- 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
- Balter and Greenberg1
- Baltimore Bargain House2
- Baltimore Pearl Hominy Mills1
- Bandes Development1
- Bandes-Stillman Development2
- Bankers Trust Company1
- Banner Milling Co.1
- Barber, Donn1
- Barclay Plaza Association5
- Bardon Realty Corp.1
- Barg Estates, Inc.1
- Barguard Building Corp.1
- Barkin, Samuel1
- Barlau Estates, Inc.1
- Barnaby-Sutton Realty Co.1
- Barnard, Sumner, and Putnam Company1
- Barnes & Park1
- Baron and Lutzky2
- Barr, Irons and Lane, Inc.6
- Bates, Allan Bradley3
- Bauch & Sons Company1
- Bawo & Dotter5
- Bay Plaza Apartments, Inc.1
- Bay Ridge Development Corp.1
- Bay Shore Gardens, Inc.1
- Bay St. Landing Associates1
- Bayle, Lacoste & Co.1
- Beach 22 St. Holding Corp.1
- Beach Property Corp.1
- Beards & Cummings1
- Beaumont Development Corp.1
- Beck, Letty J.1