Mosaic director exercises 4,873 RSUs, gets new grant

Director Kathleen M. Shanahan of Mosaic Co reported routine equity compensation activity involving restricted stock units.

Rhea-AI Filing Summary

Director Kathleen M. Shanahan of Mosaic Co reported routine equity compensation activity involving restricted stock units. On May 28, 2026, she exercised 4,873 restricted stock units on a one-for-one basis into 4,873 shares of Common Stock, reflecting RSUs that vested on the date of Mosaic’s 2026 Annual Meeting of Stockholders. Following this exercise, her direct Common Stock holdings increased to 7,286 shares. On the same date, she received a new award of 7,273 restricted stock units, which will vest and be paid in shares on the date of Mosaic’s 2027 Annual Meeting of Stockholders, aligning her compensation with future company performance. No open-market purchases or sales were reported.

Insider Trade Summary

4,873 shares exercised/converted

Exercise 3 txns

Insider Shanahan Kathleen M

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 — 7,286 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 exercise: 7,286 shares New RSU award: 7,273 units +2 more

5 metrics

RSUs exercised 4,873 units Converted one-for-one into common stock on May 28, 2026

Common shares held after exercise 7,286 shares Director’s direct Mosaic Common Stock holdings post-transaction

New RSU award 7,273 units Restricted stock units granted on May 28, 2026

RSU-to-share ratio 1:1 One-for-one conversion of restricted stock units into Common Stock

Exercise transactions 1 event, 4,873 shares Exercise or conversion of derivative security reported in Form 4

Key Terms

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

4 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 vested on the date of the issuer's 2026 Annual Meeting of Stockholders."

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transactions did Mosaic (MOS) director Kathleen Shanahan report?

Kathleen Shanahan reported exercising 4,873 restricted stock units into 4,873 Mosaic common shares and receiving a new grant of 7,273 restricted stock units. These actions are compensation-related and did not involve any open-market buying or selling of Mosaic stock.

How many Mosaic (MOS) shares does Kathleen Shanahan hold after these transactions?

After exercising vested restricted stock units, Kathleen Shanahan directly holds 7,286 shares of Mosaic common stock. This reflects the addition of 4,873 shares from the RSU conversion reported in the filing, with no corresponding sale transactions disclosed.

What new equity award did Mosaic (MOS) grant to director Kathleen Shanahan?

Mosaic granted 7,273 restricted stock units to director Kathleen Shanahan. According to the filing, these units will vest and be paid in shares on the date of Mosaic’s 2027 Annual Meeting of Stockholders, providing stock-based compensation tied to future service.

Were there any open-market stock sales or purchases by Mosaic (MOS) director Kathleen Shanahan?

The filing shows no open-market purchases or sales by Kathleen Shanahan. Reported activity consists of exercising previously granted restricted stock units into common shares and receiving a new restricted stock unit award as part of director compensation.

How do the restricted stock units reported by Mosaic (MOS) convert into shares?

The filing notes a one-for-one relationship between restricted stock units and Mosaic common shares. When units vest, each restricted stock unit converts into one share of common stock, as seen in the 4,873 units exercised into 4,873 shares.

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

Form 4 Insider Transactions: What Each Field Means →

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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^*

Shanahan Kathleen M

(Last) (First) (Middle)

C/O THE MOSAIC COMPANY

101 EAST KENNEDY BLVD., 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	7,286	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 Kathleen M. Shanahan	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)