Gilead Sciences to Acquire Biotechnology Company Arcellx for $7.8 Billion

In The News
February 23, 2026

Ropes & Gray advised Gilead Sciences, Inc. on a definitive agreement to acquire Arcellx for $115 per share in cash at closing and one contingent value right of $5 per share, which represents an implied equity value of $7.8 billion payable at closing. Arcellx is a biotechnology company focused on delivering a new class of innovative immunotherapies for patients with cancer and other incurable diseases. The transaction was announced in a Feb. 23 press release.

Headquartered in Foster City, California, Gilead Sciences, Inc. is a biopharmaceutical company that has achieved breakthroughs in medicine for more than three decades and operates in more than 35 countries.

The team was led by mergers & acquisitions partner Emily Oldshue and counsel Nick Roper, and included executive compensation & employee benefits partner Renata Ferrari, IP transactions partner Megan Baca, tax partners Benjamin Rogers and David Saltzman, health care partner Christine Moundas, life sciences regulatory & compliance partner Josh Oyster, and real estate partner David Kaye.