- Alexandria Packing Corp1
- Alhosan Chemical Co.2
- Allan-Pfeiffer Chemical Co.2
- Allan-Pfeiffer Chemical Co., St. Louis, Mo.1
- Allen Smith1
- Allied Drug Products Co.1
- Alonzo A. Knights & Son1
- Alvin A. Baumer, trading as Baumer Food Products Co.1
- Alvin A. Baumer, trading as Baumer's Food Products Co.3
- American Maid Flour Mills, Houston, Tex.1
- American Pickle & Canning Co., Wiggins, Miss.1
- Anaheim Canning Co.2
- Anchor Manufacturing Co., a corporation, New Orleans, La.1
- Angelo Glorioso2
- Angelo Glorioso, New Orleans, La.1
- Angelo Glorioso, trading under the name of the Mississippi Canning Co.1
- Angelo Spinato1
- Angelo St. Angelo and Joseph Grego, New Orleans, La.1
- Argyle Laboratories1
- Armour & Co.4