08:59 AM EDT, 09/29/2025 (MT Newswires) -- Health care stocks were steady premarket Monday, with the iShares Biotechnology ETF (IBB) inactive and the Health Care Select Sector SPDR Fund (XLV) up 0.1%.

Genmab ( GMAB ) has agreed to acquire biotechnology firm Merus (MRUS) in an all-cash deal worth about $8 billion, the companies said in a joint statement. Merus shares were up more than 37% and Genmab ( GMAB ) shares were down more than 2% premarket.