X0306 4 2018-03-09 0 0000074303 OLIN CORP OLN 0001373207 Benoist Gray G C/O OLIN CORPORATION 190 CARONDELET PLAZA, SUITE 1530 CLAYTON MO 63105 1 0 0 0 Common Stock $1 par value 31309 D Phantom Stock Units 0.00 2018-03-09 4 A 0 69.943 0.00 A Common Stock 69.943 15228.371 D Dividend equivalents credited to the reporting person's account under the Amended and Restated 1997 Stock Plan for Non-employee Directors at $33.051 per share as of 3/9/2018 in exempt transactions. Security converts to common stock on a one-for-one basis. /s/ T. E. Murphy, Attorney-in-Fact 2018-03-13