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[6-K] GSK plc American Current Report (Foreign Issuer)

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

GSK plc has completed the acquisition of BP Asset IX, Inc. from Boston Pharmaceuticals, gaining full rights to efimosfermin alfa, a Phase III–ready, once-monthly FGF21 analogue being developed for metabolic dysfunction-associated steatohepatitis (MASH) and alcohol-related liver disease (ALD). These two diseases are the leading causes of liver transplantation in the US and currently have limited treatment options.

The deal, disclosed via Form 6-K, is valued at up to US$2 billion, consisting of an upfront cash payment of US$1.2 billion and up to US$800 million in success-based milestones. In addition, GSK will assume tiered royalty obligations owed to Novartis. Management identifies efimosfermin as a "key growth opportunity" with a potential first commercial launch in 2029, and sees synergy with GSK'990, its in-house siRNA therapy for other steatotic liver disease (SLD) subsets.

Efimosfermin’s proposed antifibrotic mechanism is aimed at halting or reversing liver fibrosis in moderate to advanced MASH, including cirrhosis, and it may be positioned for combination therapy within GSK’s expanding hepatology franchise. The transaction reinforces GSK’s strategic emphasis on immune-mediated and fibro-inflammatory diseases across liver, lung and kidney.

No immediate earnings guidance changes were provided, but the large upfront payment will impact near-term cash outflows while clinical, regulatory and commercial risks remain until at least late-decade approval. Forward-looking statements are subject to the risk factors detailed in GSK’s 2024 Form 20-F and 2025 Q1 results.

GSK plc ha completato l'acquisizione di BP Asset IX, Inc. da Boston Pharmaceuticals, ottenendo i diritti esclusivi su efimosfermin alfa, un analogo FGF21 pronto per la fase III, somministrato una volta al mese, sviluppato per la steatoepatite associata a disfunzione metabolica (MASH) e la malattia epatica correlata all'alcol (ALD). Queste due patologie sono le principali cause di trapianto di fegato negli Stati Uniti e attualmente dispongono di opzioni terapeutiche limitate.

L'accordo, reso noto tramite il modulo 6-K, ha un valore fino a 2 miliardi di dollari USA, composto da un pagamento iniziale in contanti di 1,2 miliardi di dollari e fino a 800 milioni di dollari legati al raggiungimento di obiettivi di successo. Inoltre, GSK assumerà obblighi di royalty a scaglioni dovuti a Novartis. La direzione aziendale considera efimosfermin una “opportunità chiave di crescita” con un potenziale lancio commerciale previsto per il 2029, e ne prevede sinergie con GSK'990, la sua terapia siRNA interna per altri sottogruppi di malattie epatiche steatotiche (SLD).

Il meccanismo antifibrotico proposto di efimosfermin mira a fermare o invertire la fibrosi epatica in MASH da moderata a avanzata, inclusa la cirrosi, e potrebbe essere utilizzato in terapia combinata all'interno della crescente divisione di epatologia di GSK. La transazione rafforza l’attenzione strategica di GSK sulle malattie immuno-mediate e fibro-infiammatorie che coinvolgono fegato, polmoni e reni.

Non sono state fornite modifiche immediate alle previsioni sugli utili, ma il consistente pagamento iniziale influenzerà i flussi di cassa a breve termine, mentre i rischi clinici, regolatori e commerciali persisteranno almeno fino all’approvazione prevista entro la fine del decennio. Le dichiarazioni previsionali sono soggette ai fattori di rischio dettagliati nel modulo 20-F 2024 e nei risultati del primo trimestre 2025 di GSK.

GSK plc ha completado la adquisición de BP Asset IX, Inc. de Boston Pharmaceuticals, obteniendo los derechos completos sobre efimosfermin alfa, un análogo de FGF21 listo para fase III, administrado una vez al mes, desarrollado para la esteatohepatitis asociada a disfunción metabólica (MASH) y la enfermedad hepática relacionada con el alcohol (ALD). Estas dos enfermedades son las principales causas de trasplante de hígado en EE.UU. y actualmente tienen opciones de tratamiento limitadas.

El acuerdo, divulgado mediante el Formulario 6-K, está valorado en hasta 2 mil millones de dólares estadounidenses, que consiste en un pago inicial en efectivo de 1.2 mil millones de dólares y hasta 800 millones de dólares en hitos basados en el éxito. Además, GSK asumirá obligaciones de regalías escalonadas adeudadas a Novartis. La dirección identifica a efimosfermin como una "oportunidad clave de crecimiento" con un posible primer lanzamiento comercial en 2029, y ve sinergias con GSK'990, su terapia siARN interna para otros subgrupos de enfermedades hepáticas esteatósicas (SLD).

El mecanismo antifibrótico propuesto de efimosfermin está dirigido a detener o revertir la fibrosis hepática en MASH de moderada a avanzada, incluida la cirrosis, y podría posicionarse para terapia combinada dentro de la creciente franquicia de hepatología de GSK. La transacción refuerza el énfasis estratégico de GSK en enfermedades inmunomediadas y fibroinflamatorias que afectan al hígado, pulmón y riñón.

No se proporcionaron cambios inmediatos en las previsiones de ganancias, pero el gran pago inicial afectará los flujos de efectivo a corto plazo mientras que los riesgos clínicos, regulatorios y comerciales persisten al menos hasta la aprobación prevista para finales de la década. Las declaraciones prospectivas están sujetas a los factores de riesgo detallados en el Formulario 20-F 2024 y en los resultados del primer trimestre de 2025 de GSK.

GSK plc는 Boston Pharmaceuticals로부터 BP Asset IX, Inc.를 인수하여 대사 기능 장애 관련 지방간염(MASH) 및 알코올 관련 간질환(ALD) 치료를 위해 개발 중인 3상 준비 단계의 월 1회 투여 FGF21 유사체인 에피모스퍼민 알파에 대한 전면 권리를 확보했습니다. 이 두 질환은 미국에서 간 이식의 주요 원인으로, 현재 치료 옵션이 제한적입니다.

6-K 양식을 통해 공개된 이번 거래는 최대 20억 달러 규모로, 선불 현금 지급액 12억 달러와 성공 기반 마일스톤 최대 8억 달러로 구성되어 있습니다. 또한 GSK는 노바티스에 대한 단계별 로열티 의무도 인수합니다. 경영진은 에피모스퍼민을 "주요 성장 기회"로 보고 있으며, 2029년 첫 상업 출시를 목표로 하고, GSK의 자체 siRNA 치료제 GSK'990과의 시너지를 기대하고 있습니다.

에피모스퍼민의 제안된 항섬유화 기전은 중등도에서 진행된 MASH의 간 섬유증, 특히 간경변을 중단하거나 역전시키는 데 목적이 있으며, GSK의 확장 중인 간 질환 분야 내 병용 요법으로 활용될 수 있습니다. 이번 거래는 간, 폐, 신장에 걸친 면역 매개 및 섬유염증성 질환에 대한 GSK의 전략적 집중을 강화합니다.

즉각적인 수익 가이던스 변경은 없었으나, 대규모 선불 지급은 단기 현금 유출에 영향을 미칠 것이며, 임상, 규제 및 상업적 위험은 적어도 10년대 말 승인 시점까지 계속될 것입니다. 미래 예측 진술은 GSK의 2024년 20-F 양식 및 2025년 1분기 실적에 명시된 위험 요소를 따릅니다.

GSK plc a finalisé l'acquisition de BP Asset IX, Inc. auprès de Boston Pharmaceuticals, obtenant ainsi les droits exclusifs sur l'efimosférmine alpha, un analogue FGF21 prêt pour la phase III, administré une fois par mois, développé pour la stéatohépatite associée à une dysfonction métabolique (MASH) et la maladie hépatique liée à l'alcool (ALD). Ces deux maladies sont les principales causes de transplantation hépatique aux États-Unis et disposent actuellement de peu d'options thérapeutiques.

L'accord, révélé via le formulaire 6-K, est évalué à jusqu'à 2 milliards de dollars US, comprenant un paiement initial en espèces de 1,2 milliard de dollars et jusqu'à 800 millions de dollars de jalons basés sur le succès. De plus, GSK assumera des obligations de redevances échelonnées envers Novartis. La direction considère l'efimosférmine comme une "opportunité clé de croissance" avec un lancement commercial potentiel prévu en 2029, et voit une synergie avec GSK'990, sa thérapie siARN interne pour d'autres sous-groupes de maladies hépatiques stéatosiques (SLD).

Le mécanisme antifibrotique proposé de l'efimosférmine vise à arrêter ou inverser la fibrose hépatique dans les cas de MASH modérée à avancée, y compris la cirrhose, et pourrait être positionné en thérapie combinée au sein de la franchise hépatologie en expansion de GSK. Cette transaction renforce l'accent stratégique de GSK sur les maladies immuno-médiées et fibro-inflammatoires touchant le foie, les poumons et les reins.

Aucun changement immédiat des prévisions de bénéfices n'a été communiqué, mais le paiement initial important aura un impact sur les flux de trésorerie à court terme, tandis que les risques cliniques, réglementaires et commerciaux perdureront au moins jusqu'à l'approbation prévue d'ici la fin de la décennie. Les déclarations prospectives sont soumises aux facteurs de risque détaillés dans le formulaire 20-F 2024 de GSK et les résultats du premier trimestre 2025.

GSK plc hat die Übernahme von BP Asset IX, Inc. von Boston Pharmaceuticals abgeschlossen und sich damit die vollständigen Rechte an Efimosfermin alfa gesichert, einem für die Phase III bereitstehenden, einmal monatlich verabreichten FGF21-Analogon, das für die Behandlung der stoffwechselbedingten Steatohepatitis (MASH) und alkoholbedingten Lebererkrankungen (ALD) entwickelt wird. Diese beiden Krankheiten sind die Hauptursachen für Lebertransplantationen in den USA und haben derzeit begrenzte Behandlungsmöglichkeiten.

Der Deal, der über das Formular 6-K offengelegt wurde, hat einen Wert von bis zu 2 Milliarden US-Dollar, bestehend aus einer sofortigen Barzahlung von 1,2 Milliarden US-Dollar und bis zu 800 Millionen US-Dollar erfolgsabhängigen Meilensteinen. Zusätzlich übernimmt GSK gestaffelte Lizenzgebührenverpflichtungen gegenüber Novartis. Das Management sieht Efimosfermin als eine „wichtige Wachstumschance“ mit einem möglichen ersten kommerziellen Start im Jahr 2029 und sieht Synergien mit GSK'990, der firmeneigenen siRNA-Therapie für andere Untergruppen der steatotischen Lebererkrankung (SLD).

Der vorgeschlagene antifibrotische Wirkmechanismus von Efimosfermin zielt darauf ab, die Leberfibrose bei mittelschwerer bis fortgeschrittener MASH, einschließlich Zirrhose, zu stoppen oder umzukehren, und könnte innerhalb der wachsenden Hepatologie-Sparte von GSK als Kombinationstherapie eingesetzt werden. Die Transaktion stärkt GSKs strategischen Fokus auf immunvermittelte und fibroinflammatorische Erkrankungen der Leber, Lunge und Niere.

Es wurden keine unmittelbaren Änderungen der Gewinnprognosen bekannt gegeben, aber die hohe Vorauszahlung wird die kurzfristigen Cashflows belasten, während klinische, regulatorische und kommerzielle Risiken mindestens bis zur erwarteten Zulassung gegen Ende des Jahrzehnts bestehen bleiben. Zukunftsgerichtete Aussagen unterliegen den in GSKs 2024er Formular 20-F und den Ergebnissen des ersten Quartals 2025 aufgeführten Risikofaktoren.

Positive
  • Late-stage pipeline boost: Acquisition adds a Phase III–ready asset addressing large unmet SLD market.
  • Differentiated modality: Once-monthly FGF21 analogue may offer dosing and efficacy advantages over competitors.
  • Strategic fit: Strengthens GSK’s hepatology and fibro-inflammatory disease franchise, providing synergy with in-house siRNA program.
Negative
  • Significant cash outflow: US$1.2 billion upfront payment will pressure short-term free cash flow.
  • Execution risk: Approval not expected until 2029, leaving multiple clinical and regulatory hurdles.
  • Royalty and milestone obligations: Additional payments to Novartis could compress future margins.

Insights

TL;DR – Strategic pipeline expansion; modest near-term dilution, high long-term optionality.

The US$2 billion structure appears reasonable for a Phase III–ready asset addressing a multi-billion-dollar unmet need. GSK strengthens its hepatology presence and diversifies beyond vaccines and HIV. The once-monthly profile could differentiate efimosfermin against daily or weekly competitors. However, the earliest launch target of 2029 means five years of clinical, regulatory and reimbursement risk, and the sizable US$1.2 billion upfront will depress 2025 free cash flow. Overall, the transaction is strategically positive with neutral-to-slightly negative short-term financial impact.

TL;DR – High execution risk offsets strategic merit; impact largely neutral today.

While efimosfermin expands GSK’s late-stage pipeline, investors will discount the asset until Phase III data materialise. Competitive landscape includes Akero’s efruxifermin and Madrigal’s resmetirom. The cash payout heightens liquidity risk amid existing R&D commitments and upcoming patent expiries. From a portfolio standpoint, risk/reward skews positive over the long term but does not materially alter near-term valuation. I deem the disclosure not impactful to current trading yet worth monitoring.

GSK plc ha completato l'acquisizione di BP Asset IX, Inc. da Boston Pharmaceuticals, ottenendo i diritti esclusivi su efimosfermin alfa, un analogo FGF21 pronto per la fase III, somministrato una volta al mese, sviluppato per la steatoepatite associata a disfunzione metabolica (MASH) e la malattia epatica correlata all'alcol (ALD). Queste due patologie sono le principali cause di trapianto di fegato negli Stati Uniti e attualmente dispongono di opzioni terapeutiche limitate.

L'accordo, reso noto tramite il modulo 6-K, ha un valore fino a 2 miliardi di dollari USA, composto da un pagamento iniziale in contanti di 1,2 miliardi di dollari e fino a 800 milioni di dollari legati al raggiungimento di obiettivi di successo. Inoltre, GSK assumerà obblighi di royalty a scaglioni dovuti a Novartis. La direzione aziendale considera efimosfermin una “opportunità chiave di crescita” con un potenziale lancio commerciale previsto per il 2029, e ne prevede sinergie con GSK'990, la sua terapia siRNA interna per altri sottogruppi di malattie epatiche steatotiche (SLD).

Il meccanismo antifibrotico proposto di efimosfermin mira a fermare o invertire la fibrosi epatica in MASH da moderata a avanzata, inclusa la cirrosi, e potrebbe essere utilizzato in terapia combinata all'interno della crescente divisione di epatologia di GSK. La transazione rafforza l’attenzione strategica di GSK sulle malattie immuno-mediate e fibro-infiammatorie che coinvolgono fegato, polmoni e reni.

Non sono state fornite modifiche immediate alle previsioni sugli utili, ma il consistente pagamento iniziale influenzerà i flussi di cassa a breve termine, mentre i rischi clinici, regolatori e commerciali persisteranno almeno fino all’approvazione prevista entro la fine del decennio. Le dichiarazioni previsionali sono soggette ai fattori di rischio dettagliati nel modulo 20-F 2024 e nei risultati del primo trimestre 2025 di GSK.

GSK plc ha completado la adquisición de BP Asset IX, Inc. de Boston Pharmaceuticals, obteniendo los derechos completos sobre efimosfermin alfa, un análogo de FGF21 listo para fase III, administrado una vez al mes, desarrollado para la esteatohepatitis asociada a disfunción metabólica (MASH) y la enfermedad hepática relacionada con el alcohol (ALD). Estas dos enfermedades son las principales causas de trasplante de hígado en EE.UU. y actualmente tienen opciones de tratamiento limitadas.

El acuerdo, divulgado mediante el Formulario 6-K, está valorado en hasta 2 mil millones de dólares estadounidenses, que consiste en un pago inicial en efectivo de 1.2 mil millones de dólares y hasta 800 millones de dólares en hitos basados en el éxito. Además, GSK asumirá obligaciones de regalías escalonadas adeudadas a Novartis. La dirección identifica a efimosfermin como una "oportunidad clave de crecimiento" con un posible primer lanzamiento comercial en 2029, y ve sinergias con GSK'990, su terapia siARN interna para otros subgrupos de enfermedades hepáticas esteatósicas (SLD).

El mecanismo antifibrótico propuesto de efimosfermin está dirigido a detener o revertir la fibrosis hepática en MASH de moderada a avanzada, incluida la cirrosis, y podría posicionarse para terapia combinada dentro de la creciente franquicia de hepatología de GSK. La transacción refuerza el énfasis estratégico de GSK en enfermedades inmunomediadas y fibroinflamatorias que afectan al hígado, pulmón y riñón.

No se proporcionaron cambios inmediatos en las previsiones de ganancias, pero el gran pago inicial afectará los flujos de efectivo a corto plazo mientras que los riesgos clínicos, regulatorios y comerciales persisten al menos hasta la aprobación prevista para finales de la década. Las declaraciones prospectivas están sujetas a los factores de riesgo detallados en el Formulario 20-F 2024 y en los resultados del primer trimestre de 2025 de GSK.

GSK plc는 Boston Pharmaceuticals로부터 BP Asset IX, Inc.를 인수하여 대사 기능 장애 관련 지방간염(MASH) 및 알코올 관련 간질환(ALD) 치료를 위해 개발 중인 3상 준비 단계의 월 1회 투여 FGF21 유사체인 에피모스퍼민 알파에 대한 전면 권리를 확보했습니다. 이 두 질환은 미국에서 간 이식의 주요 원인으로, 현재 치료 옵션이 제한적입니다.

6-K 양식을 통해 공개된 이번 거래는 최대 20억 달러 규모로, 선불 현금 지급액 12억 달러와 성공 기반 마일스톤 최대 8억 달러로 구성되어 있습니다. 또한 GSK는 노바티스에 대한 단계별 로열티 의무도 인수합니다. 경영진은 에피모스퍼민을 "주요 성장 기회"로 보고 있으며, 2029년 첫 상업 출시를 목표로 하고, GSK의 자체 siRNA 치료제 GSK'990과의 시너지를 기대하고 있습니다.

에피모스퍼민의 제안된 항섬유화 기전은 중등도에서 진행된 MASH의 간 섬유증, 특히 간경변을 중단하거나 역전시키는 데 목적이 있으며, GSK의 확장 중인 간 질환 분야 내 병용 요법으로 활용될 수 있습니다. 이번 거래는 간, 폐, 신장에 걸친 면역 매개 및 섬유염증성 질환에 대한 GSK의 전략적 집중을 강화합니다.

즉각적인 수익 가이던스 변경은 없었으나, 대규모 선불 지급은 단기 현금 유출에 영향을 미칠 것이며, 임상, 규제 및 상업적 위험은 적어도 10년대 말 승인 시점까지 계속될 것입니다. 미래 예측 진술은 GSK의 2024년 20-F 양식 및 2025년 1분기 실적에 명시된 위험 요소를 따릅니다.

GSK plc a finalisé l'acquisition de BP Asset IX, Inc. auprès de Boston Pharmaceuticals, obtenant ainsi les droits exclusifs sur l'efimosférmine alpha, un analogue FGF21 prêt pour la phase III, administré une fois par mois, développé pour la stéatohépatite associée à une dysfonction métabolique (MASH) et la maladie hépatique liée à l'alcool (ALD). Ces deux maladies sont les principales causes de transplantation hépatique aux États-Unis et disposent actuellement de peu d'options thérapeutiques.

L'accord, révélé via le formulaire 6-K, est évalué à jusqu'à 2 milliards de dollars US, comprenant un paiement initial en espèces de 1,2 milliard de dollars et jusqu'à 800 millions de dollars de jalons basés sur le succès. De plus, GSK assumera des obligations de redevances échelonnées envers Novartis. La direction considère l'efimosférmine comme une "opportunité clé de croissance" avec un lancement commercial potentiel prévu en 2029, et voit une synergie avec GSK'990, sa thérapie siARN interne pour d'autres sous-groupes de maladies hépatiques stéatosiques (SLD).

Le mécanisme antifibrotique proposé de l'efimosférmine vise à arrêter ou inverser la fibrose hépatique dans les cas de MASH modérée à avancée, y compris la cirrhose, et pourrait être positionné en thérapie combinée au sein de la franchise hépatologie en expansion de GSK. Cette transaction renforce l'accent stratégique de GSK sur les maladies immuno-médiées et fibro-inflammatoires touchant le foie, les poumons et les reins.

Aucun changement immédiat des prévisions de bénéfices n'a été communiqué, mais le paiement initial important aura un impact sur les flux de trésorerie à court terme, tandis que les risques cliniques, réglementaires et commerciaux perdureront au moins jusqu'à l'approbation prévue d'ici la fin de la décennie. Les déclarations prospectives sont soumises aux facteurs de risque détaillés dans le formulaire 20-F 2024 de GSK et les résultats du premier trimestre 2025.

GSK plc hat die Übernahme von BP Asset IX, Inc. von Boston Pharmaceuticals abgeschlossen und sich damit die vollständigen Rechte an Efimosfermin alfa gesichert, einem für die Phase III bereitstehenden, einmal monatlich verabreichten FGF21-Analogon, das für die Behandlung der stoffwechselbedingten Steatohepatitis (MASH) und alkoholbedingten Lebererkrankungen (ALD) entwickelt wird. Diese beiden Krankheiten sind die Hauptursachen für Lebertransplantationen in den USA und haben derzeit begrenzte Behandlungsmöglichkeiten.

Der Deal, der über das Formular 6-K offengelegt wurde, hat einen Wert von bis zu 2 Milliarden US-Dollar, bestehend aus einer sofortigen Barzahlung von 1,2 Milliarden US-Dollar und bis zu 800 Millionen US-Dollar erfolgsabhängigen Meilensteinen. Zusätzlich übernimmt GSK gestaffelte Lizenzgebührenverpflichtungen gegenüber Novartis. Das Management sieht Efimosfermin als eine „wichtige Wachstumschance“ mit einem möglichen ersten kommerziellen Start im Jahr 2029 und sieht Synergien mit GSK'990, der firmeneigenen siRNA-Therapie für andere Untergruppen der steatotischen Lebererkrankung (SLD).

Der vorgeschlagene antifibrotische Wirkmechanismus von Efimosfermin zielt darauf ab, die Leberfibrose bei mittelschwerer bis fortgeschrittener MASH, einschließlich Zirrhose, zu stoppen oder umzukehren, und könnte innerhalb der wachsenden Hepatologie-Sparte von GSK als Kombinationstherapie eingesetzt werden. Die Transaktion stärkt GSKs strategischen Fokus auf immunvermittelte und fibroinflammatorische Erkrankungen der Leber, Lunge und Niere.

Es wurden keine unmittelbaren Änderungen der Gewinnprognosen bekannt gegeben, aber die hohe Vorauszahlung wird die kurzfristigen Cashflows belasten, während klinische, regulatorische und kommerzielle Risiken mindestens bis zur erwarteten Zulassung gegen Ende des Jahrzehnts bestehen bleiben. Zukunftsgerichtete Aussagen unterliegen den in GSKs 2024er Formular 20-F und den Ergebnissen des ersten Quartals 2025 aufgeführten Risikofaktoren.

 
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
 
Form 6-K
 
REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16
UNDER THE SECURITIES EXCHANGE ACT OF 1934
 
 
 
For the month of July 2025
 
Commission File Number 001-15170
 
 
GSK plc
(Translation of registrant's name into English)
 
 
79 New Oxford Street, London, WC1A 1DG
(Address of principal executive office)
 
 
 
Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.
 
Form 20-F . . . .X. . . . Form 40-F . . . . . . . .
 
 
 
Issued: 7 July 2025, London UK
 
GSK completes acquisition of efimosfermin, a potential best-in-class specialty medicine to treat and prevent progression of steatotic liver disease (SLD)
 
GSK plc (LSE/NYSE: GSK) today announced the completion of its previously announced acquisition of efimosfermin alfa from Boston Pharmaceuticals. Efimosfermin is a phase III-ready, potential best-in-class investigational specialty medicine aimed at treating and preventing the progression of SLD.
 
Efimosfermin is a novel, once-monthly fibroblast growth factor 21 (FGF21) analog therapeutic in clinical development for the treatment of metabolic dysfunction-associated steatohepatitis (MASH), including cirrhosis, and future development in alcohol-related liver disease (ALD), both forms of SLD. Currently, MASH and ALD have limited treatment options and are the leading causes of liver transplant in the US, representing a significant burden and cost on healthcare utilisation.1
 
GSK, based on its work in human genetics and disease phenotyping, believes efimosfermin has potential to address more advanced stages of SLD due to its direct antifibrotic mechanism of action, and sees opportunity in combination with GSK'990, a siRNA therapeutic in development for other subsets of patients with SLD.
 
Kaivan Khavandi, SVP & Global Head, Respiratory, Immunology & Inflammation R&D, GSK said: "The close of our acquisition for efimosfermin alfa represents a significant expansion of our hepatology pipeline aimed at addressing steatotic and viral drivers of liver disease. Efimosfermin is a key growth opportunity for GSK with multiple development options and potential first launch in 2029. We look forward to unlocking the potential of this medicine for patients."
 
GSK is driving innovation for a range of immune-mediated conditions by harnessing the science of the immune system and advanced technologies. The addition of efimosfermin further expands GSK's pipeline to address fibro inflammatory diseases in liver, lung and kidney, a key focus for the company.
 
Financial considerations
GSK has acquired BP Asset IX, Inc., a subsidiary of Boston Pharmaceuticals, to access efimosfermin. The total cash consideration for this acquisition amounts to up to $2 billion, comprising an upfront payment of $1.2 billion and up to $800 million in success-based milestone payments. GSK will also be responsible for success-based milestone payments as well as tiered royalties for efimosfermin owed to Novartis Pharma AG.
 
About efimosfermin alfa
Efimosfermin is an investigational, once-monthly subcutaneous injection of a long-acting variant of FGF21 that is designed to regulate key metabolic pathways to decrease liver fat, ameliorate liver inflammation, and reverse liver fibrosis in patients with MASH. Efimosfermin is currently in trials for moderate to advanced fibrosis, including cirrhosis and is not approved anywhere in the world.
 
About Boston Pharmaceuticals
Boston Pharmaceuticals is a clinical-stage biopharmaceutical company that leverages an experienced and committed drug development team to advance a portfolio of highly differentiated therapies that may address important unmet medical needs in serious liver diseases. Boston Pharmaceuticals is a portfolio company of B-Flexion, a private, entrepreneurial investment firm which manages the combined funds and investments associated with the Bertarelli family and also partners with sophisticated capital to meet the shared goal of delivering exceptional value over the generations, while also contributing positively to society.
 
About GSK research in hepatology 
GSK is currently investigating multiple potential treatments for patients with liver disease, including treatments for chronic hepatitis B, alcohol-related liver disease (ALD), and metabolic dysfunction-associated steatohepatitis (MASH). 
 
About GSK
GSK is a global biopharma company with a purpose to unite science, technology, and talent to get ahead of disease together. Find out more at gsk.com.
 
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Cautionary statement regarding forward-looking statements
GSK cautions investors that any forward-looking statements or projections made by GSK, including those made in this announcement, are subject to risks and uncertainties that may cause actual results to differ materially from those projected. Such factors include, but are not limited to, those described in the "Risk Factors" section in GSK's Annual Report on Form 20-F for 2024, and GSK's Q1 Results for 2025.
 
 
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References
1 Younossi et al. Hepatol Commun. 2023 Dec 22;8(1):e0352
 
 
 

 
 
SIGNATURES
 
 
Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorised.
 
GSK plc
 
(Registrant)
 
 
Date: July 07, 2025
 
 
 
 
By:/s/ VICTORIA WHYTE
--------------------------
 
 
 
Victoria Whyte
 
Authorised Signatory for and on
 
behalf of GSK plc

FAQ

How much is GSK (GSK) paying for efimosfermin alfa?

GSK will pay up to US$2 billion, consisting of a US$1.2 billion upfront and up to US$800 million in milestones.

What diseases will efimosfermin target?

The investigational therapy targets MASH and ALD, both forms of steatotic liver disease (SLD).

When could efimosfermin potentially launch?

Management indicates a potential first launch in 2029, subject to successful Phase III trials and regulatory approval.

How does efimosfermin work?

It is a long-acting FGF21 analogue designed to reduce liver fat, lower inflammation, and reverse fibrosis via an antifibrotic mechanism.

Will GSK owe additional royalties on efimosfermin sales?

Yes. Beyond milestone payments, GSK will pay tiered royalties to Novartis on future net sales.
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