Mosaic

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-05-28 10b5-1 Pre-arranged Plan: No --- Issuer --- Name: MOSAIC CO (MOS) CIK: 0001285785 --- Reporting Owner --- Name: Seaton David Thomas CIK: 0001392152 Role: Director --- Non-Derivative Transactions --- [Transaction #1] Security: Common Stock Date: 2026-05-28 | Code: M (Exercise of derivative) Shares: +3,167 | Price: $0.00 Shares Owned After: 51,089 | Ownership: D (Direct) Footnotes: [F1] The reporting person, pursuant to the terms of the Restricted Stock Unit Agreement under which the award of restricted stock units was made, elected to receive 35% of the restricted stock units in the form of cash with the balance paid in the form of shares of common stock at the time the award was paid. --- Derivative Transactions --- [Transaction #1] Security: Restricted Stock Units Date: 2026-05-28 | Code: A (Grant or award) Shares: +7,273 | Price: $0.00 Shares Owned After: 7,273 | Ownership: D (Direct) Footnotes: [F2] One-for-One [F3] The restricted stock units will vest and be paid to the reporting person on the date of the issuer's 2027 Annual Meeting of Stockholders. [F4] Not Applicable [Transaction #2] Security: Restricted Stock Units Date: 2026-05-28 | Code: M (Exercise of derivative) Shares: -4,873 | Price: $0.00 Shares Owned After: 0 | Ownership: D (Direct) Footnotes: [F2] One-for-One [F1] The reporting person, pursuant to the terms of the Restricted Stock Unit Agreement under which the award of restricted stock units was made, elected to receive 35% of the restricted stock units in the form of cash with the balance paid in the form of shares of common stock at the time the award was paid. [F5] The restricted stock units vested on the date of the issuer's 2026 Annual Meeting of Stockholders. [F4] Not Applicable --- Footnotes (Complete Index) --- F1: The reporting person, pursuant to the terms of the Restricted Stock Unit Agreement under which the award of restricted stock units was made, elected to receive 35% of the restricted stock units in the form of cash with the balance paid in the form of shares of common stock at the time the award was paid. F2: One-for-One F3: The restricted stock units will vest and be paid to the reporting person on the date of the issuer's 2027 Annual Meeting of Stockholders. F4: Not Applicable F5: The restricted stock units vested on the date of the issuer's 2026 Annual Meeting of Stockholders. --- Signature --- /s/ /s/Philip E. Bauer, Attorney-in-Fact for David T. Seaton (2026-06-01)