Former Owner
- Bernard Rosenthal1
- Bernardi1
- Bernardo Bembo1
- Bertram Ashburnham, 4th Earl of Ashburnham10
- Bet din tsedeḳ London ṿeha-medinah1
- Beverly Chew1
- Biblioteca civica di Verona1
- Biblioteca del Seminario Arcivescovile1
- Bill Jackson1
- Bloomsbury Auctions4
- Bodleian Library1
- Breslauer and Meyer1
- Brick Row Book Shop1
- Bruce P. Ferrini1
- Budapest University of Jewish Studies1
- Buxheim Charterhouse1
- C.J. Spence1
- Camillo Riccio1
- Carl Hermann Grabauer1
- Carleton Rubira Richmond1