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[SCHEDULE 13G/A] Mereo BioPharma Group plc American SEC Filing

Filing Impact
(Low)
Filing Sentiment
(Neutral)
Form Type
SCHEDULE 13G/A
Rhea-AI Filing Summary

Frazier Life Sciences entities report passive holdings in Mereo BioPharma (MREO), detailing share counts, ADS equivalents and ownership percentages. The filing shows Frazier Life Sciences Public Fund, L.P. directly holds 32,430,690 Ordinary Shares, represented by 6,486,138 American Depositary Shares, equal to 4.1% of the issuer's 795,001,444 outstanding Ordinary Shares used for the percentage calculation. Additional Frazier entities hold 8,941,155 Ordinary Shares (1.1%, 1,788,231 ADS), 4,065,485 Ordinary Shares (0.5%, 813,097 ADS) and 1,763,230 Ordinary Shares (0.2%, 352,646 ADS). Voting and dispositive power over these holdings is reported as shared, with no sole voting or dispositive power asserted by the listed reporting persons. The statement corrects prior attributions by clarifying that committee members of certain general partners are not attributed beneficial ownership of the shares held by the funds. The filing also includes a certification that the securities were not acquired to influence control of the issuer and disclaims that the reporting persons are necessarily members of a group or beneficial owners beyond what is expressly stated.

Entità di Frazier Life Sciences dichiarano partecipazioni passive in Mereo BioPharma (MREO), indicando il numero di azioni, l'equivalente in ADS e le percentuali di possesso. La comunicazione indica che Frazier Life Sciences Public Fund, L.P. detiene direttamente 32,430,690 Azioni Ordinarie, rappresentate da 6,486,138 American Depositary Shares, pari al 4.1% delle 795,001,444 Azioni Ordinarie in circolazione dell'emittente utilizzate per il calcolo della percentuale. Altre entità Frazier detengono 8,941,155 Azioni Ordinarie (1.1%, 1,788,231 ADS), 4,065,485 Azioni Ordinarie (0.5%, 813,097 ADS) e 1,763,230 Azioni Ordinarie (0.2%, 352,646 ADS). Il potere di voto e di disposizione su questi titoli è riportato come condiviso, senza che i soggetti che presentano la comunicazione rivendichino poteri di voto o di disposizione esclusivi. La dichiarazione corregge attribuzioni precedenti chiarendo che i membri dei comitati di alcuni general partner non sono considerati titolari effettivi delle azioni detenute dai fondi. Il deposito include inoltre una certificazione che i titoli non sono stati acquisiti per influenzare il controllo dell'emittente e precisa che i soggetti che presentano la comunicazione non sono necessariamente membri di un gruppo o titolari effettivi oltre quanto espressamente dichiarato.

Entidades de Frazier Life Sciences informan participaciones pasivas en Mereo BioPharma (MREO), detallando el número de acciones, el equivalente en ADS y los porcentajes de propiedad. El informe muestra que Frazier Life Sciences Public Fund, L.P. posee directamente 32,430,690 Acciones Ordinarias, representadas por 6,486,138 American Depositary Shares, equivalentes al 4.1% de las 795,001,444 Acciones Ordinarias en circulación del emisor utilizadas para el cálculo del porcentaje. Otras entidades de Frazier poseen 8,941,155 Acciones Ordinarias (1.1%, 1,788,231 ADS), 4,065,485 Acciones Ordinarias (0.5%, 813,097 ADS) y 1,763,230 Acciones Ordinarias (0.2%, 352,646 ADS). El poder de voto y de disposición sobre estas participaciones se declara como compartido, sin que las personas que presentan el informe afirmen tener poder exclusivo de voto o de disposición. La declaración corrige atribuciones previas aclarando que los miembros de los comités de ciertos socios generales no se atribuyen la propiedad beneficiaria de las acciones en poder de los fondos. El informe también incluye una certificación de que los valores no fueron adquiridos para influir en el control del emisor y señala que las personas que informan no son necesariamente miembros de un grupo ni propietarios beneficiarios más allá de lo que se declara expresamente.

Frazier Life Sciences 계열사는 Mereo BioPharma (MREO)에 대한 수동적 보유를 신고하며, 주식 수, ADS 환산 수 및 소유 비율을 상세히 기재했습니다. 제출 서류에 따르면 Frazier Life Sciences Public Fund, L.P.는 보통주 32,430,690주를 직접 보유하고 있으며, 이는 6,486,138개의 미국 예탁증서(ADS)에 해당하며, 백분율 계산에 사용된 발행주식 총수 795,001,444주의 4.1%에 해당합니다. 기타 Frazier 계열사는 보통주 8,941,155주(1.1%, 1,788,231 ADS), 4,065,485주(0.5%, 813,097 ADS) 및 1,763,230주(0.2%, 352,646 ADS)를 보유하고 있습니다. 이 보유에 대한 의결권 및 처분권은 공동 보유로 보고되었으며, 신고인들이 단독 의결권이나 단독 처분권을 주장하지는 않았습니다. 해당 보고서는 일부 일반 파트너의 위원회 구성원들이 펀드가 보유한 주식에 대한 실질적 소유권으로 귀속되지 않는다는 점을 명확히 하며 이전의 귀속을 정정합니다. 또한 이 제출서는 증권이 발행사에 대한 지배권을 행사하기 위해 취득된 것이 아님을 확인하고, 신고인들이 명시된 범위를 넘어 그룹의 구성원 또는 실소유주라고 단정할 수 없음을 밝힙니다.

Des entités de Frazier Life Sciences déclarent des participations passives dans Mereo BioPharma (MREO), en précisant le nombre d'actions, l'équivalent en ADS et les pourcentages de détention. Le dépôt indique que Frazier Life Sciences Public Fund, L.P. détient directement 32,430,690 actions ordinaires, représentées par 6,486,138 American Depositary Shares, soit 4,1% des 795,001,444 actions ordinaires en circulation de l'émetteur utilisées pour le calcul du pourcentage. D'autres entités Frazier détiennent 8,941,155 actions ordinaires (1.1%, 1,788,231 ADS), 4,065,485 actions ordinaires (0.5%, 813,097 ADS) et 1,763,230 actions ordinaires (0.2%, 352,646 ADS). Le pouvoir de vote et le pouvoir de disposition sur ces participations sont déclarés comme partagés, aucune des personnes déclarantes n'affirmant détenir un pouvoir de vote ou de disposition exclusif. La déclaration corrige des attributions antérieures en précisant que les membres de comités de certains commandités ne se voient pas attribuer la propriété bénéficiaire des actions détenues par les fonds. Le dépôt inclut également une certification que les titres n'ont pas été acquis dans le but d'influencer le contrôle de l'émetteur et décline l'idée que les personnes déclarante soient nécessairement membres d'un groupe ou détenteurs bénéficiaires au-delà de ce qui est expressément indiqué.

Frazier Life Sciences-Einheiten melden passive Beteiligungen an Mereo BioPharma (MREO) und geben Aktienzahlen, ADS-Äquivalente und Eigentumsanteile an. Die Einreichung zeigt, dass Frazier Life Sciences Public Fund, L.P. direkt 32,430,690 Stammaktien hält, dargestellt durch 6,486,138 American Depositary Shares, was 4,1% der für die Prozentberechnung herangezogenen 795,001,444 ausstehenden Stammaktien des Emittenten entspricht. Weitere Frazier-Einheiten halten 8,941,155 Stammaktien (1.1%, 1,788,231 ADS), 4,065,485 Stammaktien (0.5%, 813,097 ADS) und 1,763,230 Stammaktien (0.2%, 352,646 ADS). Stimmrechte und Verfügungsbefugnis über diese Bestände werden als gemeinsam angegeben, wobei die angegebenen meldepflichtigen Personen keine alleinigen Stimm- oder Verfügungsbefugnisse beanspruchen. Die Erklärung korrigiert frühere Zuschreibungen und stellt klar, dass Ausschussmitglieder bestimmter General Partner nicht als wirtschaftliche Eigentümer der von den Fonds gehaltenen Aktien zugerechnet werden. Die Einreichung enthält außerdem eine Bestätigung, dass die Wertpapiere nicht zum Zweck der Einflussnahme auf die Kontrolle des Emittenten erworben wurden, und weist darauf hin, dass die meldenden Personen nicht notwendigerweise Mitglieder einer Gruppe oder wirtschaftliche Eigentümer über das ausdrücklich Angegebene hinaus sind.

Positive
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Negative
  • None.

Insights

TL;DR: Passive fund disclosures show modest, shared positions in MREO without sole control, correcting earlier attribution errors.

The Schedule 13G/A provides transparent holdings by multiple Frazier-managed funds, with the largest position equal to 4.1% of outstanding ordinary shares as calculated by the filer. All holdings are reported with shared voting and dispositive power, and the filing explicitly corrects prior overstatements by removing attributions to investment committee members. For investors, this is a factual ownership update rather than a change in control signal: holdings remain below typical 5% thresholds that often attract additional scrutiny and the reporting persons affirm the securities were not acquired to influence control. Impact assessment: limited market-moving effect given sizes and passive classification.

TL;DR: Clarification of beneficial ownership and committee attribution improves governance transparency but shows no control intent.

The amendment clarifies governance attribution by stating that members of several investment committees are not to be treated as beneficial owners of the funds' holdings, correcting previous disclosures. The filing reiterates that the reporting persons do not claim group status and certifies the securities were not acquired to change or influence issuer control. From a governance perspective, this reduces ambiguity about who holds voting power and aligns public records with internal governance processes; it does not, however, indicate activist intent or operational influence.

Entità di Frazier Life Sciences dichiarano partecipazioni passive in Mereo BioPharma (MREO), indicando il numero di azioni, l'equivalente in ADS e le percentuali di possesso. La comunicazione indica che Frazier Life Sciences Public Fund, L.P. detiene direttamente 32,430,690 Azioni Ordinarie, rappresentate da 6,486,138 American Depositary Shares, pari al 4.1% delle 795,001,444 Azioni Ordinarie in circolazione dell'emittente utilizzate per il calcolo della percentuale. Altre entità Frazier detengono 8,941,155 Azioni Ordinarie (1.1%, 1,788,231 ADS), 4,065,485 Azioni Ordinarie (0.5%, 813,097 ADS) e 1,763,230 Azioni Ordinarie (0.2%, 352,646 ADS). Il potere di voto e di disposizione su questi titoli è riportato come condiviso, senza che i soggetti che presentano la comunicazione rivendichino poteri di voto o di disposizione esclusivi. La dichiarazione corregge attribuzioni precedenti chiarendo che i membri dei comitati di alcuni general partner non sono considerati titolari effettivi delle azioni detenute dai fondi. Il deposito include inoltre una certificazione che i titoli non sono stati acquisiti per influenzare il controllo dell'emittente e precisa che i soggetti che presentano la comunicazione non sono necessariamente membri di un gruppo o titolari effettivi oltre quanto espressamente dichiarato.

Entidades de Frazier Life Sciences informan participaciones pasivas en Mereo BioPharma (MREO), detallando el número de acciones, el equivalente en ADS y los porcentajes de propiedad. El informe muestra que Frazier Life Sciences Public Fund, L.P. posee directamente 32,430,690 Acciones Ordinarias, representadas por 6,486,138 American Depositary Shares, equivalentes al 4.1% de las 795,001,444 Acciones Ordinarias en circulación del emisor utilizadas para el cálculo del porcentaje. Otras entidades de Frazier poseen 8,941,155 Acciones Ordinarias (1.1%, 1,788,231 ADS), 4,065,485 Acciones Ordinarias (0.5%, 813,097 ADS) y 1,763,230 Acciones Ordinarias (0.2%, 352,646 ADS). El poder de voto y de disposición sobre estas participaciones se declara como compartido, sin que las personas que presentan el informe afirmen tener poder exclusivo de voto o de disposición. La declaración corrige atribuciones previas aclarando que los miembros de los comités de ciertos socios generales no se atribuyen la propiedad beneficiaria de las acciones en poder de los fondos. El informe también incluye una certificación de que los valores no fueron adquiridos para influir en el control del emisor y señala que las personas que informan no son necesariamente miembros de un grupo ni propietarios beneficiarios más allá de lo que se declara expresamente.

Frazier Life Sciences 계열사는 Mereo BioPharma (MREO)에 대한 수동적 보유를 신고하며, 주식 수, ADS 환산 수 및 소유 비율을 상세히 기재했습니다. 제출 서류에 따르면 Frazier Life Sciences Public Fund, L.P.는 보통주 32,430,690주를 직접 보유하고 있으며, 이는 6,486,138개의 미국 예탁증서(ADS)에 해당하며, 백분율 계산에 사용된 발행주식 총수 795,001,444주의 4.1%에 해당합니다. 기타 Frazier 계열사는 보통주 8,941,155주(1.1%, 1,788,231 ADS), 4,065,485주(0.5%, 813,097 ADS) 및 1,763,230주(0.2%, 352,646 ADS)를 보유하고 있습니다. 이 보유에 대한 의결권 및 처분권은 공동 보유로 보고되었으며, 신고인들이 단독 의결권이나 단독 처분권을 주장하지는 않았습니다. 해당 보고서는 일부 일반 파트너의 위원회 구성원들이 펀드가 보유한 주식에 대한 실질적 소유권으로 귀속되지 않는다는 점을 명확히 하며 이전의 귀속을 정정합니다. 또한 이 제출서는 증권이 발행사에 대한 지배권을 행사하기 위해 취득된 것이 아님을 확인하고, 신고인들이 명시된 범위를 넘어 그룹의 구성원 또는 실소유주라고 단정할 수 없음을 밝힙니다.

Des entités de Frazier Life Sciences déclarent des participations passives dans Mereo BioPharma (MREO), en précisant le nombre d'actions, l'équivalent en ADS et les pourcentages de détention. Le dépôt indique que Frazier Life Sciences Public Fund, L.P. détient directement 32,430,690 actions ordinaires, représentées par 6,486,138 American Depositary Shares, soit 4,1% des 795,001,444 actions ordinaires en circulation de l'émetteur utilisées pour le calcul du pourcentage. D'autres entités Frazier détiennent 8,941,155 actions ordinaires (1.1%, 1,788,231 ADS), 4,065,485 actions ordinaires (0.5%, 813,097 ADS) et 1,763,230 actions ordinaires (0.2%, 352,646 ADS). Le pouvoir de vote et le pouvoir de disposition sur ces participations sont déclarés comme partagés, aucune des personnes déclarantes n'affirmant détenir un pouvoir de vote ou de disposition exclusif. La déclaration corrige des attributions antérieures en précisant que les membres de comités de certains commandités ne se voient pas attribuer la propriété bénéficiaire des actions détenues par les fonds. Le dépôt inclut également une certification que les titres n'ont pas été acquis dans le but d'influencer le contrôle de l'émetteur et décline l'idée que les personnes déclarante soient nécessairement membres d'un groupe ou détenteurs bénéficiaires au-delà de ce qui est expressément indiqué.

Frazier Life Sciences-Einheiten melden passive Beteiligungen an Mereo BioPharma (MREO) und geben Aktienzahlen, ADS-Äquivalente und Eigentumsanteile an. Die Einreichung zeigt, dass Frazier Life Sciences Public Fund, L.P. direkt 32,430,690 Stammaktien hält, dargestellt durch 6,486,138 American Depositary Shares, was 4,1% der für die Prozentberechnung herangezogenen 795,001,444 ausstehenden Stammaktien des Emittenten entspricht. Weitere Frazier-Einheiten halten 8,941,155 Stammaktien (1.1%, 1,788,231 ADS), 4,065,485 Stammaktien (0.5%, 813,097 ADS) und 1,763,230 Stammaktien (0.2%, 352,646 ADS). Stimmrechte und Verfügungsbefugnis über diese Bestände werden als gemeinsam angegeben, wobei die angegebenen meldepflichtigen Personen keine alleinigen Stimm- oder Verfügungsbefugnisse beanspruchen. Die Erklärung korrigiert frühere Zuschreibungen und stellt klar, dass Ausschussmitglieder bestimmter General Partner nicht als wirtschaftliche Eigentümer der von den Fonds gehaltenen Aktien zugerechnet werden. Die Einreichung enthält außerdem eine Bestätigung, dass die Wertpapiere nicht zum Zweck der Einflussnahme auf die Kontrolle des Emittenten erworben wurden, und weist darauf hin, dass die meldenden Personen nicht notwendigerweise Mitglieder einer Gruppe oder wirtschaftliche Eigentümer über das ausdrücklich Angegebene hinaus sind.






Check the appropriate box to designate the rule pursuant to which this Schedule is filed:
Rule 13d-1(b)
Rule 13d-1(c)
Rule 13d-1(d)






SCHEDULE 13G




Comment for Type of Reporting Person: The shares listed in rows 6, 8 and 9 consist of 32,430,690 Ordinary Shares of the Issuer, represented by 6,486,138 American Depositary Shares held directly by Frazier Life Sciences Public Fund, L.P. The percentage listed in row 11 is calculated based on 795,001,444 Ordinary Shares outstanding on May 12, 2025 as set forth in the Issuer's Quarterly Report on Form 10-Q filed with the SEC on May 13, 2025.


SCHEDULE 13G




Comment for Type of Reporting Person: The shares listed in rows 6, 8 and 9 consist of 32,430,690 Ordinary Shares of the Issuer, represented by 6,486,138 American Depositary Shares held directly by Frazier Life Sciences Public Fund, L.P. The percentage listed in row 11 is calculated based on 795,001,444 Ordinary Shares outstanding on May 12, 2025 as set forth in the Issuer's Quarterly Report on Form 10-Q filed with the SEC on May 13, 2025.


SCHEDULE 13G




Comment for Type of Reporting Person: The shares listed in rows 6, 8 and 9 consist of 32,430,690 Ordinary Shares of the Issuer, represented by 6,486,138 American Depositary Shares held directly by Frazier Life Sciences Public Fund, L.P. The percentage listed in row 11 is calculated based on 795,001,444 Ordinary Shares outstanding on May 12, 2025 as set forth in the Issuer's Quarterly Report on Form 10-Q filed with the SEC on May 13, 2025.


SCHEDULE 13G




Comment for Type of Reporting Person: The shares listed in rows 6, 8 and 9 consist of 8,941,155 Ordinary Shares of the Issuer, represented by 1,788,231 American Depositary Shares held directly by Frazier Life Sciences Public Overage Fund, L.P. The percentage listed in row 11 is calculated based on 795,001,444 Ordinary Shares outstanding on May 12, 2025 as set forth in the Issuer's Quarterly Report on Form 10-Q filed with the SEC on May 13, 2025.


SCHEDULE 13G




Comment for Type of Reporting Person: The shares listed in rows 6, 8 and 9 consist of 8,941,155 Ordinary Shares of the Issuer, represented by 1,788,231 American Depositary Shares held directly by Frazier Life Sciences Public Overage Fund, L.P. The percentage listed in row 11 is calculated based on 795,001,444 Ordinary Shares outstanding on May 12, 2025 as set forth in the Issuer's Quarterly Report on Form 10-Q filed with the SEC on May 13, 2025.


SCHEDULE 13G




Comment for Type of Reporting Person: The shares listed in rows 6, 8 and 9 consist of 8,941,155 Ordinary Shares of the Issuer, represented by 1,788,231 American Depositary Shares held directly by Frazier Life Sciences Public Overage Fund, L.P. The percentage listed in row 11 is calculated based on 795,001,444 Ordinary Shares outstanding on May 12, 2025 as set forth in the Issuer's Quarterly Report on Form 10-Q filed with the SEC on May 13, 2025.


SCHEDULE 13G




Comment for Type of Reporting Person: The shares listed in rows 6, 8 and 9 consist of 1,763,230 Ordinary Shares of the Issuer, represented by 352,646 American Depositary Shares held directly by Frazier Life Sciences X, L.P. The percentage listed in row 11 is calculated based on 795,001,444 Ordinary Shares outstanding on May 12, 2025 as set forth in the Issuer's Quarterly Report on Form 10-Q filed with the SEC on May 13, 2025.


SCHEDULE 13G




Comment for Type of Reporting Person: The shares listed in rows 6, 8 and 9 consist of 1,763,230 Ordinary Shares of the Issuer, represented by 352,646 American Depositary Shares held directly by Frazier Life Sciences X, L.P. The percentage listed in row 11 is calculated based on 795,001,444 Ordinary Shares outstanding on May 12, 2025 as set forth in the Issuer's Quarterly Report on Form 10-Q filed with the SEC on May 13, 2025.


SCHEDULE 13G




Comment for Type of Reporting Person: The shares listed in rows 6, 8 and 9 consist of 1,763,230 Ordinary Shares of the Issuer, represented by 352,646 American Depositary Shares held directly by Frazier Life Sciences X, L.P. The percentage listed in row 11 is calculated based on 795,001,444 Ordinary Shares outstanding on May 12, 2025 as set forth in the Issuer's Quarterly Report on Form 10-Q filed with the SEC on May 13, 2025.


SCHEDULE 13G




Comment for Type of Reporting Person: The shares listed in rows 6, 8 and 9 consist of 4,065,485 Ordinary Shares of the Issuer, represented by 813,097 American Depositary Shares held directly by Frazier Life Sciences XI, L.P. The percentage listed in row 11 is calculated based on 795,001,444 Ordinary Shares outstanding on May 12, 2025 as set forth in the Issuer's Quarterly Report on Form 10-Q filed with the SEC on May 13, 2025.


SCHEDULE 13G




Comment for Type of Reporting Person: The shares listed in rows 6, 8 and 9 consist of 4,065,485 Ordinary Shares of the Issuer, represented by 813,097 American Depositary Shares held directly by Frazier Life Sciences XI, L.P. The percentage listed in row 11 is calculated based on 795,001,444 Ordinary Shares outstanding on May 12, 2025 as set forth in the Issuer's Quarterly Report on Form 10-Q filed with the SEC on May 13, 2025.


SCHEDULE 13G




Comment for Type of Reporting Person: The shares listed in rows 6, 8 and 9 consist of 4,065,485 Ordinary Shares of the Issuer, represented by 813,097 American Depositary Shares held directly by Frazier Life Sciences XI, L.P. The percentage listed in row 11 is calculated based on 795,001,444 Ordinary Shares outstanding on May 12, 2025 as set forth in the Issuer's Quarterly Report on Form 10-Q filed with the SEC on May 13, 2025.


SCHEDULE 13G




Comment for Type of Reporting Person: The shares listed in rows 6, 8 and 9 consist of 1,763,230 Ordinary Shares of the Issuer, represented by 352,646 American Depositary Shares held directly by Frazier Life Sciences X, L.P. The percentage listed in row 11 is calculated based on 795,001,444 Ordinary Shares outstanding on May 12, 2025 as set forth in the Issuer's Quarterly Report on Form 10-Q filed with the SEC on May 13, 2025.


SCHEDULE 13G




Comment for Type of Reporting Person: The shares listed in rows 6, 8 and 9 consist of 1,763,230 Ordinary Shares of the Issuer, represented by 352,646 American Depositary Shares held directly by Frazier Life Sciences X, L.P. The percentage listed in row 11 is calculated based on 795,001,444 Ordinary Shares outstanding on May 12, 2025 as set forth in the Issuer's Quarterly Report on Form 10-Q filed with the SEC on May 13, 2025.


SCHEDULE 13G





SCHEDULE 13G





SCHEDULE 13G





SCHEDULE 13G



Frazier Life Sciences Public Fund, L.P.
Signature:/s/ Steve R. Bailey
Name/Title:By Steve R. Bailey, CFO of FHMLSP, L.L.C., GP of FHMLSP, L.P., GP of Frazier Life Sciences Public Fund, L.P.
Date:08/14/2025
FHMLSP, L.P.
Signature:/s/ Steve R. Bailey
Name/Title:By Steve R. Bailey, CFO of FHMLSP, L.L.C., GP of FHMLSP, L.P.
Date:08/14/2025
FHMLSP, L.L.C.
Signature:/s/ Steve R. Bailey
Name/Title:By Steve R. Bailey, CFO of FHMLSP, L.L.C.
Date:08/14/2025
Frazier Life Sciences Public Overage Fund, L.P.
Signature:/s/ Steve R. Bailey
Name/Title:By Steve R. Bailey, CFO of FHMLSP Overage, L.L.C., GP of FHMLSP Overage, L.P., GP of Frazier Life Sciences Public Overage Fund, L.P.
Date:08/14/2025
FHMLSP Overage, L.P.
Signature:/s/ Steve R. Bailey
Name/Title:By Steve R. Bailey, CFO of FHMLSP Overage, L.L.C., GP of FHMLSP Overage, L.P.
Date:08/14/2025
FHMLSP Overage, L.L.C.
Signature:/s/ Steve R. Bailey
Name/Title:By Steve R. Bailey, CFO of FHMLSP Overage, L.L.C.
Date:08/14/2025
Frazier Life Sciences X, L.P.
Signature:/s/ Steve R. Bailey
Name/Title:By Steve R. Bailey, CFO of FHMLS X, L.L.C., GP of FHMLS X, L.P., GP of Frazier Life Sciences X, L.P.
Date:08/14/2025
FHMLS X, L.P.
Signature:/s/ Steve R. Bailey
Name/Title:By Steve R. Bailey, CFO of FHMLS X, L.L.C., GP of FHMLS X, L.P.
Date:08/14/2025
FHMLS X, L.L.C.
Signature:/s/ Steve R. Bailey
Name/Title:By Steve R. Bailey, CFO of FHMLS X, L.L.C.
Date:08/14/2025
Frazier Life Sciences XI, L.P.
Signature:/s/ Steve R. Bailey
Name/Title:By Steve R. Bailey, CFO of FHMLS XI, L.L.C., GP of FHMLS XI, L.P., GP of Frazier Life Sciences XI, L.P.
Date:08/14/2025
FHMLS XI, L.P.
Signature:/s/ Steve R. Bailey
Name/Title:By Steve R. Bailey, CFO of FHMLS XI, L.L.C., GP of FHMLS XI, L.P.
Date:08/14/2025
FHMLS XI, L.L.C.
Signature:/s/ Steve R. Bailey
Name/Title:By Steve R. Bailey, CFO of FHMLS XI, L.L.C.
Date:08/14/2025
James N. Topper
Signature:/s/ Steve R. Bailey
Name/Title:By Steve R. Bailey, Attorney-in-Fact for James N. Topper, pursuant to a Power of Attorney, a copy of which was filed with the SEC on July 31, 2017
Date:08/14/2025
Patrick J. Heron
Signature:/s/ Steve R. Bailey
Name/Title:By Steve R. Bailey, Attorney-in-Fact for Patrick J. Heron, pursuant to a Power of Attorney, a copy of which was filed with the SEC on July 31, 2017
Date:08/14/2025
Albert Cha
Signature:/s/ Steve R. Bailey
Name/Title:By Steve R. Bailey, Attorney-in-Fact for Albert Cha, pursuant to a Power of Attorney, a copy of which was filed with the SEC on August 16, 2021
Date:08/14/2025
James Brush
Signature:/s/ Steve R. Bailey
Name/Title:By Steve R. Bailey, Attorney-in-Fact for James Brush, pursuant to a Power of Attorney, a copy of which was filed with the SEC on August 16, 2021
Date:08/14/2025
Daniel Estes
Signature:/s/ Steve R. Bailey
Name/Title:By Steve R. Bailey, Attorney-in-Fact for Daniel Estes, pursuant to a Power of Attorney, a copy of which was filed with the SEC on April 18, 2022
Date:08/14/2025
Exhibit Information

Exhibit 99.1 Joint Filing Agreement, dated as of April 4, 2025, incorporated by reference into this Statement.

Mereo Biopharma

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