Mosaic Co (MOS) officer discloses RSU vesting and stock sale in Form 4

Rhea-AI Filing Summary

The Mosaic Company executive reports routine equity compensation activity. The company’s Senior Vice President, General Counsel and Corporate Secretary reported the vesting of 5,865 restricted stock units on 01/02/2026, converting into the same number of Mosaic common shares at a stated price of $0. After this vesting, the executive directly held 30,117 common shares.

On 01/05/2026, 1,739 shares of Mosaic common stock were disposed of at $25.02 per share, with a footnote stating the shares were sold to cover tax liability from the RSU vesting. Following these transactions, the executive directly owned 28,378 Mosaic common shares. The filing also lists remaining restricted stock units that may settle into 7,613, 14,085 and 20,797 common shares on future dates if vesting conditions are met.

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

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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^*

Bauer Philip Eugene

(Last) (First) (Middle)

C/O THE MOSAIC COMPANY

101 EAST KENNEDY BLVD, SUITE 2500

(Street)

TAMPA FL 33602

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
MOSAIC CO [ MOS ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Sr. VP, Gen Counsel & Corp Sec

3. Date of Earliest Transaction (Month/Day/Year)
01/02/2026

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

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

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

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	01/02/2026		M		5,865	A	$0	30,117	D
Common Stock	01/05/2026		F(1)		1,739	D	$25.02	28,378	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(2)	01/02/2026		M			5,865	01/03/2026	(3)	Common Stock	5,865	$0	0	D
Restricted Stock Units	$0(2)							03/23/2027	(3)	Common Stock	14,085		14,085	D
Restricted Stock Units	$0(2)							03/04/2028	(3)	Common Stock	20,797		20,797	D
Restricted Stock Units	$0(2)							03/09/2026	(3)	Common Stock	7,613		7,613	D

Explanation of Responses:

1. Shares sold to cover tax liability incurred as a result of most recent vesting of restricted stock units.

2. One-for-One

3. Not Applicable

Remarks:

	/s/ Philip E. Bauer	01/06/2026
	** 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.

FAQ

What insider transaction did Mosaic Co (MOS) report for January 2026?

A Mosaic Co senior executive reported the vesting of 5,865 restricted stock units into common stock on 01/02/2026 and a related sale of 1,739 shares on 01/05/2026.

Who filed this Form 4 for Mosaic Co (MOS) and what is their role?

The Form 4 was filed by a Mosaic Co officer serving as Senior Vice President, General Counsel & Corporate Secretary, reporting their personal equity holdings and transactions.

How many Mosaic Co (MOS) shares does the reporting person own after the transactions?

After the January 2026 transactions, the reporting person directly owns 28,378 shares of Mosaic Co common stock.

At what price were Mosaic Co (MOS) shares sold to cover taxes?

According to the Form 4 footnote, 1,739 shares of Mosaic Co common stock were disposed of at $25.02 per share to cover tax liability from the RSU vesting.

What restricted stock units remain outstanding for the Mosaic Co (MOS) executive?

The filing shows remaining restricted stock units that may convert into 7,613, 14,085 and 20,797 Mosaic common shares on future dates if vesting conditions are satisfied.

Does the Mosaic Co (MOS) Form 4 indicate direct or indirect ownership?

All reported Mosaic Co holdings in this Form 4 are listed as direct ownership (D) by the reporting person.