X0306 4/A 2018-05-14 2019-03-05 0 0000074303 OLIN Corp OLN 0001220616 LARRIMORE RANDALL W C/O OLIN CORPORATION 190 CARONDELET PLAZA, SUITE 1530 CLAYTON MO 63105 1 0 0 0 Common Stock $1 par value 2018-05-14 5 J 0 E 29263 0.00 D 29502 I GRAT Common Stock $1 par value 2018-05-14 5 J 0 E 29263 0.00 A 29263 I by Revocable Trust Common Stock $1 par value 2019-03-01 4 A 0 1568 25.513 A 30831 I by Revocable Trust Common Stock $1 par value 5200 I by Trust Phantom Stock Units 2019-03-01 4 A 0 4892 25.513 A Common Stock 4892 20927 D Return of common stock to the reporting person from GRAT in satisfaction of an annuity obligation, constituting an exempt change in beneficial ownership. Original filing failed to report the change in beneficial ownership from GRAT to the Revocable Trust. Shares of Common Stock granted under the Amended and Restated 1997 Stock Plan for Non-employee Directors, the Company's formula director compensation plan. Original filing failed inadvertently to report the change in beneficial ownership from GRAT to the Revocable Trust. The reporting person disclaims beneficial ownership of the shares held by this trust. Phantom shares of common stock are also credited periodically to a deferred stock account under the Amended and Restated 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-to-one basis. /s/ T. E. Murphy, Attorney-in-Fact 2019-09-25