| Banner Rock Products | Alexandria | IN |
| Barber-Colman | Indianapolis | IN |
| Barger & Hammer | Mount Vernon | IN |
| Barry Refining | Gary | IN |
| Bates & Rogers Construction | Kingsbury | IN |
| Beach Grove Shops | Indianapolis | IN |
| Bearing Service | South Bend | IN |
| Bearing Service | Indianapolis | IN |
| Beatty Memorial Hospital | Westville | IN |
| Bedford Stone Quarries | Oolitic | IN |
| Beech Grove Railroad Shops | Beech Grove | IN |
| BELCO | Connersville | IN |
| Bell Brass Aluminum | Auburn | IN |
| Bell Fibre Products | Marion | IN |
| Belmont Sewage Treatment | Indianapolis | IN |
| Bendix | South Bend | IN |
| Bennett Material | Aurora | IN |
| Bentz Metal Products | Fort Wayne | IN |
| Berghoff Brewing Association | Fort Wayne | IN |
| Berry Refining | Gary | IN |
| Best Laundry Cleaners | Indianapolis | IN |
| Beta Theta Pi | Crawfordsville | IN |
| Bethlehem Healing Temple | Gary | IN |
| Bethlehem Steel | Portage | IN |
| Bethlehem Steel | Burns Harbor | IN |
| Bethlehem Steel | Hammond | IN |
| Bethlehem Steel | Gary | IN |
| Bethlehem Steel | Chesterton | IN |
| Beveridge Paper | Indianapolis | IN |
| BFGoodrich | Woodburn | IN |
| BFGoodrich | New Haven | IN |
| BFGoodrich | Fort Wayne | IN |
| Big Four Railway | Indianapolis | IN |
| Big Four Route Railroad | Indianapolis | IN |
| Big Four Route Railroad | Wabash | IN |
| Birdsell Manufacturing | South Bend | IN |
| Birma Products | Greenfield | IN |
| Bixby Company-Two-In-One-Shinola | Indianapolis | IN |
| Blackford Window, Glass | Vincennes | IN |
| Blaw-Knox | East Chicago | IN |
| Blish Milling | Seymour | IN |
| Blocksom & Company | Michigan City | IN |
| Bloomington Bell | Bloomington | IN |
| Bloomington Hospital | Bloomington | IN |
| Blue River Packing | Morristown | IN |
| Bluffton City High School | Bluffton | IN |
| Bluffton Schools | Bluffton | IN |
| Board Of Public Works | Anderson | IN |
| Board Of Sanitary Commissioners | Indianapolis | IN |
| Board Of School Comissioners | Indianapolis | IN |
