X0306 4 2015-03-10 0 0001227654 COMPASS MINERALS INTERNATIONAL INC CMP 0001626839 Foulston Matthew J. C/O COMPASS MINERALS INTERNATIONAL, INC. 9900 WEST 109TH STREET, SUITE 100 OVERLAND PARK KS 66210 0 1 0 0 Chief Financial Officer Common Stock 13 I Company 401(k) Plan Restricted Stock Unit 0 2016-03-02 2016-03-02 Common Stock 3543 3543 D Restricted Stock Unit 0 2015-03-10 4 A 0 1636 0 A 2018-03-10 2018-03-10 Common Stock 1636 1636 D Stock Option (Right to Buy) 91.75 2015-03-10 4 A 0 9940 0 A 2016-03-10 2022-03-10 Common Stock 9940 9940 D Performance Stock Unit(rTSR) 0 2015-03-10 4 A 0 1350 0 A 2018-03-10 2018-03-10 Common Stock 1350 1350 D Performance Stock Unit(ROIC) 0 2015-03-10 4 A 0 1636 0 A 2018-03-10 2018-03-10 Common Stock 1636 1636 D The information in this report is based on a 401(k) plan statement dated as of 03-09-15. Restricted Stock Units granted: 3 year cliff vest on 3-10-2018, provided performance threshold satisfied. Stock options granted: vesting 25% after year one and then 25% per year thereafter. On the third anniversary of the grant date, these PSUs cliff vest and shares of Company common stock are granted based on achievement of relative total shareholder return ("rTSR") performance goals over a three-year period beginning in 2015 and ending in 2017. Payout for vested PSUs range from 0% to 150% based on the Company's rTSR percentile compared to the rTSR of the companies comprising a market index. The number of shares in this grant are subject to adjustment, up or down, based upon attainment above or below the targeted percentile rank. On the third anniversary of the grant date, these PSUs cliff vest and shares of Company common stock are granted based on an average of three annual calculations of achievement of return on invested capital ("ROIC") performance goals over a three-year period beginning in 2015 and ending in 2017. Payout for vested PSUs range from 0% to 200% based on the Company's ROIC performance. The number of shares in this grant are subject to adjustment, up or down, based upon attainment above or below the targeted ROIC. /s/ Robert E. Marsh, Attorney in Fact 2015-03-12