SNDX holder plans sale of 2,082 common shares

SNDX has a Form 144 notice covering a proposed sale of 2,082 shares of its common stock through Fidelity Brokerage Services LLC on NASDAQ, with an aggregate market value of 42,931.05.

Accepted by SEC EDGAR 02/06/2026 - 03:43 PM EST Learn about SEC filing dates

Rhea-AI Filing Summary

SNDX has a Form 144 notice covering a proposed sale of 2,082 shares of its common stock through Fidelity Brokerage Services LLC on NASDAQ, with an aggregate market value of 42,931.05.

The shares were acquired on 02/05/2026 via restricted stock vesting from the issuer as compensation, with payment also dated 02/05/2026. The filing notes that 86,914,838 shares of common stock are outstanding and includes the standard representation that the seller is not aware of undisclosed material adverse information about the issuer.

FAQ

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What does the SNDX Form 144 filing disclose?

The Form 144 filing for SNDX discloses a planned sale of 2,082 common shares on NASDAQ. The shares were recently acquired through restricted stock vesting and have an aggregate market value of 42,931.05, according to the information provided in the notice.

How many SNDX shares are planned for sale under this Form 144?

The filing covers a planned sale of 2,082 SNDX common shares. These shares are to be sold through Fidelity Brokerage Services LLC on NASDAQ, with the filing listing an aggregate market value of 42,931.05 for the transaction at the time of the notice.

How were the SNDX shares in this Form 144 acquired?

The 2,082 SNDX shares were acquired on 02/05/2026 via a restricted stock vesting transaction from the issuer. The form identifies the nature of payment as compensation, with the date of payment also recorded as 02/05/2026 for these shares.

What is the aggregate market value of SNDX shares to be sold?

The Form 144 lists an aggregate market value of 42,931.05 for the 2,082 SNDX common shares to be sold. This value is based on the market price at the time the notice was prepared and submitted for the planned NASDAQ sale.

How many SNDX shares are outstanding according to the Form 144?

The notice states that 86,914,838 SNDX common shares are outstanding. This figure provides context for the relative size of the proposed 2,082-share sale, as shown in the securities information table within the Form 144 filing.

Which broker and exchange are involved in the SNDX Form 144 sale?

The planned sale of SNDX shares is to be executed through Fidelity Brokerage Services LLC as the broker. The shares are listed for trading on the NASDAQ exchange, according to the securities information section of the Form 144 notice.

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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	0001495411
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	Syndax Pharmaceuticals Inc
SEC File Number	001-37708
Address of Issuer	730 THIRD AVENUE 9TH FLOOR NEW YORK NEW YORK 10017
Phone	781-419-1400
Name of Person for Whose Account the Securities are To Be Sold	Goldan Keith A.
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	2082	42931.05	86914838	02/06/2026	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	02/05/2026	Restricted Stock Vesting	Issuer			2082	02/05/2026	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	Sale includes an amount necessary to cover a tax obligation resulting from the settlement of a vested equity award distribution.
Date of Notice	02/06/2026
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/ Adam Gehring, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Keith A. Goldan
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)