Sobi to showcase new data across haemophilia portfolio at ISTH 2026

New analyses and real-world evidence highlight outcomes with Altuvoct®, Elocta® and Alprolix® in haemophilia A and B

STOCKHOLM, June 30, 2026 /PRNewswire/ -- Sobi® today announced new data across its haemophilia portfolio will be presented at the 2026 Congress of the International Society on Thrombosis and Haemostasis (ISTH), taking place in Paris, from 11–15 July 2026. Presentations include new analyses and real-world evidence evaluating treatment outcomes with Altuvoct, Elocta and Alprolix in people living with haemophilia A and B.

The data being presented include oral and poster presentations evaluating joint health outcomes, bleeding outcomes, perioperative management and real-world treatment experience across multiple patient populations and clinical settings.

"People living with haemophilia continue to seek treatment approaches that can support long-term bleed protection, joint health and quality of life in everyday clinical practice," said Lydia Abad-Franch, MD, Chief Medical Officer at Sobi. "The breadth of data being presented at ISTH 2026 reflects our continued commitment to advancing care through both clinical development and real-world evidence generation to help improve outcomes for people living with haemophilia."

About ALTUVOCT®

ALTUVOCT (efanesoctocog alfa) [Antihemophilic Factor (Recombinant), Fc-VWF-XTEN Fusion Protein] (formerly BIVV001) is the first high-sustained FVIII replacement therapy with the potential to deliver near-normal factor activity levels for a significant part of the week, improving bleed protection in a once-weekly dose for people with haemophilia A. Efanesoctocog alfa builds on the established Fc fusion technology by innovatively adding a region of von Willebrand factor and XTEN® polypeptides to extend its time in circulation. It is the only therapy that has been shown to break through the von Willebrand factor ceiling, which imposes a half-life limitation on current factor VIII therapies. The European Commission granted Orphan Drug designation in June 2019. It is approved and marketed as ALTUVOCT™ by Sobi in Europe, Israel, Saudi Arabia, United Arab Emirates and Kuwait. It is approved and marketed as ALTUVIIIO™ [Antihemophilic Factor (Recombinant), Fc-VWF-XTEN Fusion Protein-ehtl] by Sanofi in the United States, Japan and Taiwan.

About Elocta®/Eloctate®

Elocta®/Eloctate® (efmoroctocog alfa) is a recombinant clotting factor therapy developed for haemophilia A using Fc fusion technology to prolong circulation in the body. It is engineered by fusing factor VIII to the Fc portion of immunoglobulin G subclass 1, or IgG1 (a protein commonly found in the body), enabling Elocta to use a naturally occurring pathway to extend the time the therapy remains in the body (half-life). Elocta is manufactured using a human cell line in an environment free of animal and human additives. Elocta is approved and marketed by Sobi for the treatment of haemophilia A in the EU, the UK, Iceland, Kuwait, Liechtenstein, Norway, Bosnia & Herzegovina, Israel, North Macedonia, Oman, Serbia, Tunisia, Turkey, Saudi Arabia and Switzerland. It is approved and marketed as Eloctate® (Antihemophilic Factor [Recombinant], Fc Fusion Protein) by Sanofi in the United States, Canada Japan, Australia, New Zealand and other countries, where Sanofi has the marketing rights.

About Alprolix®

Alprolix® (eftrenonacog alfa) is a recombinant clotting factor therapy developed for haemophilia B using Fc fusion technology to prolong circulation in the body. It is engineered by fusing factor IX to the Fc portion of immunoglobulin G subclass 1, or IgG1 (a protein commonly found in the body), enabling Alprolix to use a naturally occurring pathway to extend the time the therapy remains in the body (half-life). Alprolix is manufactured using a human cell line in an environment free of animal and human additives. Alprolix is approved and marketed by Sobi for the treatment of haemophilia B in the EU, the UK, Iceland, Kuwait, Liechtenstein, Norway, Saudi Arabia and Switzerland. It is also approved in the United States, Canada, Japan, Australia, New Zealand and other countries where Sanofi has the marketing rights.

About the Sanofi and Sobi collaboration

Sobi and Sanofi collaborate on the development and commercialisation of Alprolix® and Elocta®/Eloctate®. The companies also collaborate on the development and commercialisation of ALTUVOCT® (efanesoctocog alfa), or ALTUVIIIO™ in the US. Sobi has final development and commercialisation rights in the Sobi territory (essentially Europe, North Africa, Russia, and most Middle Eastern markets). Sanofi has final development and commercialisation rights in North America and all other regions in the world excluding the Sobi territory.

Sobi®

Sobi is a global biopharma company unlocking the potential of breakthrough innovations, transforming everyday life for people living with rare diseases. Sobi has approximately 2,000 employees across Europe, North America, the Middle East, Asia and Australia. In 2025, revenue amounted to SEK 28 billion. Sobi's share (STO: SOBI) is listed on Nasdaq Stockholm. More about Sobi at sobi.com and LinkedIn.

Contacts
For details on how to contact the Sobi Investor Relations Team, please click here. For Sobi Media contacts, click here.

Visiting address
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+46 8 697 20 00
info@sobi.com

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