Chipmaker Allegro Microsystems calls Onsemi's $6.9B takeover bid as “inadequate”; Allegro had a ~$4.9B market cap as of March 5, while Onsemi's stood at $19.6B Bloomberg : Bloomberg 2025-03-06 Allegro, Bloomberg, Chipmaker Allegro Microsystems, Onsemi, Onsemi, ~$4.9B