09:17 AM EST, 11/10/2025 (MT Newswires) -- Health care stocks were mixed premarket Monday, with the Health Care Select Sector SPDR Fund ( XLV ) down 0.2% and the iShares Biotechnology ETF (IBB) 0.5% higher.

Metsera ( MTSR ) announced late Friday an amended merger deal, under which Pfizer ( PFE ) will acquire Metsera ( MTSR ) for up to $86.25 per share. Metsera's ( MTSR ) board determined that the revised terms represent the "best transaction" for shareholders and that the deal proposed by Novo Nordisk ( NVO ) presents "unacceptably high legal and regulatory risks." Metsera ( MTSR ) shares were down more than 15% pre-bell.

Immunovant ( IMVT ) shares were down more than 5% after the company reported a narrower fiscal Q2 net loss that still missed analysts' expectations.

Revvity ( RVTY ) stock was up more than 1% after the company said it has entered into a definitive agreement to acquire ACD/Labs.