Teresa M. Vermillion - 18 Feb 2026 Form 4 Insider Report for OLIN Corp (OLN)

Role
VP & Treasurer
Signature
/s/ E.C. Tanner, Attorney-in-Fact
Issuer symbol
OLN
Transactions as of
18 Feb 2026
Net transactions value
$0
Form type
4
Filing time
20 Feb 2026, 16:14:05 UTC
Previous filing
28 Nov 2025
Next filing
24 Feb 2026
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
VERMILLION TERESA M VP & Treasurer C/O OLIN CORPORATION, 190 CARONDELET PLZ, STE 1530, CLAYTON /s/ E.C. Tanner, Attorney-in-Fact 20 Feb 2026 0001729998

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction OLN Common Stock Award $0 +79 +0.46% $0.000000 17,278 18 Feb 2026 Direct
holding OLN Common Stock 141 18 Feb 2026 By RSP Trustee F1

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
transaction OLN Restricted Stock Units Award $0 +8,004 $0.000000 8,004 18 Feb 2026 Common Stock 8,004 Direct F2, F3
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
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.