Sec Form 4 Filing - O'Rourke James Calvin @ MOSAIC CO - 2022-04-27

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 O'Rourke James Calvin 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 X __ Officer (give title below) _____ Other (specify below) President & CEO (Last) (First) (Middle) C/O THE MOSAIC COMPANY, 101 EAST KENNEDY BLVD., SUITE 2500 3. Date of Earliest Transaction (MM/DD/YY) 04/27/2022 (Street) TAMPA, FL33602 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 04/27/2022 G( 1 ) V 13,295 D $ 0 0 I By 2019 GRAT dated April 1, 2019 Common Stock 04/27/2022 G( 1 ) V 13,295 A $ 0 148,515 D Common Stock 05/25/2022 G( 2 ) V 143,742 D $ 0 0 I By 2020 GRAT dated May 21, 2020 Common Stock 05/25/2022 G( 2 ) V 25,672 A $ 0 174,187 D Common Stock 05/25/2022 G( 3 ) V 174,187 D $ 0 0 D Common Stock 05/25/2022 G( 3 ) V 174,187 A $ 0 174,187 I 2022 GRAT 2A dated April 22, 2022 Common Stock 130,294 I By 2021 GRAT 2 dated June 30, 2021 Common Stock 23,128 I By 2021 GRAT 3 dated June 30, 2021 Common Stock 3,000 I Reporting Person's Spouse

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) $ 54.03 ( 4 ) 07/18/2023 Common Stock 29,987 29,987 D Stock Option (Right to Buy) $ 49.73 ( 4 ) 03/07/2024 Common Stock 33,706 33,706 D Stock Option (Right to Buy) $ 50.43 ( 4 ) 03/05/2025 Common Stock 37,306 37,306 D Stock Option (Right to Buy) $ 28.49 ( 4 ) 03/03/2026 Common Stock 179,211 179,211 D Stock Option (Right to Buy) $ 30.42 ( 4 ) 03/02/2027 Common Stock 168,180 168,180 D Restricted Stock Units $ 0( 5 ) 03/05/2023 ( 6 ) Common Stock 121,989 121,989 D Restricted Stock Units $ 0( 5 ) 03/04/2024 ( 6 ) Common Stock 83,418 83,418 D Restricted Stock Units $ 0( 5 ) 03/03/2025 ( 6 ) Common Stock 56,773 56,773 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other O'Rourke James Calvin C/O THE MOSAIC COMPANY 101 EAST KENNEDY BLVD., SUITE 2500 TAMPA, FL33602 X President & CEO Signatures /s/ Mark J. Isaacson, Attorney-in-Fact for James C. O'Rourke 05/27/2022 Signature of Reporting Person Date

Explanation of Responses:

( 1 )On April 27, 2022, the reporting person indirectly held 13,295 shares of MOS common stock ("2019 GRAT Shares") in a grantor retained annuity trust for the benefit of himself and his spouse ("2019 GRAT"). On that date and upon termination of the 2019 GRAT, the 2019 GRAT Shares were distributed to the reporting person in satisfaction of an annuity due to the reporting person and was exempt from reporting under Rule 16a-13. ( 2 )On May 25, 2022, the reporting person indirectly held 143,742 shares of MOS common stock ("2020 GRAT Shares") in a grantor retained annuity trust for the benefit of himself and his spouse ("2020 GRAT"). On that date and upon termination of the 2020 GRAT, 118,070 of the 2020 GRAT Shares were distributed to the James C. O'Rourke Grantor Investment Trust of 2019 for the benefit of the reporting person's adult children, which distribution was exempt from reporting under rule 16b-5; and 25,672 of the 2020 GRAT Shares shares were distributed to the reporting person in satisfaction of an annuity due to the reporting person and was exempt from reporting under Rule 16a-13. ( 3 )This transaction involved a gift of MOS common stock by the reporting person to a grantor retained annuity trust dated April 22, 2022, for the benefit of reporting person and his spouse ("2022 GRAT 2A"). The reporting person serves as trustee of the 2022 GRAT 2A. ( 4 )This Stock Option is 100% exercisable. ( 5 )One-for-One ( 6 )Not Applicable

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