| AAm-Tec | Tulsa | — | ◇ UNVERIFIED |
| AMApollo Metal Specialties, INC. | Claremore | — | ◇ UNVERIFIED |
 Associated Steel Fabricators INC. | Oklahoma City | — | ◇ UNVERIFIED |
| AFAtlantic Fabrication and Design, LLC | Oklahoma City | — | ◇ UNVERIFIED |
| AMAtlantic Meeco | Mcalester | — | ◇ UNVERIFIED |
| AMAuto-turn Manufacturing, INC | Broken Arrow | — | ◇ UNVERIFIED |
| ABAW Brueggemann | Enid | — | ◇ UNVERIFIED |
| ABA.w. Brueggemann CO. | Enid | — | ◇ UNVERIFIED |
| BCBadgett CORP | Chickasha | — | ◇ UNVERIFIED |
| BIBalco INC. | Oklahoma City | — | ◇ UNVERIFIED |
| BEBaldor Electric Company, a Member of Abb Group | Claremore | — | ◇ UNVERIFIED |
 Basden Steel-oklahoma, LLC | Claremore | — | ◇ UNVERIFIED |
| BBayotech | Catoosa | — | ◇ UNVERIFIED |
| BBB & B Sheet Metal | Oklahoma City | — | ◇ UNVERIFIED |
| BCB & C Machine Company, INC. | Oklahoma City | — | ◇ UNVERIFIED |
| BMB.c. Mechanical, LLC | Newkirk | — | ◇ UNVERIFIED |
| BDB D & J INC. | Tulsa | — | ◇ UNVERIFIED |
| BEBeekmann Enterprises | Owasso | — | ◇ UNVERIFIED |
| BSBennett Steel Fabrication, INC. | Sapulpa | — | ◇ UNVERIFIED |
| BABlack Acorn, LLC | Atoka | — | ◇ UNVERIFIED |
| BIBluearc Innovations LLC / Bluearc Innovations LLC | Marlow | — | ◇ UNVERIFIED |
| BWBlue Wolf Blasting LLC | Choctaw | — | ◇ UNVERIFIED |
| BMB & M Metal Works | Catoosa | — | ◇ UNVERIFIED |
| BMBoyle Manufacturing | Tulsa | — | ◇ UNVERIFIED |
| BMBradley Machine & Design, L.l.c. | Chickasha | — | ◇ UNVERIFIED |
| BEBreshears Enterprises, INC. | Oklahoma City | — | ◇ UNVERIFIED |
| BABroken Arrow Powder Coating, INC. | Broken Arrow | — | ◇ UNVERIFIED |
| BCBrooks Custom Fabrication, INC. | Tulsa | — | ◇ UNVERIFIED |
| BSBs&b Safety Sys L L C | Tulsa | — | ◇ UNVERIFIED |
| BGBuffalo Grating LLC | Tulsa | — | ◇ UNVERIFIED |
| BSBuilders Steel INC / 1924 S 49th W Ave Steel Fab Shop | Tulsa | — | ◇ UNVERIFIED |
| BMBurgett Metal Works | Coweta | — | ◇ UNVERIFIED |
| BPBurns Pressure Systems | Broken Arrow | — | ◇ UNVERIFIED |
| BPBurrow's Post Frame Supply | Fort Gibson | — | ◇ UNVERIFIED |
| BIBW2G Investments LLC | Glenpool | — | ◇ UNVERIFIED |
| BWB & W Manufacturing Company | Tulsa | — | ◇ UNVERIFIED |
| CECallaway Equipment | Oklahoma City | — | ◇ UNVERIFIED |
| CECallaway Equipment & Manufacturing, INC. | Oklahoma City | — | ◇ UNVERIFIED |
| CICalvin Industries, LLC | Skiatook | — | ◇ UNVERIFIED |
| CPCanopies Plus, INC. | Eufaula | — | ◇ UNVERIFIED |
| CRCarlson's Rural Mailbox | Oklahoma City | — | ◇ UNVERIFIED |
| CCCasady 'n' Company, LLC | Oklahoma City | — | ◇ UNVERIFIED |
| CACasting and Coating, CORP. | Tulsa | — | ◇ UNVERIFIED |
| CPCavett Portable Buildings | Ponca City | — | ◇ UNVERIFIED |
| CICentek INC / Centek Facility | Oklahoma City | — | ◇ UNVERIFIED |
| CSCentral Sheet Metal, LLC | Seminole | — | ◇ UNVERIFIED |
| CICeo, INC. | Sapulpa | — | ◇ UNVERIFIED |
| CMCerified Machine & Design, INC. | Oklahoma City | — | ◇ UNVERIFIED |
| COChampion Opco, LLC | Oklahoma City | — | ◇ UNVERIFIED |
| CCCharlotte Carpenter | Owasso | — | ◇ UNVERIFIED |
