Ownership Submission
FORM 3
 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF 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 *
  Kaplan Mark Eric
 2. Date of Event Requiring Statement (Month/Day/Year)
08/01/2011		 3. Issuer Name and Ticker or Trading Symbol
MOSAIC CO [MOS]
(Last)
(First)
(Middle)
ATRIA CORPORATE CENTER, SUITE E490, 3033 CAMPUS DRIVE		 4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
VP - Public Affairs
 5. If Amendment, Date Original Filed(Month/Day/Year)
(Street)

PLYMOUTH, MN 55441		 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 Beneficially Owned
1.Title of Security
(Instr. 4)		 2. Amount of Securities Beneficially Owned
(Instr. 4)		 3. Ownership Form: Direct (D) or Indirect (I)
(Instr. 5)		 4. Nature of Indirect Beneficial Ownership
(Instr. 5)
Common Stock 1,213
D
 

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. SEC 1473 (7-02)
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 4)		 2. Date Exercisable and Expiration Date
(Month/Day/Year)		 3. Title and Amount of Securities Underlying Derivative Security
(Instr. 4)		 4. Conversion or Exercise Price of Derivative Security 5. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 5)		 6. Nature of Indirect Beneficial Ownership
(Instr. 5)
Date Exercisable Expiration Date Title Amount or Number of Shares
Stock Option (Right to Buy)   (1) 07/31/2018 Common Stock 1,646 $ 127.21 D  
Stock Option (Right to Buy)   (2) 07/27/2019 Common Stock 3,125 $ 52.72 D  
Restricted Stock Units 07/27/2012   (3) Common Stock 1,062 $ 0 (4) D  
Stock Option (Right to Buy)   (5) 07/27/2020 Common Stock 3,545 $ 44.93 D  
Restricted Stock Units 07/27/2013   (3) Common Stock 1,947 $ 0 (4) D  
Stock Option (Right to Buy)   (6) 07/21/2021 Common Stock 3,768 $ 70.62 D  
Restricted Stock Units 07/21/2014   (3) Common Stock 1,652 $ (4) D  

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
Kaplan Mark Eric
ATRIA CORPORATE CENTER, SUITE E490
3033 CAMPUS DRIVE
PLYMOUTH, MN 55441		       VP - Public Affairs  

Signatures

/s/ Richard L. Mack, Attorney-in-fact for Mark E. Kaplan 08/10/2011
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 5(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) This Stock Option is 100% exercisable.
(2) Grant Date 07/27/2009; option becomes exercisable in three equal installments commencing on the first anniversary of the grant date and on each anniversary thereafter.
(3) Not Applicable
(4) One-for-One
(5) Grant Date 07/27/2010; option becomes exercisable in three equal installments commencing on the first anniversary of the grant date and on each anniversary thereafter.
(6) Grant Date 07/21/2011; option becomes exercisable in three equal installments commencing on the first anniversary of the grant date and on each anniversary thereafter.

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