- William Young
- William Young
- William Yu
- William Zhang
- William Zimmern
- William Zorn
- Williams & Associates Insurance Acquired By Seeman Holtz Property & Casualty
- Williams & Co International Realty Acquired By JP Associates & REALTORS
- Williams & Company Consulting, Inc.
- Williams & Frost Specialty Group Acquired By FTK Construction Services
- Williams & Gallagher Mergers and Acquisitions
- Williams & Garcia Acquired By Data Blue
- Williams & Williams Marketing Services Acquired By Mortgage Specialists International
- Williams & Williams Acquired By AssuredPartners
- Williams Advanced Engineering Acquisitions
- Williams Aerospace and Manufacturing Acquisitions
- Williams Capital Advisors LLC
- Williams Commerce Acquisitions
- Williams Controls Acquired By Curtiss-Wright
- Williams Cos. - Canadian Assets Acquired By Williams Partners
- Williams Cos. - Gulf Coast Natural Gas Liquids Pipeline Systems Acquired By Easton Energy
- Williams Data Management Acquisitions
- Williams Distributing Acquired By Daikin North America
- Williams Electric Acquired By Parsons
- Williams Electric Utility Services Acquired By United Utility Services
- Williams Energy Group Acquired By Superior Plus
- Williams Equipment & Supply Acquired By Construction Supply Group
- Williams Grand Prix Holdings Acquisitions
- Williams Hybrid Power Acquired By GKN
- Williams Industrial Services Group Acquisitions
- Williams Industries Acquisitions
- Williams Insurance Agency Acquired By Arthur J. Gallagher
- Williams Insurance Service Acquired By Inszone Insurance Services
- Williams Machine & Tool Acquired By Energy Manufacturing
- Williams Medical Holdings Acquired By DCC
- Williams Medical Supplies Acquired By DCC
- Williams Mullen
- Williams Of Swansea Acquired By Perkins Group Services
- Williams Panhandle Propane Acquired By Ferrellgas Partners
- Williams Partners Acquisitions
