- C. D. Kenny Co.1
- Calvert Super Market1
- Cape King Fisheries, Inc.1
- Capital Egg Products, Inc.1
- Capital Food Co., a partnership, Washington, D. C., and Dominic F. Antonelli and Enrico Torino, partners1
- Carl's1
- Caroline Poultry Farms, Inc.1
- Chandler Laboratories1
- Charles C. Haskell & Co., Inc.1
- Charles G. Summers, Jr., Inc.1
- Cherry Specialty Co.1
- Chesapeake Baking Co.1
- Chinese Lantern Restaurant Corporation1
- Chr. Bjelland & Co., Inc.1
- Chr. Heurich Brewing Co.1
- Citrus Juice Co.1
- Clara Val Packing Co.1
- Clover Dairy Corporation1
- Coastal Seafood Co., Inc.1
- Coburn Farm Products Corp.1