- Bragoni, Hugh1
- Brause and Brause1
- Bres Realty Co.16
- Brett and Wyckoff, Inc.22
- Brett, Wyckoff, Potter, Hamilton, Inc.31
- Brevoort Associates, Inc.13
- Bricken Brothers, Inc.3
- Briscope Management4
- Brittany Construction Corp.1
- Britton Development Ltd.1
- Britz, Steven Pan4
- Broadway Bennett Corp.1
- Broadway Equities, Inc.1
- Broadway-New Street Corp.3
- Broff, Irving1
- Broff, Stanley R.27
- Broka, Clifford V.2
- Brown, Harris, Stevens, Inc.112
- Brown, Wheelock, Harris and Co., Inc.1
- Brown, Wheelock, Harris, Inc.1
- Brown, Wheelock, Harris, Stevens, Inc.70
- Brown, Wheelock, Harris, Vought and Co., Inc.80
- Brown, Wheelock: Vought & Co., Inc.3
- Buckingham and Co.12
- Budd Management8
- Burrow, King and Co.12
- Butler and Baldwin5
- Byrne and Bowman7
- Byrne, Bowman, and Forshay, Inc.52
- C. I. Mortgage Group1
- CH Construction Corp.1
- CLMC Corp.1
- Cabrini Terrace Co.1
- Cadillac Fairview3
- Calvin-Morris Corp.14
- Campagna Construction Corp.16
- Campagna, Anthony19
- Campagna, John J.7
- Canada House (New York) Ltd.1
- Canin1
- Carlton Estate Inc.1
- Carnegie Management Co.2
- Carol Management Corp.2
- Carreau, Lewis3
- Carstens, Linnekin, and Wilson, Inc.1
- Castle Villiage Inc.4
- Cauldwell-Wingate Co., Inc.5
- Chain Building Corp.1
- Charles F. Noyes Co., Inc.5
- Charles H. Greenthal & Co.3
- Charles H. Greenthal & Co., Inc.2
- Charles H. Greenthal and Co., Inc.122
- Chattilon, E.H.4
- Chelsea Associates1
- Chelsea Land Corp.1
- Chelsea Management Corp.15
- Chester Lane, Inc.2
- Churchill Land Corp.1
- Ciluzzi Construction Corp.1
- Citizens Savings Bank1