- Adam Roth Grocery Co.1
- Adolph Goldniark & Sons, Inc.1
- Agmel Corp1
- Agmel Corp.1
- Albert W. Anderson, Swing, Mo.1
- Alf Wilson, Hamburg, Ill.1
- Allaire Woodward & Co.1
- Allan Pfeiffer Chemical Co.1
- Allan-Pfeiffer Chemical Co., a corporation, St. Louis, Mo.1
- Allan-Pfeiffer Chemical Co., a corporation, of St. Louis, Mo.1
- Allen F. McCord, trading as the Dr. A. Coyle Medicine Co., St. Louis, Mo.1
- Allie Retzer1
- American Beverage Company, Incorporated2
- American Coffee Co1
- American Egg & Products Co., a corporation, St. Louis, Mo.1
- American Syrup & Preserving Co.1
- American White Cross Laboratory1
- Andrews Packing Co.1
- Anna Produce Co.1
- Annanburg Grain & Milling Co.1