OLIN Corp — Director's Dealing 2026

Feb 20, 2026

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: OLIN Corp (OLN)
CIK: 0000074303
Period of Report: 2026-02-18

Reporting Person: VERMILLION TERESA M (VP & Treasurer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2026-02-18	Common Stock	A	79	—	Acquired	17278	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2026-02-18	Restricted Stock Units	$	A	8004	Acquired		Common Stock (8004)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	140.7607	Indirect

Footnotes

F1: The figure represents shares of Olin Common Stock held under the Olin Corporation Retirement Savings Plan (RSP), a tax conditioned plan reflecting transactions exempt under Rule 16b-3, as reported by the RSP Plan Administrator as of February 20, 2026.

F2: Restricted stock units convert into common stock on a one-to-one basis.

F3: These restricted stock units vest in three annual installments beginning on February 18, 2027.