Richard N. Townsend plans 3,345-share Lexeo sale

Lexeo Therapeutics, Inc. (LXEO) is the issuer for a planned sale of common stock under Rule 144 by Richard N. Townsend.

Rhea-AI Filing Summary

Lexeo Therapeutics, Inc. (LXEO) is the issuer for a planned sale of common stock under Rule 144 by Richard N. Townsend. A brokerage account at Fidelity Brokerage Services LLC indicates 3,345 shares of common stock are intended to be sold, with the securities becoming available through restricted stock vesting dated 08/17/2026. In the prior three months, Townsend reported sales of 3,342 shares on 05/18/2026 and 25,947 shares on 07/01/2026. The notice states that part of the sale proceeds will cover a tax obligation arising from the settlement of a vested equity award distribution.

Key Figures

Planned shares to be sold: 3,345 shares Value of brokerage position: 16561.76 Past sale on 05/18/2026: 3,342 shares +3 more

6 metrics

Planned shares to be sold 3,345 shares Common stock position indicated for sale through Fidelity Brokerage Services LLC

Value of brokerage position 16561.76 Reported value associated with the 3,345 common shares at the broker

Past sale on 05/18/2026 3,342 shares Common stock sold by Richard N. Townsend during the prior three months

Proceeds 05/18/2026 sale 16926.90 Amount associated with the 3,342-share sale on 05/18/2026

Past sale on 07/01/2026 25,947 shares Common stock sold by Richard N. Townsend during the prior three months

Proceeds 07/01/2026 sale 116185.48 Amount associated with the 25,947-share sale on 07/01/2026

Key Terms

Rule 144, restricted stock vesting, attorney-in-fact, equity award distribution

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 vesting financial

"Common | 08/17/2026 | 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 attorney-in-fact for Richard Townsend"

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.

equity award distribution financial

"resulting from the settlement of a vested equity award distribution."

FAQ

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

What does the Form 144 filing related to LXEO disclose about planned share sales?

The notice discloses that 3,345 shares of Lexeo Therapeutics common stock are planned to be sold under Rule 144 following restricted stock vesting on 08/17/2026. Part of the sale is intended to cover a tax obligation from a vested equity award.

Who is the selling securityholder in the LXEO Form 144 notice?

The planned Rule 144 sales involve shares held for the account of Richard N. Townsend, with Fidelity Brokerage Services LLC acting as broker. The filing also notes an attorney-in-fact relationship authorizing execution of the notice on Townsend’s behalf.

How many LXEO shares has Richard N. Townsend sold in the last three months?

The filing lists prior sales of 3,342 shares of Lexeo Therapeutics common stock on 05/18/2026 and 25,947 shares on 07/01/2026. These transactions are reported as required aggregation under Rule 144 for the three-month period.

What is the purpose of part of the LXEO share sale mentioned in the Form 144?

The remarks state that the sale includes an amount necessary to cover a tax obligation resulting from settlement of a vested equity award distribution. This indicates that a portion of the shares is being sold in connection with equity compensation taxes.

Through which broker will the planned LXEO Rule 144 sale be executed?

The securities are held at Fidelity Brokerage Services LLC, located at 900 Salem Street, Smithfield, RI 02917. Fidelity is identified in the notice as handling the common stock position and providing the duly authorized representative who signed the filing.

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

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Accepted by SEC EDGAR 08/18/2026 - 03:16 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	0001995218
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	Lexeo Therapeutics, Inc.
SEC File Number	001-41855
Address of Issuer	345 PARK AVENUE SOUTH FLOOR 6 NEW YORK NEW YORK 10010
Phone	(212) 547-9879
Name of Person for Whose Account the Securities are To Be Sold	Townsend Richard Nolan
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
Relationship to Issuer	Director

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	3345	16561.76	82046255	08/18/2026	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	08/17/2026	Restricted Stock Vesting	Issuer			3345	08/17/2026	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

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
Richard N. Townsend 345 Park Avenue South Floor 6 New York NY 10010	Common	05/18/2026	3342	16926.90
Richard N. Townsend 345 Park Avenue South Floor 6 New York NY 10010	Common	07/01/2026	25947	116185.48

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	08/18/2026
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/ Daniel Tucci, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Richard Townsend
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)