| BLACK DOG TRUCKING LLC | 3345426 | DOUGLAS | 1 |
| BLACK EARTH CONTRACTORS LLC | 4146764 | GILLETTE | 1 |
| BLACK GOLD ENERGY SERVICE LLC | 3211488 | GILLETTE | 38 |
| BLACK GOLD HAULING LLC | 2573822 | CHEYENNE | 1 |
| BLACK GOLD PAVING | 4414443 | GILLETTE | 1 |
| BLACK GOLD SERVICES INC | 3632548 | CASPER | 2 |
| BLACK HAWK CRANE LLC | 5366930 | GILLETTE | 34 |
| BLACK HILLS BENTONITE LLC | 535461 | CASPER | 3 |
| BLACK HILLS LIGNITE LLC | 3439667 | GLENROCK | 2 |
| BLACK JACK INSPECTION INC | 1574573 | EVANSTON | 1 |
| BLACK LABEL ORIGINALS | 1695372 | GILLETTE | 2 |
| BLACK MOUNTAIN TRANSPORT LLC | 4141506 | SHERIDAN | 1 |
| BLACK MOUNTAIN WELL SERVICE INC | 1456716 | DOUGLAS | 3 |
| BLACK ROCK MINE SERVICE LLC | 2527337 | GILLETTE | 28 |
| BLACK ROCK TRUCKING INC | 2196875 | ROCK SPRINGS | 1 |
| BLACK ROSE CARRIERS LLC | 2377339 | JACKSON | 1 |
| BLACK SHEEP LIVESTOCK LLC | 1429098 | MANDERSON | 2 |
| BLACK TOOTH TRANSPORT LLC | 2940092 | BUFFALO | 1 |
| BLACK WATER ENVIRONMENTAL LLC | 3498113 | GILLETTE | 2 |
| BLACK WATER SEPTIC SOLUTIONS | 2799854 | SINCLAIR | 2 |
| BLACK WATER SOLUTIONS LLC | 4410476 | LANDER | 3 |
| BLACK WILLOW SANITATION | 860021 | THERMOPOLIS | 1 |
| BLACK WOLF CONSTRUCTION LLC | 7002942 | SARATOGA | 3 |
| BLACKBURN CATTLE COMPANY INC | 657974 | DOUGLAS | 12 |
| BLACKHAWK CRANE & RIGGING INC | 307675 | GILLETTE | 10 |
| BLACKOUT HOTSHOT LLC | 5694364 | CHEYENNE | 1 |
| BLACKS FORK DIRT WORX LLC | 4398301 | LYMAN | 2 |
| BLACKS FORK EQUIPMENT RENTALS LLC | 6104969 | LYMAN | 2 |
| BLACKS FORK TIMBER PRODUCTS INC | 3108120 | MOUNTAIN VIEW | 6 |
| BLACKTOP PROS LLC | 2634962 | ALPINE | 2 |
| BLAIN BAILEY | 4107355 | GILLETTE | 1 |
| BLAINE LAWRENCE | 1779285 | DOUGLAS | 1 |
| BLAINE LENTZ | 1488148 | LARAMIE | 1 |
| BLAKE A DOMINGUEZ | 647807 | TORRINGTON | 1 |
| BLAKE DRILLING INC | 273610 | GILLETTE | 2 |
| BLAKE TRUCKING LLC | 3263813 | RIVERTON | 12 |
| BLAKE TYLER MAXWELL | 4490087 | MOORCROFT | 1 |
| BLAKEMAN PROPANE INC | 345250 | MOORCROFT | 74 |
| BLANCHARDS WELL SITE MGMT | 4335110 | EVANSTON | 1 |
| BLANKENSHIP CONCRETE LLC | 1650583 | CODY | 1 |
| BLAYLOCK TRUCKING | 1733261 | DOUGLAS | 1 |
| BLAZE TRUCKING LLC | 2135805 | CASPER | 1 |
| BLAZIN TRAILS TRUCKIN LLC | 4143723 | FARSON | 1 |
| BLESSED PERFORMANCE LLC | 4449258 | GILLETTE | 2 |
| BLEVINS TRUCKING LLC | 4391793 | TORRINGTON | 1 |
| BLOEDORN LUMBER BUFFALO | 2075713 | BUFFALO | 6 |
| BLOEDORN LUMBER CASPER | 1165192 | CASPER | 9 |
| BLOEDORN LUMBER CHEYENNE | 122757 | CHEYENNE | 7 |
| BLOEDORN LUMBER CODY | 513999 | CODY | 5 |
| BLOEDORN LUMBER COMPANY - LANDER | 4077820 | LANDER | 5 |
| BLOEDORN LUMBER COMPANY - RIVERTON | 4108897 | RIVERTON | 5 |
| BLOEDORN LUMBER DOUGLAS | 1866001 | DOUGLAS | 2 |
| BLOEDORN LUMBER GILLETTE | 330376 | GILLETTE | 6 |
| BLOEDORN LUMBER LARAMIE | 110216 | LARAMIE | 8 |
| BLOEDORN LUMBER POWELL | 1252290 | POWELL | 4 |
| BLOEDORN LUMBER ROCK SPRINGS | 330659 | ROCK SPRINGS | 4 |
| BLOEDORN LUMBER SHERIDAN | 330404 | SHERIDAN | 7 |
| BLOEDORN LUMBER TORRINGTON | 52245 | TORRINGTON | 5 |
| BLOEDORN LUMBER WHEATLAND | 4109003 | WHEATLAND | 3 |
| BLOEDORN LUMBER WORLAND | 3448466 | WORLAND | 5 |
| BLOOM LLC | 4424290 | JACKSON | 3 |
| BLOWIN MONEY LOGISTICS LLC | 4096323 | WAMSUTTER | 1 |
| BLOXOM TRUCKING LLC | 865057 | GILLETTE | 1 |
| BLUE BIRD BROKERAGE LLC | 3937181 | DUBOIS | 0 |
| BLUE BULL INC | 812516 | LANDER | 3 |
| BLUE BULLDOG LOGISTICS LLC | 3110715 | GILLETTE | 1 |
| BLUE COLLAR LOGISTICS INC | 721947 | DOUGLAS | 1 |
| BLUE CRESCENT LLC | 3402746 | DOUGLAS | 2 |
| BLUE PACIFIC NORTHWEST TRANSPORTATION MANAGEMENT & CONSULTING LLC | 4545465 | SHERIDAN | 0 |
| BLUE RIBBON TRUCKING LLC | 4582186 | THAYNE | 2 |
| BLUE SKY CONSTRUCTION | 819711 | MARBLETON | 1 |
| BLUE SKY ENTERPRISES INC | 1766734 | PINEDALE | 10 |
| BLUE SKY TRANSPORT & SERVICES LLC | 973350 | ROZET | 1 |
| BLUE SPUR TRUCKING INC | 306705 | RIVERTON | 3 |
| BLUEGATE PCA LLC | 4105845 | EVANSVILLE | 3 |
| BLUEPRINT ENERGY PARTNERS LLC | 3297877 | CASPER | 3 |
| BLUEWAVES TRADING CORPORATION | 3415874 | SHERIDAN | 0 |
| BLUGH AUTO TRANSPORT LLC | 3467239 | CASPER | 0 |
| BM TRUCKING LLC | 3144348 | GLENROCK | 1 |
| BND CONTRACTION LLC | 3437123 | BIG PINEY | 0 |
| BNJ CONSTRUCTION | 1133875 | MOUNTAIN VIEW | 2 |
| BO'S H20 | 1708327 | SHERIDAN | 1 |
| BOB KEELE TRUCKING INC | 584423 | RIVERTON | 7 |
| BOB'S PLUMBING AND HEATING INC | 420916 | BURNS | 1 |
| BOBBY J ALLEN | 704894 | GILLETTE | 1 |
| BOBBY WILSON | 1325679 | PINEDALE | 1 |
| BOBCAT OF THE BIG HORN BASIN LLC | 2074291 | CODY | 5 |
| BOBS AUTO | 3297892 | POWELL | 6 |
| BOCKMAN GROUP LLC | 3027310 | RANCHESTER | 2 |
| BODACO LLC | 4305863 | PINEDALE | 1 |
| BOELENS' WELL SERVICE LLC | 381390 | BAGGS | 12 |
| BOGGS PLUMBING LLC | 2545955 | DOUGLAS | 1 |
| BOLAR TRUCKING LLC | 3508978 | LUSK | 2 |
| BOLES WELDING | 1507921 | CASPER | 2 |
| BOLINGER INC | 892685 | BUFFALO | 5 |
| BOMBER MOUNTAIN BUS LLC | 3858523 | SHERIDAN | 2 |
| BOMBER MOUNTAIN DEMO LLC | 4205551 | RANCHESTER | 1 |
| BONANZA EARTH RELOCATORS LLC | 191059 | DOUGLAS | 6 |
| BOND EXPRESS LLC | 3541328 | WORLAND | 0 |
| BONDS BREWING COMPANY LLC | 3692735 | LARAMIE | 1 |