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Approval Alert: FDA Approves Denosumab Biosimilars for Fourth Sponsor

Mar 26, 2025

On 26 March 2025, Fresenius Kabi announced that the US FDA approved its Biologics Licence Application (BLA) for Conexxence® and Bomyntra® (denosumab-bhnt), biosimilars to Amgen’s Prolia® and Xgeva® respectively, for all reference indications.  Fresenius is the fourth sponsor to have denosumab biosimilars approved in the US.

Under the terms of a settlement between Fresenius Kabi and Amgen, resulting in the dismissal of all claims and counterclaims in US BPCIA litigation commenced by Amgen in October 2024, Fresenius Kabi may launch its denosumab biosimilars in the US in “mid-2025”.

Fresenius Kabi has also confirmed that the global settlement permits European launch of its denosumab biosimilars “later in H2 of 2025”, subject to regulatory approvals.

There are three sponsors with denosumab biosimilars already approved in the US: Celltrion’s Stoboclo® and Osenvelt® (March 2025), Samsung Bioepis’ Ospomyv™ and Xbryk™ (February 2025), and Sandoz’s Wyost® and Jubbonti® (March 2024).  A number of denosumab biosimilar BLAs are currently under review by the FDA, including for: Alvotech/Dr Reddy’s (March 2025), Amneal/mAbxience (March 2025), Gedeon Richter/Hikma (December 2024), Organon/Shanghai Henlius (October 2024), and Teva (October 2024).  Accord/Intas have also submitted an aBLA for INTP23 (denosumab, date of submission unknown).