| Black Cat Welding LTD. | DL238449 | 2022-11-11 | Dissolved | Sioux Falls |
| Black Cedar Star, Inc. | DB174557 | 2019-12-18 | Dissolved | Oelrichs |
| BLACK CIRCLE ENERGY, LLC | DL027607 | 2012-03-20 | Dissolved | RAPID CITY |
| Black Claw Bait & Tavern LLC | DL134826 | 2017-07-06 | Active | CLARK |
| Black Cloud LLC | DL224401 | 2022-04-07 | Active | Britton |
| Black Coast Creative Studio, LLC | DL217850 | 2022-01-05 | Active | Sturgis |
| Black Collar Auto LLC | DL313218 | 2025-11-08 | Active | Marion |
| Black Creek Asset Management Group, LLC | FL213360 | 2021-10-29 | Revoked | Rancho Cucamonga |
| Black Creek Integrated Systems Corp. | FB039667 | 2016-11-04 | Active | IRONDALE |
| Black Crow LLC | DL296573 | 2025-03-27 | Active | Ree Heights |
| Black Crown Group LLC | DL313672 | 2025-11-14 | Active | Huron |
| BLACK DIAMOND ADMINISTRATIVE COMPANY LLC | FL043844 | 2015-10-19 | Active | O'FALLON |
| Black Diamond Advisory, LLC | FL220303 | 2022-02-09 | Revoked | Golden |
| Black Diamond Appraisal & Consulting, Inc. | DB059197 | 2014-06-25 | Active | RAPID CITY |
| Black Diamond Asphalt, LLC | DL323240 | 2026-03-13 | Active | Spearfish |
| Black Diamond Builders LLC | DL205492 | 2021-06-28 | Active | Spearfish |
| BLACK DIAMOND CAPITAL LLC | DL032284 | 2013-05-01 | Active | Aberdeen |
| Black Diamond Companies LLC | DL174468 | 2019-12-17 | Dissolved | Sioux falls |
| Black Diamond Concrete LLC | DL247968 | 2023-04-04 | Dissolved | Chamberlain |
| BLACK DIAMOND CONSTRUCTION, INC. | DB056151 | 2011-05-17 | Dissolved | SPEARFISH |
| Black Diamond Contracting, LLC | DL243829 | 2023-02-06 | Suspended | WATERTOWN |
| Black Diamond Development, LLC | DL047703 | 2016-03-25 | Active | Sioux Falls |
| BLACK DIAMOND ENERGY SERVICES INC. | FB032915 | 2008-09-03 | Active | — |
| BLACK DIAMOND ENTERPRISES, LLC | DL009575 | 2005-07-22 | Dissolved | RAPID CITY |
| Black Diamond Foods, Ltd. | DL267470 | 2024-01-30 | Dissolved | RAPID CITY |
| Black Diamond Holdings Corp | DB208512 | 2021-08-17 | Dissolved | North Sioux City |
| Black Diamond Home Renovation Services LLC | DL259142 | 2023-09-19 | Dissolved | Sioux Falls |
| Black Diamond Homes LLC. | DL234896 | 2022-09-18 | Dissolved | Sioux Falls |
| Black Diamond HVACR Services LLC | DL238854 | 2022-11-17 | Dissolved | Box elder |
| Black Diamond Investments, LLC | DL318578 | 2026-01-20 | Active | Mandan |
| Black Diamond LLC | DL222501 | 2022-03-10 | Active | Deadwood |
| Black Diamond Lodge, LLC | DL139339 | 2017-11-03 | Active | Lead |
| Black Diamond Logistics of South Dakota, LLC | DL050055 | 2016-09-23 | Dissolved | NASHVILLE |
| Black Diamond Management LLC | DL309042 | 2025-09-11 | Active | Pierre |
| BLACK DIAMOND NETWORKS, INC. | FB030217 | 2005-12-16 | Inactive | Andover |
| BLACK DIAMOND NETWORKS, LLC | FL256760 | 2023-08-15 | Active | ANDOVER |
| BLACK DIAMOND PROPERTIES, L.L.C. | DL017850 | 2008-12-08 | Inactive | SIOUX FALLS |
| Black Diamond Ring, LLC | DL160488 | 2019-02-15 | Inactive | Whitewood |
| Black Diamond Roofing & Construction Inc | DB209990 | 2021-09-13 | Active | Richland |
| Black Diamond Roofing, LLC | DL249509 | 2023-04-26 | Active | Harrisburg |
| BLACK DIAMOND SEED COMPANY | DB037159 | 1996-05-01 | Inactive | — |
| BLACK DIAMOND TRANSPORT, INC. | DB164802 | 2019-05-17 | Suspended | Black Hawk |
| BLACK DIAMOND, INC. | DB024039 | 1984-12-27 | Inactive | — |
| Black Dirt LLC | DL155210 | 2018-10-16 | Active | Watertown |
| Black Dirt Vineyard LLC | DL161978 | 2019-03-20 | Suspended | Piedmont |
| Black Dog Building, LLC | DL160615 | 2019-02-20 | Dissolved | Sioux Falls |
| BLACK DOG CREEK, LLC | DL010497 | 2006-01-09 | Active | HAMILL |
| Black Dog Enterprises, LLC | DL152612 | 2018-08-16 | Dissolved | Pierre |
| BLACK DOG FARMS, LLC | DL010065 | 2005-10-27 | Active | RAPID CITY |
| Black Dog Guide Service LLC | DL285476 | 2024-10-21 | Active | Harrisburg |
| Black Dog Holdings LLC | FL289251 | 2024-12-18 | Revoked | Walton |
| BLACK DOG PROPERTIES, LLC | DL009808 | 2005-09-08 | Dissolved | SIOUX FALLS |
| BLACK DOG TRUCKING LLC. | DL017009 | 2008-07-23 | Dissolved | BALTIC |
| Black Dog, LLC | DL137827 | 2017-10-02 | Active | Harrisburg |
| Black Door Partners, LLC | DL131669 | 2017-03-20 | Active | SIOUX FALLS |
| Black Dove, LLC | DL324062 | 2026-03-23 | Active | Box Elder |
| Black Dragon Capital, LLC | DL133635 | 2017-05-22 | Dissolved | MADISON |
| Black Dragon Society Inc | DB254890 | 2023-07-20 | Dissolved | Rapid City |
| Black Drop Distillery llc | DL249108 | 2023-04-20 | Active | wakonda |
| Black Dymond Enterprises LLC | DL185292 | 2020-07-30 | Dissolved | Aberdeen |
| Black Eagle Construction LLC | DL239770 | 2022-12-06 | Dissolved | Vienna |
| BLACK EAGLE INVESTMENT COMPANY | DB035297 | 1995-01-17 | Inactive | — |
| BLACK EARTH, LLC | DL013225 | 2007-02-15 | Dissolved | Henderson |
| Black Elk Charitable Foundation, Inc. | NS157903 | 2018-12-21 | Dissolved | PORCUPINE |
| BLACK ELK CULTURAL HERITAGE, INC. | NS012426 | 2003-11-10 | Inactive | — |
| BLACK ELK DEVELOPMENT | NS015121 | 2013-05-24 | Dissolved | PORCUPINE |
| BLACK ELK FINANCIAL LLC | DL281413 | 2024-08-20 | Active | Spearfish |
| Black Elk Grille Llc | DL247774 | 2023-03-31 | Dissolved | Rapid city |
| BLACK ELK HERITAGE, INCORPORATED | NS010254 | 1995-01-26 | Inactive | — |
| Black Elk Legacy, LLC | DL155457 | 2018-10-23 | Active | Porcupine |
| Black Elk Limo LLC | DL298125 | 2025-04-16 | Active | Rapid City |
| Black Elk Peak Group Enterprises LLC | DL221123 | 2022-02-22 | Active | Hill City |
| Black Elk Peak Group INC. | DB209568 | 2021-09-02 | Dissolved | Hill City |
| Black Elk Resort LLC | DL188846 | 2020-10-05 | Dissolved | Rapid City |
| Black Elk, Inc. | DB215778 | 2021-12-06 | Active | Sioux Falls |
| BLACK EVENTS & ADVERTISING, INC. | DB050314 | 2005-11-14 | Dissolved | SIOUX FALLS |
| Black Events LLC | DL221048 | 2022-03-01 | Dissolved | SIOUX FALLS |
| Black Excellence Enterprises LLC | DL235358 | 2022-09-23 | Dissolved | SIOUX FALLS |
| Black Feather LLC | DL224157 | 2022-04-04 | Dissolved | Watertown |
| BLACK FINN FABRICS, INC. | DB022408 | 1983-05-17 | Inactive | — |
| BLACK FINN PLASTICS, INC. | DB022407 | 1983-05-17 | Inactive | — |
| BLACK FLAG LOGISTICS LLC | DL322019 | 2026-02-27 | Active | SIOUX FALLS |
| Black Flag Operator Training LLC | DL289588 | 2024-12-23 | Active | Spearfish |
| Black flag plumbing llc | DL229889 | 2022-07-01 | Active | Rapid City |
| Black Flag Studios LLC | DL240336 | 2022-12-15 | Dissolved | Sioux Falls |
| Black Flag Ventures LLC | DL291715 | 2025-01-24 | Active | Rapid City |
| Black Floor Partners, LLC | DL133038 | 2017-05-01 | Dissolved | Sioux Falls |
| Black Flower Ranch, LLC | DL278735 | 2024-07-12 | Active | RAPID CITY |
| Black Flyer Consulting, LLC | DL194462 | 2021-01-11 | Dissolved | Sioux Falls |
| Black Forest Anesthesia, PLLC | DL225575 | 2022-04-22 | Active | RAPID CITY |
| Black Forest Building LLC | DL213756 | 2021-11-04 | Active | Lead |
| BLACK FOREST DEVELOPMENT, INC. | DB010823 | 1971-11-23 | Inactive | — |
| BLACK FOREST INN BED & BREAKFAST LODGE, INC. | DB040088 | 1998-05-27 | Dissolved | Rapid City |
| BLACK FOREST INN, INC. | DB012266 | 1974-04-19 | Inactive | — |
| BLACK FOREST INN, L.L.C. | DL004228 | 2001-11-26 | Inactive | — |
| Black Forest LLC | DL247134 | 2023-03-23 | Active | Rapid City |
| Black Fox Properties, LLC | DL143115 | 2018-01-25 | Active | Butte |
| BLACK FOX RANCH, L.L.C. | DL009969 | 2005-10-07 | Inactive | — |
| BLACK FOX, INC. | DB025355 | 1985-05-01 | Active | Lead |
| Black Gambit, L.L.C. | DL041896 | 2015-01-12 | Active | Cibilo |
| Black Giraffe LLC | DL193561 | 2021-01-01 | Dissolved | Sioux Falls |
| BLACK GIRL CREATIVE CONCEPTS LLC | DL189500 | 2020-10-16 | Dissolved | New York |
| Black Gold Biochar LLC | DL129252 | 2017-01-02 | Active | Hermosa |
| Black Gold Espresso Sales and Service LLC | DL293981 | 2025-02-24 | Active | BELLE FOURCHE |
| Black Gold Mortgage, Inc. | FB238292 | 2022-11-09 | Revoked | Watertown |
| BLACK GOLD OIL PATCH SERVICES, L.L.C. | DL025785 | 2011-09-21 | Dissolved | RAPID CITY |
| BLACK GOLD OUTFITTERS, L.L.C. | DL009398 | 2005-06-16 | Inactive | — |
| Black Gold Trucking LLC | DL228939 | 2022-06-15 | Dissolved | Brookings |
| Black Gold, LLC | DL209064 | 2021-08-26 | Active | Owatonna |
| Black Granite Properties LLC | DL215733 | 2021-12-06 | Active | Rapid City |
| Black Hand Works LLC | DL214783 | 2021-11-18 | Dissolved | Rapid City |
| BLACK HAT SIOUX INDIAN FIRE FIGHTERS, INC. | NS008117 | 1985-06-06 | Inactive | — |
| Black Haus Creative, L.L.C | DL329022 | 2026-05-18 | Active | Rapid City |
| BLACK HAWK ANIMAL CLINIC, PC | DB051392 | 2006-08-01 | Dissolved | Black Hawk |
| BLACK HAWK BAR & GRILL LLC | DL037573 | 2014-02-24 | Active | BLACK HAWK |
| BLACK HAWK CHRISTIAN CENTER, INCORPORATED | CH003341 | 1992-12-10 | Inactive | — |
| BLACK HAWK CLASSICS LLC | DL278353 | 2024-07-08 | Active | Rapid city |
| BLACK HAWK CONSTRUCTION, INC. | DB039765 | 1998-03-11 | Inactive | — |
| Black Hawk Creek RV Park & Cabins, LLC | DL183663 | 2020-06-26 | Dissolved | RAPID CITY |
| Black Hawk Creek RV Park & Cabins, LLC | DL290521 | 2025-01-07 | Active | Rapid City |
| BLACK HAWK CUSTOM CUES, INC. | DB036015 | 1995-07-07 | Inactive | — |
| BLACK HAWK DISTRIBUTING, INC. | DB026768 | 1987-10-01 | Inactive | — |
| BLACK HAWK EXPRESS, INC. | DB040928 | 1999-01-05 | Dissolved | BLACK HAWK |
| BLACK HAWK FITNESS CENTER, L.L.C. | DL010146 | 2005-11-10 | Inactive | — |
| Black Hawk Hardware, LLC | FL291217 | 2025-01-16 | Active | Black Hawk |
| BLACK HAWK HOMEOWNERS SERVICE CO. #1 | NS006814 | 1979-10-30 | Inactive | — |
| BLACK HAWK LOUNGE AND CAFE, INC. | DB036350 | 1995-10-20 | Inactive | — |
| BLACK HAWK OFFICE SUPPLY, INC. | DB036048 | 1995-07-14 | Dissolved | — |
| Black Hawk Oil, Inc. | DB060338 | 2015-09-10 | Active | RAPID CITY |
| BLACK HAWK PLUMBING, HEATING & AIR CONDITIONING, INC. | DB029870 | 1990-09-27 | Dissolved | PIEDMONT |
| BLACK HAWK PROPERTIES, L.L.C. | DL002171 | 1999-03-30 | Active | RAPID CITY |
| BLACK HAWK RESOURCES CORPORATION | FB007702 | 1981-05-13 | Revoked | DENVER |
| BLACK HAWK ROAD COMMERCIAL ROAD DISTRICT | DM009819 | 2012-10-01 | Active | STURGIS |
| BLACK HAWK ROAD DISTRICT | DM009537 | 2003-09-11 | Active | STURGIS |
| BLACK HAWK SANITARY DISTRICT | SD000025 | 1993-01-07 | Active | — |
| BLACK HAWK TRUCKING INC. | DB043138 | 2000-08-17 | Dissolved | BLACK HAWK |
| BLACK HAWK VANS, INC. | DB052550 | 2007-07-05 | Dissolved | RAPID CITY |
| BLACK HAWK VOLUNTEER FIRE DEPARTMENT | NS000329 | 1960-10-24 | Active | BLACK HAWK |
| BLACK HAWK WATER COMPANY INC. | DB006065 | 1949-06-06 | Dissolved | — |
| BLACK HAWK WATER USER DISTRICT | WD000048 | 1996-04-03 | Active | — |
| Black Hawk Yardworks LLC | DL201105 | 2021-04-17 | Dissolved | Black Hawk |
| Black Heart Piercing Studio LLC | DL155832 | 2018-10-31 | Dissolved | Sioux Falls |
| Black Hill Dragway, LLC | DL046972 | 2016-02-04 | Dissolved | Sturgis |
| Black Hill Plains Investments,LLC | DL147880 | 2018-05-05 | Dissolved | Mitchell |
| Black Hill.Co, LLC | DL132536 | 2017-04-14 | Dissolved | HILL CITY |
| BLACK HILLS & WESTERN TOURS, INC. | DB005857 | 1967-05-18 | Dissolved | Rapid City |
| Black Hills (Ninth) District Medical Society | NS049471 | 2014-09-25 | Dissolved | — |
| BLACK HILLS 1031, LLC | DL013827 | 2007-05-04 | Dissolved | RAPID CITY |
| Black Hills 1875, Inc | DB181242 | 2020-05-08 | Active | Rapid City |
| Black Hills 2018, LLC | DL139057 | 2017-10-27 | Active | Hill City |
| Black Hills 3D Print Hub Cooperative | NS226860 | 2022-05-11 | Dissolved | Lead |
| BLACK HILLS 4-WHEELERS | NS001055 | 1966-09-16 | Active | RAPID CITY |
| Black Hills ABA, llc | DL185423 | 2020-08-02 | Dissolved | Maple Valley |
| Black Hills Above and Beyond Tours, LLC | DL129800 | 2017-01-18 | Active | STURGIS |
| BLACK HILLS ACCESSIBILITY, INC. | DB042241 | 1999-12-30 | Dissolved | RAPID CITY |
| Black Hills Accounting LLC | DL319755 | 2026-02-02 | Active | Belle Fourche |
| BLACK HILLS ACCURACY, LLC | DL014494 | 2007-08-20 | Dissolved | STURGIS |
| BLACK HILLS ACUPUNCTURE & ORIENTAL MEDICINE, LLC | DL017572 | 2008-10-22 | Dissolved | RAPID CITY |
| BLACK HILLS ADDITIVES, LLC | DL026130 | 2011-11-01 | Inactive | RAPID CITY |
| BLACK HILLS ADJUSTING, INC. | DB044178 | 2001-05-31 | Dissolved | RAPID CITY |
| Black Hills Advanced Hearing, LLC | DL191605 | 2020-11-20 | Dissolved | RAPID CITY |
| BLACK HILLS ADVENTURE GAMES, LTD. | DB030597 | 1991-04-26 | Inactive | — |
| Black Hills Adventure Lodging, LLC | DL043889 | 2015-06-01 | Active | LEAD |
| BLACK HILLS ADVENTURE RENTALS LLC | DL272288 | 2024-04-05 | Active | LEAD |
| Black Hills Adventure Tours Inc | DB158754 | 2019-01-11 | Active | Rapid Ciy, |
| BLACK HILLS ADVENTURE TOURS, L.L.C. | DL009649 | 2005-08-08 | Dissolved | RAPID CITY |
| BLACK HILLS ADVERTISING FEDERATION, INC. | NS007262 | 1981-10-05 | Active | Rapid City |
| Black Hills Advisors, LLC | DL049615 | 2016-08-17 | Active | RAPID CITY |
| Black Hills Advocate Chair Lift, Inc. | NS129221 | 2016-12-19 | Dissolved | RAPID CITY |
| Black Hills Advocate Chair Lift, LLC | DL050571 | 2016-11-07 | Inactive | RAPID CITY |
| Black Hills Advocate, LLC | DL042966 | 2015-03-26 | Active | Rapid City |
| BLACK HILLS AERIAL ADVENTURES, INC. | DB043863 | 2001-03-05 | Active | CUSTER |
| Black Hills Aerial Imagery, LLC | DL049821 | 2016-09-06 | Dissolved | BELLE FOURCHE |
| Black Hills Aerial Media, LLC | DL044164 | 2015-06-26 | Dissolved | RAPID CITY |
| Black Hills Aerial Solutions LLC | DL161000 | 2019-02-28 | Dissolved | Rapid city |
| BLACK HILLS AERIE #105 FRATERNAL ORDER OF EAGLES | NS004271 | 1908-03-07 | Dissolved | LEAD |
| BLACK HILLS AERO, INC. | DB038888 | 1997-08-04 | Dissolved | Spearfish |
| BLACK HILLS AGILITY CLUB, INC. | NS011643 | 2000-11-17 | Inactive | — |
| BLACK HILLS AGRICULTURAL EQUIPMENT INCORPORATED | DB054393 | 2009-03-23 | Dissolved | SPEARFISH |
| BLACK HILLS AI SERVICE, INC. | DB036696 | 1996-01-09 | Active | BELLE FOURCHE |
| BLACK HILLS AIDS PROJECT, INCORPORATED | NS009687 | 1992-08-10 | Inactive | — |
| BLACK HILLS AIKIKAI, INC. | DB039927 | 1998-04-13 | Inactive | — |
| Black Hills Air Bunker Adventures, LLC | DL134833 | 2017-07-06 | Dissolved | RAPID CITY |
| BLACK HILLS AIR COOPERATIVE INC | DB060215 | 2015-07-20 | Dissolved | SUMMERSET |
| BLACK HILLS AIRPLANES LLC | DL296910 | 2025-04-01 | Active | RAPID CITY |
| BLACK HILLS ALLIANCE | NS006678 | 1979-03-02 | Inactive | — |
| Black Hills Alternative LLC | DL328264 | 2026-05-08 | Active | Spearfish |
| BLACK HILLS AMATEUR BASEBALL, INC. | NS009479 | 1991-09-17 | Inactive | — |
| BLACK HILLS AMATEUR LEAGUE, INC. | NS013028 | 2006-01-20 | Active | RAPID CITY |
| BLACK HILLS AMATEUR RADIO CLUB | NS002729 | 1953-09-04 | Active | RAPID CITY |
| BLACK HILLS AMERICAN INDIAN CENTER | NS009213 | 1990-07-30 | Dissolved | RAPID CITY |
| BLACK HILLS AMMUNITION, INC. | DB027552 | 1988-07-15 | Active | RAPID CITY |
| BLACK HILLS AMPHITHEATER L.L.C. | DL019190 | 2009-06-19 | Inactive | SPEARFISH |
| Black Hills Analytics LLC | DL257822 | 2023-08-31 | Active | Rapid City |
| BLACK HILLS AND BADLANDS FOUNDATION, INC. | NS013590 | 2007-12-10 | Dissolved | RAPID CITY |
| Black Hills and Beyond LLC | DL216825 | 2022-01-04 | Active | Rapid City |
| BLACK HILLS AND FORT PIERRE RAILROAD ROUNDHOUSE, LLC | FL004271 | 2008-10-14 | Revoked | BROOKINGS |
| Black Hills Anesthesia L.L.C. | DL306775 | 2025-08-11 | Active | Rapid City |
| Black Hills Anesthesia, Prof. L.L.C. | DL271526 | 2024-03-26 | Active | Rapid City |
| Black Hills Animal Ally Foundation | NS050067 | 2012-04-16 | Active | LEAD |