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T h i r d Q u a r t e r 2 0 2 6 E a rn i n g s C a l lO c t o b e r 3 0 , 2 0 2 6
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3 Q 2 6 E A R N I N G S Forward-looking Statements 2 This presentation includes forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. These statements relate to analyses and other information that are based on management's beliefs,certain assumptions made by management, forecasts of future results, and current expectations, estimates and projections about the markets and economy in which we and our various segments operate. These statements mayinclude statements regarding our definitive agreement with Huntsman Corporation (Huntsman) to combine in an all-stock merger of equals transaction (the Merger), the expected timetable for completing the Merger, benefits andsynergies of the Merger, and future opportunities for the combined company following the Merger. The statements contained in this communication that are not statements of historical fact may include forward-looking statementsthat involve a number of risks and uncertainties.We use separate “outlook” sections, reference future phases of Olin’s evolution, and use the words "anticipate," "intend," "may," "expect," "believe," "should," "plan," "outlook," "project," "estimate," "forecast," "optimistic," “target,” andvariations of such words and similar expressions in this presentation to identify such forward-looking statements. These statements are not guarantees of future performance and involve certain risks, uncertainties, and assumptions,which are difficult to predict and many of which are beyond our control. Therefore, actual outcomes and results may differ materially from those matters expressed or implied in such forward-looking statements. The payment of cashdividends is subject to the discretion of our Board of Directors and will be determined in light of then-current conditions, including our earnings, our operations, our financial conditions, our capital requirements and other factors deemedrelevant by our Board of Directors. In the future, our Board of Directors may change our dividend policy, including the frequency or amount of any dividend, in light of then-existing conditions. All references to expectations and otherforward-looking statements are based on July 31, 2026. Olin undertakes no obligation to update publicly any forward-looking statements, whether as a result of future events, new information or otherwise.Factors that could cause or contribute to such differences include, but are not limited to: sensitivity to economic, business and market conditions in the United States and overseas, including economic instability or a downturn in thesectors served by us; declines in average selling prices for our products and the supply/demand balance for our products, including the impact of excess industry capacity or an imbalance in demand for our chlor alkali products;unsuccessful execution of our operating model, which prioritizes Electrochemical Unit (ECU) margins over sales volumes; failure to control costs and inflation impacts or failure to achieve targeted cost reductions; availability of and/orhigher-than-expected costs of raw material, energy, transportation, and/or logistics; our reliance on a limited number of suppliers for specified feedstock and services and our reliance on third-party transportation; the occurrence ofunexpected manufacturing interruptions and outages, including those occurring as a result of labor disruptions and production hazards; exposure to physical risks associated with climate-related events or increased severity andfrequency of severe weather events; the failure or an interruption, including cyber-attacks, of our information technology systems; risks associated with our international sales and operations, including economic, political or regulatorychanges; weak industry conditions affecting our ability to comply with the financial maintenance covenants in our debt agreements; our indebtedness and debt service obligations; failure to identify, attract, develop, retain and motivatequalified employees throughout the organization and ability to manage executive officer and other key senior management transitions; adverse conditions in the credit and capital markets, limiting or preventing our ability to borrow orraise capital; our inability to complete future acquisitions or joint venture transactions or successfully integrate them into our business; the effects of any declines in global equity markets on asset values and any declines in interest ratesor other significant assumptions used to value the liabilities in, and funding of, our pension plans; our long-range plan assumptions not being realized, causing a non-cash impairment charge of long-lived assets; changes in, or failure tocomply with, legislation or government regulations or policies, including changes regarding our ability to manufacture or use certain products and changes within the international markets in which we operate; new regulations or publicpolicy changes regarding the transportation of hazardous chemicals and the security of chemical manufacturing facilities; unexpected outcomes from legal or regulatory claims and proceedings; costs and other expenditures in excessof those projected for environmental investigation and remediation or other legal proceedings; various risks associated with our Lake City U.S. Army Ammunition Plant contract and performance under other governmental contracts;factors relating to the satisfaction of the conditions to, and timely completion of, the proposed Merger with Huntsman, including required regulatory approvals; the possibility that the proposed Merger may not be completed on theanticipated terms, timing, or at all, including the possibility of circumstances that would require us to pay a termination fee; the possibility that the expected strategic benefits, cost savings, operational efficiencies and synergies of theproposed Merger may not be realized or may take longer to realize than expected; the effect of the proposed Merger on relationships with employees, customers, suppliers and other business partners and adverse effects on our ability toattract, retain and motivate key personnel, maintain commercial relationships and execute our business strategy; the diversion of management attention from day-to-day operations and other strategic opportunities; transaction, advisory,legal, accounting, consulting, regulatory, retention, integration planning costs and other costs associated with the proposed Merger; the Merger Agreement contains customary covenants that restrict our ability to undertake certainactions without Huntsman’s consent prior to closing, which may limit operational flexibility and the ability to pursue certain business opportunities during the pendency of the Merger; the risk of litigation, regulatory proceedings relating tothe proposed Merger, or the imposition of conditions, limitations, divestiture requirements or other remedies by governmental authorities; and the other risks detailed in Olin’s Form 10-K for the fiscal year ended December 31, 2025 and inOlin’s Quarterly Reports on Form 10-Q and other reports furnished or filed with the U.S. Securities and Exchange Commission. All of our forward-looking statements should be considered in light of these factors. In addition, other risksand uncertainties not presently known to us or that we consider immaterial could affect the accuracy of our forward-looking statements. The reader is cautioned not to rely unduly on these forward-looking statements.Non-GAAP Financial Measures:In addition to U.S. GAAP financial measures, this presentation includes certain non-GAAP financial measures including EBITDA and Adjusted EBITDA. These non-GAAP measures are in addition to, not asubstitute for or superior to, measures for financial performance prepared in accordance with U.S. GAAP. Definitions of these measures and reconciliation of GAAP to non-GAAP measures are provided in the appendix to thispresentation.
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3 Q 2 6 E A R N I N G S Key 3Q26 Highlights1Stable domestic ECU values; lower export caustic soda and EDC values2VCM assets returned to normal operations3Epoxy business benefited from improved cost structure and growth in Formulated Solutions4Improved Winchester commercial pricing and demand5Overwhelming shareholder approval of Huntsman merger 3 Q 2 6 E A R N I N G S3
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3 Q 2 6 E A R N I N G S OlinHuntsman Merger of Equals – Transaction Update Creating a $12B+ North American Chemicals LeaderNew Ticker – NYSE: OHN – Upon Closing1 We now expect the transaction to close in first quarter 2027, subject to customary closing conditions.4 Key MilestonesJun 16: Merger agreement announced Jul 9:Shareholder record dateJul 13:Proxy/S-4 became definitiveAug 17:Pre-close integration planning beginsAug 25: Special Shareholder MeetingSep 11:U.S. Hart-Scott-Rodino expirationOct 27:OlinHuntsman Credit AgreementIn Process:Ongoing regulatory approvalsExpected close: 1Q271•Overwhelming shareholder support•Merger clearances already received from the U.S. and Brazil, all other required reviews are in progress•New OlinHuntsman Credit Agreement secures continuity of Day 1 financing•Integration planning accelerating in line with closing•Creating a new Company, implementing a lean and fit-for-purpose organizational design•Improved confidence in delivery of $400 million synergy benefit•Deleveraging remains top priority for free cash flowMerger now expected to close first quarter 20271
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3 Q 2 6 E A R N I N G S Chlor Alkali Products & Vinyls Segment Performance 5 Adjusted EBITDA ($M)Sales ($M)$924 $820 $851 3Q25 2Q26 3Q26$237 $152 $162 3Q25 2Q26 3Q26 Sequential Highlights •VCM assets returned to normal operations•EDC values declined, but remain above pre-conflict, on elevated volume•Improved domestic caustic values; export caustic under pressure from Asia•Strong seasonal water treatment demandActions•Continuing our value-based commercial approach •Delivering Beyond250 savingsLooking Ahead•Heightened 4Q seasonality•Elevated 4Q turnaround spending
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3 Q 2 6 E A R N I N G S Epoxy Segment Performance 6 Adjusted EBITDA ($M)Sales ($M)$350 $422 $412 3Q25 2Q26 3Q26$(19)$28 $12 3Q25 2Q26 3Q26 Sequential Highlights •Europe realized no seasonal demand improvement •Margins pressured by higher hydrocarbon costs•Growing high-value formulated solutions volumeActions•Price initiatives to offset rising hydrocarbon costs•Supporting EU Safeguards initiativeLooking Ahead•Higher 4Q turnaround costs•Continued weak global demand •Rising hydrocarbon costs
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3 Q 2 6 E A R N I N G S Actions•Continued price actions to offset cost escalations•Accelerating Beyond250 savingsLooking Ahead•YTD 2026 NICS1background checks up YoY•Tariffs continue to limit U.S. ammunition importsWinchester Segment Performance 7 Adjusted EBITDA ($M)Sales ($M)$440 $500 $485 3Q25 2Q26 3Q26$27 $37 $43 3Q25 2Q26 3Q26 Sequential Highlights •Commercial volumes continue to improve•Commercial ammunition price gains outpaced by rising metals costs•More than $1B of new military contract awards 1 Year to date National Instant Criminal Background System (NICS) checks for firearm purchases through September 2026 totaled 10.6 million, 3.0% above the first nine months of 2025.
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3 Q 2 6 E A R N I N G S Financial Highlights 1 In addition to the bond maturities noted below, gross debt as of 9/30/26 also includes a $528.1M term loan facility, $170.0M senior revolving credit facility and $465.0M receivables financing agreement, which maturities are excluded herein.8 Highlights•Expect YE26 net debt to increase over YE25, due to legacy litigation payments and acquisition-related costs•Cash taxes ~$10 million•On track to deliver $110-120 million Beyond250 savings Cash Positions(as of 9/30/26)•Cash on hand: $214.8M•Available liquidity: $1.3B Cash Management Priorities•Preserving and enhancing liquidity•Fund sustaining capital spending to assure safe and reliable asset operation•Continue 100+ years of dividend reliability•Excess cash flow expected to be used to repay debt•Targeting YE26 leverage ratio of ~5x or slightly higher3Q262Q261Q264Q25Summary Balance Sheet214.8177.4192.2167.6Cash & Cash Equivalents ($M)2,798.32,851.72,803.92,659.7Net Debt ($M)5.2x5.0x5.1x4.1xTTM Net Debt to Adj. EBITDA Bond Maturity Profile1($M)$669 $515 $683 2026 2027 2028 2029 2030 2031 2032 2033-2035
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3 Q 2 6 E A R N I N G S CAPV Epoxy Winchester 4Q26 Outlook 4Q26 adjusted EBITDA expected to be in the range of $80 - $100 million9 •Caustic export market tightening with sequential price momentum •EDC pricing finding support from high global feedstocks•Higher planned maintenance turnaround costs•Significantly higher planned maintenance turnaround costs•European demand remains weak; US demand slowing seasonally•Implementing price increases to offset rising hydrocarbon costs•Seasonally lower commercial ammunition demand•Higher commodity metal costs•Continued focus on commercial discipline
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3 Q 2 6 E A R N I N G SQ&A 10
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3 Q 2 6 E A R N I N G SAppendix11
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3 Q 2 6 E A R N I N G S $191 $11 $(16)$6 $(1)$191 2Q26 CAPV Epoxy Winchester Corporate 3Q26 3Q26 vs. 2Q26 Adjusted EBITDA Bridge ($M) 12 +Higher Formulated Solutions volume-Lower aromatics and Epi pricing-Higher raw material costs, primarily benzene and propylene+Higher caustic soda and water treatment volume+Higher VCM operating rates-Lower export caustic soda and EDC pricing+Improved commercial pricing and volume-Higher raw material costs, primarily commodity metals costsComparable
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3 Q 2 6 E A R N I N G S Beyond250 Driving Sustainable Operational Excellence On track to deliver Beyond250 structural cost savings by 20281132025A 2026E 2027E 2028E 2029E Projected Beyond250Annual Added Savings •Realtime visual KPI control room dashboards driving improved yield performance •Expanding preventative maintenance and asset-criticality focus to improve equipment reliability•Transformation permanence supported by our enterprise Performance Management System and Manufacturing Center of Excellence continuous audit assessments•Winchester Beyond250 well underway at Lake City site•Expanding the pipeline of structural cost reduction to drive continuous improvement and long-term value creation•Completed ~600 employee and contractor position eliminations CAPV~$150M Epoxy~$80M Winchester~$30MActions UnderwayInvestor Day Targets$44$250+$60-80$110-120$50-60 1 Expect to deliver year-end 2028 run rate savings of at least $250 million.
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3 Q 2 6 E A R N I N G S Outlook: Full Year 2026 Modeling Assumptions 14 Key ElementsForecast ($M)Line ItemExpected to be lower than 2025 levels~$200Capital SpendingExpected to be lower than 2025 levels~$470Depreciation & AmortizationExpected to be lower than 2025 income levels$10 to $15Non-Operating Pension IncomeSpending and expense are expected to be similar$25 to $30Environmental ExpenseExpected to increase from 2025 levels, higher stock-based and incentive compensation, and less favorable foreign currency impact$95 to $105Other CorporateExpected to be similar to 2025 levels~$30Restructuring and Other CostsIncludes advisory, legal, accounting and professional fees incurred in connection with the merger and integration$35 to $40Acquisition-Related CostsExpected to be similar to 2025; ~40% of debt at variable interest rates~$175Interest Expense, NetFederal, state and foreign income taxes, partially offset by favorable book / tax deductions. 15% to 25%Book Tax ProvisionForecast of cash taxes includes expected refunds from prior years related to Inflation Reduction Act Section 45V clean hydrogen production tax credits~$10Cash Taxes Payment
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3 Q 2 6 E A R N I N G S Delivering on Our Value Strategy 1Includes all produced merchant chlorine, merchant caustic, chlorine containing derivatives, including chlorinated organics, bleach, hydrochloric acid, ethylene dichloride (EDC), vinyl chloride monomer (VCM), allyl chloride, epichlorohydrin, and epoxy resins. Excludes one consumer with a cost-based, long-term supply agreement. 2Sales volumes from produced volumes in the denominator are harmonized to their chlorine/caustic soda content, i.e., back to the ECU content. 3Excludes one-time net benefits of $99.9M associated with Winter Storm Uri.15 3Q26 Profit Contribution Index (ECU PCI)100 = Q1 2020Sequential Olin Pricing Comparison3Q26 vs. 2Q26ChlorineCaustic SodaEDCBleachHClChlorinated OrganicsAromaticsEpichlorohydrin / Allyl ChlorideLiquid Epoxy ResinsAmmunition 10093100106148192222238261294255287262257211191180207172187168186157153153167169 1Q202Q203Q204Q201Q212Q213Q214Q211Q222Q223Q224Q221Q232Q233Q234Q231Q242Q243Q244Q241Q252Q253Q254Q251Q262Q263Q26Olin - ECU PCI3IndexTotal variable margin of all products utilizing chlorine or caustic soda1 / total ECU sales volume2
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3 Q 2 6 E A R N I N G S Maintenance Turnaround Expenses1 1Maintenance turnaround expenses includes maintenance expense and unabsorbed fixed cost penalty.16•CAPV – Freeport, TX ethylene dichloride/vinyl chloride monomer turnaround(1Q26/2Q26)•CAPV – Various regional plant turnarounds(2Q26/3Q26)•CAPV – Freeport, TX; Plaquemine, LA and regional plant turnarounds(4Q26)•Epoxy – Freeport, TX allyl chloride/epichlorohydrin turnaround(3Q26/4Q26) Epoxy ($M)Chlor Alkali Products & Vinyls ($M) $14 $39 $41 $47 $141 $47 $42 $25 $50 $164 Q1 Q2 Q3 Q4 Full Year $2 $9 $2 $14 $27 $1 $3 $4 $34 $42 Q1 Q2 Q3 Q4 Full YearActual 2025 Actual 2026 Forecast 2026Actual 2025 Actual 2026 Forecast 2026
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3 Q 2 6 E A R N I N G S Non-GAAP Financial Measures – Adjusted EBITDA1 17Nine Months EndedSeptember 30,Three Months EndedSeptember 30,2025202620252026($ in millions)Reconciliation of Net Income (Loss) to Adjusted EBITDA:$42.1 ($81.9) $43.7 $14.4 Net Income (Loss)Add Back:138.1130.945.244.5Interest Expense, Net(5.3)(15.5)(2.2)2.7Income Tax Provision (Benefit)395.9353.7133.8114.4Depreciation and Amortization570.8387.2220.5176.0EBITDAAdd Back:14.321.32.91.7Restructuring Charges(1.0)-(1.0)-Environmental Recoveries-36.1--Legacy Litigation Matters-24.3-13.7Acquisition-related Costs2 $584.1$468.9$222.4$191.4Adjusted EBITDA Olin's definition of Adjusted EBITDA (earnings before interest, taxes, depreciation, and amortization) is net income (loss) plus an add-back for depreciation and amortization, interest expense (income), income tax provision (benefit), other expense (income), restructuring charges (income) and certain other non-recurring items. Adjusted EBITDA is a non-GAAP financial measure. Management believes that this measure is meaningful to investors as a supplemental financial measure to assess the financial performance without regard to financing methods, capital structures, taxes or historical cost basis. The use of non-GAAP financial measures is not intended to replace any measures of performance determined in accordance with GAAP and Adjusted EBITDA presented may not be comparable to similarly titled measures of other companies. Reconciliation of forward-looking non-GAAP financial measures to the most directly comparable GAAP financial measures are omitted from this release because Olin is unable to provide such reconciliations without the use of unreasonable efforts. This inability results from the inherent difficulty in forecasting generally and quantifying certain projected amounts that are necessary for such reconciliations. In particular, sufficient information is not available to calculate certain adjustments required for such reconciliations, including interest expense (income), income tax provision (benefit), other expense (income) and restructuring charges (income). Because of our inability to calculate such adjustments, forward-looking net income guidance is also omitted from this release. We expect these adjustments to have a potentially significant impact on our future GAAP financial results. 1Unaudited. 2Acquisition-related costs for the three and nine months ended September 30, 2026 included advisory, legal, accounting, and other professional fees associated with our proposed merger with Huntsman Corporation.
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3 Q 2 6 E A R N I N G S Non-GAAP Quarterly Financial Measures by Segment1 1Unaudited. 2Acquisition-related costs for the three months ended September 30, 2026 and June 30, 2026 included advisory, legal, accounting, and other professional fees associated with our proposed merger with Huntsman Corporation. 18 Three Months EndedSeptember 30, 2025Three Months EndedJune 30, 2026Three Months EndedSeptember 30, 2026Adjusted EBITDADepr and AmortReconciling ItemsIncome (Loss) before TaxesAdjusted EBITDADepr and AmortReconciling ItemsIncome (Loss) before TaxesAdjusted EBITDADepr and AmortReconciling ItemsIncome (Loss) before Taxes($ in millions)$236.6$109.0-$127.6$151.5$98.1-$53.4$162.4$91.1-$71.3Chlor Alkali Products & Vinyls(19.0)13.2-(32.2)27.711.7-16.011.711.1-0.6Epoxy27.17.8-19.336.98.8-28.142.89.0-33.8Winchester244.7130.0-114.7216.1118.6-97.5216.9111.2-105.7Corporate / Other:(5.5)-(1.0)(4.5)(5.7)--(5.7)(5.6)--(5.6)Environmental Expense(22.1)3.8-(25.9)(21.8)3.5-(25.3)(23.5)3.2-(26.7)Other Corp & Unallocated Costs--2.9(2.9)--10.5(10.5)--1.7(1.7)Restructuring Charges------10.6(10.6)--13.7(13.7)Acquisition-related Costs2 0.4--0.40.1--0.10.3--0.3Other Operating Income --45.2(45.2)--44.3(44.3)--44.5(44.5)Interest Expense, Net4.9--4.92.6--2.63.3--3.3Non-operating Pension Income$222.4$133.8$47.1$41.5$191.3$122.1$65.4$3.8$191.4$114.4$59.9$17.1Olin Corporation
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3 Q 2 6 E A R N I N G S Non-GAAP YTD Financial Measures by Segment1 1Unaudited.2Chlor Alkali Products and Vinyls reconciling items for the nine months ended September 30, 2026 included $36.1 million in pretax charges associated with legacy litigation matters. 3Acquisition-related costs for the nine months ended September 30, 2026 included advisory, legal, accounting, and other professional fees associated with our proposed merger with Huntsman Corporation.19 Nine Months EndedSeptember 30, 2025Nine Months EndedSeptember 30, 2026Adjusted EBITDADepr and AmortReconciling ItemsIncome (Loss) before TaxesAdjusted EBITDADepr and AmortReconciling ItemsIncome (Loss) before Taxes($ in millions)$593.3$322.5-$270.8$398.7$282.4$36.1$80.2Chlor Alkali Products & Vinyls2 (45.2)39.1-(84.3)48.434.7-13.7Epoxy92.325.2-67.1103.826.7-77.1Winchester640.4386.8-253.6550.9343.836.1171.0Corporate / Other:(15.3)-(1.0)(14.3)(16.5)--(16.5)Environmental Expense(56.7)9.1-(65.8)(75.3)9.9-(85.2)Other Corp and Unallocated Costs--14.3(14.3)--21.3(21.3)Restructuring Charges------24.3(24.3)Acquisition-related Costs3 0.2--0.20.4--0.4Other Operating Income--138.1(138.1)--130.9(130.9)Interest Expense, Net15.5--15.59.4--9.4Non-operating Pension Income$584.1$395.9$151.4$36.8$468.9$353.7$212.6($97.4)Olin Corporation