GlaxoSmithKline Acquires Sierra Oncology for $1.9bn

GSK Acquires Elsie Biotechnologies for up to $50M

June 6, 2024

Biotechnology

GSK plc has completed the acquisition of Elsie Biotechnologies, a San Diego–based oligonucleotide-focused biotechnology company, for up to $50 million. The deal integrates Elsie's discovery, synthesis and delivery capabilities into GSK's oligonucleotide R&D platform to accelerate development of therapeutics for chronic hepatitis B, steatotic liver disease and other difficult-to-treat diseases.

Gilead Sciences Acquires Forty Seven for $4.9 Billion

March 2, 2020

Biotechnology

Gilead Sciences agreed to acquire clinical-stage immuno-oncology company Forty Seven for $95.50 per share in cash, valuing the deal at approximately $4.9 billion. The acquisition adds Forty Seven's lead investigational antibody magrolimab to Gilead's oncology pipeline and is expected to close in Q2 2020 subject to customary approvals.

GSK Acquires BELLUS Health

April 18, 2023

Biotechnology

GSK plc agreed to acquire Canada-based late-stage biopharmaceutical company BELLUS Health for US$14.75 per share, representing an approximate total equity value of US$2.0 billion. The acquisition gives GSK access to camlipixant, a Phase III P2X3 antagonist for refractory chronic cough, and is expected to close in Q3 2023 subject to approvals.

AbbVie to Acquire ImmunoGen for $10.1 Billion

November 30, 2023

Biotechnology

AbbVie has entered into a definitive agreement to acquire ImmunoGen for $31.26 per share in cash, valuing the company at approximately $10.1 billion. The deal gives AbbVie commercial rights to ELAHERE (mirvetuximab soravtansine-gynx) and ImmunoGen's ADC pipeline, expanding AbbVie's oncology capabilities; the transaction is expected to close in mid-2024 subject to shareholder and regulatory approvals.

GSK Acquires Aiolos Bio for Up to $1.4 Billion

January 9, 2024

Biotechnology

GSK will acquire clinical-stage biopharmaceutical company Aiolos Bio for $1 billion upfront and up to $400 million in regulatory milestone payments, gaining access to AIO-001, a long-acting anti-TSLP monoclonal antibody advancing into Phase II for asthma. The deal expands GSK's respiratory biologics pipeline with a potential best-in-class therapy that may offer dosing as infrequently as every six months.

Gilead Sciences Acquires Immunomedics

September 13, 2020

Biotechnology

Gilead Sciences agreed to acquire Immunomedics for $88.00 per share in an all-cash transaction valuing Immunomedics at approximately $21 billion. The acquisition gives Gilead global rights (outside certain Asian territories) to Trodelvy, an FDA‑approved antibody‑drug conjugate for metastatic triple‑negative breast cancer, and accelerates Gilead’s expansion into oncology.