Products
- Cole Motor Car Company
- Coliseum Company of Chicago (Signed By Charles F. Gunther)
- Collateralized Mortgage Securities Corporation (Contributed to 2007/2008 Financial Crisis)
- Collier Motor Truck Company
- Collins & Aikman Corporation
- Collins Radio Company
- Collins Radio Company
- Colonial Motion PIcture Corporation
- Colonial Theatre Co. (Coliseum Theatre, San Francisco)
- Colorado and Southern Railway Company
- Colorado Milling and Elevator Company (Signed by J. K. Mullen)
- Colorado Springs and Cripple Creek Central Railway Company
- Colorado Telephone Company
- Colorado, Wyoming and Eastern Railway Company
- Colorado, Wyoming and Eastern Railway Company
- Coloritype Company
- Colt's Manufacturing Company
- Colt's Patent Fire Arms Manufacturing Company
- Colt's Patent Fire Arms Manufacturing Company
- Columbia & Puget Sound Railroad Company
- Columbia & Puget Sound Railroad Company
- Columbia Broadcasting System, Inc. (CBS)
- Columbia Broadcasting System, Inc. (CBS)
- Columbia Broadcasting System, Inc. (CBS)
- Columbia Gas System, Inc.
- Columbia Graphophone Manufacturing Company
- Columbia Pictures Corporation
- Columbia Pictures Industries, Inc.
- Columbia Steel Corporation
- Columbia Technical Corporation
- Columbia Trust Company
- Columbian-Sterling Publishing Company
- Columbus & Indianapolis Central Railway Company
- Columbus & Maysville Railway Company
- Columbus & Xenia Rail Road Company
- Columbus & Xenia Rail Road Company
- Columbus and Southern Ohio Electric Company
- Columbus and Xenia Railroad Company
- Columbus London and Springfield Railway Company
- Columbus Piqua & Indiana Rail Road Company
- Columbus Southern Railway Company
- Columbus Southern Railway Company
- Columbus, Chicago and Indiana Central Railway Company
- Columbus, Marion and Bucyrus Railway Company
- Columbus, Marion and Bucyrus Railway Company
- Commonwealth & Southern Corporation
- Commonwealth & Southern Corporation
- Commonwealth Avenue Street Railway Co.
- Commonwealth Bank (Detroit)
- Commonwealth Oil Company, Inc.
- Commonwealth Telephone Company
- Commonwealth Telephone Company
- Communications Satellite Corporation
- Community Baseball Club of Central New York, Inc. (Syracuse Chiefs)
- Community Savings Bank of Rochester
- Composite Type Bar Company
- Computer Telephone Company of Chicago, Inc.
- Comstock Tunnel and Drainage Company
- Comstock Tunnel Company (Signed by Theodore Sutro)
- ConAgra, Inc.
- Concord and Claremont Railroad
- Concord and Montreal Railroad Company
- Coney Island and Gravesend Railway Company
- Coney Island and Gravesend Railway Company
- Connecticut Mills Company
- Connecticut National Bank of Bridgeport
- Connecticut Railway and Lighting Company
- Connecticut Railway and Lighting Company
- Connecticut Telephone Company (Signed by Marshall Jewell)
- Connecting Railway Company
- Consolidated Arizona Smelting Company
- Consolidated Automatic Merchandising Corporation
- Consolidated Cigar Corporation
- Consolidated Cigar Corporation
- Consolidated Cigar Corporation
- Consolidated Coppermines Corporation
- Consolidated Edison Company of New York, Inc.
- Consolidated Edison Company of New York, Inc.
- Consolidated Edison Company of New York, Inc.
- Consolidated Edison Company of New York, Inc.
- Consolidated Engine-Stop Company
- Consolidated Gas Company of New York
- Consolidated Gas Company of the City of Pittsburgh
- Consolidated Gas Company of the City of Pittsburgh
- Consolidated Lake Superior Company
- Consolidated Oil Corporation
- Consolidated Oil Corporation
- Consolidated Railroads of Cuba
- Consolidated Railway Company
- Consolidated Railway Company
- Consolidated Railway Company
- Consolidated Railway Company
- Consolidated Steamship Lines
- Consolidated Sulphur Company
- Consolidated Telephone Companies of Pennsylvania
- Consolidated Textiles Corporation (Fruit of the Loom)
- Consolidated Traction Company
- Consolidated Water Company of Utica, N. Y.
- Consolidated Water Company of Utica, N. Y.
- Consolidation Coal Company