The FDA has approved denosumab biosimilars Conexxence® and Bomyntra® (Fresenius Kabi) and Stoboclo® and Osenvelt® (Celltrion) as interchangeable with Amgen’s Prolia® and Xgeva®, respectively, for all approved indications, effective as of 29 October 2025.
Fresenius Kabi launched Conexxence® and Bomyntra® in early July 2025, following a global settlement agreement with Amgen, resulting in the dismissal of US BPCIA litigation commenced by Amgen in October 2024. Amgen and Celltrion also settled their BPCIA litigation in January 2025, with Celltrion launching Stoboclo® and Osenvelt® in July 2025.
There are seven pairs of denosumab biosimilars approved in the US: Sandoz’s Jubbonti® and Wyost® (approved March 2024, launched June 2025), Samsung Bioepis’ Obodence™ and Xbryk™ (approved February 2025, not yet launched), Celltrion’s Stoboclo® and Osenvelt® (approved March 2025, launched July 2025), Fresenius Kabi’s Conexxence® and Bomyntra® (approved March 2025, launched July 2025), Shanghai Henlius/Organon’s Bildyos® and Bilprevda® (approved September 2025, not yet launched), Biocon’s Bosaya™ and Aukelso™ (approved September 2025, launched October 2025), and Richter/Hikma’s Enoby™and Xtrenbo™ (approved September 2025, not yet launched).