- A. B. Winkley Cheese Co.1
- A. Bunzen, Seattle, Wash.1
- A. L. Hall1
- Abraham & Straus, Inc.1
- Abram Archer and Thomas Buckley Archer, copartners trading as Archer Produce Co.1
- Acme Products Co., Inc.1
- Adelman & Gallupe1
- Albert W. Sisk & Son, Preston, Md.1
- Alberty Food Products, Inc.1
- Alex Fries Bro., Inc.1
- American Fig & Date Co.1
- American White Cross Laboratories1
- American White Cross Laboratory1
- Anaheim Canning Co.1
- Anedemin Chemical Co.1
- Angelo Glorioso, New Orleans, La.1
- Archie Berland, Rose Kotenberg, and David F Berland, copartners, trading as the Erie Laboratories, Cleveland, Ohio1
- Armour Creameries1
- Associated Pecan Co.1
- Atlas Extracts Corporation1