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[Form 4] iRhythm Technologies, Inc Insider Trading Activity

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

I-Mab (IMAB) – Schedule 13D/A Amendment No. 1 (filed 8 Aug 2025)

The CBC Group-affiliated entities and their ultimate controller, Mr. Wei Fu, have amended their February 5 2025 Schedule 13D to separate their reporting from Everest Medicines, which continues to hold 42.5 million ordinary shares (≈16.1%). The Reporting Persons now explicitly disclaim any Section 13(d) “group” relationship with Everest and exclude those shares from their totals.

Key current ownership, calculated against 264.5 million ordinary shares outstanding after the company’s August 1 2025 follow-on offering:

  • Wei Fu: 27,492,595 shares (10.4%) – shared voting & dispositive power.
  • C-Bridge Capital GP, Ltd.: 23,369,824 shares (8.8%).
  • C-Bridge Healthcare Fund II, L.P. & GP: 14,153,710 shares (5.4%).
  • Other controlled vehicles (CBC Investment I-Mab, I-Bridge entities, Nova Aqua, etc.) each report 0.9%-4.5% stakes; all voting and dispositive power is shared with upstream entities.

The filing clarifies the ownership chain: British Virgin Islands, Hong Kong and Cayman entities ultimately roll up to C-Bridge Capital and Mr. Fu. Source of funds for all positions is “OO” (other). No new purchases or sales are disclosed; percentages changed solely due to the removal of Everest’s shares from the previous joint report.

Accordingly, Mr. Fu’s reportable influence drops from a de-facto >25% group position to 10.4%, reducing the likelihood of coordinated control actions.

I-Mab (IMAB) – Emendamento al Schedule 13D/A n. 1 (depositato l'8 agosto 2025)

Le entità affiliate al gruppo CBC e il loro controllore finale, il Sig. Wei Fu, hanno modificato il loro Schedule 13D del 5 febbraio 2025 per separare la loro segnalazione da quella di Everest Medicines, che continua a detenere 42,5 milioni di azioni ordinarie (circa il 16,1%). Le persone che effettuano la segnalazione negano esplicitamente qualsiasi relazione di “gruppo” ai sensi della Sezione 13(d) con Everest ed escludono tali azioni dai loro totali.

Principali partecipazioni attuali, calcolate su 264,5 milioni di azioni ordinarie in circolazione dopo l’offerta successiva del 1° agosto 2025:

  • Wei Fu: 27.492.595 azioni (10,4%) – potere di voto e dispositivi condivisi.
  • C-Bridge Capital GP, Ltd.: 23.369.824 azioni (8,8%).
  • C-Bridge Healthcare Fund II, L.P. & GP: 14.153.710 azioni (5,4%).
  • Altri veicoli controllati (CBC Investment I-Mab, entità I-Bridge, Nova Aqua, ecc.) riportano ciascuno partecipazioni tra lo 0,9% e il 4,5%; tutto il potere di voto e dispositivi è condiviso con entità superiori.

Il deposito chiarisce la catena di proprietà: entità delle Isole Vergini Britanniche, Hong Kong e Cayman sono ultimate controllate da C-Bridge Capital e dal Sig. Fu. La fonte dei fondi per tutte le posizioni è “OO” (altro). Non sono state comunicate nuove acquisizioni o vendite; le percentuali sono cambiate esclusivamente per la rimozione delle azioni di Everest dal precedente rapporto congiunto.

Di conseguenza, l’influenza segnalabile del Sig. Fu scende da una posizione di gruppo de facto superiore al 25% al 10,4%, riducendo la probabilità di azioni di controllo coordinate.

I-Mab (IMAB) – Enmienda No. 1 al Schedule 13D/A (presentada el 8 de agosto de 2025)

Las entidades afiliadas al grupo CBC y su controlador final, el Sr. Wei Fu, han modificado su Schedule 13D del 5 de febrero de 2025 para separar su reporte del de Everest Medicines, que sigue poseyendo 42.5 millones de acciones ordinarias (≈16.1%). Las personas que reportan niegan explícitamente cualquier relación de “grupo” bajo la Sección 13(d) con Everest y excluyen esas acciones de sus totales.

Principales participaciones actuales, calculadas sobre 264.5 millones de acciones ordinarias en circulación tras la oferta subsecuente del 1 de agosto de 2025:

  • Wei Fu: 27,492,595 acciones (10.4%) – poder de voto y dispositivo compartido.
  • C-Bridge Capital GP, Ltd.: 23,369,824 acciones (8.8%).
  • C-Bridge Healthcare Fund II, L.P. & GP: 14,153,710 acciones (5.4%).
  • Otros vehículos controlados (CBC Investment I-Mab, entidades I-Bridge, Nova Aqua, etc.) reportan participaciones entre 0.9% y 4.5%; todo el poder de voto y dispositivo se comparte con entidades superiores.

La presentación aclara la cadena de propiedad: entidades de las Islas Vírgenes Británicas, Hong Kong y Cayman que finalmente se consolidan en C-Bridge Capital y el Sr. Fu. La fuente de fondos para todas las posiciones es “OO” (otro). No se revelan nuevas compras o ventas; los porcentajes cambiaron únicamente por la exclusión de las acciones de Everest del reporte conjunto previo.

Por consiguiente, la influencia reportable del Sr. Fu disminuye de una posición de grupo de facto superior al 25% a un 10.4%, reduciendo la probabilidad de acciones coordinadas de control.

I-Mab (IMAB) – Schedule 13D/A 수정안 1호 (2025년 8월 8일 제출)

CBC 그룹 관련 법인들과 최종 통제자인 Wei Fu 씨는 2025년 2월 5일 제출한 Schedule 13D를 수정하여 Everest Medicines와의 보고를 분리했습니다. Everest Medicines는 여전히 4,250만 주(약 16.1%)의 보통주를 보유하고 있습니다. 보고자들은 이제 Everest와의 섹션 13(d) “그룹” 관계를 명확히 부인하며 해당 주식을 자신들의 총계에서 제외했습니다.

2025년 8월 1일 후속 공모 이후 발행 주식 총 2억 6,450만 주를 기준으로 한 주요 현재 보유 지분은 다음과 같습니다:

  • Wei Fu: 27,492,595주 (10.4%) – 의결권 및 처분권 공유.
  • C-Bridge Capital GP, Ltd.: 23,369,824주 (8.8%).
  • C-Bridge Healthcare Fund II, L.P. 및 GP: 14,153,710주 (5.4%).
  • 기타 통제 법인들(CBC Investment I-Mab, I-Bridge 법인, Nova Aqua 등)은 각각 0.9%-4.5% 지분을 보고하며, 모든 의결권과 처분권은 상위 법인들과 공유됩니다.

본 제출 문서는 소유 구조를 명확히 합니다: 영국령 버진아일랜드, 홍콩, 케이먼 법인들이 최종적으로 C-Bridge Capital과 Wei Fu 씨에 귀속됩니다. 모든 포지션의 자금 출처는 “OO”(기타)입니다. 신규 매수나 매도는 없으며, 비율 변화는 이전 공동 보고에서 Everest 주식 제외에 따른 것입니다.

따라서 Wei Fu 씨의 보고 가능한 영향력은 사실상 25% 초과 그룹 지분에서 10.4%로 감소하여, 공동 통제 행위 가능성이 줄어들었습니다.

I-Mab (IMAB) – Amendement n°1 au Schedule 13D/A (déposé le 8 août 2025)

Les entités affiliées au groupe CBC et leur contrôleur ultime, M. Wei Fu, ont modifié leur Schedule 13D du 5 février 2025 afin de dissocier leur déclaration de celle d’Everest Medicines, qui détient toujours 42,5 millions d’actions ordinaires (≈16,1%). Les personnes déclarantes nient explicitement toute relation de « groupe » au sens de la Section 13(d) avec Everest et excluent ces actions de leurs totaux.

Principales participations actuelles, calculées sur 264,5 millions d’actions ordinaires en circulation après l’offre de suivi du 1er août 2025 :

  • Wei Fu : 27 492 595 actions (10,4 %) – pouvoirs de vote et dispositifs partagés.
  • C-Bridge Capital GP, Ltd. : 23 369 824 actions (8,8 %).
  • C-Bridge Healthcare Fund II, L.P. & GP : 14 153 710 actions (5,4 %).
  • Autres véhicules contrôlés (CBC Investment I-Mab, entités I-Bridge, Nova Aqua, etc.) détiennent chacun entre 0,9 % et 4,5 % ; tous les pouvoirs de vote et dispositifs sont partagés avec des entités supérieures.

Le dépôt précise la chaîne de propriété : les entités des îles Vierges britanniques, de Hong Kong et des îles Caïmans se rattachent en dernier ressort à C-Bridge Capital et à M. Fu. La source des fonds pour toutes les positions est « OO » (autre). Aucune nouvelle acquisition ou vente n’est divulguée ; les pourcentages ont changé uniquement en raison de la retrait des actions d’Everest du rapport conjoint précédent.

En conséquence, l’influence déclarable de M. Fu chute d’une position de groupe de facto supérieure à 25 % à 10,4 %, réduisant ainsi la probabilité d’actions coordonnées de contrôle.

I-Mab (IMAB) – Schedule 13D/A Änderung Nr. 1 (eingereicht am 8. August 2025)

Die dem CBC-Konzern zugehörigen Einheiten und deren letztendlicher Kontrolleur, Herr Wei Fu, haben ihr Schedule 13D vom 5. Februar 2025 geändert, um ihre Meldung von Everest Medicines zu trennen, das weiterhin 42,5 Millionen Stammaktien hält (≈16,1%). Die meldenden Personen lehnen jegliche „Gruppen“-Beziehung gemäß Abschnitt 13(d) mit Everest ausdrücklich ab und schließen diese Aktien aus ihren Gesamtzahlen aus.

Wichtige aktuelle Beteiligungen, berechnet auf 264,5 Millionen ausstehende Stammaktien nach dem Nachfolgeangebot des Unternehmens am 1. August 2025:

  • Wei Fu: 27.492.595 Aktien (10,4%) – gemeinsames Stimm- und Verfügungsrecht.
  • C-Bridge Capital GP, Ltd.: 23.369.824 Aktien (8,8%).
  • C-Bridge Healthcare Fund II, L.P. & GP: 14.153.710 Aktien (5,4%).
  • Andere kontrollierte Vehikel (CBC Investment I-Mab, I-Bridge-Einheiten, Nova Aqua usw.) halten jeweils 0,9%-4,5% Beteiligungen; alle Stimm- und Verfügungsrechte werden mit übergeordneten Einheiten geteilt.

Die Einreichung klärt die Eigentumskette: Einheiten aus den Britischen Jungferninseln, Hongkong und den Cayman Islands führen letztlich zu C-Bridge Capital und Herrn Fu. Die Finanzierungsquelle für alle Positionen ist „OO“ (andere). Es werden keine neuen Käufe oder Verkäufe offengelegt; die prozentualen Änderungen resultieren ausschließlich aus der Entfernung der Everest-Aktien aus dem vorherigen gemeinsamen Bericht.

Demnach sinkt der meldepflichtige Einfluss von Herrn Fu von einer faktischen Gruppenposition von über 25 % auf 10,4 %, was die Wahrscheinlichkeit koordinierter Kontrollmaßnahmen verringert.

Positive
  • Improved ownership transparency: explicit separation from Everest removes ambiguity around a controlling group.
  • Reduced concentration risk: largest disclosed stake now 10.4%, potentially increasing free float and liquidity.
Negative
  • Perceived loss of strategic backing: removal of Everest’s 42.5 m shares lowers combined influence that might have supported strategic initiatives.
  • Ongoing complex control structure across multiple offshore entities may still obscure ultimate decision-making to some investors.

Insights

TL;DR: Filing splits from Everest, leaves Mr. Fu with 10.4% stake; no transaction, only reporting realignment.

The amendment is largely administrative. By severing the prior group with Everest Medicines, CBC-controlled vehicles now report a far smaller collective position. This lowers perceived takeover or activist risk and clarifies beneficial ownership chains ahead of I-Mab’s recent equity raise. No cash outflows, purchases or sales are noted; all shares were previously held. Impact on valuation should be limited, though the market may view the reduced block as positive for float liquidity. Overall, disclosure transparency improves but fundamentals unchanged.

I-Mab (IMAB) – Emendamento al Schedule 13D/A n. 1 (depositato l'8 agosto 2025)

Le entità affiliate al gruppo CBC e il loro controllore finale, il Sig. Wei Fu, hanno modificato il loro Schedule 13D del 5 febbraio 2025 per separare la loro segnalazione da quella di Everest Medicines, che continua a detenere 42,5 milioni di azioni ordinarie (circa il 16,1%). Le persone che effettuano la segnalazione negano esplicitamente qualsiasi relazione di “gruppo” ai sensi della Sezione 13(d) con Everest ed escludono tali azioni dai loro totali.

Principali partecipazioni attuali, calcolate su 264,5 milioni di azioni ordinarie in circolazione dopo l’offerta successiva del 1° agosto 2025:

  • Wei Fu: 27.492.595 azioni (10,4%) – potere di voto e dispositivi condivisi.
  • C-Bridge Capital GP, Ltd.: 23.369.824 azioni (8,8%).
  • C-Bridge Healthcare Fund II, L.P. & GP: 14.153.710 azioni (5,4%).
  • Altri veicoli controllati (CBC Investment I-Mab, entità I-Bridge, Nova Aqua, ecc.) riportano ciascuno partecipazioni tra lo 0,9% e il 4,5%; tutto il potere di voto e dispositivi è condiviso con entità superiori.

Il deposito chiarisce la catena di proprietà: entità delle Isole Vergini Britanniche, Hong Kong e Cayman sono ultimate controllate da C-Bridge Capital e dal Sig. Fu. La fonte dei fondi per tutte le posizioni è “OO” (altro). Non sono state comunicate nuove acquisizioni o vendite; le percentuali sono cambiate esclusivamente per la rimozione delle azioni di Everest dal precedente rapporto congiunto.

Di conseguenza, l’influenza segnalabile del Sig. Fu scende da una posizione di gruppo de facto superiore al 25% al 10,4%, riducendo la probabilità di azioni di controllo coordinate.

I-Mab (IMAB) – Enmienda No. 1 al Schedule 13D/A (presentada el 8 de agosto de 2025)

Las entidades afiliadas al grupo CBC y su controlador final, el Sr. Wei Fu, han modificado su Schedule 13D del 5 de febrero de 2025 para separar su reporte del de Everest Medicines, que sigue poseyendo 42.5 millones de acciones ordinarias (≈16.1%). Las personas que reportan niegan explícitamente cualquier relación de “grupo” bajo la Sección 13(d) con Everest y excluyen esas acciones de sus totales.

Principales participaciones actuales, calculadas sobre 264.5 millones de acciones ordinarias en circulación tras la oferta subsecuente del 1 de agosto de 2025:

  • Wei Fu: 27,492,595 acciones (10.4%) – poder de voto y dispositivo compartido.
  • C-Bridge Capital GP, Ltd.: 23,369,824 acciones (8.8%).
  • C-Bridge Healthcare Fund II, L.P. & GP: 14,153,710 acciones (5.4%).
  • Otros vehículos controlados (CBC Investment I-Mab, entidades I-Bridge, Nova Aqua, etc.) reportan participaciones entre 0.9% y 4.5%; todo el poder de voto y dispositivo se comparte con entidades superiores.

La presentación aclara la cadena de propiedad: entidades de las Islas Vírgenes Británicas, Hong Kong y Cayman que finalmente se consolidan en C-Bridge Capital y el Sr. Fu. La fuente de fondos para todas las posiciones es “OO” (otro). No se revelan nuevas compras o ventas; los porcentajes cambiaron únicamente por la exclusión de las acciones de Everest del reporte conjunto previo.

Por consiguiente, la influencia reportable del Sr. Fu disminuye de una posición de grupo de facto superior al 25% a un 10.4%, reduciendo la probabilidad de acciones coordinadas de control.

I-Mab (IMAB) – Schedule 13D/A 수정안 1호 (2025년 8월 8일 제출)

CBC 그룹 관련 법인들과 최종 통제자인 Wei Fu 씨는 2025년 2월 5일 제출한 Schedule 13D를 수정하여 Everest Medicines와의 보고를 분리했습니다. Everest Medicines는 여전히 4,250만 주(약 16.1%)의 보통주를 보유하고 있습니다. 보고자들은 이제 Everest와의 섹션 13(d) “그룹” 관계를 명확히 부인하며 해당 주식을 자신들의 총계에서 제외했습니다.

2025년 8월 1일 후속 공모 이후 발행 주식 총 2억 6,450만 주를 기준으로 한 주요 현재 보유 지분은 다음과 같습니다:

  • Wei Fu: 27,492,595주 (10.4%) – 의결권 및 처분권 공유.
  • C-Bridge Capital GP, Ltd.: 23,369,824주 (8.8%).
  • C-Bridge Healthcare Fund II, L.P. 및 GP: 14,153,710주 (5.4%).
  • 기타 통제 법인들(CBC Investment I-Mab, I-Bridge 법인, Nova Aqua 등)은 각각 0.9%-4.5% 지분을 보고하며, 모든 의결권과 처분권은 상위 법인들과 공유됩니다.

본 제출 문서는 소유 구조를 명확히 합니다: 영국령 버진아일랜드, 홍콩, 케이먼 법인들이 최종적으로 C-Bridge Capital과 Wei Fu 씨에 귀속됩니다. 모든 포지션의 자금 출처는 “OO”(기타)입니다. 신규 매수나 매도는 없으며, 비율 변화는 이전 공동 보고에서 Everest 주식 제외에 따른 것입니다.

따라서 Wei Fu 씨의 보고 가능한 영향력은 사실상 25% 초과 그룹 지분에서 10.4%로 감소하여, 공동 통제 행위 가능성이 줄어들었습니다.

I-Mab (IMAB) – Amendement n°1 au Schedule 13D/A (déposé le 8 août 2025)

Les entités affiliées au groupe CBC et leur contrôleur ultime, M. Wei Fu, ont modifié leur Schedule 13D du 5 février 2025 afin de dissocier leur déclaration de celle d’Everest Medicines, qui détient toujours 42,5 millions d’actions ordinaires (≈16,1%). Les personnes déclarantes nient explicitement toute relation de « groupe » au sens de la Section 13(d) avec Everest et excluent ces actions de leurs totaux.

Principales participations actuelles, calculées sur 264,5 millions d’actions ordinaires en circulation après l’offre de suivi du 1er août 2025 :

  • Wei Fu : 27 492 595 actions (10,4 %) – pouvoirs de vote et dispositifs partagés.
  • C-Bridge Capital GP, Ltd. : 23 369 824 actions (8,8 %).
  • C-Bridge Healthcare Fund II, L.P. & GP : 14 153 710 actions (5,4 %).
  • Autres véhicules contrôlés (CBC Investment I-Mab, entités I-Bridge, Nova Aqua, etc.) détiennent chacun entre 0,9 % et 4,5 % ; tous les pouvoirs de vote et dispositifs sont partagés avec des entités supérieures.

Le dépôt précise la chaîne de propriété : les entités des îles Vierges britanniques, de Hong Kong et des îles Caïmans se rattachent en dernier ressort à C-Bridge Capital et à M. Fu. La source des fonds pour toutes les positions est « OO » (autre). Aucune nouvelle acquisition ou vente n’est divulguée ; les pourcentages ont changé uniquement en raison de la retrait des actions d’Everest du rapport conjoint précédent.

En conséquence, l’influence déclarable de M. Fu chute d’une position de groupe de facto supérieure à 25 % à 10,4 %, réduisant ainsi la probabilité d’actions coordonnées de contrôle.

I-Mab (IMAB) – Schedule 13D/A Änderung Nr. 1 (eingereicht am 8. August 2025)

Die dem CBC-Konzern zugehörigen Einheiten und deren letztendlicher Kontrolleur, Herr Wei Fu, haben ihr Schedule 13D vom 5. Februar 2025 geändert, um ihre Meldung von Everest Medicines zu trennen, das weiterhin 42,5 Millionen Stammaktien hält (≈16,1%). Die meldenden Personen lehnen jegliche „Gruppen“-Beziehung gemäß Abschnitt 13(d) mit Everest ausdrücklich ab und schließen diese Aktien aus ihren Gesamtzahlen aus.

Wichtige aktuelle Beteiligungen, berechnet auf 264,5 Millionen ausstehende Stammaktien nach dem Nachfolgeangebot des Unternehmens am 1. August 2025:

  • Wei Fu: 27.492.595 Aktien (10,4%) – gemeinsames Stimm- und Verfügungsrecht.
  • C-Bridge Capital GP, Ltd.: 23.369.824 Aktien (8,8%).
  • C-Bridge Healthcare Fund II, L.P. & GP: 14.153.710 Aktien (5,4%).
  • Andere kontrollierte Vehikel (CBC Investment I-Mab, I-Bridge-Einheiten, Nova Aqua usw.) halten jeweils 0,9%-4,5% Beteiligungen; alle Stimm- und Verfügungsrechte werden mit übergeordneten Einheiten geteilt.

Die Einreichung klärt die Eigentumskette: Einheiten aus den Britischen Jungferninseln, Hongkong und den Cayman Islands führen letztlich zu C-Bridge Capital und Herrn Fu. Die Finanzierungsquelle für alle Positionen ist „OO“ (andere). Es werden keine neuen Käufe oder Verkäufe offengelegt; die prozentualen Änderungen resultieren ausschließlich aus der Entfernung der Everest-Aktien aus dem vorherigen gemeinsamen Bericht.

Demnach sinkt der meldepflichtige Einfluss von Herrn Fu von einer faktischen Gruppenposition von über 25 % auf 10,4 %, was die Wahrscheinlichkeit koordinierter Kontrollmaßnahmen verringert.

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).
X
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*
Patterson Chad

(Last) (First) (Middle)
C/O IRHYTHM TECHNOLOGIES, INC
699 8TH ST #600

(Street)
SAN FRANCISCO CA 94103

(City) (State) (Zip)
2. Issuer Name and Ticker or Trading Symbol
iRhythm Technologies, Inc. [ IRTC ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
Director 10% Owner
X Officer (give title below) Other (specify below)
Chief Commercial Officer
3. Date of Earliest Transaction (Month/Day/Year)
08/06/2025
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 08/06/2025 08/06/2025 S 2,555(1) D $158.97 43,667 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
Explanation of Responses:
1. The sale reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan established by the reporting person on November 25, 2024.
Remarks:
/s/ Marc Rosenbaum, attorney-in-fact 08/07/2025
** 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

How much of I-Mab does Wei Fu now control?

Wei Fu shares voting and dispositive power over 27,492,595 ordinary shares (10.4%).

Did the CBC Group sell any IMAB shares in this filing?

No. The amendment reflects reporting separation, not share transactions; holdings remain unchanged.

Why were Everest Medicines’ shares excluded this time?

The Reporting Persons disclaimed any Section 13(d) group with Everest and will file separately going forward.

What is the largest entity stake after the amendment?

C-Bridge Capital GP, Ltd. controls 23,369,824 shares, representing 8.8% of outstanding ordinary shares.

How were ownership percentages calculated?

Percentages use the 264,485,455 ordinary shares outstanding post offering, per the issuer’s 1 Aug 2025 prospectus supplement.
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