X0303 4 2011-06-14 0 0001227654 COMPASS MINERALS INTERNATIONAL INC CMP 0001287185 GRANT RICHARD S 8224 BALD EAGLE LANE WILMINGTON NC 28411 1 0 0 0 Common Stock 2011-06-14 4 A 0 28 86.95 A 7436 I Directors Deferred Compensation Plan Common Stock 2011-06-14 4 A 0 10 87.17 A 7446 I Directors Deferred Compensation Plan Common Stock 17334 D Stock Opton (Right to Buy) (Common Stock) 16.66 2004-04-08 2012-05-08 Common Stock 3000 3000 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 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 prior to the dividend date. /s/ Robert E. Marsh, Attorney-in-Fact 2011-06-16