| BK TOOL SALES | 4217448 | EVERETT | 1 |
| BK TREE SERVICE LLC | 3099656 | OLYMPIA | 1 |
| BK TRUCK LINE LLC | 8509149 | AUBURN | 1 |
| BKC ENTERPRISES LLC | 3755328 | SPOKANE VALLEY | 5 |
| BKS TRANSPORT INC | 2641178 | EVERSON | 12 |
| BL & Z TRUCKING LLC | 3800404 | MARYSVILLE | 1 |
| BL IRON INC | 3805996 | SPOKANE | 1 |
| BL MILLER CONSTRUCTION L.L.C. | 9746200 | VALLEY | 4 |
| BL MILLER CONSTRUCTION LL | 4315685 | VALLEY | 1 |
| BL TOWING LLC | 2322936 | LAKE TAPPS | 13 |
| BL TRANSPORTATION INC | 4392674 | MAPLE VALLEY | 1 |
| BLACC ICE TRASPORT LLC | 4070120 | TACOMA | 1 |
| BLACK ANCHOR LOGISTICS LLC | 8362979 | TACOMA | 1 |
| BLACK ARROW TRUCKING LLC | 4126299 | OTHELLO | 4 |
| BLACK BEAR CONSTRUCTION LLC | 4534223 | OLYMPIA | 1 |
| BLACK BEAR OUTPOST | 1975350 | SPANAWAY | 1 |
| BLACK CAT RANCH CONSTRUCTION LLC | 2499067 | SHELTON | 1 |
| BLACK COUGAR INC | 3041715 | RENTON | 1 |
| BLACK COYOTE TRANSPORTATION LLC | 3256089 | CHEHALIS | 1 |
| BLACK CREEK LLC | 2865010 | ABERDEEN | 0 |
| BLACK DIAMOND ASPHALT PAVING LLC | 2491106 | SPOKANE VALLEY | 34 |
| BLACK DIAMOND BLASTING LLC | 2727031 | KENT | 1 |
| BLACK DIAMOND CONCRETE CUTTING INC | 4473620 | BLACK DIAMOND | 1 |
| BLACK DIAMOND CONSTRUCTION LLC | 4383516 | EAST WENATCHEE | 1 |
| BLACK DIAMOND LOGISTICS LLC | 4096327 | RENTON | 1 |
| BLACK DIAMOND ROOFING & CONSTRUCTION INC | 3918375 | RICHLAND | 1 |
| BLACK DIAMOND ROOFING INC | 2302547 | OLYMPIA | 4 |
| BLACK DIAMOND SERVICES LLC | 3455573 | VANCOUVER | 2 |
| BLACK DIAMOND TRANSIT LLC | 8219205 | BUCKLEY | 2 |
| BLACK DIAMOND TREE SERVICES | 3603204 | PORT ANGELES | 3 |
| BLACK DIAMOND TRUCKING LLC | 2971168 | BLACK DIAMOND | 1 |
| BLACK DOG DUMPSTER AND RECYCLE | 3732003 | BOTHELL | 1 |
| BLACK DOG RECOVERY & TOWING | 3182029 | VANCOUVER | 2 |
| BLACK EAGLE EXPRESS LLC | 3581533 | PUYALLUP | 5 |
| BLACK FAMILY ENTERPRISES INC | 1895939 | FRIDAY HARBOR | 4 |
| BLACK FOREST ENTERPRISES INC | 1905594 | CHATTEROY | 1 |
| BLACK FOREST FOUNDATION INC | 2504300 | WENATCHEE | 2 |
| BLACK FOX ENTERPRISES LLC | 4146034 | FRIDAY HARBOR | 2 |
| BLACK HAWK FREIGHT SERVICES LLC | 3488849 | KENT | 0 |
| BLACK HILLS EXCAVATING INC | 1897045 | OLYMPIA | 3 |
| BLACK HILLS GYMNASTICS LLC | 2330924 | LACEY | 1 |
| BLACK HILLS INC | 3084246 | OLYMPIA | 14 |
| BLACK HILLS TREE SERVICE LLC | 1995459 | OLYMPIA | 2 |
| BLACK HORSE CONTRACTING LLC | 3496297 | FREELAND | 4 |
| BLACK HORSE RANCH | 2411517 | HUNTERS | 2 |
| BLACK INC | 1916387 | MANSFIELD | 1 |
| BLACK INC | 4258215 | WATERVILLE | 3 |
| BLACK INK TRANSPORTATION LLC | 1656197 | KENT | 1 |
| BLACK IRON CLEANOUTS LLC | 8309139 | EVERETT | 2 |
| BLACK IRON CONSTRUCTION LLC | 6261776 | OTHELLO | 1 |
| BLACK LAB EXCAVATION LLC | 3675674 | CARSON | 1 |
| BLACK LAKE AUTO INC | 2028427 | OLYMPIA | 4 |
| BLACK LAKE TOWING LLC | 2085471 | TUMWATER | 4 |
| BLACK LINE TRANSPORTATION LLC | 4163733 | BREMERTON | 1 |
| BLACK LION HEATING AND AIR CONDITIONING LLC | 2838591 | EVERETT | 0 |
| BLACK MAMBA TRANSPORTER LLC | 7807718 | BRUSH PRAIRIE | 1 |
| BLACK MARLIN SEALCOATING & CRACKFILL LLC | 4372559 | SPOKANE | 1 |
| BLACK MULE EXPRESS LLC | 2335961 | COVINGTON | 1 |
| BLACK PEARL EXPRESS LLC | 3283671 | PORT ORCHARD | 4 |
| BLACK PINE CONSTRUCTION LLC | 3356842 | KENNEWICK | 1 |
| BLACK PINE CONTRACTING INC | 1359503 | TWISP | 2 |
| BLACK RIDGE WILDLAND LLC | 4354955 | KENNEWICK | 1 |
| BLACK ROAD TRANSPORATION LLC | 4430153 | AUBURN | 1 |
| BLACK ROCK CARRIERS LLC | 4240346 | KENT | 1 |
| BLACK ROCK EXCAVATION LLC | 3732901 | COULEE CITY | 1 |
| BLACK ROCK MASONRY LLC | 3505753 | OAK HARBOR | 2 |
| BLACK ROCK RANCH | 3681722 | MOSES LAKE | 2 |
| BLACK ROSE TRANSPORTATION LLC | 7560133 | AUBURN | 2 |
| BLACK ROSE TRUCKING LLC | 2039107 | MAPLE VALLEY | 1 |
| BLACK SEA LLC | 3396795 | VANCOUVER | 1 |
| BLACK SEA LOGISTICS INC | 1449851 | VANCOUVER | 2 |
| BLACK SEA TRANSPORT LIMITED LIABILITY COMPANY | 3107422 | BATTLE GROUND | 1 |
| BLACK SHEEP EXCAVATION LLC | 4455271 | QUINCY | 1 |
| BLACK SHEEP HD MOBILE REPAIR LLC | 7307704 | ELLENSBURG | 2 |
| BLACK SHEEP TREE SERVICE LLC | 3972858 | NACHES | 2 |
| BLACK SMOKE ENTERPRISES LLC | 3541838 | LYNDEN | 1 |
| BLACK STALLION EXPRESS LLC | 2847630 | AUBURN | 3 |
| BLACK STAR RANCH LLC | 3557144 | MOXEE | 2 |
| BLACK STONES LANDSCAPING LLC | 9464589 | VANCOUVER | 1 |
| BLACK SWAN SASKATCHEWAN UNITED FIRE & RESCUE BRIGADE CONSORTIUM LLC | 2393025 | SNOHOMISH | 1 |
| BLACK THUNDER TRANSPORT | 2557331 | TACOMA | 6 |
| BLACK TIGAR TRANSPORT LLC | 2355906 | SEATAC | 60 |
| BLACK TOP SOLUTIONS INC | 1899683 | YELM | 2 |
| BLACK WIDOW EXCAVATION LLC | 9641168 | CHEHALIS | 2 |
| BLACK WIDOW EXCAVATION LLC | 4436671 | CHEHALIS | 2 |
| BLACK WOLF CONSTRUCTION LLC | 4237583 | SNOHOMISH | 0 |
| BLACKBURN EARTHWORKS LLC | 2949943 | BOW | 1 |
| BLACKBURN HEAVY HAUL LLC | 3299891 | MT VERNON | 2 |
| BLACKFISH CIVIL INFRASTRUCTURE INC | 4249748 | BURIEN | 1 |
| BLACKFISH VENTURES LLC | 4028992 | ANACORTES | 1 |
| BLACKHAWK CARRIER INC | 3919387 | BOTHELL | 11 |
| BLACKHAWK ENTERPRISES INC | 2219183 | FEDERAL WAY | 0 |
| BLACKHAWK TRUCKING INC | 3893047 | AUBURN | 1 |
| BLACKHORSE TRANSPORTATION GROUP INC | 2215060 | HANSVILLE | 0 |
| BLACKJACK BUSINESS SERVICES | 2309247 | LIBERTY LAKE | 1 |
| BLACKLAKETIMBER | 2021629 | OLYMPIA | 1 |
| BLACKLINE INC | 325763 | WOODLAND | 13 |
| BLACKLOTUS LANDSCAPING LLC | 2991248 | PORT ORCHARD | 9 |
| BLACKMOUTH DESIGN | 4502836 | BAINBRIDGE ISLAND | 1 |
| BLACKMOUTH DESIGN LLC | 4502704 | BAINBRIDGE ISLAND | 1 |