R. Nichole Sumner - 20 Feb 2026 Form 4 Insider Report for OLIN Corp (OLN)

Reporting relationship: VP & Controller
Issuer ticker: OLN
Reported as of: 20 Feb 2026
Net transaction value: -$12,960
SEC form: 4
Accepted by SEC: 24 Feb 2026, 17:20:47 UTC
Prior SEC filing: 20 Feb 2026
Source filing: View source filing
Reporting owner signature: /s/ E.C. Tanner, Attorney-in-Fact

Key filing fact

R. Nichole Sumner filed Form 4 for OLIN Corp (OLN) on 24 Feb 2026.

Key facts

This page summarizes R. Nichole Sumner's Form 4 filing for OLIN Corp (OLN).
3 reported transactions and 1 derivative row are listed below.
Accepted by SEC: 24 Feb 2026, 17:20.

Change

Previous filing in this sequence was filed on 20 Feb 2026.
Current net transaction value: -$12,960.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001607503 Primary reporting owner

Sumner R Nichole

Relationship: VP & Controller
Address: C/O OLIN CORPORATION, 190 CARONDELET PLZ, STE 1530, CLAYTON
Signature: /s/ E.C. Tanner, Attorney-in-Fact
Signature date: 24 Feb 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

OLN transaction

Common Stock

Options Exercise

Transaction value
Shares: +1,835
Change %: +7.4%
Price
Shares after: 26,685
Date: 20 Feb 2026
Ownership: Direct
Footnotes: F1

OLN transaction

Common Stock

Tax liability

Transaction value: $12,960
Shares: -538
Change %: -2%
Price: $24.09
Shares after: 26,147
Date: 20 Feb 2026
Ownership: Direct

OLN holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 9,453
Date: 20 Feb 2026
Ownership: By RSP Trustee
Footnotes: F2

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

OLN transaction Derivative

Restricted Stock Units

Options Exercise

Transaction value: $0
Shares: -1,835
Change %: -33%
Price: $0.000000
Shares after: 3,669
Date: 20 Feb 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 1,835
Exercise price
Footnotes: F1, F3

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 3 footnotes

Footnote F1

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

Footnote 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.

Footnote 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.