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• The Subsidiary Merger Proposal was approved with 91,954,959 votes for, 3,190,072 against, and 283,110 abstentions.
• The advisory say-on-pay proposal for named executive officer compensation was approved with 87,862,384 votes for, 7,105,019 against, and 460,738 abstentions.
• The Adjournment Proposal was not submitted because sufficient votes were present to approve the merger proposals.
• The transaction is expected to close in the first half of 2027, subject to regulatory approvals and other customary closing conditions.

5.07 Submission of Matters to a Vote of Security Holders · 7.01 Regulation FD Disclosure · 9.01 Financial Statements and Exhibits

• Olin voluntarily amended the joint proxy statement/prospectus with supplemental disclosures, without admitting legal necessity or materiality.
• Supplemental disclosures include details on Lazard's DCF analysis, selected public company multiples, and Citi's financial analyses.
• Special meetings of Olin shareholders and Huntsman stockholders to vote on the merger are scheduled for August 25, 2026.
• Olin's board continues to unanimously recommend voting 'FOR' all merger-related proposals.

8.01 Other Events

• The dividend is payable on September 11, 2026, to shareholders of record as of August 27, 2026.
• This marks Olin's 399th consecutive quarterly dividend.
• The report was filed under Item 7.01 Regulation FD Disclosure, indicating the dividend declaration was disclosed voluntarily.
• The filing also includes the cover page interactive data file as an exhibit under Item 9.01.

7.01 Regulation FD Disclosure · 9.01 Financial Statements and Exhibits

• Second quarter 2026 net loss was ($13.3) million, or ($0.12) per diluted share, compared to a net loss of ($1.3) million in Q2 2025.
• Adjusted EBITDA was $191.3 million in Q2 2026, up from $176.1 million in Q2 2025.
• An unplanned shutdown of the vinyl chloride monomer plant in Freeport, Texas reduced Q2 adjusted EBITDA by $40 million, with an estimated $20 million impact expected in Q3.
• Q3 2026 adjusted EBITDA is forecast to be in the range of $160 million to $200 million.

2.02 Results of Operations and Financial Condition · 9.01 Financial Statements and Exhibits

• Olin Corporation and Huntsman Corporation entered into a definitive Agreement and Plan of Merger on June 15, 2026, for an all-stock merger of equals.
• The combined company is expected to be a $12+ billion integrated North American chemicals leader.
• Ken Lane will serve as CEO and Peter Huntsman as non-executive Chairman of the combined company's board.
• The transaction was disclosed under Item 7.01 Regulation FD via a joint press release and investor presentation dated June 16, 2026.

7.01 Regulation FD Disclosure · 9.01 Financial Statements and Exhibits

• Olin Corporation and Huntsman Corporation entered into a definitive merger agreement on June 15, 2026, in an all-stock merger of equals.
• The combined company will be named OlinHuntsman Corporation, headquartered in The Woodlands, Texas, with Kenneth Lane as CEO and Peter Huntsman as non-executive Chair.
• The transaction requires shareholder approvals (Olin: two-thirds for direct merger or majority for share issuance; Huntsman: adoption of agreement) and regulatory clearances, with an outside date of one year, extendable by up to six months.
• A termination fee of $121 million may be payable under certain circumstances, and the boards of both companies unanimously approved the deal.

1.01 Entry into a Material Definitive Agreement · 8.01 Other Events · 9.01 Financial Statements and Exhibits

• Adjusted EBITDA was $86.2 million in Q1 2026, compared to $185.6 million in Q1 2025.
• Chlor Alkali Products and Vinyls segment reported a loss of $44.5 million, down from earnings of $78.3 million a year ago.
• Epoxy segment loss narrowed to $2.9 million from $28.4 million, while Winchester earnings fell to $15.2 million from $22.8 million.
• Company forecasts Q2 2026 adjusted EBITDA in the range of $160 million to $200 million.

2.02 Results of Operations and Financial Condition · 9.01 Financial Statements and Exhibits

• Shareholders approved the Olin Corporation 2026 Long Term Incentive Plan at the April 30, 2026 annual meeting, effective immediately.
• All eight director nominees were elected, including Beverley A. Babcock, Edward M. Daly, Matthew S. Darnall, Kenneth T. Lane, Julie A. Piggott, Earl L. Shipp, William H. Weideman, and Carol A. Williams.
• Shareholders also approved, on an advisory basis, executive compensation and ratified KPMG LLP as independent auditor for 2026.
• The board declared a quarterly dividend of $0.20 per share, payable June 12, 2026, marking the 398th consecutive quarterly dividend.

5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements · 5.03 Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year · 5.07 Submission of Matters to a Vote of Security Holders · 7.01 Regulation FD Disclosure · 9.01 Financial Statements and Exhibits