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Inhibrx Sells Lead Asset INBRX-101 to Sanofi for Up to $2.2 Billion

Health
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Biotechnology company Inhibrx announced today that it has entered into a definitive agreement to sell its lead therapeutic candidate, INBRX-101, to French pharmaceutical giant Sanofi in a deal valued at up to $2.2 billion.

INBRX-101 is a recombinant alpha-1 antitrypsin (AAT) therapy being developed for the treatment of alpha-1 antitrypsin deficiency (AATD), a rare genetic disorder that can cause severe lung and liver disease. Under the terms of the agreement, Sanofi will acquire Inhibrx through a merger in which Inhibrx shareholders will receive $30 per share in cash, a contingent value right (CVR) worth up to $5 per share, and one share in a new publicly traded company called Inhibrx Biosciences for every four shares of Inhibrx held.

Inhibrx Biosciences will retain all of Inhibrx’s pipeline assets and infrastructure outside of INBRX-101. This includes several early-stage therapeutic candidates such as INBRX-105 for solid tumors, INBRX-106 for hematologic malignancies, and INBRX-109 for conventional chondrosarcoma. The new company will receive $200 million in cash funding from Sanofi and begin trading publicly after the completion of the merger.

The total potential value of the upfront cash payment, CVR, and Inhibrx’s debt assumption implies an aggregate transaction value of approximately $2.2 billion. Inhibrx shareholders will also own 92% of the equity in the newly formed Inhibrx Biosciences, which will provide opportunities for future value creation.

The acquisition provides Sanofi with full rights to develop and commercialize INBRX-101 globally. The drug candidate is currently in a registrational Phase 2/3 trial evaluating its safety and efficacy in patients with AATD. Inhibrx believes INBRX-101 has multi-billion dollar peak sales potential if approved, which likely drove Sanofi’s interest in the asset.

Inhibrx’s innovative AAT therapy utilizes the company’s novel therapeutic protein engineering capabilities. INBRX-101 is designed to maintain the stability and activity of AAT, potentially enabling less frequent dosing than current AAT therapies. This next-generation approach could position INBRX-101 as a best-in-class treatment option for AATD.

The proposed transaction has been unanimously approved by the boards of directors of both companies and is expected to close in Q2 2024, subject to Inhibrx shareholder approval, regulatory clearances, and other customary closing conditions. Until then, it will be business as usual for Inhibrx as it continues developing its pipeline assets.

For Sanofi, the acquisition expands its portfolio in rare diseases while strengthening its capabilities in protein sciences and engineering. Adding INBRX-101 provides Sanofi with a promising late-stage candidate that can leverage its expertise and infrastructure in pulmonary diseases. Sanofi has been active on the deals front lately, including a recent $3.2 billion deal for Amunix Pharmaceuticals, as it refreshes its pipeline.

Meanwhile, the new Inhibrx Biosciences will emerge as an up-and-coming biotech with strong financial backing, a seasoned management team, and innovative technology platforms. The company will continue operating under the Inhibrx name and leadership. This strategic deal allows Inhibrx to unlock significant value from its lead program while retaining its other assets and resources to drive future growth.

The transaction is a win for both parties, providing Sanofi with a potential blockbuster drug and Inhibrx shareholders with an attractive return and ongoing upside through Inhibrx Biosciences. It demonstrates the broader trend of big pharma leveraging M&A to access innovative therapies from smaller biotech players. As Inhibrx’s programs advance, it will be interesting to see if Inhibrx Biosciences attracts buyout interest down the road. But for now, the company seems well-positioned to create value by advancing its earlier-stage pipeline.

Take a look at more emerging growth biotech companies by taking a look at Noble Capital Markets’ Senior Research Analyst Robert LeBoyer’s coverage universe.
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