09:15 AM EDT, 04/23/2026 (MT Newswires) -- Health care stocks were declining premarket Thursday, with the State Street Health Care Select Sector SPDR ETF ( XLV ) down 0.3% and the iShares Biotechnology ETF (IBB) 0.7% lower.

Thermo Fisher Scientific ( TMO ) stock was down more than 9% even after the company posted higher fiscal Q1 adjusted earnings and revenue.

Sanofi ( SNY ) shares were up more than 3% after the company reported higher Q1 adjusted earnings and net sales.

West Pharmaceutical Services ( WST ) stock was up more than 16% after the company reported higher Q1 non-GAAP earnings and net sales. West Pharmaceutical Services ( WST ) also issued Q2 outlook above analysts' expectations and raised its 2026 guidance.