0000074303 2026-04-29 2026-04-29 0000074303 8-K/A true 2026-04-29 OLIN CORPORATION VA 1-1070 13-1872319 190 Carondelet Plaza Suite 1530 Clayton MO 63105 314 480-1400 false false false false Common Stock, $1.00 par value per share OLN NYSE false On April 30, 2026, Olin Corporation (the “Corporation”) filed a Current Report on Form 8-K (the “Original Form 8-K”) disclosing the voting results from its 2026 Annual Meeting of Shareholders held on April 30, 2026. The Corporation’s inspector of elections subsequently informed the Corporation of a typographical error in the results it reported to the Corporation for Proposal 4 (Ratification of appointment of KPMG LLP as independent registered public accounting firm for 2026) and provided corrected voting results for Proposal 4. Although the corrected voting results do not change the outcome for Proposal 4, the Corporation is filing this Amendment No. 1 to the Original Form 8-K to provide the corrected information received from its inspector of elections. The corrected voting results provided below replace the results previously disclosed with respect to Proposal 4 in the Original Form 8-K. No other changes have been made to the Original Form 8-K.