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

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

Insider reported option disposals tied to a completed merger. Krishnan Viswanadhan, a director of CARGO Therapeutics, Inc. (CRGX), recorded transactions dated 08/19/2025 showing the disposition of two stock options as part of the companys sale to Concentra Biosciences, LLC. The merger consideration was $4.379 per share in cash plus one non-transferable contingent value right (CVR) per share. The filing shows cancellation/conversion mechanics under the Merger Agreement: outstanding options became vested and exercisable and, if not exercised before the mergers effective time, were converted into the right to receive cash equal to the excess of the cash amount over each options exercise price multiplied by the underlying shares and one CVR per underlying share. The reported derivative disposals were 3,173 options at $1.09 and 25,000 options at $4.35, with zero common shares owned following the transactions.

Insider ha segnalato cessioni di opzioni legate a una fusione completata. Krishnan Viswanadhan, membro del consiglio di CARGO Therapeutics, Inc. (CRGX), ha registrato transazioni in data 19/08/2025 che indicano la cessione di due opzioni azionarie nell'ambito della vendita della società a Concentra Biosciences, LLC. Il corrispettivo della fusione prevedeva 4,379$ per azione in contanti più un diritto di valore contingente non trasferibile (CVR) per azione. La comunicazione descrive le modalità di cancellazione/conversione previste dall'Accordo di Fusione: le opzioni in essere sono divenute maturate ed esercitabili e, se non esercitate entro il momento di efficacia della fusione, sono state convertite nel diritto a ricevere un importo in contanti pari all'eccedenza tra l'ammontare in contanti e il prezzo di esercizio di ciascuna opzione moltiplicato per le azioni sottostanti, oltre a un CVR per azione sottostante. Le cessioni di derivati riportate sono state di 3.173 opzioni a 1,09$ e 25.000 opzioni a 4,35$, con zero azioni ordinarie possedute dopo le operazioni.

Insider informó disposiciones de opciones vinculadas a una fusión completada. Krishnan Viswanadhan, director de CARGO Therapeutics, Inc. (CRGX), registró transacciones con fecha 19/08/2025 que muestran la enajenación de dos opciones sobre acciones como parte de la venta de la compañía a Concentra Biosciences, LLC. La contraprestación de la fusión fue de 4,379$ por acción en efectivo más un derecho contingente de valor no transferible (CVR) por acción. La presentación muestra la mecánica de cancelación/conversión según el Acuerdo de Fusión: las opciones pendientes pasaron a estar devengadas y ejercitables y, si no se ejercieron antes del momento de vigencia de la fusión, se convirtieron en el derecho a recibir efectivo equivalente al excedente entre el importe en efectivo y el precio de ejercicio de cada opción multiplicado por las acciones subyacentes, además de un CVR por acción subyacente. Las disposiciones de derivados reportadas fueron 3.173 opciones a 1,09$ y 25.000 opciones a 4,35$, quedando cero acciones ordinarias tras las transacciones.

인사이더는 완료된 합병과 관련된 옵션 처분을 보고했습니다. CARGO Therapeutics, Inc.(CRGX) 이사인 Krishnan Viswanadhan은 2025-08-19자 거래로 회사의 Concentra Biosciences, LLC 매각의 일환으로 두 건의 주식옵션 처분을 기록했습니다. 합병 대가는 주당 현금 4.379달러와 주당 양도 불가능한 조건부 가치권(CVR) 1개였습니다. 제출 자료에는 합병계약에 따른 취소/전환 방식이 명시되어 있는데, 미결제 옵션은 모두 가속 취득 및 행사 가능 상태가 되었고 합병 발효 시점 이전에 행사되지 않은 경우 각 옵션의 행사가격을 초과하는 현금금액에 해당하는 초과분(초과금액 × 기초주식수)과 기초주식당 CVR 1개를 받을 권리로 전환된다고 되어 있습니다. 보고된 파생상품 처분은 1.09달러의 3,173옵션과 4.35달러의 25,000옵션이며, 거래 완료 후 보유 보통주 수는 0주였습니다.

Un initié a déclaré des cessions d'options liées à une fusion achevée. Krishnan Viswanadhan, administrateur de CARGO Therapeutics, Inc. (CRGX), a enregistré des transactions datées du 19/08/2025 indiquant la cession de deux options sur actions dans le cadre de la vente de la société à Concentra Biosciences, LLC. La contrepartie de la fusion était de 4,379$ par action en numéraire plus un droit de valeur conditionnel non transférable (CVR) par action. le dossier détaille le mécanisme d'annulation/conversion prévu par l'accord de fusion : les options en cours sont devenues acquises et exerçables et, si elles n'étaient pas exercées avant la date d'effet de la fusion, elles ont été converties en droit de recevoir un montant en espèces égal à l'excédent entre le montant en espèces et le prix d'exercice de chaque option multiplié par les actions sous-jacentes, ainsi qu'un CVR par action sous-jacente. Les cessions de dérivés déclarées étaient de 3 173 options à 1,09$ et 25 000 options à 4,35$, avec zéro action ordinaire détenue après les opérations.

Insider meldete Veräußerungen von Optionen im Zusammenhang mit einer abgeschlossenen Fusion. Krishnan Viswanadhan, Direktor von CARGO Therapeutics, Inc. (CRGX), verbuchte Transaktionen vom 19.08.2025, die die Veräußerung von zwei Aktienoptionen im Rahmen des Verkaufs des Unternehmens an Concentra Biosciences, LLC zeigen. Die Fusionsgegenleistung betrug 4,379$ je Aktie in bar zuzüglich eines nicht übertragbaren Contingent Value Right (CVR) je Aktie. Die Einreichung beschreibt die Stornierungs-/Umwandlungsmechanik gemäß dem Fusionsvertrag: Ausstehende Optionen wurden unverfallbar und ausübbar, und wenn sie nicht vor dem Wirksamkeitszeitpunkt der Fusion ausgeübt wurden, wurden sie in das Recht umgewandelt, Bargeld in Höhe der Differenz zwischen dem Barbetrag und dem Ausübungspreis jeder Option multipliziert mit den zugrunde liegenden Aktien sowie ein CVR je zugrunde liegender Aktie zu erhalten. Die gemeldeten Derivatveräußerungen beliefen sich auf 3.173 Optionen zu 1,09$ und 25.000 Optionen zu 4,35$, wobei nach den Transaktionen keine Stammaktien mehr gehalten wurden.

Positive
  • Merger closed and consideration defined: filing confirms the $4.379 per-share cash payment plus one CVR per share.
  • In-the-money options converted to cash and CVRs: both reported option series had exercise prices below the cash amount, triggering cash settlement and CVR issuance.
Negative
  • No retained common shares reported: the reporting person shows zero common stock beneficially owned following the transactions.
  • Out-of-the-money option risk noted in agreement: options with exercise price equal to or above the cash amount were canceled for no consideration (general agreement term disclosed).

Insights

TL;DR: Directors options were cashed out in a merger for $4.379/share plus CVRs; filings confirm conversion and cancellation terms.

The Form 4 documents a transaction tied directly to a corporate acquisition. It discloses the mechanics by which in-the-money options were converted into a cash payout equal to the difference between the $4.379 per-share cash consideration and each options exercise price, plus issuance of CVRs. The filing lists two option groups totaling 28,173 underlying shares disposed on 08/19/2025 and reports zero post-transaction common shares held by the reporting person. For investors, this is a routine disclosure that confirms insider compensation instruments were settled in accordance with the Merger Agreement and that the transaction closed via tender offer followed by a merger.

TL;DR: The Merger Agreement triggered option vesting and cash/CVR conversion; filing quantifies the converted option positions.

The explanatory footnotes clarify standard post-closing treatment of equity awards: options became fully vested and exercisable immediately prior to the merger and, if not exercised, were cancelled in exchange for cash equal to the intrinsic value and one CVR per underlying share, with out-of-the-money options cancelled for no consideration. The reported disposed derivative positions (3,173 at $1.09 and 25,000 at $4.35) indicate the awards were in-the-money relative to the $4.379 cash consideration and thus subject to cash settlement and CVR issuance. This confirms the merger consideration structure and its application to equity awards.

Insider ha segnalato cessioni di opzioni legate a una fusione completata. Krishnan Viswanadhan, membro del consiglio di CARGO Therapeutics, Inc. (CRGX), ha registrato transazioni in data 19/08/2025 che indicano la cessione di due opzioni azionarie nell'ambito della vendita della società a Concentra Biosciences, LLC. Il corrispettivo della fusione prevedeva 4,379$ per azione in contanti più un diritto di valore contingente non trasferibile (CVR) per azione. La comunicazione descrive le modalità di cancellazione/conversione previste dall'Accordo di Fusione: le opzioni in essere sono divenute maturate ed esercitabili e, se non esercitate entro il momento di efficacia della fusione, sono state convertite nel diritto a ricevere un importo in contanti pari all'eccedenza tra l'ammontare in contanti e il prezzo di esercizio di ciascuna opzione moltiplicato per le azioni sottostanti, oltre a un CVR per azione sottostante. Le cessioni di derivati riportate sono state di 3.173 opzioni a 1,09$ e 25.000 opzioni a 4,35$, con zero azioni ordinarie possedute dopo le operazioni.

Insider informó disposiciones de opciones vinculadas a una fusión completada. Krishnan Viswanadhan, director de CARGO Therapeutics, Inc. (CRGX), registró transacciones con fecha 19/08/2025 que muestran la enajenación de dos opciones sobre acciones como parte de la venta de la compañía a Concentra Biosciences, LLC. La contraprestación de la fusión fue de 4,379$ por acción en efectivo más un derecho contingente de valor no transferible (CVR) por acción. La presentación muestra la mecánica de cancelación/conversión según el Acuerdo de Fusión: las opciones pendientes pasaron a estar devengadas y ejercitables y, si no se ejercieron antes del momento de vigencia de la fusión, se convirtieron en el derecho a recibir efectivo equivalente al excedente entre el importe en efectivo y el precio de ejercicio de cada opción multiplicado por las acciones subyacentes, además de un CVR por acción subyacente. Las disposiciones de derivados reportadas fueron 3.173 opciones a 1,09$ y 25.000 opciones a 4,35$, quedando cero acciones ordinarias tras las transacciones.

인사이더는 완료된 합병과 관련된 옵션 처분을 보고했습니다. CARGO Therapeutics, Inc.(CRGX) 이사인 Krishnan Viswanadhan은 2025-08-19자 거래로 회사의 Concentra Biosciences, LLC 매각의 일환으로 두 건의 주식옵션 처분을 기록했습니다. 합병 대가는 주당 현금 4.379달러와 주당 양도 불가능한 조건부 가치권(CVR) 1개였습니다. 제출 자료에는 합병계약에 따른 취소/전환 방식이 명시되어 있는데, 미결제 옵션은 모두 가속 취득 및 행사 가능 상태가 되었고 합병 발효 시점 이전에 행사되지 않은 경우 각 옵션의 행사가격을 초과하는 현금금액에 해당하는 초과분(초과금액 × 기초주식수)과 기초주식당 CVR 1개를 받을 권리로 전환된다고 되어 있습니다. 보고된 파생상품 처분은 1.09달러의 3,173옵션과 4.35달러의 25,000옵션이며, 거래 완료 후 보유 보통주 수는 0주였습니다.

Un initié a déclaré des cessions d'options liées à une fusion achevée. Krishnan Viswanadhan, administrateur de CARGO Therapeutics, Inc. (CRGX), a enregistré des transactions datées du 19/08/2025 indiquant la cession de deux options sur actions dans le cadre de la vente de la société à Concentra Biosciences, LLC. La contrepartie de la fusion était de 4,379$ par action en numéraire plus un droit de valeur conditionnel non transférable (CVR) par action. le dossier détaille le mécanisme d'annulation/conversion prévu par l'accord de fusion : les options en cours sont devenues acquises et exerçables et, si elles n'étaient pas exercées avant la date d'effet de la fusion, elles ont été converties en droit de recevoir un montant en espèces égal à l'excédent entre le montant en espèces et le prix d'exercice de chaque option multiplié par les actions sous-jacentes, ainsi qu'un CVR par action sous-jacente. Les cessions de dérivés déclarées étaient de 3 173 options à 1,09$ et 25 000 options à 4,35$, avec zéro action ordinaire détenue après les opérations.

Insider meldete Veräußerungen von Optionen im Zusammenhang mit einer abgeschlossenen Fusion. Krishnan Viswanadhan, Direktor von CARGO Therapeutics, Inc. (CRGX), verbuchte Transaktionen vom 19.08.2025, die die Veräußerung von zwei Aktienoptionen im Rahmen des Verkaufs des Unternehmens an Concentra Biosciences, LLC zeigen. Die Fusionsgegenleistung betrug 4,379$ je Aktie in bar zuzüglich eines nicht übertragbaren Contingent Value Right (CVR) je Aktie. Die Einreichung beschreibt die Stornierungs-/Umwandlungsmechanik gemäß dem Fusionsvertrag: Ausstehende Optionen wurden unverfallbar und ausübbar, und wenn sie nicht vor dem Wirksamkeitszeitpunkt der Fusion ausgeübt wurden, wurden sie in das Recht umgewandelt, Bargeld in Höhe der Differenz zwischen dem Barbetrag und dem Ausübungspreis jeder Option multipliziert mit den zugrunde liegenden Aktien sowie ein CVR je zugrunde liegender Aktie zu erhalten. Die gemeldeten Derivatveräußerungen beliefen sich auf 3.173 Optionen zu 1,09$ und 25.000 Optionen zu 4,35$, wobei nach den Transaktionen keine Stammaktien mehr gehalten wurden.

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
X
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*
Viswanadhan Krishnan

(Last) (First) (Middle)
C/O CARGO THERAPEUTICS, INC.
835 INDUSTRIAL ROAD, SUITE 400

(Street)
SAN CARLOS CA 94070

(City) (State) (Zip)
2. Issuer Name and Ticker or Trading Symbol
CARGO Therapeutics, Inc. [ CRGX ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
X Director 10% Owner
Officer (give title below) Other (specify below)
3. Date of Earliest Transaction (Month/Day/Year)
08/19/2025
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
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) $1.09 08/19/2025 D 3,173 (1)(2)(3) 10/26/2032 Common Stock 3,173 (1)(2)(3) 0 D
Stock Option (Right to Buy) $4.35 08/19/2025 D 25,000 (1)(2)(3) 06/17/2035 Common Stock 25,000 (1)(2)(3) 0 D
Explanation of Responses:
1. Disposed of pursuant to the Agreement and Plan of Merger (the "Merger Agreement"), dated as of July 7, 2025, by and among CARGO Therapeutics, Inc. (the "Issuer"), Concentra Biosciences, LLC ("Parent") and Concentra Merger Sub VII, Inc., a wholly owned subsidiary of Parent ("Merger Sub"). On August 18, 2025, Parent and Merger Sub completed a tender offer pursuant to the terms of the Merger Agreement for all outstanding shares of common stock of the Issuer (each, a "Share") for an offer price of (i) $4.379 per Share in cash (the "Cash Amount"), and (ii) one non-transferable contractual contingent value right (each, a "CVR"), subject to and in accordance with the terms of the Contingent Value Rights Agreement (the "CVR Agreement"), in each case, without interest, and subject to any applicable withholding taxes (the Cash Amount plus one CVR, collectively, the "Offer Price"). [continues to Footnote 2]
2. [continues from Footnote 1] Merger Sub thereafter merged with and into the Issuer, with the Issuer continuing as the surviving corporation and a wholly owned subsidiary of Parent (the "Merger"). As of immediately prior to and conditioned upon the effective time of the Merger, pursuant to the Merger Agreement, each outstanding option to purchase Shares (each, an "Option") became fully vested and exercisable, and to the extent not exercised prior to the effective time of the Merger, was canceled and converted into the right to receive (a) an amount in cash (without interest and subject to deduction for any required withholding tax) equal to the product of (1) the excess, if any, of the Cash Amount over the exercise price per share of each such Option and (2) the number of Shares underlying such Option immediately prior to the effective time of the Merger [continues to Footnote 3]
3. [continues from Footnote 2] and (b) one CVR in respect of each Share underlying such Option; provided, however, that if the exercise price per Share of any Option was equal to or greater than the Cash Amount that was then outstanding it was canceled for no consideration.
/s/ Halley Gilbert, as attorney-in-fact for Krishnan Viswanadhan 08/19/2025
** 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 did CRGX insider Krishnan Viswanadhan report on Form 4?

He reported disposal of 28,173 option shares on 08/19/2025 tied to the Merger, resulting in zero common shares owned following the transactions.

What was the merger consideration disclosed in the filing for CRGX?

The consideration was $4.379 per share in cash plus one non-transferable CVR per share.

How were outstanding options treated under the Merger Agreement?

Options became fully vested and exercisable and, if not exercised before the merger, were converted into cash equal to the excess of the cash amount over the exercise price multiplied by underlying shares and one CVR per share.

Which option series were disposed of by the reporting person?

3,173 options with $1.09 exercise price and 25,000 options with $4.35 exercise price were disposed of on 08/19/2025.

Did the filing indicate any options canceled for no consideration?

Yes, the Merger Agreement states options with exercise price equal to or greater than the cash amount were canceled for no consideration.
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Biotechnology
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United States
SAN CARLOS