| Board Of Trustees | Logansport | IN |
| Bohn Aluminum & Brass Coroporation | Butler | IN |
| Bohn Aluminum & Brass Coroporation | Greensburg | IN |
| Boonville Electric Light & Power | Boonville | IN |
| Bootz Manufacturing | Evansville | IN |
| Borg-Warner | Muncie | IN |
| Bosse High School | Evansville | IN |
| Boston & Ohio Railroad | Garrett | IN |
| Boxboard Mills | Elkhart | IN |
| Bragg Re Assoc. | Indianapolis | IN |
| Brand Insulation | Indianapolis | IN |
| Bremen Bearings | Bremen | IN |
| Bridgeport Brass | Indianapolis | IN |
| Briel Industries | Jeffersonville | IN |
| Briggs Plumbing & Heating | Goshen | IN |
| Bristol Myers Squibb | Evansville | IN |
| Broadway Works | Fort Wayne | IN |
| Brockway Glass | Lapel | IN |
| Brodey & Brodey | Indianapolis | IN |
| Brooks Construction | Fort Wayne | IN |
| Brooks Foods | Mount Summit | IN |
| Brookview Utility | Griffith | IN |
| Brower & Love Brothers | Indianapolis | IN |
| Brown Mollasses | Bremen | IN |
| Brown Refractory Service | Indianapolis | IN |
| Brown Rubber | Lafayette | IN |
| Brunner Water Pollution Control Plant | Fort Wayne | IN |
| Bryan Manufacturing | North Manchester | IN |
| Bryan Manufacturing | Indianapolis | IN |
| Bryan Manufacturing | Peru | IN |
| Bryan Steam | Peru | IN |
| Bucyrus Erie | Evansville | IN |
| Budd | Gary | IN |
| Buehler | Indianapolis | IN |
| Bunsen Coal | Clinton | IN |
| Burch Plow | Evansville | IN |
| Burns Harbor | Burns Harbor | IN |
| Burton Plumbing & Heating | Rochester | IN |
| Butler University | Indianapolis | IN |
| B. Walter & Company | Wabash | IN |
| B.W. Bissel & Company | Anderson | IN |
| Cabot | Kokomo | IN |
| California Packing | Frankfort | IN |
| Calumet Nitrogen | Hammond | IN |
| Calumet Steel | Hammond | IN |
| Campbell Soup | Terre Haute | IN |
| Cannelton Sewer Pipe | Cannelton | IN |
| Capalyptic Const. Gate | East Chicago | IN |
| Capital Products | Kentland | IN |
| Carbide & Carbon Chemicals | Whiting | IN |
