- Art Stove Company1
- Artcourt Realty Co.1
- Arthold Realty Co.1
- Arthur & Bonnell1
- Arthur Hardgrove Co.12
- Artpaul Realty Co., Ltd.9
- Artsis, Jerome M.2
- Arwin Construction Corp.1
- Asher Dann and Sons3
- Asher Dann and Sons, Inc.3
- Ashley Apartments, Inc.2
- Ashwood Realty Corp.1
- Astor House9
- Astor, Vincent9
- Atchison Foundry Works1
- Atlanta Symphony Orchestra1
- Atlantic Hotel2
- Atlantic Towers, Inc.3
- Atlas and Son1
- Atlas, Sol G.8
- Aug. Steffen1
- Augustus Pollack1
- Austin Gardens Realty Corp.1
- Austin Management Corp.1
- Austin, Nichols & Co.7
- Automatic Vaudville Parlor1
- Avecrest Realty Co., Inc.1
- Avenue Associates6
- Avery, Snell & Co.1
- Avlon, John3
- Axelrod-Walker Corp.2
- B and F Realty Corp.1
- B. & J. Saylor1
- B. E. Block & Bros. Inc.1
- B. Fischer & Co., Inc.4
- B. Gloeckner & Co. Inc.1
- B. M. Ford & Co,1
- B. U. Young & Co.1
- B.G.R. Realty Corp.1
- B.H.M. Realty Corp.1
- Babor-Comeau and Co., Inc.1
- Bailey & Noyes1
- Bainbridge Towers, Inc.1
- Bainweeks Realty Corp.1
- Baker-Lewine Construction Co., Inc.2
- Baldwin the Clothier2
- Ball, Black & Co.1
- Ballets russes de Monte Carlo1
- Ballets russes du Col. W. de Basil1
- Balter and Greenberg1
- Baltimore Bargain House2
- Baltimore Pearl Hominy Mills1
- Bandes Development1
- Bandes-Stillman Development2
- Bankers Trust Company1
- Banner Milling Co.1
- Barber, D.2
- Barber, Donn1
- Barbier, George, 1882-19321
- Barbier, Jules, 1825-19011