Mosaic (MOS) EVP Swager gains stock from awards, withholds shares for tax

Rhea-AI Filing Summary

Mosaic Co EVP of Operations Karen A. Swager reported equity compensation activity involving company stock. On March 9, 2026, she received 12,181 shares of Common Stock upon the vesting of a performance unit award originally granted on March 9, 2023, and additional vested shares are also reflected in the filing.

To cover tax liabilities from the vesting of restricted stock and performance units, 6,087 shares of Common Stock were disposed of at $26.92 per share through share withholding, rather than an open-market sale. After these transactions, she directly held 175,598 shares of Mosaic Common Stock, along with multiple unvested restricted stock unit awards scheduled to vest through March 4, 2029.

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

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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^*

Swager Karen A

(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)
	EVP - Operations

3. Date of Earliest Transaction (Month/Day/Year)
03/09/2026

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	03/09/2026		M		12,181	A	$0	176,547	D
Common Stock	03/09/2026		M(1)		5,138	A	$0	181,685	D
Common Stock	03/09/2026		F(2)		6,087	D	$26.92	175,598	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(3)							11/01/2026	(4)	Common Stock	15,485		15,485	D
Restricted Stock Units	$0							(5)	(4)	Common Stock	26,528		26,528	D
Restricted Stock Units	$0(3)							03/05/2027	(4)	Common Stock	21,767		21,767	D
Restricted Stock Units	$0(3)							03/04/2028	(4)	Common Stock	29,463		29,463	D
Restricted Stock Units	$0(3)	03/09/2026		M			12,181	03/09/2026	(4)	Common Stock	12,181	$0	0	D

Explanation of Responses:

1. Shares Issued to reporting person upon the vesting of a performance unit award granted to reporting person on March 9, 2023. The performance unit award was not a derivative security.

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

3. One-for-One

4. Not Applicable

5. The Restricted Stock Unit will vest a cumulative vesting percentage equal to 33% on March 4, 2027, 66% on March 4, 2028 and 100% on March 4, 2029.

Remarks:

	/s/ Philip E. Bauer, Attorney-in-Fact for Karen A. Swager	03/11/2026
	** 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.
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FAQ

What did Mosaic (MOS) EVP Karen Swager report in this Form 4?

Karen A. Swager reported equity compensation activity, including shares issued upon vesting of performance units and restricted stock. The filing also shows shares withheld to pay taxes, and her updated direct ownership of 175,598 Mosaic common shares after these transactions.

How many Mosaic (MOS) shares were issued to Karen Swager from awards?

The filing shows 12,181 Mosaic common shares issued upon vesting of a performance unit award granted on March 9, 2023. Additional vested shares are reflected in related entries, all tied to equity compensation rather than open-market stock purchases.

Why were 6,087 Mosaic (MOS) shares disposed of in this Form 4?

The Form 4 states that 6,087 shares of Mosaic common stock were disposed of at $26.92 per share to cover tax liabilities from the most recent vesting of restricted stock and performance units, using share withholding instead of an open-market sale.

How many Mosaic (MOS) shares does Karen Swager own after these transactions?

After the reported equity compensation and tax-withholding transactions, Karen A. Swager directly holds 175,598 shares of Mosaic common stock. This figure reflects her updated ownership following both the vesting of awards and the shares withheld for taxes.

What unvested Mosaic (MOS) restricted stock units does Karen Swager still hold?

The filing lists several restricted stock unit awards tied to Mosaic common stock, including blocks of 15,485, 26,528, 21,767, and 29,463 underlying shares. One award is scheduled to vest 33%, 66%, and 100% on March 4, 2027, 2028, and 2029, respectively.

Were Karen Swager’s Mosaic (MOS) transactions open-market buys or sells?

No, the reported Mosaic stock movements are equity compensation-related, not open-market trades. Shares were issued upon vesting of performance and restricted stock unit awards, and a portion was withheld to satisfy tax obligations rather than being sold on the open market.