OLIN Corp — Director's Dealing 2025

Aug 15, 2025

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: OLIN Corp (OLN)
CIK: 0000074303
Period of Report: 2025-08-13

Reporting Person: VERMILLION TERESA M (VP & Treasurer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2025-08-13	Common Stock	M	6000	$13.14	Acquired	23199	Direct
2025-08-13	Common Stock	S	6000	$21.107	Disposed	17199	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2025-08-13	Employee Stock Options (Right to Buy)	$13.14	M	6000	Disposed	2026-02-11	Common Stock (6000)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	140.7607	Indirect

Footnotes

F1: Amount includes 427.769 shares held under dividend reinvestment plans acquired periodically in transactions, which are exempt from Section 16(b).

F2: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $21.07 to $21.135, inclusive. The reporting person undertakes to
provide to Olin Corporation, any security holder of Olin Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each
separate price within the ranges set forth in this footnote (2) to this Form 4.

F3: The figure represents shares of Olin Common Stock held under the Olin Corporation Retirement Savings Plan, a tax conditioned plan reflecting transactions exempt under Rule 16b-3, as reported by
the RSP Plan Administrator as of August 13, 2025.