Sec Form 4 Filing - Corrigan Fredric W @ MOSAIC CO - 2007-10-04

Insider filing report for Changes in Beneficial Ownership
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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
Corrigan Fredric W
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)
3033 CAMPUS DRIVE, SUITE E490
3. Date of Earliest Transaction (MM/DD/YY)
10/04/2007
(Street)
PLYMOUTH, MN55441
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 250 I By Spouse
Common Stock 10/04/2007 M 3,140 A $ 0 125,220 D
Common Stock 10/04/2007 M 1,624 A $ 0 126,844 D
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
Stock Option (Right to Buy) $ 15.04 01/01/2007 12/31/2009 Common Stock 280,700 280,700 D
Stock Option (Right to Buy) $ 17.29 01/01/2007 12/31/2009 Common Stock 278,293 278,293 D
Restricted Stock Units $ 0 ( 1 ) 08/04/2009 ( 2 ) Common Stock 92,008 92,008 D
Stock Option (Right to Buy) $ 15.45 08/04/2007( 3 ) 12/31/2011 Common Stock 276,025 276,025 D
Restricted Stock Units $ 0 ( 1 ) 10/06/2009 ( 2 ) Common Stock 19,646 19,646 D
Restricted Stock Units $ 0 ( 1 ) 10/04/2007 M 3,140 02/01/2010( 4 ) ( 2 ) Common Stock 3,140 $ 0 0 D
Restricted Stock Units $ 0 ( 1 ) 10/04/2007 M 1,624 08/02/2010( 4 ) ( 2 ) Common Stock 1,624 $ 0 0 D
Reporting Owners
Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
Corrigan Fredric W
3033 CAMPUS DRIVE
SUITE E490
PLYMOUTH, MN55441
X
Signatures
s/ Richard L. Mack, Attorney in fact for Fredric W. Corrigan 10/09/2007
Signature of Reporting Person Date
Explanation of Responses:
( 1 )One for one
( 2 )Not applicable
( 3 )Vests as to annual cumulative installments of 33.33% one year from date of grant, beginning this date.
( 4 )Vesting accelerated upon retirement from the Company's Board of Directors on 10/4/07.

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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