Halozyme Acquires Antares Pharma for $960M

Amgen Completes Acquisition of Horizon Therapeutics plc

October 6, 2023

Biotechnology

Amgen completed the acquisition of Horizon Therapeutics plc for $116.50 per share in cash, valuing the transaction at approximately $27.8 billion. The deal expands Amgen's inflammation and rare-disease portfolio by adding Horizon's medicines (including TEPEZZA, KRYSTEXXA and UPLIZNA) and strengthens Amgen's biologics R&D, manufacturing and global commercial capabilities.

Merck Acquires Acceleron Pharma for $11.5 Billion

September 30, 2021

Biotechnology

Merck has entered into a definitive agreement to acquire Acceleron Pharma Inc. for $180 per share in cash, representing an approximate total equity value of $11.5 billion. The acquisition brings Acceleron's late-stage sotatercept program (for pulmonary arterial hypertension) and its REBLOZYL portfolio into Merck's cardiovascular pipeline, subject to tender offer completion and customary regulatory approvals.

Ipsen Acquires Epizyme

August 12, 2022

Biotechnology

Ipsen has completed the acquisition of Epizyme, Inc., acquiring all outstanding shares for $1.45 per share plus a $1.00 contingent value right and bringing Epizyme's approved oncology drug Tazverik and preclinical/clinical pipeline into Ipsen. The deal adds epigenetics-focused assets including the approved EZH2 inhibitor tazemetostat and the SETD2 inhibitor candidate EZM0414 to Ipsen's oncology portfolio and integrates Epizyme employees into Ipsen's organization.

Landsea Homes Acquires Antares Homes

January 9, 2024

Real Estate

Landsea Homes Corporation (Nasdaq: LSEA) has entered into a definitive agreement to acquire Antares Homes, a family-owned Dallas–Fort Worth homebuilder, for $232.2 million in cash (including repayment of anticipated debt). The acquisition expands Landsea's presence and scale in the Dallas/Fort Worth market and is expected to close in early February 2024, subject to customary closing conditions.

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.

BioMarin Acquires Inozyme Pharma

May 16, 2025

Biotechnology

BioMarin Pharmaceutical Inc. completed its acquisition of Inozyme Pharma, Inc. in an all-cash transaction valued at approximately $270 million ($4.00 per share). The deal adds Inozyme's late-stage enzyme replacement therapy INZ-701 for ENPP1 Deficiency to BioMarin's enzyme-therapy portfolio and is expected to accelerate development toward potential regulatory approval.