VERMILLION TERESA M 4
4 · OLIN Corp · Filed Feb 24, 2026
Insider Transaction Report
Form 4
OLIN CorpOLN
VERMILLION TERESA M
VP & Treasurer
Transactions
- Exercise/Conversion
Common Stock
[F1]2026-02-20+2,318→ 19,596 total - Tax Payment
Common Stock
2026-02-20$24.09/sh−674$16,237→ 18,922 total - Exercise/Conversion
Restricted Stock Units
[F1][F3]2026-02-20−2,318→ 4,634 total→ Common Stock (2,318 underlying)
Holdings
- 140.761(indirect: By Trust)
Common Stock
[F2]
Footnotes (3)
- [F1]Restricted stock units convert into common stock on a one-on-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 6,952 restricted stock units, 2,318 shares vested on February 20, 2026, 2,317 shares vest on February 20, 2027 and 2,317 shares vest on February 20, 2028.
Signature
/s/ E.C. Tanner, Attorney-in-Fact|2026-02-24