| BLACK HILLS SPINE INSTITUTE, LLC | DL019266 | 2009-06-29 | Active | RAPID CITY |
| BLACK HILLS SPINE, LLC | DL024281 | 2011-04-04 | Dissolved | RAPID CITY |
| BLACK HILLS SPOKE & SPORT, INC. | DB031365 | 1992-01-24 | Dissolved | — |
| BLACK HILLS SPORTS CAR CLUB, INC. | NS000143 | 1959-04-10 | Active | Sturgis |
| BLACK HILLS SPORTS PERFORMANCE, LLC | DL019192 | 2009-06-22 | Dissolved | RAPID CITY |
| BLACK HILLS SPORTS, INC. | NS002747 | 1956-02-18 | Active | RAPID CITY |
| BLACK HILLS SPORTSMAN'S COMPLEX | NS012055 | 2002-07-02 | Inactive | — |
| BLACK HILLS SPORTSMEN CLUB, INC. | NS013917 | 2009-01-08 | Active | Rapid City |
| Black Hills Spray Foam Inc. | DB061091 | 2016-08-26 | Dissolved | RAPID CITY |
| Black Hills Spray Tan LLC | DL132665 | 2017-04-17 | Dissolved | SPEARFISH |
| Black Hills Spraying LLC | DL208486 | 2021-08-17 | Dissolved | Belle Fourche |
| BLACK HILLS SPRINT CAR, INC. | DB015473 | 1978-07-14 | Inactive | — |
| BLACK HILLS STABLES LLC | DL013392 | 2007-03-09 | Dissolved | — |
| Black Hills Staffing LLC | DL198171 | 2021-03-08 | Inactive | Rapid City |
| BLACK HILLS STAGE LINES, INC. | FB001944 | 1962-09-12 | Revoked | NORFOLK |
| Black Hills Stage Stop Rentals LLC | DL046552 | 2016-01-04 | Dissolved | Whitewood |
| Black Hills Stars | NS300127 | 2025-05-12 | Active | Piedmont |
| BLACK HILLS STATE BANK OF SOUTH DAKOTA | BK000176 | 1991-03-05 | Inactive | — |
| BLACK HILLS STATE UNIVERSITY ALUMNI ASSOCIATION | NS000972 | 1966-04-26 | Active | SPEARFISH |
| BLACK HILLS STATE UNIVERSITY FOUNDATION | NS005720 | 1975-02-07 | Active | SPEARFISH |
| BLACK HILLS STEAK COMPANY, LLC | DL045127 | 2015-09-14 | Dissolved | Spearfish |
| BLACK HILLS STEEL ERECTORS, INC. | DB040853 | 1998-12-24 | Active | RAPID CITY |
| BLACK HILLS STOCK SHOW AND RODEO, INC. | DB039673 | 1998-02-12 | Dissolved | ONIDA |
| BLACK HILLS STOCK SHOW FOUNDATION | NS009795 | 1993-01-25 | Active | RAPID CITY |
| BLACK HILLS STONE MASONRY, L.L.C. | DL013239 | 2007-02-20 | Active | HILL CITY |
| Black Hills Stone Massage LLC | DL213920 | 2022-02-01 | Dissolved | Lead |
| BLACK HILLS STRATEGIC ENTERPRISE CO. | DB050433 | 2005-12-21 | Inactive | BROOKINGS |
| BLACK HILLS STRIDES, LLC | DL012498 | 2006-11-14 | Inactive | RAPID CITY |
| Black Hills Strip & Shine Floor Co. L.L.C. | DL325287 | 2026-04-06 | Active | Rapid City |
| Black Hills Striping LLC | DL223350 | 2022-03-23 | Active | Sturgis |
| Black Hills STRs, LLC | DL245298 | 2023-02-27 | Active | Rapid City |
| Black Hills Studio Inc. | NS049558 | 2015-01-12 | Active | Deadwood |
| BLACK HILLS STUDIOS | DB000094 | 1958-04-14 | Dissolved | — |
| Black Hills Studios of the Arts | NS168798 | 2019-08-15 | Active | Rapid City |
| BLACK HILLS SUBS INC. | DB043577 | 2000-12-27 | Active | SPEARFISH |
| BLACK HILLS SUN, LLC | DL016869 | 2008-06-30 | Active | RAPID CITY |
| Black Hills Sunrise Oasis, LLC | DL300067 | 2025-05-12 | Active | Rapid City |
| BLACK HILLS SUNROOMS, LLC | DL027347 | 2012-02-27 | Dissolved | SPEARFISH |
| Black Hills SUP LLC | DL253325 | 2023-06-22 | Dissolved | Rapid City |
| BLACK HILLS SURGICAL HOSPITAL, L.L.P. | DR000043 | 1996-03-07 | Active | RAPID CITY |
| Black Hills Surgical Hospital, LLC | DL287147 | 1996-03-07 | Active | RAPID CITY |
| BLACK HILLS SURGICAL PHYSICIANS, LLC | DL007065 | 2004-03-15 | Active | Rapid City |
| BLACK HILLS SURGICAL, INC. | DB023682 | 1984-08-21 | Dissolved | — |
| BLACK HILLS SURGICAL, LLC | DL007066 | 2004-03-15 | Inactive | RAPID CITY |
| BLACK HILLS SURVEYING, INC. | DB034818 | 1994-09-20 | Inactive | — |
| BLACK HILLS SUZUKI SCHOOL | NS011302 | 1999-07-14 | Active | RAPID CITY |
| Black Hills Sword of the Spirit Monastery | NS165228 | 2019-05-28 | Dissolved | STURGIS |
| BLACK HILLS SYMPHONY LEAGUE, INC. | NS008505 | 1987-03-30 | Active | RAPID CITY |
| BLACK HILLS SYMPHONY ORCHESTRA SOCIETY, INC. | NS006311 | 1977-08-19 | Active | Rapid City |
| Black Hills Tactical Knives, LLC | DL151133 | 2018-07-16 | Active | Edgemont |
| Black Hills Tactical LLC | DL330924 | 2026-06-11 | Active | Rapid City |
| BLACK HILLS TAEKWONDO, L.L.C. | DL001290 | 1997-07-03 | Active | Rapid City |
| Black Hills Tallow LLC | DL306396 | 2025-08-05 | Active | Custer |
| BLACK HILLS TANNERS, LLC | DL015902 | 2008-02-29 | Inactive | — |
| BLACK HILLS TATANKA, L.L.C. | DL017146 | 2008-08-12 | Inactive | BLACK HAWK |
| Black Hills Tattoo and Piercing LLC | DL045871 | 2015-11-16 | Active | Box Elder |
| BLACK HILLS TATTOO AND PIERCING, INC. | DB043043 | 2000-07-14 | Inactive | — |
| BLACK HILLS TAXI SERVICE LLC | DL018283 | 2009-02-11 | Active | Deadwood |
| BLACK HILLS TECH SOLUTIONS LLC | DL031525 | 2013-03-07 | Dissolved | BOX ELDER |
| BLACK HILLS TECHNOLOGIES, LLC | DL008844 | 2005-03-16 | Active | Hill City |
| BLACK HILLS TELECOMMUNICATIONS COOPERATIVE, INC. | CO000803 | 1988-04-15 | Dissolved | CUSTER |
| BLACK HILLS TELEPHONE COMPANY, INC. | PU000815 | 1959-12-17 | Inactive | — |
| BLACK HILLS TENNIS ASSOCIATION, INC. | NS010031 | 1994-02-14 | Active | RAPID CITY |
| BLACK HILLS TENT AND AWNING COMPANY | DB007046 | 1967-12-08 | Dissolved | — |
| Black Hills Thermography LLC | DL165064 | 2019-05-22 | Suspended | Box Elder |
| BLACK HILLS THINNING, LLC | DL024813 | 2011-05-31 | Dissolved | DEADWOOD |
| BLACK HILLS TIMBER EQUIPMENT LEASING, LLC | DL130281 | 2017-02-02 | Suspended | Whitewood |
| BLACK HILLS TIMBER EQUIPMENT LLC | DL005858 | 2003-05-14 | Suspended | — |
| BLACK HILLS TIMBER EQUIPMENT MANAGEMENT, LLC | DL130303 | 2017-02-02 | Suspended | Whitewood |
| Black Hills Timber Works Inc | DB323202 | 2026-03-13 | Active | Hot Springs |
| Black Hills Timberscapes LC | DL208456 | 2021-08-17 | Active | Lead |
| Black Hills Tint Studio LLC | DL296321 | 2025-05-01 | Suspended | Rapid City |
| Black Hills Tint, LLC | DL035315 | 2013-10-02 | Inactive | Spearfish |
| Black Hills Tiny Cabins and Cottages, INC. | DB060621 | 2016-01-11 | Dissolved | WHITEWOOD |
| Black Hills Tiny Resort, LLC | DL216354 | 2021-12-13 | Active | RAPID CITY |
| BLACK HILLS TITANIUM JEWELRY, L.L.C. | DL006649 | 2003-12-15 | Dissolved | RAPID CITY |
| BLACK HILLS TITLE & ABSTRACT, INC. | DB049072 | 2004-12-27 | Inactive | SPEARFISH |
| Black HIlls Title, Inc. | DB025550 | 1986-07-07 | Active | STURGIS |
| BLACK HILLS TOOLS, LLC | DL022950 | 2010-11-19 | Active | PIEDMONT |
| Black Hills Tour Company, LLC | DL141060 | 2017-12-14 | Active | Rapid City |
| BLACK HILLS TOURMASTER, INC. | DB045487 | 2002-05-22 | Inactive | — |
| BLACK HILLS TOWERS, L.L.C. | DL003172 | 2000-08-09 | Active | Edgemont |
| Black Hills Towing LLC | DL200345 | 2021-04-07 | Active | Custer |
| BLACK HILLS TOWN & COUNTRY PROPERTIES, LLC | DL014169 | 2007-06-29 | Inactive | STURGIS |
| Black Hills Toy Drive | NS261490 | 2023-10-26 | Active | Rapid City |
| Black Hills Toy Museum, LLC | DL204440 | 2021-06-09 | Inactive | RAPID CITY |
| BLACK HILLS TRACTOR, INC. | DB046244 | 2002-12-23 | Inactive | — |
| Black Hills Trading and Supply, LLC | DL041127 | 2014-11-17 | Active | Mitchell |
| BLACK HILLS TRADING COMPANY INC | DB060850 | 2016-04-29 | Dissolved | WATERTOWN |
| Black Hills Trading Company LLC | DL255455 | 2023-07-26 | Dissolved | Spearfish |
| BLACK HILLS TRADING COMPANY, INC. | DB024290 | 1985-03-22 | Inactive | — |
| Black Hills Tradition, Inc. | NS232008 | 2022-08-04 | Dissolved | Rapid City |
| BLACK HILLS TRADITIONS, LLC | DL007334 | 2004-05-13 | Active | HILL CITY |
| BLACK HILLS TRAIL RIDE, INC. | NS000126 | 1959-02-27 | Dissolved | RAPID CITY |
| BLACK HILLS TRAILS | NS015095 | 2013-04-11 | Active | WHITEWOOD |
| BLACK HILLS TRAILS END CABINS AND MOTEL, INC. | DB051434 | 2006-08-11 | Dissolved | HILL CITY |
| BLACK HILLS TRAILS RESTORATION AND DEVELOPMENT, INC. | NS201166 | 2021-04-19 | Dissolved | Rapid City |
| BLACK HILLS TRAILSIDE RESORT, LLC | DL043877 | 2015-06-03 | Suspended | Hill City |
| BLACK HILLS TRANSFER, INC. | DB000275 | 1953-12-28 | Dissolved | — |
| Black Hills Transfer, Inc. | DB058995 | 2014-04-16 | Suspended | RAPID CITY |
| BLACK HILLS TRANSIT, INC. | RS005859 | — | Unknown | — |
| Black Hills Transit, Inc. | NS049164 | 2013-12-30 | Active | SPEARFISH |
| BLACK HILLS TRANSLOAD, LLC | DL012390 | 2006-10-30 | Dissolved | RAPID CITY |
| BLACK HILLS TRANSPORT, LLC | DL029651 | 2012-10-09 | Active | BELLE FOURCHE |
| BLACK HILLS TRANSPORTATION, INC. | DB047540 | 2003-11-18 | Inactive | SPEARFISH |
| BLACK HILLS TRAUMA THERAPY LLC | DL329377 | 2026-05-21 | Active | Custer |
| BLACK HILLS TREASURES, LLC | DL026306 | 2011-11-22 | Dissolved | DEAADWOOD |
| Black Hills Tree Service LLC | DL300006 | 2025-05-10 | Active | Spearfish |
| Black Hills Tree Service LLC | DL134828 | 2017-07-06 | Dissolved | Spearfish |
| BLACK HILLS TREE SERVICE, L.L.C. | DL003642 | 2001-03-20 | Inactive | — |
| Black Hills Treehouse Inc. | DB165694 | 2019-06-08 | Dissolved | Rapid City |
| Black Hills Trenching and Boring LLC | DL175434 | 2020-01-07 | Active | Spearfish |
| BLACK HILLS TRIBUNE INC. | DB023859 | 1984-12-23 | Inactive | — |
| BLACK HILLS TRIMLIGHT LLC | DL204252 | 2021-06-07 | Active | SUMMERSET |
| Black Hills Troubleshooting LLC | DL255768 | 2023-07-31 | Active | Sturgis |
| BLACK HILLS TRUCK & TRAILER, INC. | DB033750 | 1993-12-20 | Active | SIOUX FALLS |
| Black hills truck and auto L.L.C. | DL260919 | 2023-10-17 | Dissolved | Rapid City |
| BLACK HILLS TRUCKING CO. | DB011690 | 1973-05-29 | Dissolved | — |
| Black Hills Trucking Solutions LLC | DL314431 | 2025-11-24 | Active | Rapid City |
| BLACK HILLS TRUCKING, INC. D/B/A BHT TRUCKING | FB006142 | 1978-02-07 | Inactive | CASPER |
| BLACK HILLS TRUSS AND COMPONENTS, LLC | DL012561 | 2006-11-22 | Active | Columbus |
| Black Hills Trust Company, LLC | DL320699 | 2026-02-11 | Active | RAPID CITY |
| BLACK HILLS TUMOR INSTITUTE, INC. | NS006700 | 1979-04-09 | Inactive | — |
| BLACK HILLS TURKEY CALLS, LLC | DL028235 | 2012-05-17 | Dissolved | RAPID CITY |
| Black Hills Ultralights, LLC | DL140710 | 2017-12-07 | Active | Custer |
| BLACK HILLS ULTRASOUND, INC. | DB054618 | 2009-06-23 | Active | Rapid City |
| Black Hills Umpires Association LLC | DL323530 | 2026-03-18 | Active | Rapid City |
| Black Hills Undercoating L.L.C. | DL271746 | 2024-03-29 | Active | Black Hawk |
| BLACK HILLS UNITARIAN UNIVERSALIST FELLOWSHIP | NS013433 | 2007-05-24 | Active | RAPID CITY |
| Black Hills Untangled, LLC | DL173303 | 2019-11-20 | Dissolved | Rapid City |
| Black Hills Urban Greens LLC | DL228117 | 2022-06-01 | Active | Hot Springs |
| BLACK HILLS URETHANE CO., LLC | DL011370 | 2006-05-17 | Dissolved | SPEARFISH |
| BLACK HILLS URGENT CARE HOLDINGS, LLC | DL029210 | 2012-08-24 | Inactive | RAPID CITY |
| BLACK HILLS URGENT CARE, LLC | DL026941 | 2012-01-20 | Inactive | Rapid City |
| BLACK HILLS UROLOGY, P.C. | DB033359 | 1993-08-27 | Dissolved | RAPID CITY |
| BLACK HILLS USA TELECOMMUNICATIONS, INC. | DB031489 | 1992-03-03 | Inactive | — |
| BLACK HILLS UTILITY HOLDINGS, INC. | DB053681 | 2008-06-09 | Active | RAPID CITY |
| BLACK HILLS UTILITY HOLDINGS, INC. | DB052169 | 2007-03-22 | Inactive | — |
| BLACK HILLS UTV PERFORMANCE, LLC | DL257552 | 2023-08-28 | Active | Black Hawk |
| BLACK HILLS VACATION CABINS, LLC | DL014598 | 2007-09-04 | Active | LEAD |
| BLACK HILLS VACATION HOMES, INC. | DB046570 | 2003-03-10 | Dissolved | — |
| Black Hills Vacation Homes, LLC | DL137891 | 2017-10-03 | Dissolved | SPEARFISH |
| Black Hills Vacation Homes, LLC | DL215270 | 2021-11-29 | Inactive | Las Vegas |
| BLACK HILLS VACATION LODGING, LLC | DL021049 | 2010-03-22 | Dissolved | HILL CITY |
| Black Hills Vacation Rentals LLC | DL228788 | 2022-06-13 | Active | Rapid City |
| Black Hills Vacation Rentals LLC | DL137047 | 2017-09-13 | Inactive | Rapid City |
| Black Hills Valley LLC | DL330957 | 2026-06-11 | Active | BLACK HAWK |
| Black Hills Vapors, LLC | DL035781 | 2013-11-14 | Active | RAPID CITY |
| Black Hills Vending LLC | DL240728 | 2022-12-21 | Dissolved | Rapid City |
| BLACK HILLS VENTURE CAPITAL, INC. | DB027359 | 1988-05-11 | Inactive | — |
| Black Hills Ventures LLC | DL320431 | 2026-02-10 | Active | Rapid City |
| BLACK HILLS VENTURES, INC. | DB053372 | 2008-03-06 | Dissolved | RAPID CITY |
| Black Hills Veteran Ventures LLC | DL322033 | 2026-02-27 | Active | Rapid City |
| BLACK HILLS VICTORY RIDER ASSOCIATION | NS013623 | 2008-01-22 | Inactive | — |
| Black Hills Video Agency LLC | DL322159 | 2026-03-01 | Active | Keystone |
| BLACK HILLS VIDEO, L.L.C. | DL028305 | 2012-05-25 | Active | Rapid City |
| BLACK HILLS VINEYARD & WINERY, LLC | DL006281 | 2003-09-19 | Dissolved | Viborg |
| BLACK HILLS VINYL LLC | DL028806 | 2012-07-13 | Inactive | RAPID CITY |
| Black Hills VIP Glamping, LLC | DL250715 | 2023-05-12 | Suspended | RAPID CITY |
| BLACK HILLS VISION | NS012641 | 2004-09-03 | Dissolved | RAPID CITY |
| BLACK HILLS VISION CARE, PROF.L.L.C. | DL013311 | 2007-02-27 | Suspended | BELLE FOURCHE |
| BLACK HILLS VISITOR INFORMATION CENTER DEVELOPMENT CORPORATION | NS009576 | 1992-02-27 | Active | RAPID CITY |
| Black Hills Visual Media Group LLC | DL296965 | 2025-04-01 | Suspended | Rapid City |
| BLACK HILLS VOLKSSPORT ASSOCIATION | NS008289 | 1986-05-01 | Active | Sundance |
| Black Hills Wallet Company L.L.C. | DL162476 | 2019-03-31 | Inactive | North sioux city |
| Black Hills War Monument Association | NS214258 | 2021-11-10 | Active | RAPID CITY, SD |
| Black Hills Warehousing & Transportation, LLC | DL039659 | 2014-07-23 | Dissolved | LEAD |
| black hills warehousing llc | DL270121 | 2024-03-06 | Dissolved | summerset |
| Black Hills Water & Sewer Repair LLC | DL286007 | 2024-10-29 | Dissolved | Rapid City |
| BLACK HILLS WATER BEDS OF SIOUX FALLS, INC. | DB014329 | 1977-05-02 | Inactive | — |
| BLACK HILLS WATER COMPANY, L.L.C. | DL007156 | 2004-04-05 | Suspended | Deadwood |
| BLACK HILLS WATER DISTRIBUTION, L.L.C. | DL023322 | 2010-12-28 | Active | BELLE FOURCHE |
| BLACK HILLS WATER JET, L.L.C. | DL020281 | 2009-12-01 | Dissolved | RAPID CITY |
| BLACK HILLS WATER RANGERS ASSOCIATION | NS011252 | 1999-04-28 | Inactive | — |
| BLACK HILLS WATER SKI CLUB | NS004618 | 1961-08-11 | Inactive | — |
| BLACK HILLS WATER TREATMENT SERVICES, INC. | DB025122 | 1986-02-14 | Inactive | — |
| BLACK HILLS WATERBEDS OF SOUTH DAKOTA, INC. | DB036352 | 1995-10-20 | Inactive | — |
| BLACK HILLS WATERPROOFING, INC. | DB037429 | 1996-07-10 | Inactive | — |
| Black Hills Wedding Video LLC | DL263462 | 2023-11-30 | Active | Keystone |
| BLACK HILLS WEDDINGS AND RECEPTIONS, LLC | DL036041 | 2013-11-14 | Dissolved | LEAD |
| BLACK HILLS WEDDINGS, LLC | DL230392 | 2022-07-11 | Active | Rapid City |
| Black Hills Weed Management LLC | DL204086 | 2021-06-03 | Active | Hill City |
| Black Hills Welcome Box LLC | DL286361 | 2024-12-31 | Active | Rapid City |
| Black Hills Welding & Fab L.L.C | DL174065 | 2019-12-09 | Dissolved | Belle Fourche |
| Black Hills Welding LLC | DL308175 | 2025-08-29 | Active | Hot Springs |
| Black Hills Well Drilling LLC | DL272650 | 2024-04-11 | Dissolved | Custer |
| Black Hills Well Service LLC | DL317466 | 2026-01-07 | Active | Watertown |
| Black Hills Wellness Center, LLC | DL299502 | 2025-05-05 | Active | Spearfish |
| Black Hills Wellness LLC | DL266949 | 2024-01-23 | Dissolved | Rapid City |
| Black Hills Werx LLC | DL037839 | 2014-03-14 | Dissolved | STURGIS |
| Black Hills Western Arts Council | NS049815 | 2015-11-13 | Active | HOT SPRINGS |
| Black Hills WiFi Services, LLC | DL258091 | 2023-09-05 | Active | Custer |
| BLACK HILLS WILBERT VAULT COMPANY, INC. | DB030171 | 1991-01-10 | Dissolved | BLACK HAWK |
| BLACK HILLS WILBERT VAULT COMPANY, INC. | DB022595 | 1983-07-19 | Dissolved | — |
| BLACK HILLS WILD GAME RANCH, INC. | DB022219 | 1983-03-15 | Inactive | — |
| Black Hills Wild, LLC | DL197435 | 2021-02-25 | Active | Hot Springs |
| BLACK HILLS WILDERNESS SURVIVAL KITS LLC | DL017117 | 2008-08-07 | Inactive | BLACK HAWK |
| Black Hills Wildfire Planning, LLC | DL250510 | 2023-05-10 | Active | Lead |
| BLACK HILLS WINDOW CLEANING, INC. | DB028985 | 1989-12-20 | Active | Sioux Falls |
| BLACK HILLS WINDOWS & SIDING COMPANY | DB053300 | 2008-02-15 | Dissolved | BLACK HAWK |