SNDX insider files to sell 32,375 shares

SNDX filing notifies of a proposed sale of 32,375 shares of Common Stock on 07/08/2026 via the exercise of stock options with cash payment to the issuer.

Rhea-AI Filing Summary

SNDX filing notifies of a proposed sale of 32,375 shares of Common Stock on 07/08/2026 via the exercise of stock options with cash payment to the issuer. The filing also discloses a prior sale of 6,847 shares on 06/01/2026 for $130,024.53.

Insights

Securities Counsel

Form 144 notifies a planned sale tied to option exercise; proceeds flow to the issuer.

The notice lists a proposed sale of 32,375 shares on 07/08/2026

Timing, method, and cash‑flow treatment are stated as Exercise of Stock Options and Cash to the issuer; subsequent transaction details will appear in resale filings or broker reports.

Equity Capital Markets Analyst

The scale of the proposed sale is a routine officer/affiliate disposition; prior small sale is shown.

The filing shows a prior sale of 6,847 shares on 06/01/2026

Market impact depends on execution method and float; the notice itself is an administrative disclosure of intent, not a completed public sale.

Key Figures

Proposed sale: 32,375 shares Prior sale: 6,847 shares Proceeds of prior sale: $130,024.53

3 metrics

Proposed sale 32,375 shares to be sold on 07/08/2026 via exercise of stock options

Prior sale 6,847 shares sold on 06/01/2026 by Michael Metzger

Proceeds of prior sale $130,024.53 value reported for 6,847 shares sold on 06/01/2026

Key Terms

Exercise of Stock Options, Form 144, Issuer

3 terms

Exercise of Stock Options financial

"Securities To Be Sold: 07/08/2026 | Exercise of Stock Options"

Form 144 regulatory

"Filer Information | 144: Filer Information"

Form 144 is a document that investors must file with the government when they plan to sell a large number of shares of a company's stock. It helps ensure transparency so everyone knows how many shares are being sold and when, which can impact the stock's price.

Issuer financial

"Securities To Be Sold ... | Issuer | ... | Cash"

FAQ

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

What does SNDX's Form 144 report?

Form 144 reports a proposed sale of 32,375 shares of Common Stock on 07/08/2026 via exercise of stock options. It also shows a prior sale of 6,847 shares on 06/01/2026 for $130,024.53.

Who receives the cash from the transaction in the SNDX Form 144?

The filing indicates the transaction method as Exercise of Stock Options with Cash to the issuer on 07/08/2026. It therefore records proceeds being paid to the issuer rather than to selling holders.

Does the Form 144 show completed sales for SNDX?

The notice lists a prior completed sale of 6,847 shares on 06/01/2026 valued at $130,024.53. The proposed 32,375-share transaction is a notice of intent, not proof of execution.

What does 'Exercise of Stock Options' mean on the SNDX filing?

Exercise of Stock Options means option holders converted options into shares to be sold; the filing shows this as the method for the 32,375-share transaction on 07/08/2026, with cash paid to the issuer.

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

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Accepted by SEC EDGAR 07/08/2026 - 04:39 PM EDT 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	0001507220
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	7814191400
Name of Person for Whose Account the Securities are To Be Sold	MICHAEL METZGER
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	Director
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	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004	32375	752395.00	88610027	07/08/2026	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	07/08/2026	Exercise of Stock Options	Issuer			32375	07/08/2026	Cash

* 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

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
MICHAEL METZGER 730 Third Avenue, 9th Floor New York NY 10017	Common	06/01/2026	6847	130024.53

144: Remarks and Signature

Remarks
Date of Notice	07/08/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	03/10/2026
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/ Michael Metzger
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)