Onsemi rises after $6 billion share buyback plan announced
Updates ** Chipmaker Onsemi's ON.O shares rise 2.9% to $46.91 ** Co announces $6 billion share repurchase authorization ** New share repurchase program launches in January 2026, spans three years ** Up to last close, stock has fallen 27.7% this year (Reporting by Anhata Rooprai in Bengaluru) ((Anhata.Rooprai@thomsonreuters.com))