Biogen Inc. is doubling down on novel therapies for rare diseases, announcing an acquisition of Human Immunology Biosciences that could be valued at up to $1.8 billion. The deal gives Biogen full rights to HI-Bio’s lead drug candidate felzartamab, which is being studied for several chronic kidney conditions with large unmet medical needs.
The transaction reflects Biogen’s strategic shift under CEO Christopher Viehbacher to diversify beyond its core neuroscience franchise. Just months after the $6.5 billion buyout of kidney disease specialist Reata Pharmaceuticals, Biogen is opening its checkbook again to beef up its pipeline of potential rare disease medicines.
HI-Bio’s felzartamab has completed mid-stage trials for two types of kidney disorders – primary membranous nephropathy and transplant glomerulopathy where the immune system attacks a transplanted organ. Importantly, it is also being evaluated for IgA nephropathy, a leading cause of kidney failure with no approved treatments available.
For Biogen, the deal provides another shot on goal as it navigates an uncertain period. While its newly-launched Alzheimer’s drug Leqembi has shown promise, the company was forced to abandon its previous Alzheimer’s treatment Aduhelm after years of controversy. Biogen’s older multiple sclerosis franchises are facing rising competitive threats as well.
The HI-Bio acquisition gives Biogen added pipeline diversification into nephrology and autoimmune diseases. Felzartamab has a unique approach, as it is an anti-FcRn antibody that targets pathogenic IgG antibodies which can damage kidneys and other organs.
If felzartamab can demonstrate positive efficacy and safety in broader Phase 3 testing, it could eventually have multi-billion dollar peak sales potential across its targeted kidney indications according to analyst forecasts. However, there is no guarantee of clinical or regulatory success.
From a financial perspective, Biogen is paying $1.15 billion upfront for private HI-Bio, along with contingent value rights worth up to $650 million if certain development and commercial milestones are achieved. This is relatively modest compared to Biogen’s $6.5 billion acquisition of Reata announced in February.
The HI-Bio deal continues Biogen’s aim to revamp its R&D pipeline through a series of bold acquisitions and partnerships under Viehbacher. The company is betting that assembling a portfolio of high-risk, high-reward clinical candidates for diseases like Alzheimer’s and kidney disorders will ultimately pay off.
For the healthcare sector and public markets, Biogen’s aggressive business development approach is emblematic of the ongoing consolidation wave. With rising costs of drug development and payer pricing pressures, large biopharma companies are increasingly looking to acquisitions of smaller, more focused biotechs to source external innovation.
While Biogen’s M&A strategy carries substantial financial risk, the HI-Bio deal gives it a promising asset that could reshape treatment for serious kidney diseases if it can overcome the high hurdle of clinical success. For healthcare investors, absorbing Biogen’s evolving pipeline story will be crucial in evaluating the company’s future growth prospects.
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