Mosaic (NYSE: MOS) officer to sell $509K in stock in 2026 plan

Rhea-AI Filing Summary

MOSAIC CO (MOS) has a planned insider sale reported under Rule 144 by Walter F. Precourt III. The notice covers the proposed sale of 23,000 shares of common stock of Mosaic through Fidelity Brokerage Services LLC on or about August 19, 2026. These shares originated from restricted stock vesting on March 3, 2023 as compensation. The filing lists an aggregate market value of $508,595.63 for the shares covered by this notice.

Key Figures

Shares proposed to be sold: 23,000 shares Aggregate market value: $508,595.63 Proposed sale date: 08/19/2026 +2 more

5 metrics

Shares proposed to be sold 23,000 shares Common stock of Mosaic to be sold under Rule 144

Aggregate market value $508,595.63 Value of 23,000 Mosaic common shares covered by the notice

Proposed sale date 08/19/2026 Intended date to begin sales through Fidelity Brokerage Services LLC

Acquisition date of shares 03/03/2023 Date shares were acquired via restricted stock vesting as compensation

Shares acquired via vesting 23,000 shares Restricted stock vesting on March 3, 2023 classified as compensation

Key Terms

Rule 144, Restricted Stock Vesting, attorney-in-fact

3 terms

Rule 144 regulatory

"See the definition of "person" in paragraph (a) of Rule 144."

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

Restricted Stock Vesting financial

"Common | 03/03/2023 | Restricted Stock Vesting | Issuer"

Restricted stock vesting is the timetable and conditions under which shares granted to employees or insiders become fully owned and can be sold, typically requiring continued work or meeting performance goals. It matters to investors because large blocks of shares can become tradable at once, which can change share supply and price, and because vesting aligns insiders’ incentives with the company’s long‑term performance—think of it like a timed unlock that both rewards and locks in key people.

attorney-in-fact regulatory

"as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact"

An attorney-in-fact is the person or entity given legal authority through a power of attorney to act on behalf of another for specific tasks, such as signing documents, voting shares, or handling transactions. For investors, this matters because it lets a trusted representative make timely decisions or complete paperwork when the owner cannot, much like handing keys to someone to run errands on your behalf—so checks on scope and limits of that authority are important.

FAQ

What insider transaction did MOSAIC CO (MOS) report in this Form 144 filing?

The filing reports a planned sale of 23,000 shares of Mosaic common stock by Walter F. Precourt III under Rule 144, to be executed through Fidelity Brokerage Services LLC, providing advance notice of the potential disposition.

What is the approximate value of the MOS shares covered by this Form 144?

The notice states an aggregate market value of $508,595.63 for the 23,000 shares of Mosaic common stock proposed to be sold, giving investors a sense of the transaction’s dollar magnitude as of the time of the notice.

When were the MOS shares to be sold acquired by Walter F. Precourt III?

The 23,000 shares were acquired on March 3, 2023 through “Restricted Stock Vesting” as compensation from Mosaic. This indicates they originated as equity-based compensation that subsequently vested into common shares.

When is the planned sale date for the MOS shares in this Form 144?

The proposed sale date listed is August 19, 2026. Rule 144 notices outline an intended sale window, and this date reflects when the broker may begin executing sales, subject to Rule 144 conditions.

Which broker is handling the proposed MOS share sale under this Form 144?

The filing names Fidelity Brokerage Services LLC as the broker for the 23,000-share proposed sale of Mosaic common stock, including the broker’s Smithfield, Rhode Island office address as part of the transaction details.

What is the relationship of Walter F. Precourt III to MOSAIC CO (MOS)?

The notice identifies Walter F. Precourt III as an officer of Mosaic. The Form 144 is signed by a representative of Fidelity Brokerage Services LLC acting as attorney-in-fact for him in connection with this planned sale.

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

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Available on EDGAR 08/19/2026 - 03:34 PM Accepted by SEC EDGAR 08/19/2026 - 03:34 PM Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001609765
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	MOSAIC CO
SEC File Number	001-32327
Address of Issuer	101 EAST KENNEDY BLVD. SUITE 2500 TAMPA FLORIDA 33602
Phone	813-775-4200
Name of Person for Whose Account the Securities are To Be Sold	Precourt Walter F. III
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Officer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Fidelity Brokerage Services LLC 900 Salem Street Smithfield RI 02917	23000	508595.63	317895646	08/19/2026	NYSE

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	03/03/2023	Restricted Stock Vesting	Issuer			23000	03/03/2023	Compensation

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Nothing to Report

144: Remarks and Signature

Remarks
Date of Notice	08/19/2026
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/Wade Moss, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Walter F. Precourt III
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)