Sec Form 4 Filing - Standen James D. @ COMPASS MINERALS INTERNATIONAL INC - 2018-04-02

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 Standen James D. 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) Chief Financial Officer (Last) (First) (Middle) C/O COMPASS MINERALS INTERNATIONAL, INC., 9900 WEST 109TH STREET, SUITE 100 3. Date of Earliest Transaction (MM/DD/YY) 04/02/2018 (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 1,340 D Common Stock 1,253 I ( 1 ) Company 401(k) Plan

Table 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 Performance Stock Unit(ROIC) ( 2 ) 04/02/2018 A 2,769 04/02/2021 04/02/2021 Common Stock 2,769 $ 0 2,769 D Performance Stock Unit(rTSR) ( 3 ) 04/02/2018 A 2,449 04/02/2021 04/02/2021 Common Stock 2,449 $ 0 2,449 D Restricted Stock Unit ( 4 ) 04/02/2018 A 2,769 04/02/2021 04/02/2021 Common Stock 2,769 $ 0 2,769 D Stock Option (Right to Buy) $ 59.5 04/02/2018 A 19,451 ( 5 ) 04/02/2025 Common Stock 19,451 $ 0 19,451 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Standen James D. C/O COMPASS MINERALS INTERNATIONAL, INC. 9900 WEST 109TH STREET, SUITE 100 OVERLAND PARK, KS66210 Chief Financial Officer Signatures /s/ Robert B. Porter as Attorney-in-Fact 04/04/2018 Signature of Reporting Person Date

Explanation of Responses:

( 1 )The reported number is based on a 401(k) plan statement dated as of April 2, 2018. ( 2 )Each performance stock unit represents a contingent right to receive between 0% and 200% of one share of Issuer common stock. The reported number of securities represents the target number of shares that may be earned. The actual number of shares that may be earned will be calculated based on the Issuer's return on invested capital over a three-year performance period. ( 3 )Each performance stock unit represents a contingent right to receive between 0% and 150% of one share of Issuer common stock. The reported number of securities represents the target number of shares that may be earned. The actual number of shares that may be earned will be calculated by comparing the Issuer's relative total shareholder return to the total shareholder return for each company comprising the Issuer's peer group over a three-year performance period. ( 4 )Each restricted stock unit represents a contingent right to receive one share of Issuer common stock. Vesting of the restricted stock units is contingent on satisfaction of a performance hurdle tied to the Issuer's 2018 financial performance. ( 5 )This stock option award vests in four equal annual installments of 25% each, beginning on the first anniversary of the grant date.

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).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

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