OLIN Corp — Director's Dealing 2026

Feb 24, 2026

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: OLIN Corp (OLN)
CIK: 0000074303
Period of Report: 2026-02-20

Reporting Person: Sumner R Nichole (VP & Controller)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2026-02-20	Common Stock	M	1835	—	Acquired	26685	Direct
2026-02-20	Common Stock	F	538	$24.09	Disposed	26147	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2026-02-20	Restricted Stock Units	$	M	1835	Disposed		Common Stock (1835)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	9452.6705	Indirect

Footnotes

F1: Restricted stock units convert into common stock on a one-to-one basis.

F2: 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.

F3: On February 20, 2025 the reporting person was granted 5,504 restricted stock units, 1,835 shares vested on February 20, 2026, 1,835 shares vest on February 20, 2027 and 1,834 shares vest on February 20, 2028.