- Anthony Campagna and Sons2
- Antry Realty Corp.1
- Arbeit, Arnold A.1
- Arcadia Realty Corp.1
- Architects Collaborative1
- Architects Design Group5
- Arende Building Corp.1
- Argent Construction Corp.1
- Argot Construction Corp.1
- Arista Realty Corp.1
- Arlen, Samuel S.1
- Arlington Terrace, Inc.3
- Arnold M. Goldman Co.1
- Arnold M. Goldman and Co., Inc.11
- Arrowbrook Garden Corp.3
- Arsmith Realty Co., Inc.1
- Arthur Eckstein, Inc.1
- Arthur Hardgrove Co.3
- Artpaul Realty Co., Ltd.1
- Artsis, Jerome M.1
- Asch, Stephen1
- Ascot Estates, Inc.1
- Asher Dann and Sons2
- Asher Dann and Sons, Inc.1
- Ashley Apartments, Inc.2
- Associate Architects1
- Associated Music Publishers1
- Astor, Vincent1
- Astoria Associates, Inc.1
- Atholl Corp.1
- Atlas Terminals, Inc.1
- Atlas, Sol G.5
- Austin Building Corp.1
- Avalon Terrace, Inc.1
- Avenue A Apartments Inc.1
- Avenue Associates1
- Avlon, John1
- Axelrod-Walker Corp.1
- B. and I. Realty Corp.1
- Babor-Comeau and Co., Inc.1
- Bailey, Lionel M.1
- Baldwin Gardens, Inc.2
- Barclay Plaza Apartments, Inc.1
- Bargut Realty Co., Inc.1
- Barjo Homes, Inc.1
- Barker Realty Corp.1
- Barmont Realty Corp.1
- Barnaby Realty and Construction Co.1
- Barnaby-Sutton Realty Co.1
- Barocas and Dwoskin1
- Baron and Lutzky1
- Barstow-Grace Apartments, Inc.1
- Barta Realty Corp.1
- Bastine and Co., Inc.2
- Bates, Allan Bradley1
- Baxter Building Corp.1
- Baxton Realty Corp.2
- Bay Shore Manor, Inc.1
- Bay St. Landing Associates1
- Baybrooke Realty Corp.1