- Bradley & Smith3
- Brandinger, A.1
- Branton Apartments, Inc.1
- Braunstein, Benjamin18
- Brazil Bank1
- Brecher, Morris1
- Breed, Fuller, and Dick2
- Breitkopf & Härtel1
- 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
- Broadcast Music, Inc.1
- 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
- Brooklyn Museum Concerts1
- Brotherhood Wine Co.2
- Brown & McCully1
- Brown and Guenther11
- Brown, Bill & Co.1
- Brown, Durrell & Co.6
- Brown, Guenther, Battaglia and Galvin8
- Brown, Guenther, Boos1
- Brown, Harris & Hopkins1
- Brown, Harris, Stevens, Inc.97
- Brown, Jack55
- Brown, Simon and Furtsch, Inc.2
- Brown, Thompson & Company1
- Brown, Wheelock, Harris and Co., Inc.1
- Brown, Wheelock, Harris, Inc.1
- Brown, Wheelock, Harris, Stevens, Inc.61
- Brown, Wheelock, Harris, Vought and Co., Inc.74
- Brown, Wheelock: Vought & Co., Inc.1
- Brown. Harris, Stevems, Inc.8
- Browning, King and Co.1
- Bruce Operating Co.1
- Brunetti, Louis1
- Brunoff, Maurice de2
- Bruton, Francis X.1
- Bruzza, G.1
- Bstan-ʼdzin-rgya-mtsho, Dalai Lama XIV, 1935-1