- American Butter Co. Station, Vinita, Okla. ; Shirley Hemphill, Hitchland, Okla. ; S. F. Ternens, Geary, Okla.1
- American Fish Co.1
- American Fruit Growers (Inc.)1
- American Fruit Growers, Inc.1
- American Hog Raisers' Association, Des Moines, Iowa1
- Anderson Produce Co.1
- Angeline Corp.1
- Arcady Farms Milling Co.1
- Arctic Dairy Products Co.1
- Arkansas City Produce Co.1
- Armour & Co.1
- Armour & Co., a corporation trading as the Armour Creamery Co.1
- Armour Fertilizer Co.1
- Associated Growers of British Columbia, Ltd.1
- Atlas Cereal Co.1
- Austin Canning Co.2
- Auton Hromas, Waukomis, Okla. ; J. A. Robinson, Bruceville, Tex. ; Otto Liese, Georgetown, Tex. ; and Ed Lee, Altus, Ark.1
- Autotoxine Co.1
- B. E. Keith1
- B. F. Allen Co., New York, N. Y., Chicago, Ill., and Boston, Mass.1