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 OF SECURITIES 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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(Print or Type Responses)

1. Name and Address of Reporting Person * SEIBERT STEVEN M   2. Issuer Name and Ticker or Trading Symbol MOSAIC CO [MOS] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) __X__ Director _____ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) C/O THE MOSAIC COMPANY, 3033 CAMPUS DRIVE, SUITE E490 3. Date of Earliest Transaction (Month/Day/Year) 03/12/2014 (Street) PLYMOUTH, MN 55441 4. If Amendment, Date Original Filed(Month/Day/Year) 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 (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 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 03/12/2014   S(6)   483 D $ 48.5 11,468 D

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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 (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

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 (Month/Day/Year)

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 Units

$ 0 (1)

(3)

(2)

Common Stock

2,908

2,908

D

Restricted Stock Units

$ 0 (1)

(4)

(2)

Common Stock

2,813

2,813

D

Restricted Stock Units

$ 0 (1)

(5)

(2)

Common Stock

1,997

1,997

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
SEIBERT STEVEN M C/O THE MOSAIC COMPANY 3033 CAMPUS DRIVE, SUITE E490 PLYMOUTH, MN 55441	X

Signatures

s/Richard L. Mack, Attorney-in-Fact for Steven M. Seibert		03/13/2014
**Signature of Reporting Person		Date

Explanation of Responses:

*	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).
(1)	One for one
(2)	Not applicable
(3)	The restricted stock units vested on October 6, 2012. Vested shares will be delivered to the reporting person on October 6, 2014.
(4)	The restricted stock units vest on October 4, 2013. Vested shares will be delivered to the reporting person on October 4, 2015.
(5)	As a result of the change in fiscal year for the issuer, the restricted stock units awarded represent 7/12 of the Annual Equity Compensation Award most recently approved under the issuer's Non-Employee Director Compensation Program and will vest on the date of the issuer's 2014 Annual Meeting of Stockholders. Vested shares will be delivered to the reporting person on October 3, 2016.
(6)	Shares sold to cover tax liability incurred as a result of most recent vesting of Restricted Stock Units.

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