Pfizer Inc. today announced that it has filed a lawsuit against Metsera, Inc., its Board of Directors, and Novo Nordisk, S.A. in the Delaware Court of Chancery. The lawsuit asserts claims for breach of contract, breach of fiduciary duty, and tortious interference in contract arising from Metsera’s breach of its obligations under the merger agreement between Pfizer and Metsera.

Pfizer Inc. (NYSE: PFE) today announced the U.S. Federal Trade Commission has granted early termination of the waiting period under the Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended (the “HSR Act”), with respect to Pfizer’s pending acquisition of Metsera (NASDAQ: MTSR).

The termination of the waiting period under the HSR Act satisfies the regulatory review requirements under the previously announced proposed acquisition of Metsera, which was set to expire on November 7.

Pfizer Inc. (NYSE: PFE) is aware of the reckless and unprecedented proposal by Novo Nordisk A/S (NYSE: NVO) to acquire Metsera, Inc. (NASDAQ: MTSR). It is an attempt by a company with a dominant market position to suppress competition in violation of law by taking over an emerging American challenger. It is also structured in a way to circumvent antitrust laws and carries substantial regulatory and executional risk. The proposal is illusory and cannot qualify as a superior proposal under Pfizer’s agreement with Metsera, and Pfizer is prepared to pursue all legal avenues to enforce its rights under its agreement.

Bayer announced that the U.S. Food and Drug Administration (FDA) has approved elinzanetant as the first dual neurokinin (NK) targeted therapy(1), neurokinin 1 (NK1) and neurokinin 3 (NK3) receptor antagonist, under the brand name Lynkuet™ for the treatment of moderate to severe vasomotor symptoms (VMS, also known as hot flashes) due to menopause. Inhibition of Substance P and Neurokinin B through antagonism of NK1 and NK3 receptor signaling on kisspeptin/neurokinin B/dynorphin (KNDy) neurons with elinzanetant can modulate neuronal activity in the thermoregulation associated with hot flashes.

Novartis announced that Rhapsido® (remibrutinib) received US Food and Drug Administration (FDA) approval as an oral treatment for adult patients with chronic spontaneous urticaria (CSU) who remain symptomatic despite H1 antihistamine treatment. Rhapsido is a pill taken twice daily and does not require injections or lab monitoring. It is the first FDA-approved Bruton’s tyrosine kinase inhibitor (BTKi) for CSU.

Pfizer Inc. (NYSE: PFE) and Metsera, Inc. (NASDAQ: MTSR) announced the companies have entered into a definitive agreement under which Pfizer will acquire Metsera, a clinical-stage biopharmaceutical company accelerating the next generation of medicines for obesity and cardiometabolic diseases. The acquisition brings deep expertise and a portfolio of differentiated oral and injectable incretin, non-incretin and combination therapy candidates with potential best-in-class efficacy and safety profiles.

Roche (SIX: RO, ROG; OTCQX: RHHBY) announced today that it has entered into a definitive merger agreement to acquire 89bio, Inc. (Nasdaq: ETNB), a publicly listed clinical-stage biopharmaceutical company pioneering the development of innovative therapies for the treatment of liver and cardiometabolic diseases. 89bio’s pegozafermin is a FGF21 analog currently in late-stage development for MASH in moderate and severe fibrotic patients (F2 and F3 stages) as well as cirrhotic patients (F4 stage).