Are Emery N. Koenig’s Mosaic (MOS) transactions open-market buys or compensation-related?

The reported transactions are compensation-related, involving restricted stock units. One block of 4,873 units vested and converted into shares, and another block of 7,273 units was granted, with future vesting at the 2027 Annual Meeting of Stockholders.

Mosaic director exercises RSUs, gets new grant

Mosaic Co director Emery N. Koenig reported equity compensation activity involving restricted stock units.

Filing Impact

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Filing Sentiment

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Form Type

Rhea-AI Filing Summary

Mosaic Co director Emery N. Koenig reported equity compensation activity involving restricted stock units. He exercised 4,873 restricted stock units into 4,873 shares of common stock in connection with vesting on the date of Mosaic’s 2026 Annual Meeting of Stockholders, bringing his direct holdings to 86,228 shares of common stock.

Koenig also received a new grant of 7,273 restricted stock units, which will vest and be paid on the date of Mosaic’s 2027 Annual Meeting of Stockholders. Each restricted stock unit corresponds one-for-one to a share of common stock. No open-market purchases or sales were reported in this filing.

Insider Trade Summary

4,873 shares exercised/converted

Exercise 3 txns

Insider Koenig Emery N.

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 — 86,228 shares (Direct)

Footnotes (4)

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

Key Figures

RSUs exercised into common stock: 4,873 shares New RSU grant: 7,273 units Shares owned after transaction: 86,228 shares +2 more

5 metrics

RSUs exercised into common stock 4,873 shares Restricted stock units converted to Mosaic common stock on May 28, 2026

New RSU grant 7,273 units Restricted stock units granted on May 28, 2026, vesting at 2027 Annual Meeting

Shares owned after transaction 86,228 shares Direct Mosaic common stock holdings following Form 4 transactions

Exercise price per RSU $0.00 per unit Non-cash derivative exercise of 4,873 restricted stock units

One-for-one conversion ratio 1 unit = 1 share Each restricted stock unit corresponds to one Mosaic common share

Key Terms

Restricted Stock Units, derivative security, Annual Meeting of Stockholders, Grant, award, or other acquisition, +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.

derivative security financial

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

A derivative security is a financial contract whose value comes from the price or performance of something else, such as a stock, bond, commodity, or market index. For investors it acts like an insurance policy or a wager: it can be used to protect against losses, lock in prices, or amplify gains and losses, so it can change a portfolio’s risk and potential return without owning the underlying asset directly.

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."

Grant, award, or other acquisition financial

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

One-for-One financial

"One-for-One"

FAQ

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

What insider transactions did Mosaic (MOS) director Emery N. Koenig report?

Emery N. Koenig reported equity compensation activity, not market trades. He exercised 4,873 restricted stock units into the same number of Mosaic common shares and received a new grant of 7,273 restricted stock units linked one-for-one to common stock.

How many Mosaic (MOS) shares does Emery N. Koenig hold after these transactions?

After exercising restricted stock units, Emery N. Koenig directly holds 86,228 shares of Mosaic common stock. This figure reflects his position following the May 28, 2026 transactions disclosed, excluding the new 7,273 restricted stock units that will vest in the future.

Did Mosaic (MOS) director Emery N. Koenig sell any shares in this Form 4?

No, the Form 4 shows no open-market sales or purchases. The activity consists of exercising 4,873 restricted stock units into common shares and receiving a grant of 7,273 new restricted stock units as part of equity compensation arrangements.

What are the terms of Emery N. Koenig’s new 7,273 Mosaic (MOS) restricted stock units?

Koenig’s 7,273 restricted stock units convert one-for-one into Mosaic common stock. According to the disclosure, these units will vest and be paid on the date of Mosaic’s 2027 Annual Meeting of Stockholders, subject to the plan’s standard conditions.

When did the previously granted Mosaic (MOS) restricted stock units vest for Emery N. Koenig?

The previously granted restricted stock units vested on the date of Mosaic’s 2026 Annual Meeting of Stockholders. Upon vesting, Emery N. Koenig exercised 4,873 units, receiving 4,873 shares of Mosaic common stock in a non-cash derivative exercise transaction.

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

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^*

Koenig Emery N.

(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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	05/28/2026		M		4,873	A	$0	86,228	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)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
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 Emery N. Koenig	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)

Source: View Original Filing on SEC EDGAR