Sec Form 4 Filing - Leunig Jack C. @ COMPASS MINERALS INTERNATIONAL INC - 2015-03-12

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person Leunig Jack C. 2. Issuer Name and Ticker or Trading Symbol COMPASS MINERALS INTERNATIONAL INC [ CMP] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) Senior Vice President (Last) (First) (Middle) C/O COMPASS MINERALS INTERNATIONAL, INC., 9900 WEST 109TH STREET, SUITE 100 3. Date of Earliest Transaction (MM/DD/YY) 03/12/2015 (Street) OVERLAND PARK, KS66210 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 03/12/2015 M 1,850 A $ 52.84 4,792 D Common Stock 03/12/2015 S 1,850 D $ 93.56 ( 1 ) 2,942 D Common Stock 03/12/2015 M 1,395 A $ 0 4,337 D Common Stock 03/13/2015 F 494 D $ 92.88 ( 2 ) 3,843 D Common Stock 03/12/2015 M 707 A $ 0 4,550 D Common Stock 03/13/2015 F 231 D $ 92.88 ( 3 ) 4,319 D Common Stock 756 ( 4 ) I Company 401(k) Plan

Tabl e II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares Restricted Stock Unit $ 0 03/12/2015 M 1,395 03/12/2015 03/12/2015 Common Stock 1,395 ( 5 ) 0 D Restricted Stock Unit $ 0 03/11/2016 03/11/2016 Common Stock 1,299 1,299 D Restricted Stock Unit $ 0 03/10/2017 03/10/2017 Common Stock 860 860 D Restricted Stock Unit $ 0 03/10/2018 03/10/2018 Common Stock 1,090 1,090 D Stock Option (Right to Buy) $ 52.84 03/12/2015 M 1,850 10/13/2009 10/13/2015 Common Stock 1,850 ( 6 ) 0 D Stock Option (Right to Buy) $ 58.99 03/10/2010 03/10/2016 Common Stock 2,910 2,910 D Stock Option (Right to Buy) $ 78.51 03/10/2011 03/10/2017 Common Stock 3,145 3,145 D Stock Option (Right to Buy) $ 86.47 03/10/2012 03/10/2018 Common Stock 2,410 2,410 D Stock Option (Right to Buy) $ 71.69 03/12/2013 03/12/2019 Common Stock 3,244 3,244 D Stock Option (Right to Buy) $ 76.99 03/11/2014 03/11/2020 Common Stock 3,614 3,614 D Stock Option (Right to Buy) $ 87.18 03/10/2015 03/10/2021 Common Stock 4,621 4,621 D Stock Option (Right to Buy) $ 91.75 03/10/2016 03/10/2022 Common Stock 6,627 6,627 D Performance Stock Unit $ 0 03/12/2015 M 707 ( 7 ) 03/12/2015 03/12/2015 Common Stock 707 ( 7 ) ( 8 ) 0 D Performance Stock Unit $ 0 03/11/2016 03/11/2016 Common Stock 965 965 D Performance Stock Unit $ 0 03/10/2017 03/10/2017 Common Stock 1,418 1,418 D Performance Stock Unit(rTSR) $ 0 03/10/2018 03/10/2018 Common Stock 900 900 D Performance Stock Unit(ROIC) $ 0 03/10/2018 03/10/2018 Common Stock 1,090 1,090 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Leunig Jack C. C/O COMPASS MINERALS INTERNATIONAL, INC. 9900 WEST 109TH STREET, SUITE 100 OVERLAND PARK, KS66210 Senior Vice President Signatures /s/ Robert E. Marsh as Attorney-in-Fact 03/13/2015 Signature of Reporting Person Date

Explanation of Responses:

( 1 )The 1,850 shares were traded in blocks ranging in price from $93.53 to $93.56. $93.56 is the weighted average price. Information regarding the number of shares sold at each separate price is available upon request by the SEC staff, the issuer, or any security holder of the issuer. ( 2 )The 494 shares were traded in blocks ranging in price from $92.72 to $93.17. $92.88 is the weighted average price. Information regarding the number of shares sold at each separate price is available upon request by the SEC staff, the issuer, or any security holder of the issuer. ( 3 )The 231 shares were traded in blocks ranging in price from $92.72 to $93.17. $92.88 is the weighted average price. Information regarding the number of shares sold at each separate price is available upon request by the SEC staff, the issuer, or any security holder of the issuer. ( 4 )The information in this report is based on a 401(k) plan statement dated as of 03-09-15. ( 5 )All Restricted Stock Units have a conversion price of $0.00. ( 6 )This transaction is the exercise of a derivative security. See column 2 for the exercise price. ( 7 )The cumulative performance of the three one-year performance periods applicable to this PSU grant resulted in a decrease of 300 shares from the original target grant. ( 8 )All Performance Stock Units have a conversion price of $0.00.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

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