09:14 AM EDT, 09/09/2025 (MT Newswires) -- Health care stocks were flat to higher premarket Tuesday, with the iShares Biotechnology ETF (IBB) inactive and the Health Care Select Sector SPDR Fund ( XLV ) advancing by 0.2%.

UnitedHealth Group ( UNH ) shares were up more than 4% after the company said interim data suggest that about 78% of its membership is in 4-star or higher plans, consistent with expectations and past performance.

PACS Group ( PACS ) shares were down more than 15% after the company said Chief Financial Officer Derick Apt resigned Sept. 2. An investigation found that Apt accepted "a series of high-value items" from individuals associated with entities with which the company does business, thereby breaching company policies, PACS said.

Ionis Pharmaceuticals ( IONS ) stock was up more than 2% after the company said the US Food and Drug Administration has granted breakthrough therapy designation to ION582 to treat patients with Angelman syndrome, a rare neurological disease.