— Gilead Adds Seladelpar to Portfolio, a PPARδ Agonist for the Treatment of Primary Biliary Cholangitis (PBC) with FDA Priority Review and Anticipated U.S. Approval in Third Quarter of 2024 —

— Seladelpar Phase 3 Data Demonstrates a Best-in-Disease Profile for Second-Line PBC —

— Acquisition Expands Gilead’s Long-Standing Commitment to Patients with Liver Diseases —

FOSTER CITY, CA & NEWARK, CA, USA I February 12, 2024 I Gilead Sciences, Inc. (Nasdaq: GILD) and CymaBay Therapeutics, Inc. (Nasdaq: CBAY) announced today a definitive agreement under which Gilead will acquire CymaBay for $32.50 per share in cash or a total equity value of $4.3 billion. The addition of CymaBay’s investigational lead product candidate, seladelpar for the treatment of primary biliary cholangitis (PBC) including pruritus, complements Gilead’s existing liver portfolio and aligns with its long-standing commitment to bringing transformational medicines to patients.

“We are looking forward to advancing seladelpar by leveraging Gilead’s long-standing expertise in treating and curing liver diseases,” said Daniel O’Day, Chairman and Chief Executive Officer, Gilead Sciences. “Building on the strong research and development work by the CymaBay team to date, we have the potential to address a significant unmet need for people living with PBC and expand on our existing broad range of transformational therapies.”

PBC is a rare, chronic, cholestatic liver disease mainly affecting women (1 in 1,000 women over the age of 40 or about 130,000 total people in the U.S.) that impairs liver function and quality of life. The most common early symptoms of PBC are pruritus (itching) and fatigue, which can be debilitating for some patients. Progression of PBC is associated with an increased risk of liver-related mortality.

Seladelpar is an investigational, oral, selective peroxisome proliferator-activated receptor delta (PPARδ) agonist, shown to regulate critical metabolic and liver disease pathways. The United States Food and Drug Administration (FDA) has completed its filing review and accepted a New Drug Application for seladelpar and granted priority review with a Prescription Drug User Fee Act target action date of August 14, 2024.

Seladelpar received FDA Breakthrough Therapy Designation for use in the treatment of PBC including pruritus in patients without cirrhosis or with compensated cirrhosis and PRIME status (EMA), as well as Orphan Drug Designation in the U.S. and Europe for the treatment of patients with PBC.

In the pivotal Phase 3 RESPONSE trial, seladelpar achieved statistical significance over placebo across primary composite endpoints of biochemical response (61.7% for patients on seladelpar vs 20.0% for placebo), normalization of alkaline phosphatase at 12 months (25.0% for patients on seladelpar vs 0.0% for placebo) and statistically significant improvement in pruritus at six months among people living with moderate-to-severe itch that was sustained through 12 months.

“Today’s agreement with Gilead is the culmination of years of focus and determination at CymaBay to advance seladelpar and bring new hope to people living with PBC and their families,” said Sujal Shah, President, and CEO at CymaBay Therapeutics. “Now that seladelpar has achieved priority review with the FDA, we are excited that Gilead, with its long-standing commitment to patients with liver disease, can apply its regulatory and commercial expertise to bring seladelpar as quickly as possible to people with PBC.”

Terms of the Transaction

The transaction was approved by both the Gilead and CymaBay Boards of Directors and is anticipated to close during the first quarter of 2024, subject to regulatory approvals and other customary closing conditions.

Under the terms of the merger agreement entered into in connection with the transaction, a wholly-owned subsidiary of Gilead will promptly commence a tender offer to acquire all of the outstanding shares of CymaBay’s common stock at a price of $32.50 per share in cash, which offer price represents a 27 percent premium to CymaBay’s closing share price on February 9, 2024. Following successful completion of the tender offer, Gilead will acquire all remaining shares not tendered in the offer through a second step merger at the same price as in the tender offer. Upon FDA approval of seladelpar, the proposed transaction is expected to enhance Gilead’s revenue growth, and it is also expected that the transaction will be approximately neutral to earnings per share in 2025 and significantly accretive thereafter.

Consummation of the tender offer is subject to a minimum tender of at least a majority of then-outstanding CymaBay shares, the expiration or termination of the waiting period under the Hart-Scott-Rodino Antitrust Improvements Act and other customary conditions.

BofA Securities, Inc. and Guggenheim Securities, LLC are acting as financial advisors to Gilead. Centerview Partners LLC and Lazard are acting as financial advisors to CymaBay.

About Seladelpar

Seladelpar, an investigational treatment for people with PBC, is an oral, selective peroxisomeproliferator-activated receptor delta (PPARδ) agonist shown to regulate critical metabolic and liver disease pathways in indications with high unmet medical need. Preclinical and clinical data support its ability to regulate genes involved in bile acid synthesis, inflammation, fibrosis and lipid metabolism, storage, and transport.

About CymaBay Therapeutics

CymaBay Therapeutics, Inc. is a clinical-stage biopharmaceutical company focused on improving the lives of people with liver and other chronic diseases that have high unmet medical need. Our deep understanding of the underlying mechanisms of liver inflammation and fibrosis, and the unique targets that play a role in their progression, have helped us receive breakthrough therapy designation (FDA), PRIME status (EMA), and orphan drug status (U.S. and Europe) for seladelpar, a first-in-class investigational treatment for people with PBC. A new drug application for seladelpar was submitted to the FDA in December 2023. Our evidence-based decision-making and commitment to the highest quality standards reflect our relentless dedication to the people, families, and communities we serve. To learn more, visit www.cymabay.com and follow us on X (formerly Twitter) and LinkedIn.

About Gilead Sciences

Gilead Sciences, Inc. is a biopharmaceutical company that has pursued and achieved breakthroughs in medicine for more than three decades, with the goal of creating a healthier world for all people. The company is committed to advancing innovative medicines to prevent and treat life-threatening diseases, including HIV, viral hepatitis, COVID-19, and cancer. Gilead operates in more than 35 countries worldwide, with headquarters in Foster City, Calif.

SOURCE: Gilead Sciences