Mosaic CFO granted 38,447 RSUs

Pires Luciano Siani reported acquisition or exercise transactions in this Form 4 filing.

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Form Type

Rhea-AI Filing Summary

Pires Luciano Siani reported acquisition or exercise transactions in this Form 4 filing.

Mosaic Co EVP and CFO Luciano Siani Pires reported an equity award of 38,447 Restricted Stock Units (RSUs). The RSUs were granted at no cash cost and are convertible into Mosaic common shares on a one-for-one basis.

The award vests cumulatively, with 33% vesting on March 4, 2027, 66% on March 4, 2028, and 100% on March 4, 2029. The filing also lists his existing direct and indirect holdings of RSUs and common stock as of the transaction date.

Insider Trade Summary

Grant/Award: 38,447 shares

Grant/Award 5 txns

Insider Pires Luciano Siani

Role EVP and CFO

Type	Security	Shares	Price	Value
Grant/Award	Restricted Stock Units	38,447	$0.00	$0.00
holding	Restricted Stock Units	--	--	--
holding	Restricted Stock Units	--	--	--
holding	Common Stock	--	--	--
holding	Common Stock	--	--	--

Holdings After Transaction: Restricted Stock Units — 97,273 contracts for 58,826 underlying shares (Direct); Common Stock — 10,000 shares (Indirect, Waterside International Ventures Limited); Common Stock — 6,040 shares (Direct)

Footnotes (3)

F1. One-for-One
F2. The award vests cumulatively as follows: 33% on March 4, 2027, 66% on March 4, 2028 and 100% on March 4, 2029.
F3. Not Applicable

FAQ

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

What insider transaction did Mosaic (MOS) report for EVP and CFO Luciano Siani Pires?

Mosaic’s EVP and CFO Luciano Siani Pires reported receiving 38,447 Restricted Stock Units as an equity award. These RSUs were granted at no cash cost and are structured to convert into Mosaic common stock, reflecting stock-based compensation rather than an open-market purchase or sale.

How many Restricted Stock Units did the Mosaic (MOS) CFO receive in this Form 4 filing?

The Mosaic CFO received an award of 38,447 Restricted Stock Units. This grant increases his stock-based compensation position and aligns his interests with shareholders, since each RSU is designed to convert into one share of Mosaic common stock if vesting and other applicable conditions are met.

What is the vesting schedule for the Mosaic (MOS) CFO’s 38,447 RSU award?

The 38,447 RSUs vest cumulatively over three years. According to the disclosure, 33% vest on March 4, 2027, 66% on March 4, 2028, and 100% on March 4, 2029, subject to any applicable continued service or plan requirements.

What does one-for-one conversion mean for the Mosaic (MOS) CFO’s RSUs?

One-for-one conversion means each Restricted Stock Unit can settle into one share of Mosaic common stock. When vesting and settlement conditions are met, the number of RSUs determines how many common shares the executive ultimately receives, directly linking the award’s value to Mosaic’s share price.

Does this Mosaic (MOS) Form 4 show any stock sales by the CFO?

The Form 4 highlights a grant of 38,447 Restricted Stock Units classified as an acquisition-type award. There are no reported open-market stock sales in this data; other line items describe existing direct and indirect holdings of RSUs and common stock rather than disposals.

How are indirect Mosaic (MOS) shares held for the reporting executive?

The filing notes an indirect holding of Mosaic common stock through Waterside International Ventures Limited. This indicates some shares are owned via that entity rather than directly, while additional Mosaic shares and RSUs are listed as held directly in the executive’s name in the same report.

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Form 4 Insider Transactions: What Each Field Means →

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Accepted by SEC EDGAR 03/06/2026 - 01:22 PM EST

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^*

Pires Luciano Siani

(Last)

(First)

(Middle)

C/O THE MOSAIC COMPANY

101 EAST KENNEDY BLVD., SUITE 2500

(Street)

TAMPA

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 and CFO

3. Date of Earliest Transaction (Month/Day/Year)
03/04/2026

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)
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								10,000	I	Waterside International Ventures Limited
Common Stock								6,040	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⁾	03/04/2026		A		38,447		⁽²⁾	⁽³⁾	Common Stock	38,447	$0	38,447	D
Restricted Stock Units	$0⁽¹⁾							11/18/2027	⁽³⁾	Common Stock	15,498		15,498	D
Restricted Stock Units	$0⁽¹⁾							03/04/2028	⁽³⁾	Common Stock	43,328		43,328	D

Explanation of Responses:

1. One-for-One

2. The award vests cumulatively as follows: 33% on March 4, 2027, 66% on March 4, 2028 and 100% on March 4, 2029.

3. Not Applicable

Remarks:

	/s/ Philip E. Bauer, Attorney-in-fact for Luciano Siani Pires	03/06/2026
	** 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.

Source: View Original Filing on SEC EDGAR