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[Form 4] Lexeo Therapeutics, Inc. Insider Trading Activity

Filing Impact
(Low)
Filing Sentiment
(Neutral)
Form Type
4
Rhea-AI Filing Summary

Louis Edward Tamayo, Chief Financial Officer of Lexeo Therapeutics, acquired equity awards in the issuer. The Form 4 reports receipt of 45,000 restricted stock units (RSUs), each convertible into one share, and a stock option to purchase 280,000 shares at an exercise price of $4.79 per share. The RSUs carry no cash price and vest over time: 25% vest on August 15, 2026, with the remainder vesting in periodic installments thereafter under the company’s standard schedule. The option has a 10-year contractual term expiring August 28, 2035, with 25% of the option shares vesting on August 15, 2026, and the rest vesting monthly in equal installments thereafter, all subject to continued service. After these reported transactions, the filing shows 45,000 shares beneficially owned from RSUs and 280,000 option shares outstanding.

Louis Edward Tamayo, Chief Financial Officer di Lexeo Therapeutics, ha acquisito premi in azioni dell’emittente. Il Modulo 4 segnala la ricezione di 45.000 restricted stock unit (RSU), ciascuna convertibile in una azione, e di un’opzione su azioni per acquistare 280.000 azioni a un prezzo di esercizio di $4,79 per azione. Le RSU non prevedono pagamento in contanti e maturano nel tempo: il 25% matura il 15 agosto 2026 e il resto matura con rate periodiche successive secondo il piano standard della società. L’opzione ha una durata contrattuale di 10 anni con scadenza il 28 agosto 2035; il 25% delle azioni oggetto dell’opzione matura il 15 agosto 2026 e il resto matura mensilmente in rate uguali, il tutto subordinato al proseguimento del rapporto di servizio. Dopo queste operazioni segnalate, la dichiarazione indica la proprietà beneficiaria di 45.000 azioni derivanti dalle RSU e di 280.000 azioni oggetto dell’opzione in essere.

Louis Edward Tamayo, Director Financiero de Lexeo Therapeutics, adquirió incentivos accionarios del emisor. El Formulario 4 informa la recepción de 45.000 unidades de acciones restringidas (RSU), cada una convertible en una acción, y una opción para comprar 280.000 acciones a un precio de ejercicio de $4,79 por acción. Las RSU no implican pago en efectivo y se consolidan con el tiempo: el 25% consolida el 15 de agosto de 2026 y el resto lo hace en cuotas periódicas posteriores según el calendario estándar de la compañía. La opción tiene un plazo contractual de 10 años con vencimiento el 28 de agosto de 2035; el 25% de las acciones de la opción consolida el 15 de agosto de 2026 y el resto consolida mensualmente en cuotas iguales, todo condicionado a la continuidad del servicio. Tras estas transacciones reportadas, el filing muestra 45.000 acciones de propiedad beneficiaria por las RSU y 280.000 acciones de la opción pendientes.

Louis Edward Tamayo, Lexeo Therapeutics의 최고재무책임자(CFO)는 발행사의 지분 보상을 취득했습니다. Form 4에는 각각 하나의 주식으로 전환 가능한 45,000개의 제한부주식단위(RSU)를 수령했으며, 주당 행사가격 $4.79280,000주를 매수할 수 있는 스톡옵션을 부여받았다고 보고되어 있습니다. RSU는 현금 대가가 없고 시간 경과에 따라 베스팅됩니다: 25%는 2026년 8월 15일에 베스트되고, 나머지는 회사의 표준 스케줄에 따라 이후 정기 분할로 베스트됩니다. 옵션의 계약 기간은 10년으로 2035년 8월 28일에 만료되며, 옵션 대상 주식의 25%는 2026년 8월 15일에 베스트되고 나머지는 이후 매월 동일 비율로 베스트되며 모두 계속 근무를 조건으로 합니다. 보고된 거래 이후, 제출서류에는 RSU에서 발생한 45,000주의 실소유 및 280,000주의 옵션 주식이 미결로 기재되어 있습니다.

Louis Edward Tamayo, directeur financier de Lexeo Therapeutics, a acquis des attributions de capital de l’émetteur. Le formulaire 4 signale la réception de 45 000 unités d’actions restreintes (RSU), chacune convertible en une action, ainsi qu’une option d’achat de 280 000 actions à un prix d’exercice de 4,79 $ par action. Les RSU n’impliquent aucun prix en espèces et se répartissent dans le temps : 25 % deviennent acquis le 15 août 2026, le reste devenant acquis par versements périodiques ultérieurs selon le calendrier standard de la société. L’option a une durée contractuelle de 10 ans expirant le 28 août 2035 ; 25 % des actions de l’option deviennent acquis le 15 août 2026 et le reste devient acquis mensuellement en parts égales, sous réserve de la poursuite du service. Après ces opérations déclarées, le dépôt indique 45 000 actions détenues à titre bénéficiaire provenant des RSU et 280 000 actions d’option en circulation.

Louis Edward Tamayo, Chief Financial Officer von Lexeo Therapeutics, erwarb Aktienzuwendungen des Emittenten. In Formular 4 wird der Erhalt von 45.000 Restricted Stock Units (RSUs) gemeldet, die jeweils in eine Aktie wandelbar sind, sowie einer Aktienoption zum Kauf von 280.000 Aktien zu einem Ausübungspreis von $4,79 pro Aktie. Die RSUs sind ohne Barzahlung und werden zeitlich gestaffelt übertragen: 25% werden am 15. August 2026 fällig, der Rest in nachfolgenden periodischen Raten gemäß dem üblichen Zeitplan des Unternehmens. Die Option hat eine vertragliche Laufzeit von 10 Jahren mit Ablauf am 28. August 2035; 25% der Optionsaktien werden am 15. August 2026 fällig und der Rest wird monatlich in gleichen Raten fällig, jeweils vorbehaltlich fortgesetzter Dienstzeit. Nach diesen gemeldeten Transaktionen weist die Einreichung 45.000 Aktien als wirtschaftliches Eigentum aus, die aus RSUs stammen, sowie 280.000 Optionsaktien, die ausstehen.

Positive
  • Significant equity alignment: CFO received 45,000 RSUs and a 280,000-share option, aligning management incentives with shareholders
  • Retention-focused vesting: Initial 25% vesting plus subsequent installments encourage continued service through vesting periods
Negative
  • Potential dilution: Settlement of RSUs and exercise of 280,000 options will increase outstanding shares if fully realized
  • Service-only vesting: Awards vest based on continued service with no disclosed performance conditions in this filing

Insights

TL;DR Significant option and RSU grants align CFO pay with long-term shareholder outcomes but create potential near-term dilution.

The award package—45,000 RSUs plus a 280,000-share option at a $4.79 strike—is structured with multi-year vesting and a 10-year option term, common for executive retention and performance alignment. The RSUs convert to common stock at no cash cost, increasing direct equity stake upon vesting. The option’s exercise price is fixed at $4.79 and will only yield value if the market price exceeds that level. Vesting cliffs (25% initial vesting) plus ongoing installments encourage retention through 2026 and beyond. For investors, the material elements are award size, vesting schedule, and strike price relative to market levels.

TL;DR Grants follow standard governance practice for executive compensation but warrant monitoring for dilution and incentive alignment.

The filing documents time-based equity awards granted to the CFO with explicit vesting mechanics: an initial 25% vesting event and subsequent periodic vesting. These provisions tie executive continued service to equity transfer, which supports retention. The existence of a large option position (280,000 shares) could be dilutive when exercised; disclosure does not indicate performance conditions beyond service. Investors should note the clear service-based vesting and the potential for future share issuance upon RSU settlement or option exercise.

Louis Edward Tamayo, Chief Financial Officer di Lexeo Therapeutics, ha acquisito premi in azioni dell’emittente. Il Modulo 4 segnala la ricezione di 45.000 restricted stock unit (RSU), ciascuna convertibile in una azione, e di un’opzione su azioni per acquistare 280.000 azioni a un prezzo di esercizio di $4,79 per azione. Le RSU non prevedono pagamento in contanti e maturano nel tempo: il 25% matura il 15 agosto 2026 e il resto matura con rate periodiche successive secondo il piano standard della società. L’opzione ha una durata contrattuale di 10 anni con scadenza il 28 agosto 2035; il 25% delle azioni oggetto dell’opzione matura il 15 agosto 2026 e il resto matura mensilmente in rate uguali, il tutto subordinato al proseguimento del rapporto di servizio. Dopo queste operazioni segnalate, la dichiarazione indica la proprietà beneficiaria di 45.000 azioni derivanti dalle RSU e di 280.000 azioni oggetto dell’opzione in essere.

Louis Edward Tamayo, Director Financiero de Lexeo Therapeutics, adquirió incentivos accionarios del emisor. El Formulario 4 informa la recepción de 45.000 unidades de acciones restringidas (RSU), cada una convertible en una acción, y una opción para comprar 280.000 acciones a un precio de ejercicio de $4,79 por acción. Las RSU no implican pago en efectivo y se consolidan con el tiempo: el 25% consolida el 15 de agosto de 2026 y el resto lo hace en cuotas periódicas posteriores según el calendario estándar de la compañía. La opción tiene un plazo contractual de 10 años con vencimiento el 28 de agosto de 2035; el 25% de las acciones de la opción consolida el 15 de agosto de 2026 y el resto consolida mensualmente en cuotas iguales, todo condicionado a la continuidad del servicio. Tras estas transacciones reportadas, el filing muestra 45.000 acciones de propiedad beneficiaria por las RSU y 280.000 acciones de la opción pendientes.

Louis Edward Tamayo, Lexeo Therapeutics의 최고재무책임자(CFO)는 발행사의 지분 보상을 취득했습니다. Form 4에는 각각 하나의 주식으로 전환 가능한 45,000개의 제한부주식단위(RSU)를 수령했으며, 주당 행사가격 $4.79280,000주를 매수할 수 있는 스톡옵션을 부여받았다고 보고되어 있습니다. RSU는 현금 대가가 없고 시간 경과에 따라 베스팅됩니다: 25%는 2026년 8월 15일에 베스트되고, 나머지는 회사의 표준 스케줄에 따라 이후 정기 분할로 베스트됩니다. 옵션의 계약 기간은 10년으로 2035년 8월 28일에 만료되며, 옵션 대상 주식의 25%는 2026년 8월 15일에 베스트되고 나머지는 이후 매월 동일 비율로 베스트되며 모두 계속 근무를 조건으로 합니다. 보고된 거래 이후, 제출서류에는 RSU에서 발생한 45,000주의 실소유 및 280,000주의 옵션 주식이 미결로 기재되어 있습니다.

Louis Edward Tamayo, directeur financier de Lexeo Therapeutics, a acquis des attributions de capital de l’émetteur. Le formulaire 4 signale la réception de 45 000 unités d’actions restreintes (RSU), chacune convertible en une action, ainsi qu’une option d’achat de 280 000 actions à un prix d’exercice de 4,79 $ par action. Les RSU n’impliquent aucun prix en espèces et se répartissent dans le temps : 25 % deviennent acquis le 15 août 2026, le reste devenant acquis par versements périodiques ultérieurs selon le calendrier standard de la société. L’option a une durée contractuelle de 10 ans expirant le 28 août 2035 ; 25 % des actions de l’option deviennent acquis le 15 août 2026 et le reste devient acquis mensuellement en parts égales, sous réserve de la poursuite du service. Après ces opérations déclarées, le dépôt indique 45 000 actions détenues à titre bénéficiaire provenant des RSU et 280 000 actions d’option en circulation.

Louis Edward Tamayo, Chief Financial Officer von Lexeo Therapeutics, erwarb Aktienzuwendungen des Emittenten. In Formular 4 wird der Erhalt von 45.000 Restricted Stock Units (RSUs) gemeldet, die jeweils in eine Aktie wandelbar sind, sowie einer Aktienoption zum Kauf von 280.000 Aktien zu einem Ausübungspreis von $4,79 pro Aktie. Die RSUs sind ohne Barzahlung und werden zeitlich gestaffelt übertragen: 25% werden am 15. August 2026 fällig, der Rest in nachfolgenden periodischen Raten gemäß dem üblichen Zeitplan des Unternehmens. Die Option hat eine vertragliche Laufzeit von 10 Jahren mit Ablauf am 28. August 2035; 25% der Optionsaktien werden am 15. August 2026 fällig und der Rest wird monatlich in gleichen Raten fällig, jeweils vorbehaltlich fortgesetzter Dienstzeit. Nach diesen gemeldeten Transaktionen weist die Einreichung 45.000 Aktien als wirtschaftliches Eigentum aus, die aus RSUs stammen, sowie 280.000 Optionsaktien, die ausstehen.

SEC Form 4
FORM 4 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
OMB APPROVAL
OMB Number: 3235-0287
Estimated average burden
hours per response: 0.5
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.
1. Name and Address of Reporting Person*
Tamayo Louis Edward

(Last) (First) (Middle)
C/O LEXEO THERAPEUTICS, INC.
345 PARK AVENUE SOUTH, FLOOR 6

(Street)
NEW YORK NY 10010

(City) (State) (Zip)
2. Issuer Name and Ticker or Trading Symbol
Lexeo Therapeutics, Inc. [ LXEO ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
Director 10% Owner
X Officer (give title below) Other (specify below)
Chief Financial Officer
3. Date of Earliest Transaction (Month/Day/Year)
08/29/2025
4. If Amendment, Date of Original Filed (Month/Day/Year)
6. Individual or Joint/Group Filing (Check Applicable Line)
X Form filed by One Reporting Person
Form filed by More than One Reporting Person
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V Amount (A) or (D) Price
Common Stock 08/29/2025 A 45,000(1) A $0 45,000(2) D
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year) 7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Stock Option (right to buy) $4.79 08/29/2025 A 280,000 (3) 08/28/2035 Common Stock 280,000 $0 280,000 D
Explanation of Responses:
1. The reported securities are restricted stock units ("RSUs"). Each RSU represents a contingent right to receive one share of Common Stock of the Issuer. Twenty-five percent (25%) of the RSUs shall vest on August 15, 2026, and 1/16th of the RSUs shall vest in quarterly installments thereafter on the Issuer's standard quarterly vesting dates, subject to the Reporting Person's continued service through each applicable vesting date.
2. The reported securities are RSUs.
3. 25% of the shares underlying the option vest and become exercisable on August 15, 2026, and 1/48th of the shares underlying the option shall vest in monthly installments thereafter, subject to the Reporting Person's continuous service.
/s/ Youjin Choi, Attorney-in-Fact 09/03/2025
** Signature of Reporting Person Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What equity awards did Lexeo (LXEO) CFO Louis Tamayo receive?

The CFO was granted 45,000 restricted stock units (RSUs) and a stock option to purchase 280,000 shares at an exercise price of $4.79 per share.

When do the RSUs and options vest for the LXEO CFO?

Both awards have an initial vesting of 25% on August 15, 2026; RSUs vest quarterly thereafter under the company’s standard schedule and option shares vest monthly thereafter until fully vested.

What is the exercise price and term of the option reported for LXEO?

The option exercise price is $4.79 and the option has an expiration date of August 28, 2035, giving a 10-year term from the reported transaction.

How many shares does the filing show as beneficially owned after the transaction?

The filing reports 45,000 shares from RSUs and 280,000 option shares beneficially owned following the reported transactions.

Are the RSUs priced or do they require payment to receive shares?

The RSUs are reported with a price of $0, indicating they convert to common stock without a cash purchase price upon vesting.
Lexeo Therapeutics Inc

NASDAQ:LXEO

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Biotechnology
Biological Products, (no Disgnostic Substances)
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United States
NEW YORK