Mosaic SVP Lisa L. Poissant holds four stock grants

The reported 2,787- and 10,799-RSU positions have cumulative vesting schedules reaching 100% in 2029.

Available on EDGAR 11/05/2026 - 04:32 PM EST Accepted by SEC EDGAR 11/05/2026 - 04:29 PM EST Learn about SEC filing dates

Rhea-AI Filing Summary

MOSAIC CO reports that Lisa L. Poissant, SVP and CHRO, directly held four Restricted Stock Unit positions on November 1, 2026, representing 2,882, 3,901, 2,787 and 10,799 underlying common shares. The RSUs are listed on a one-for-one basis against Common Stock. The 2,787-RSU and 10,799-RSU positions have stated cumulative vesting schedules running through 2029.

Insider Trade Summary

Holdings reported, no transactions

Holdings

Insider Poissant Lisa L

Role SVP and CHRO

Type	Security	Shares	Price	Value
Holding	Restricted Stock Units F2, F1	--	--	--
Holding	Restricted Stock Units F2, F1	--	--	--
Holding	Restricted Stock Units F2, F3, F1	--	--	--
Holding	Restricted Stock Units F2, F4, F1	--	--	--

Holdings: Restricted Stock Units — 20,369 contracts (Direct)

Footnotes (4)

1. F1. Not Applicable
2. F2. One-for-One
3. F3. 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.
4. F4. The Restricted Stock Unit will vest a cumulative vesting percentage equal to 33% on May 1, 2027, 66% on May 1, 2028 and 100% on May 1, 2029.

Key Figures

Underlying common shares: 2,882 shares Underlying common shares: 3,901 shares Underlying common shares: 2,787 shares +1 more

4 metrics

Underlying common shares 2,882 shares Directly held RSUs reported November 1, 2026

Underlying common shares 3,901 shares Directly held RSUs reported November 1, 2026

Underlying common shares 2,787 shares Directly held RSUs reported November 1, 2026

Underlying common shares 10,799 shares Directly held RSUs reported November 1, 2026

Key Terms

Restricted Stock Unit, cumulative vesting percentage, One-for-One

3 terms

Restricted Stock Unit technical

"The Restricted Stock Unit will vest"

A restricted stock unit is a promise from a company to give an employee shares of stock after certain conditions are met, like staying with the company for a set amount of time. It’s like earning a bonus that turns into company stock once you’ve proven your commitment, making it a way to motivate and reward employees.

cumulative vesting percentage technical

"cumulative vesting percentage equal to 33%"

One-for-One technical

"One-for-One"

FAQ

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

What vesting schedules did Lisa L. Poissant report for MOS RSUs?

The 2,787-RSU position has cumulative vesting of 33% on March 4, 2027, 66% on March 4, 2028 and 100% on March 4, 2029. The 10,799-RSU position has cumulative vesting of 33% on May 1, 2027, 66% on May 1, 2028 and 100% on May 1, 2029.

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

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SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

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:			3235-0104
Estimated average burden
hours per response:			0.5

1. Name and Address of Reporting Person^*

Poissant Lisa L

(Last) (First) (Middle)

101 EAST KENNEDY BLVD.

SUITE 2500

(Street)

TAMPA FLORIDA 33602

(City) (State) (Zip)

UNITED STATES

(Country)

2. Date of Event Requiring Statement (Month/Day/Year)
11/01/2026

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

3a. Foreign Trading Symbol

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

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

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	SVP and CHRO

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 Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Restricted Stock Units	03/05/2027	(1)	Common Stock	2,882	$0(2)	D
Restricted Stock Units	03/04/2028	(1)	Common Stock	3,901	$0(2)	D
Restricted Stock Units	(3)	(1)	Common Stock	2,787	$0(2)	D
Restricted Stock Units	(4)	(1)	Common Stock	10,799	$0(2)	D

Explanation of Responses:

1. Not Applicable

2. One-for-One

3. 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.

4. The Restricted Stock Unit will vest a cumulative vesting percentage equal to 33% on May 1, 2027, 66% on May 1, 2028 and 100% on May 1, 2029.

Remarks:

	/s/ Philip E. Bauer, Attorney-in-Fact for Lisa L. Poissant	11/05/2026
	** 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 5 (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 3: SEC 1473 (03-26)