group’s website where they can view and download Nexans’ Universal Registration Document,which includes a description of the Group’s risk factors. NB: any discrepancies are due to rounding. Contact: Audrey Bourgeois Telephone: +33 1 78 15 00 43 Email: audrey.bourgeois@nexans.com Page 31 Nexans 2026 © All right Reserved| Business Deep-Dive Presentation | February 2026

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Audrey Bourgeois VP Investor Relations +33 1 78 15 00 43 audrey.bourgeois@nexans.com

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