Pfizer Acquires ReViral Ltd.

AstraZeneca Acquires Icosavax

December 12, 2023

Biotechnology

AstraZeneca has entered into a definitive agreement to acquire Icosavax, a Seattle-based clinical-stage biopharmaceutical company, in a cash tender offer valuing the deal at approximately $0.8bn upfront and up to $1.1bn including contingent payments. The acquisition brings Icosavax's virus‑like particle (VLP) platform and Phase III‑ready combination RSV/hMPV vaccine candidate IVX‑A12 into AstraZeneca's Vaccines & Immune Therapies late‑stage pipeline to strengthen respiratory vaccine capabilities for older adults and vulnerable populations.

Sanofi to Acquire Vicebio for Up to $1.6 Billion

July 25, 2025

Biotechnology

Sanofi will acquire clinical-stage biopharmaceutical company Vicebio in a deal worth up to $1.6 billion, including $1.15 billion upfront and $450 million in milestone payments. Vicebio, created by Medicxi using the University of Queensland's Molecular Clamp technology, develops multivalent vaccines targeting respiratory viruses and recently advanced a bivalent RSV/hMPV candidate into Phase 1 trials.

Pfizer Acquires Arena Pharmaceuticals

December 13, 2021

Pharmaceuticals

Pfizer Inc. agreed to acquire clinical-stage Arena Pharmaceuticals for $100 per share in an all-cash transaction valued at approximately $6.7 billion, creating a wholly owned subsidiary. The acquisition brings Arena's development-stage portfolio — including etrasimod and cardiovascular assets — into Pfizer's Inflammation & Immunology pipeline to accelerate clinical development and expand therapeutic capabilities.

Revive Therapeutics Agrees to Acquire Psilocin Pharma Corp.

February 11, 2020

Pharmaceuticals

Revive Therapeutics Ltd. entered into a letter of intent to acquire all issued and outstanding securities of Psilocin Pharma Corp. for an aggregate purchase price of $2.75 million to be satisfied by issuing 55 million common shares of Revive (deemed $0.05/share). Revive deposited 10 million shares ($500,000) into escrow as a deposit; the closing is subject to due diligence and execution of a definitive share exchange agreement.

Pfizer Acquires Biohaven Pharmaceutical Holding Company Ltd.

October 3, 2022

Pharmaceuticals

Pfizer Inc. completed the acquisition of Biohaven Pharmaceutical Holding Company Ltd. for approximately $11.6 billion (at $148.50 per share), bringing the migraine therapy NURTEC ODT (rimegepant), the zavegepant NDA program, and a CGRP-focused pipeline into Pfizer's Internal Medicine portfolio. Prior to closing, Biohaven spun off its non-CGRP assets into a separate publicly traded company, Biohaven Ltd., which Pfizer received a small pro rata stake in.

Zevra Therapeutics Acquires Acer Therapeutics

November 20, 2023

Pharmaceuticals

Zevra Therapeutics completed the acquisition of Acer Therapeutics in a stock-and-contingent-value-rights transaction, bringing the FDA-approved product OLPRUVA and clinical-stage candidate EDSIVO into Zevra's portfolio and transitioning Zevra to a commercial-stage rare disease company. The deal included Zevra's purchase of Acer's senior secured debt and issuance of approximately 2.96 million shares plus CVRs (up to $76 million), and was followed by a registered direct offering to a healthcare-focused investment fund.