- William Polk, Jr.
- William Pommerening
- William Potter
- William Pucillo
- William Pulte
- William Quicksilver
- William Quinn
- William R Carey Acquired By HUB International
- William R. Lemmons Jr.
- William R. Seide Agency Acquired By Choice Financial Group
- William Rahm
- William Ransom & Son Acquisitions
- William Rast Acquired By WHP Global
- William Reed Business Media Acquisitions
- William Reichert
- William Reid
- William Reilly
- William Rhodes
- William Richardson
- William Richter
- William Ritchie
- William Roche
- William Rodgers Foods Acquired By Campbell Soup
- William Rogers
- William Rohrer
- William Rose
- William Rosenberg
- William Rosener
- William Ross
- William Rowley
- William Royer
- William Russell
- William Russell
- William Rust
- William Ryan
- William Sale
- William Salisbury
- William Santaniello
- William Savitt
- William Schaar
