Mosaic (MOS) SVP gains shares from awards, uses 6,667 shares for taxes

Rhea-AI Filing Summary

Mosaic Co senior vice president Walter F. Precourt III reported equity compensation activity involving Mosaic common stock. On March 9, 2026, he acquired 12,181 shares of common stock at $0.00 per share upon vesting of equity awards, and an additional 5,138 shares at $26.92 per share. To cover related tax liabilities, 6,667 shares were withheld and delivered back at $26.92 per share, a non‑market disposition. After these transactions he directly held 139,198 common shares, along with restricted stock units tied one-for-one to Mosaic common stock, including 24,606, 20,487, and 27,730 underlying shares that will vest over future 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

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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^*

Precourt Walter F. III

(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)
	SVP - Chief Admin Officer

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	140,727	D
Common Stock	03/09/2026		M(1)		5,138	A	$26.92	145,865	D
Common Stock	03/09/2026		F(2)		6,667	D	$26.92	139,198	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)	03/09/2026		M			12,181	03/09/2026	(4)	Common Stock	12,181	$0	0	D
Restricted Stock Units	$0(3)							(5)	(4)	Common Stock	24,606		24,606	D
Restricted Stock Units	$0(3)							03/05/2027	(4)	Common Stock	20,487		20,487	D
Restricted Stock Units	$0(3)							03/04/2028	(4)	Common Stock	27,730		27,730	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 Walter F. Precourt III	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).
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FAQ

What equity transactions did Mosaic (MOS) executive Walter F. Precourt III report?

Walter F. Precourt III reported equity award activity, receiving common shares from vested awards and related exercises. The filing also shows shares withheld to satisfy tax liabilities, plus remaining restricted stock units that will convert into Mosaic common stock over future vesting dates.

How many Mosaic (MOS) shares did the executive acquire in this Form 4?

The executive acquired 12,181 Mosaic common shares at $0.00 per share and an additional 5,138 shares at $26.92 per share. These shares came from vesting and related award activity rather than open-market purchases, reflecting routine equity compensation.

Were any Mosaic (MOS) shares sold on the open market in this filing?

No open-market sale is reported. Instead, 6,667 Mosaic common shares were delivered to cover tax liabilities tied to the vesting of restricted stock and performance units. This tax-withholding disposition does not represent a discretionary market sale by the executive.

What are Walter Precourt’s Mosaic (MOS) holdings after these transactions?

After the reported transactions, Walter Precourt directly held 139,198 Mosaic common shares. He also held several restricted stock unit awards, each exchangeable one-for-one into Mosaic common stock, with underlying amounts of 24,606, 20,487, and 27,730 shares subject to future vesting.

How do the Mosaic (MOS) restricted stock units vest for this executive?

One restricted stock unit grant will vest cumulatively at 33% on March 4, 2027, 66% on March 4, 2028, and 100% on March 4, 2029. Each vested unit converts one-for-one into Mosaic common stock, increasing the executive’s share ownership over time.

What is the nature of the Mosaic (MOS) performance unit award mentioned?

The filing states shares were issued upon vesting of a performance unit award granted March 9, 2023, and notes this award was not a derivative security. The resulting shares appear as common stock acquired through equity compensation rather than as derivative option exercises.