X0306 4 2022-05-02 0 0000074303 OLIN Corp OLIN 0001658919 Ferguson Scott D. 250 WEST 55TH STREET 34TH FLOOR NEW YORK NY 10019 1 0 0 0 0001582090 Sachem Head Capital Management LP 250 WEST 55TH STREET 34TH FLOOR NEW YORK NY 10019 1 0 0 0 0001658906 Uncas GP LLC 250 WEST 55TH STREET 34TH FLOOR NEW YORK NY 10019 1 0 0 0 0001658917 Sachem Head GP LLC 250 WEST 55TH STREET, 34TH FLOOR NEW YORK NY 10019 1 0 0 0 Phantom Stock Units 2022-05-02 4 A 0 2000 58.95 A Common Stock 2000 12700 D Pursuant to an arrangement between Mr. Ferguson and Sachem Head Capital Management LP ("Sachem Head"), the Shares and Phantom Stock Units are held by Mr. Ferguson for the benefit of Sachem Head. Such units are included as directly beneficially owned by Mr. Ferguson, but may also be deemed to be beneficially owned by Sachem Head and Uncas GP LLC, Sachem Head's General Partner, as a result of such arrangements. Each of the Reporting Persons disclaims beneficial ownership of the reported securities except to the extent of his or its pecuniary interest therein. Phantom shares of common stock are credited periodically to a deferred stock account under the Amended and Restated Olin Corporation 1997 Stock Plan for Non-employee Directors and are settled in common stock or cash following the date the reporting person ceases to be a director. Security converts to common stock on a one-for-one basis. /s/ Michael D. Adamski, as General Counsel 2022-05-03 /s/ Michael D. Adamski, as Attorney-in-Fact 2022-05-03 /s/ Michael D. Adamski, as General Counsel 2022-05-03 /s/ Michael D. Adamski, as General Counsel 2022-05-03