Mosaic director exercises RSUs, gets new share award

Mosaic Co director Gretchen H. Watkins reported routine equity compensation changes.

Rhea-AI Filing Summary

Mosaic Co director Gretchen H. Watkins reported routine equity compensation changes. She exercised 4,873 restricted stock units into an equal number of Common Stock shares, increasing her direct Common Stock holdings to 35,934 shares. The exercised restricted stock units had vested on the date of Mosaic’s 2026 Annual Meeting of Stockholders.

Watkins also received a new award of 7,273 restricted stock units, each convertible one-for-one into Common Stock. According to the terms, these units will vest and be paid on the date of Mosaic’s 2027 Annual Meeting of Stockholders, if applicable conditions are met. The filing shows no open-market purchases or sales.

Insider Trade Summary

4,873 shares exercised/converted

Exercise 3 txns

Insider Watkins Gretchen H

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Restricted Stock Units	7,273	$0.00	$0.00
Exercise	Restricted Stock Units	4,873	$0.00	$0.00
Exercise	Common Stock	4,873	$0.00	$0.00

Holdings After Transaction: Restricted Stock Units — 7,273 contracts (Direct); Common Stock — 35,934 shares (Direct)

Footnotes (4)

1. F1. One-for-One
2. F2. 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.
3. F3. Not Applicable
4. F4. The restricted stock units vested on the date of the issuer's 2026 Annual Meeting of Stockholders.

Key Figures

RSUs exercised: 4,873 units Common shares held after transactions: 35,934 shares New RSU grant: 7,273 units +2 more

5 metrics

RSUs exercised 4,873 units Converted into 4,873 shares of Common Stock on 2026-05-28

Common shares held after transactions 35,934 shares Direct ownership following Form 4 transactions

New RSU grant 7,273 units Restricted stock units awarded on 2026-05-28

RSU vesting date (new grant) 2027 Annual Meeting New 7,273 RSUs vest and pay on 2027 meeting date

RSU vesting date (exercised grant) 2026 Annual Meeting 4,873 RSUs vested on 2026 Annual Meeting date

Key Terms

Restricted Stock Units, Exercise or conversion of derivative security, Grant, award, or other acquisition, Annual Meeting of Stockholders, +1 more

5 terms

Restricted Stock Units financial

"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."

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

Exercise or conversion of derivative security financial

"transaction_code_description": "Exercise or conversion of derivative security""

Grant, award, or other acquisition financial

"transaction_code_description": "Grant, award, or other acquisition""

Annual Meeting of Stockholders financial

"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."

One-for-One financial

"One-for-One"

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 06/01/2026 - 07:24 PM EDT Learn about SEC filing dates

SEC Form 4

FORM 4

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
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Watkins Gretchen H

(Last) (First) (Middle)

C/O THE MOSAIC COMPANY

101 EAST KENNEDY BOULEVARD, SUITE 2500

(Street)

TAMPA FLORIDA 33602

(City) (State) (Zip)

UNITED STATES

(Country)

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)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/28/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

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	05/28/2026		M		4,873	A	$0	35,934	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 (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 Securities Underlying Derivative Security (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: 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)	05/28/2026		A		7,273		(2)	(3)	Common Stock	7,273	$0	7,273	D
Restricted Stock Units	$0(1)	05/28/2026		M			4,873	(4)	(3)	Common Stock	4,873	$0	0	D

Explanation of Responses:

1. One-for-One

2. 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.

3. Not Applicable

4. The restricted stock units vested on the date of the issuer's 2026 Annual Meeting of Stockholders.

Remarks:

	/s/ Philip E. Bauer, Attorney-in-Fact for Gretchen H. Watkins	06/01/2026
	** Signature of Reporting Person	Date
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).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)