Sector Update: Healthcare Stocks Mixed Premarket Monday

09:19 AM EDT, 10/26/2026 (MT Newswires) -- Healthcare stocks were mixed premarket Monday, with the State Street Health Care Select Sector SPDR ETF (XLV) 0.1% higher and the iShares Biotechnology ETF (IBB) down 0.2%. Surgery Partners (SGRY) has reached a definitive agreement to be acquired by HealthSpan Partners in an all-cash deal valued at an enterprise value of about $5.7 billion, the companies said Monday. Shares of Surgery Partners were up more than 23% pre-bell. Xencor (XNCR) shares were up more than 29% after the company said its experimental cancer drug XmAb819 demonstrated a 45.5% confirmed objective response rate in a phase 1 study of patients with advanced clear cell renal cell carcinoma. BioNTech (BNTX) and DualityBiologics' phase 3 trial of trastuzumab pamirtecan in metastatic breast cancer achieved its primary endpoint of demonstrating a statistically significant improvement in progression-free survival, but with severe and fatal events, the companies said. BioNTech stock was down more than 2% premarket.