LXEO Form 144: Notice for 4,666 Common Shares

LXEO files a Form 144 notice regarding proposed sales of Common Stock.

Rhea-AI Filing Summary

LXEO files a Form 144 notice regarding proposed sales of Common Stock. The excerpt lists 4,666 shares in a "Securities To Be Sold" row dated 07/01/2026 and references a Restricted Stock Vesting event on 06/29/2026 tied to compensation. The filing names Fidelity Brokerage Services LLC as a broker/holder.

Insights

Securities Compliance Attorney

Notice of proposed resale tied to vested restricted shares; procedural filing.

The filing lists proposed sales of Common Stock that appear linked to a Restricted Stock Vesting event dated 06/29/2026. The presence of a broker name, Fidelity Brokerage Services LLC, is consistent with an intermediary handling resale activity.

Timing and cash‑flow treatment are not stated in the excerpt; subsequent filings or broker reports would clarify whether sales occur and the proceeds recipient. The excerpt is procedural and does not itself consummate any transaction.

Key Figures

Shares listed to be sold: 4,666 shares Restricted stock vesting date: 06/29/2026 Broker/holder name: Fidelity Brokerage Services LLC +4 more

7 metrics

Shares listed to be sold 4,666 shares Displayed in "Securities To Be Sold" row dated 07/01/2026

Restricted stock vesting date 06/29/2026 Listed as "Restricted Stock Vesting" tied to compensation

Broker/holder name Fidelity Brokerage Services LLC Named with Smithfield, RI address in securities line

Form reference date 07/01/2026 Appears adjacent to securities row (filing line date)

Prior sales note 1,302 shares Listed under "Securities Sold During The Past 3 Months" with date 05/18/2026

Numeric value 6,606.35 Appears on same line as 1,302 and 05/18/2026 (unit not specified)

Large numeric string 78,521,634 Present in securities row (context not labeled in excerpt)

Key Terms

Restricted Stock Vesting, Form 144, Securities To Be Sold

3 terms

Restricted Stock Vesting financial

"Restricted Stock Vesting | Issuer | 4666 | 06/29/2026"

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.

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.

Securities To Be Sold regulatory

"144: Securities To Be Sold | Common | 06/29/2026"

FAQ

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

What does LXEO's Form 144 mean?

A Form 144 notifies the SEC of a proposed resale of restricted or control securities. This excerpt lists 4,666 shares and a 06/29/2026 restricted stock vesting event, indicating the filer intends to offer vested shares for sale under securities resale rules.

Who is listed as the broker or holder on LXEO's filing?

The excerpt names Fidelity Brokerage Services LLC at a Smithfield, RI address. That party appears in the "Securities To Be Sold" row and likely serves as the broker or the holding firm for the proposed resale transaction.

Are the shares already sold according to this excerpt?

No—Form 144 is a notice of proposed sale, not proof of completion. The excerpt shows a proposed sale entry of 4,666 shares dated 07/01/2026; actual sale completion is not shown in the provided text.

What triggered the ability to sell these LXEO shares?

The excerpt cites a Restricted Stock Vesting event on 06/29/2026 labeled "Compensation," indicating vesting created the shares subject to resale notification in this Form 144 filing.

Does the excerpt state who receives proceeds from any sale?

The provided excerpt does not specify proceeds recipients. It lists a broker and the shares to be sold but does not state the cash‑flow treatment or who will receive sale proceeds.

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

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Accepted by SEC EDGAR 07/01/2026 - 04:54 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	0002024096
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	Otero Jose Manuel
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	4666	20919.08	78521634	07/01/2026	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	06/29/2026	Restricted Stock Vesting	Issuer			4666	06/29/2026	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
Jose M. Otero 345 Park Avenue South Floor 6 New York NY 10010	Common	05/18/2026	1302	6606.35

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	07/01/2026
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 Jose M. Otero
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)