X0306 4 2013-03-14 0 0001227654 COMPASS MINERALS INTERNATIONAL INC CMP 0001240443 ROTHWELL ALLAN R C/O COMPASS MINERALS INTERNATIONAL, INC. 9900 WEST 109TH STREET, SUITE 100 OVERLAND PARK KS 66210 1 0 0 0 Common Stock 2013-03-14 4 A 0 22 76.15 A 9854 I Directors Deferred Compensation Plan Common Stock 2013-03-14 4 A 0 48 76.27 A 9902 I Directors Deferred Compensation Plan Common Stock 1144 D Dividend equivalents on deferred stock units awarded before April 1, 2008 are determined under the 2004 Directors' Deferred Compensation Plan, as restated and amended, based on the average of the high and low trading price for Company stock for the first trading date immediately preceding the dividend date. Dividend equivalents on deferred stock units awarded on and after April 1, 2008 are determined under Independent Director Deferred Stock Award Agreements, based on the closing price of Company stock for the first trading date immediately preceding the dividend date. /s/ Robert E. Marsh, Attorney-in-Fact 2013-03-18