AGIO: Insider Form 144 — RSU Vesting, Small Dispositions

Tsveta Milanova submitted a Form 144 notice relating to proposed sales of Common Stock and records a vesting of Restricted Stock Units on 03/02/2026 for 2,868 shares.

Rhea-AI Filing Summary

Tsveta Milanova submitted a Form 144 notice relating to proposed sales of Common Stock and records a vesting of Restricted Stock Units on 03/02/2026 for 2,868 shares. The filing lists two recent dispositions: 2,932 shares on 12/30/2025 and 2,872 shares on 01/05/2026.

Insights

Corporate Governance Analyst

Routine Form 144 notice showing small insider dispositions and an RSU vesting.

The filing documents a vesting of 2,868 restricted stock units on 03/02/2026 and two recent share dispositions of 2,932 and 2,872 shares on 12/30/2025 and 01/05/2026, respectively. The broker listed is Morgan Stanley Smith Barney LLC.

These entries are procedural: they record transactions and a vesting event. Subsequent filings or broker reports may disclose whether any registered resale follows the Form 144 submission.

FAQ

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

What does AGIO's Form 144 disclose about recent insider sales?

It records two recent dispositions: 2,932 shares on 12/30/2025 and 2,872 shares on 01/05/2026. The filing lists the transactions by date and share count, identifying the reporting person and broker; it does not include sale proceeds or prices in the excerpt.

Did AGIO report any equity vesting in the Form 144 filing?

Yes — a vesting of Restricted Stock Units for 2,868 shares is shown on 03/02/2026. The entry labels the event as a vesting of RSUs and ties it to the issuer and date in the filing excerpt.

Who is the reporting person named in the AGIO Form 144?

The filing names Tsveta Milanova with an address in Cambridge, MA, as the reporting person. The excerpt lists her name and two recent share dispositions alongside broker information for the notice.

Which broker is listed on the AGIO Form 144 notice?

Morgan Stanley Smith Barney LLC is listed as the broker in the filing excerpt. The broker entry includes an address at 1 New York Plaza and appears alongside the securities and transaction information in the notice.

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

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Accepted by SEC EDGAR 03/02/2026 - 04:05 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	0001957180
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	AGIOS PHARMACEUTICALS, INC.
SEC File Number	001-36014
Address of Issuer	88 SIDNEY STREET CAMBRIDGE MASSACHUSETTS 02139
Phone	617-649-8600
Name of Person for Whose Account the Securities are To Be Sold	Milanova Tsveta
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	2868	86700.00	58592172	03/02/2026	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	03/02/2026	Vesting of Restricted Stock Units	Issuer			2868	03/02/2026	Not Applicable

* 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
Tsveta Milanova 88 Sidney Street Cambridge MA 02139	Common Stock	12/30/2025	2932	79428.00
Tsveta Milanova 88 Sidney Street Cambridge MA 02139	Common Stock	01/05/2026	2872	77601.00

144: Remarks and Signature

Remarks
Date of Notice	03/02/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	03/01/2025
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	William Cook, attorney-in-fact for Tsveta Milanova
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)