Products
- West Chester and Philadelphia Rail Road Company
- West Coast Jockey Club (Tampa Bay Downs)
- West Coast Jockey Club (Tampa Bay Downs)
- West End Street Railway Company
- West End Traction Company
- West Indies Sugar Corporation
- West Jersey and Seashore Railroad Company
- West Jersey Ferry Company
- West Palm Beach, City of
- West Penn Traction & Water Power Company
- West Philadelphia Passenger Railway Company
- West Philadelphia Passenger Railway Company
- West Philadelphia Rail Road Company (1838!)
- West Shore and Ontario Terminal Company
- West Shore Creamery Company
- West Shore Railroad Company
- West Shore Railroad Company
- West Virginia Pulp and Paper Company
- West Virginia Pulp and Paper Company
- West Virginia Southern Railway
- Westchester Putnam Trolley and Land Improvement Company
- Westcolang Lake and Delaware River Park
- Western Air Lines, Inc.
- Western Car Company
- Western Greyhound Racing, Inc.
- Western Illinois Telephone Company
- Western Illinois Telephone Company
- Western Illinois Telephone Company
- Western Maryland Rail Road Company
- Western Maryland Railroad Company
- Western Maryland Railroad Company
- Western Maryland Railroad Company (Issued to John D. Rockefeller)
- Western Maryland Railway Company
- Western Maryland Railway Company
- Western Maryland Railway Company
- Western Maryland Railway Company
- Western New York and Pennsylvania Railway Company
- Western New York and Pennsylvania Railway Company
- Western Pacific Railroad Company
- Western Pacific Railroad Company
- Western Pacific Railroad Company
- Western Power Company
- Western Rail Road Company of Alabama
- Western Railroad Corporation (Massachusetts)
- Western Railway Construction Company
- Western Railway of Alabama
- Western Transit Company
- Western Transport Company
- Western Union Computer Utilities, Inc.
- Western Union Corporation
- Western Union International, Inc.
- Western Union Mining Company
- Western Union Telegraph Company
- Western Union Telegraph Company
- Western Vermont Railroad Company
- Western Vermont Railroad Company
- Westinghouse Air Brake Company
- Westinghouse Air Brake Company
- Westinghouse Air Brake Company
- Westmoreland Grocery Company
- Westvaco Corporation
- Wheeled Coach Industries, Inc. (Ambulances)
- Wheeling and Lake Erie Railway Company
- Wheeling Bridge and Terminal Railway Company
- Whippany River Railroad Company
- Whippany River Railroad Company
- White Caps Extension Mines Company
- White Electric Traction Company
- White Motor Company
- White Motor Corporation
- White Stores, Inc.
- Wichita Falls and Northwestern Railway Company
- Wichita River Oil Corporation
- Wicks Tire & Rubber Products Co. (Seattle, Washington)
- Wiggins Ferry Company
- Wilbur Mining Company, Limited
- Wildwood and Delaware Bay Short Line Railroad Company
- Wilkes-Barre and Eastern Railroad Company
- Wilkes-Barre and Eastern Railroad Company
- Wilkes-Barre and Eastern Railroad Company
- Williams Companies
- Williams Manufacturing Company
- Willys Corporation (Jeep)
- Willys-Overland Company (Jeep)
- Willys-Overland Company (Jeep)
- Wilmington & Chester Traction Company
- Wilmington and Northern Rail Road Company
- Wilmington and Northern Railroad Company (Signed by Henry A. duPont)
- Wilmington and Northern Railroad Company (Signed by Henry A. duPont)
- Wilmington and Philadelphia Traction Company
- Wilshire Oil Company of Texas
- Wilson Line, Incorporated
- Wilson Mechanical Instrument Co., Inc.
- Wilson Oil Company
- Wilson-Sinclair Co.
- Windsor Film Service Limited
- Wine-Ola Co. Inc.
- Wisconsin and Colorado Silver Mining Co.
- Wisconsin Edison Company, Incorporated
- Wisconsin Telephone Company