- Boden & Graehl1
- Bogdus Holding Corp.1
- Bohn Mfg. Co.1
- Bolster, Snow & Co.1
- Bonner Realty and Construction Corp.9
- Bonnett, Schenk & Earle1
- Bonnie Lynn Realty Corp.1
- Boomer, Lucius6
- Borchard Affiliates, Inc.4
- Borchard Management Corp.7
- Borne-Chisner Development Corp.15
- Bosa Builders, Inc.1
- Bosa Building Corp.1
- Boston Belting Company2
- Boston Enterprise Manufacturing Co.1
- Boston Herald Co.3
- Botannia Corp.1
- Boulevard Construction Corp.1
- Bowker, Torrey & Co.1
- Boynton Furnace Co.1
- Bradas & Gheens1
- Bradhurst Associates, Inc.1
- Bradley & Currier Co.1
- Bradley & Smith3
- Brandinger, A.1
- Branton Apartments, Inc.1
- Braunstein, Benjamin18
- Brazil Bank1
- Brecher, Morris1
- Breed, Fuller, and Dick2
- Bres Realty Co.13
- Brett and Wyckoff, Inc.16
- Brett, Wyckoff, Potter, Hamilton, Inc.15
- Brevoort Associates, Inc.8
- Briarwood Court One Corp.1
- Briarwood Holding Corp.3
- Bricken Brothers, Inc.1
- Bridge & Beach M'f'g Co.1
- Bridgeport Wood Finishing Co.2
- Brill-Tishman Construction Co.3
- Briscope Management3
- Brittan, Holbrook & Co.1
- Britz, Steven Pan3
- Broadway Bargain House1
- Broadway Central Hotel2
- Broadway-New Street Corp.2
- Brodhead & VanWagenen1
- Brody, S.A.2
- Broff, Irving1
- Broff, Stanley R.24
- Broka, Clifford V.2
- Bronxwood Towers, Inc.9
- Brookboro Realty Corp.1
- Brookfield Organization2
- Brooklyn Daily Eagle1
- Brotherhood Wine Co.2
- Brown & McCully1
- Brown and Guenther11
- Brown, Bill & Co.1
- Brown, Durrell & Co.6