Royalty Pharma has signed a deal to pay Biogen $250m to support the development of its late-stage experimental lupus medication litifilimab.
In return, Royalty Pharma will receive undisclosed milestone payments if the drug meets certain regulatory goals, as well as mid-single-digit royalties on worldwide sales. Payments up to $250m to Biogen will be spread over six quarters, Royalty said in the announcement.
Litifilimab, an anti-BDCA2 antibody, is being evaluated in Phase III trials for both systemic lupus erythematosus (SLE) and cutaneous lupus erythematosus (CLE). Biogen will use the funds to continue development, with trial results expected in 2026 and 2027.
The market for SLE remains largely dominated by generic drugs, with few targeted biologics approved by the US Food and Drug Administration (FDA) in the last 50 years. These include GSK’s Benlysta (belimumab) and AstraZeneca’s Saphnelo (anifrolumab). The market for CLE, however, has seen even less innovation. CLE is a form of lupus that primarily affects the skin, leading to inflammation, rashes, and lesions, though it can sometimes be linked to SLE.
Litifilimab showed promising results in the Phase II LILAC study (NCT02847598), where it significantly reduced skin disease activity in people with CLE compared to placebo as measured by the primary endpoint. If approved, the drug could generate up to $750m in global sales by 2030, according to GlobalData’s Pharma Intelligence Center.
GlobalData is the parent company of Pharmaceutical Technology.
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By GlobalDataThis agreement expands Royalty’s portfolio, adding to a series of deals that the company has struck over recent years. This includes transactions with BridgeBio Pharma, ImmuNext, Cytokinetics and Agios Pharmaceuticals. Royalty’s deal with ImmuNext provided it with access to royalties and milestones on a drug to treat multiple sclerosis (MS) under development with Sanofi.
Royalty also holds rights on Biogen’s MS medication Tysabri (natalizumab) and spinal muscular atrophy drug Spinraza (nusinersen), acquired through agreements with Ionis and Perrigo.
The deal coincides with Biogen’s latest earnings report, in which the company exceeded Q4 2024 expectations due to cost-cutting measures and new product launches, including its Alzheimer’s drug Leqembi (lecanemab). However, Biogen expects reduced profits this year, citing currency fluctuations and competition in the MS market. The biotech also announced the discontinuation of four drug development programmes: a Phase II asset for diabetic peripheral neuropathic pain and three Phase I neurodegenerative disease candidates.
Biogen hit the headlines last month when Sage Therapeutics rejected its $469m takeover offer, with the company’s board of directors unanimously concluding that the bid “significantly undervalues” the company. Made earlier this year, the proposal offered $7.22 per share, a 30% premium on Sage’s share price at the time. Sage responded by suing Biogen to “enforce a standstill agreement” between the two companies. Biogen currently co-markets Sage’s postpartum depression drug Zurzuvae (zuranolone).
