Maze Therapeutics officer plans $110K stock sale

Officer Courtney Phillips files a Rule 144 notice to sell 4,144 MAZE common shares from recently vested RSUs, partly to cover tax withholding.

Rhea-AI Filing Summary

Maze Therapeutics, Inc. (MAZE) discloses that officer Courtney Phillips has filed a notice of proposed sale of 4,144 shares of Common Stock under Rule 144. The shares are to be sold through Morgan Stanley Smith Barney, with an indicated value of about $110,000 as of September 2, 2026 on Nasdaq.

The securities arise from restricted stock units that vested on September 1, 2026 as compensation from the issuer. The filing states the reported sale was mandated by the issuer and includes shares to satisfy tax withholding obligations related to that RSU vesting and settlement.

Key Figures

Shares proposed to be sold: 4,144 shares Approximate aggregate value: $110,000 Proposed sale date: September 2, 2026 +1 more

4 metrics

Shares proposed to be sold 4,144 shares Common Stock under Rule 144 for Courtney Phillips

Approximate aggregate value $110,000 Estimated value of 4,144 MAZE shares proposed for sale

Proposed sale date September 2, 2026 Date listed for sale of Common Stock on Nasdaq

RSU vesting date September 1, 2026 Date restricted stock units vested and settled

Key Terms

Rule 144, restricted stock units, equity incentive award, tax withholding obligations

4 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 units financial

"resulting from the vesting and settlement of restricted stock units granted"

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.

equity incentive award financial

"restricted stock units granted pursuant to an equity incentive award"

Equity incentive award is a grant of company ownership or the right to buy ownership—such as stock, restricted shares, or options—given to employees, executives, or directors as part of their pay. Investors care because these awards align workers’ interests with shareholders (like giving someone slices of a pie so they try to make the pie bigger), but they also dilute existing ownership and increase reported compensation costs, which can affect share value and earnings per share.

tax withholding obligations financial

"includes an amount necessary to satisfy tax withholding obligations resulting"

FAQ

What does the Form 144 filing disclose for MAZE?

It discloses that officer Courtney Phillips plans to sell up to 4,144 shares of Maze Therapeutics, Inc. common stock under Rule 144, with an indicated value of about $110,000, through Morgan Stanley Smith Barney on or after September 2, 2026.

How many MAZE shares are covered by Courtney Phillips’ planned Rule 144 sale?

The notice covers up to 4,144 shares of Maze Therapeutics, Inc. common stock. These shares are associated with the vesting and settlement of restricted stock units granted as part of an equity incentive award.

What is the approximate value of the MAZE shares in this Form 144?

The filing lists an aggregate value of about $110,000 for the 4,144 shares of Common Stock proposed to be sold on Nasdaq, based on the information provided for the planned sale dated September 2, 2026.

What is the source of the MAZE shares being sold by Courtney Phillips?

The shares come from restricted stock units that vested and settled on September 1, 2026. The RSUs were granted by Maze Therapeutics, Inc. as compensation under an equity incentive award.

Why does the Form 144 mention tax withholding for MAZE?

The remarks state that the reported sale was mandated by the issuer and includes an amount of shares necessary to satisfy tax withholding obligations resulting from the vesting and settlement of restricted stock units.

Which broker is handling the proposed MAZE share sale in this Form 144?

The proposed sale of 4,144 MAZE common shares is listed as being through Morgan Stanley Smith Barney LLC Executive Financial Services, located at 1 New York Plaza, New York, for trading on Nasdaq.

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

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Available on EDGAR 09/02/2026 - 07:05 PM Accepted by SEC EDGAR 09/02/2026 - 07:05 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	0001782758
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	MAZE THERAPEUTICS, INC.
SEC File Number	001-42490
Address of Issuer	171 OYSTER POINT BOULEVARD, SUITE 300 SOUTH SAN FRANCISCO CALIFORNIA 94080
Phone	650-850-5070
Name of Person for Whose Account the Securities are To Be Sold	Courtney Phillips
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 Stock	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza, 8th Floor New York NY 10004	4144	110000	55549168	09/02/2026	NASDAQ

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 Stock	09/01/2026	Restricted Stock Unit Vesting	Issuer			4144	09/01/2026	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	The reported sale was mandated by the Issuer and includes an amount necessary to satisfy tax withholding obligations resulting from the vesting and settlement of restricted stock units granted pursuant to an equity incentive award.
Date of Notice	09/02/2026
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/ Courtney Phillips
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)