By Stephen Nakrosis

Sellas Life Sciences Group Inc. shares rose premarket Wednesday, after the company said it saw promising updated clinical data and initial immunobiological data from an ovarian cancer treatment.

The biopharmaceutical company said updated data from its ongoing Phase 1/2 study of Galinpepimut-S combined with Keytruda to treat WT1+ advanced ovarian cancer showed all patients alive and 45.5% continuing investigational therapy as of the latest follow-up.

At 9:14 a.m. ET, Sellas shares were trading 14.8% higher at $15.01. Volume at the time topped 443,000 shares.

The stock closed Tuesday down 4.8% at $13.07 a share.

Write to Stephen Nakrosis at stephen.nakrosis@wsj.com

(END) Dow Jones Newswires

06-30-21 0937ET