| BLACK HILLS WIRELESS LLC | DL019099 | 2009-06-08 | Dissolved | CUSTER |
| Black Hills WM, LLC | DL153729 | 2018-09-11 | Active | RAPID CITY |
| BLACK HILLS WOMEN IN TIMBER | NS009470 | 1991-09-05 | Dissolved | SPEARFISH |
| Black Hills Wood Werx LLC | DL133752 | 2017-05-25 | Dissolved | Whitewood |
| BLACK HILLS WOODWORK PREFINISHING, INC. | DB048655 | 2004-08-24 | Dissolved | BLACK HAWK |
| Black Hills Working Dog Club | NS264983 | 2023-12-22 | Active | Spearfish |
| BLACK HILLS WORKING EQUITATION | NS245939 | 2023-03-08 | Active | White Owl |
| BLACK HILLS WORKS FOUNDATION, INC. | NS007424 | 1982-08-16 | Active | RAPID CITY |
| BLACK HILLS WORKS, INC. | NS005889 | 1975-10-23 | Active | RAPID CITY |
| Black Hills Wrestling Academy | NS184400 | 2020-07-13 | Active | Rapid City |
| Black Hills Wrestling, LLC | DL164065 | 2019-05-02 | Active | RAPID CITY |
| BLACK HILLS WYOMING, INC. | FB025111 | 2001-05-09 | Inactive | RAPID CITY |
| BLACK HILLS WYOMING, LLC | FL004647 | 2009-07-08 | Active | Rapid City |
| BLACK HILLS YARD AND GARDEN, LLC | DL012015 | 2006-08-29 | Dissolved | RAPID CITY |
| Black Hills Yard Game Rentals LLC. | DL305929 | 2025-07-30 | Active | Black Hawk |
| BLACK HILLS YOGA, INC. | DB056470 | 2011-11-29 | Dissolved | RAPID CITY |
| BLACK HILLS YOUTH FOOTBALL AND CHEER, INC. | DB055122 | 2010-02-02 | Dissolved | RAPID CITY |
| BLACK HILLS YOUTH FOR CHRIST | NS007299 | 1981-12-10 | Inactive | — |
| Black Hills Youth Orchestra | NS303410 | 2025-06-27 | Active | Piedmont |
| BLACK HILLS YOUTH RECREATIONAL CAMP INC. | NS005818 | 1975-07-14 | Inactive | — |
| Black Hills Youth Triathlon Inc. | NS267425 | 2024-01-30 | Active | Spearfish |
| Black Hills Youth Triathlon LLC | DL261269 | 2023-10-23 | Inactive | Spearfish |
| Black Hills Zen Garden LLC | DL272191 | 2024-04-04 | Inactive | Rapid City |
| BLACK HILLS ZOOLOGICAL SOCIETY | NS008055 | 1985-03-12 | Inactive | — |
| BLACK HILLS ZOOLOGICAL SOCIETY, INC. | NS012805 | 2005-03-31 | Inactive | — |
| BLACK HILLS, SOUTH DAKOTA CHAPTER OF THE NATIONAL ASSOCIATION OF WOMEN IN CONSTRUCTION | NS007137 | 1981-04-06 | Dissolved | — |
| Black Hole Resole LLC | DL299693 | 2025-07-01 | Active | Black Hawk |
| BLACK HORN PLUMBING LLC | DL146183 | 2018-03-30 | Inactive | PORCUPINE |
| Black Horse Brew L.L.C | DL259057 | 2023-09-19 | Active | Isabel |
| BLACK HORSE CREEK RANCH, L.L.C. | DL046382 | 2015-12-21 | Dissolved | RAPID CITY |
| BLACK HORSE LAND DEVELOPMENT LLC | DL255574 | 2023-07-28 | Active | Myrtle Beach |
| BLACK HORSE OUTFITTERS, LLC | DL005777 | 2003-04-17 | Suspended | MOBRIDGE |
| BLACK HORSE RANCH, INC. | DB143307 | 2018-01-30 | Active | — |
| Black Iris LLC | DL236626 | 2022-10-13 | Active | BERESFORD |
| Black Iron Builders LLC | DL327852 | 2026-05-05 | Active | Rapid City |
| Black Iron Drafting, LLC | DL048755 | 2016-06-06 | Active | Piedmont |
| Black Iron Railyard, LLC | DL144491 | 2018-02-26 | Dissolved | SIOUX FALLS |
| Black Joule, LLC | DL044812 | 2015-08-18 | Inactive | RAPID CITY |
| Black Kanyon, LLC | DL177153 | 2020-02-11 | Active | Lake Norden |
| Black Knight Capital, LLC | DL268928 | 2024-02-21 | Active | Sioux Falls |
| Black Knight Origination Technologies, LLC | FL191608 | 2020-11-20 | Revoked | Jacksonville |
| BLACK KNIGHT POOLS, SPAS, GAMES & THINGS, LLC | DL026519 | 2011-12-13 | Active | ABERDEEN |
| Black Knight Technologies, LLC | FL206665 | 2021-07-19 | Active | Jacksonville |
| BLACK LAB LLC | DL045266 | 2015-09-24 | Active | WINNER |
| Black Label Detailing LLC | DL325898 | 2026-04-13 | Active | Sioux Falls |
| Black Label Excavation and Hardscapes LLC | DL221806 | 2022-03-02 | Active | Rapid City |
| Black Label Excavation LLC | DL210813 | 2021-09-23 | Dissolved | Rapid City |
| Black Label Mobile Detailing LLC | DL301887 | 2025-06-06 | Active | Rapid City |
| BLACK LAMB FAMILY LIMITED PARTNERSHIP | DP001945 | 2008-10-30 | Active | NORTH SIOUX CITY |
| BLACK LINE CAPITAL II, INC. | DB050340 | 2005-11-29 | Dissolved | WATERTOWN |
| BLACK LINE CAPITAL, INC. | DB043293 | 2000-10-05 | Dissolved | WATERTOWN |
| BLACK LINE PROPERTIES, L.L.C. | DL006557 | 2003-11-26 | Dissolved | WATERTOWN |
| BLACK LINE SOURCING GROUP, INC. | DB050806 | 2006-03-08 | Dissolved | WATERTOWN |
| BLACK LINE STABLES, LLC | DL020299 | 2009-12-02 | Dissolved | WATERTOWN |
| BLACK LION, LLC | DL013897 | 2007-05-14 | Inactive | — |
| Black LOA, LLC | DL040822 | 2014-10-29 | Active | SIOUX FALLS |
| BLACK LOCUST ENTERPRISES INC | DB320660 | 2026-02-12 | Active | BELLE FOURCHE |
| Black Lotus Ventures, Inc. | DB142215 | 2018-01-06 | Dissolved | Madison |
| Black Magic Smoke Shop L.L.C | DL200245 | 2021-04-06 | Dissolved | Sioux Falls |
| Black Mars Corporation | DB295590 | 2025-03-16 | Active | Sioux Falls |
| BLACK MAVERICK LLC | DL017392 | 2008-09-22 | Dissolved | SIOUX FALLS |
| Black Mesa Advanced Fission, LLC | DL229764 | 2022-06-29 | Active | Evanston |
| Black Mesa Research + Consulting LLC | DL225213 | 2022-04-19 | Dissolved | LAKE WORTH |
| Black Mesa Transport, LLC | DL263412 | 2023-11-30 | Active | SELBY |
| Black Mile, LLC | DL228983 | 2022-06-15 | Active | Sioux Falls |
| BLACK MOON BISON LLC | DL227266 | 2022-05-18 | Suspended | BUFFALO |
| Black Moon Enterprises Inc. | DB058942 | 2014-04-03 | Dissolved | Sioux Falls |
| BLACK MOOSE LLC | DL025313 | 2011-07-28 | Dissolved | WAUBAY |
| Black Mountain Builders LLC | DL196577 | 2021-02-11 | Dissolved | Spearfish |
| BLACK MOUNTAIN BUILDERS, INC. | DB048316 | 2004-05-21 | Dissolved | RAPID CITY |
| Black Mountain Cleaners LLC | DL317875 | 2026-01-13 | Active | Spearfish |
| Black Mountain Consulting Inc. | DB233930 | 2022-09-02 | Dissolved | Sioux Falls |
| Black Mountain Estates LLC | DL288083 | 2024-12-02 | Dissolved | Rapid City |
| Black Mountain Financial, LLC | DL039406 | 2014-06-30 | Dissolved | MADISON |
| BLACK MOUNTAIN INVESTMENTS LLC | DL026697 | 2011-12-28 | Active | SPEARFISH |
| Black Mountain Painting, LLC | DL205196 | 2021-06-23 | Active | Spearfish |
| Black Mountain Plaza L.L.C | DL216657 | 2021-12-17 | Dissolved | Spearfish |
| Black Mountain Properties LLC | DL303444 | 2025-06-27 | Active | Sturgis |
| Black Mountain Property Management, LLC | DL241914 | 2023-01-10 | Active | Spearfish |
| BLACK MOUNTAIN RANCH, LLC | DL008512 | 2005-01-18 | Active | RAPID CITY |
| Black Mountain Real Estate, L.L.C. | DL181513 | 2020-05-13 | Active | DEADWOOD |
| Black Mountain Smoke CO. | DB218488 | 2022-01-15 | Dissolved | Spearfish |
| BLACK MOUNTAIN SOFTWARE LLC | FL231116 | 2022-07-21 | Active | Provo |
| BLACK MOUNTAIN SOFTWARE, INC. | FB038004 | 2014-08-04 | Inactive | POLSON |
| BLACK MOUNTAIN TRUCKING, INC. | DB057048 | 2012-07-18 | Dissolved | BOX ELDER |
| BLACK MOUNTAIN VENTURES, LLC | DL014810 | 2007-10-09 | Active | PIERRE |
| Black Night Ops, LLC | DL209877 | 2021-09-09 | Active | Miller |
| BLACK OAK CAPITAL, LLC | DL015423 | 1996-10-04 | Active | Oklahoma City |
| BLACK OAK HOLDINGS, LLC | DL015413 | 2007-12-31 | Inactive | OKLAHOMA CITY |
| BLACK OAK I, LLC | DL015420 | 2007-12-31 | Inactive | OKLAHOMA CITY |
| BLACK OAK II - J, LLC | DL015886 | 2008-02-28 | Dissolved | — |
| BLACK OAK II, LLC | DL015418 | 2007-12-31 | Inactive | OKLAHOMA CITY |
| BLACK OAK INVESTMENTS, LLC | DL015248 | 2007-12-12 | Active | Oklahoma City |
| BLACK OAK LEGACY, LLC | DL015415 | 2007-12-31 | Active | OKLAHOMA CITY |
| BLACK OAK LENDING, LLC | DL015431 | 2007-12-31 | Inactive | SIOUX FALLS |
| BLACK OAK PARTNERS, LLC | DL000983 | 1996-10-02 | Active | OKLAHOMA CITY |
| BLACK OAK REAL ESTATE GROUP, LLC | DL015430 | 2007-12-31 | Inactive | Oklahoma City |
| BLACK OAK REAL ESTATE I, LLC | DL015424 | 2007-12-31 | Active | OKLAHOMA CITY |
| BLACK OAK REAL ESTATE II, LLC | DL015425 | 2007-12-31 | Inactive | SIOUX FALLS |
| BLACK OAK REAL ESTATE II, LLC | DL024390 | 2011-04-18 | Inactive | SIOUX FALLS |
| Black Oak Ventures, LLC | DL174708 | 2019-12-20 | Active | Rapid City |
| Black Oak, LLC | DL191433 | 2020-11-18 | Active | LAKE NORDEN |
| Black Ops LLC | DL141567 | 2017-12-27 | Active | Sioux Falls |
| Black Panda Holdings, Inc. | DB195183 | 2021-01-22 | Dissolved | SIOUX FALLS |
| BLACK PEARL CAPITAL, LLC | DL027812 | 2012-04-09 | Dissolved | MADISON |
| BLACK PEARL ENTERPRISES, LLC | DL012092 | 2006-09-11 | Dissolved | — |
| Black Pearl Shipping Company, LLC | DL163643 | 2019-04-23 | Active | De Smet |
| BLACK PEARL, LLC | DL019412 | 2009-07-22 | Dissolved | SIOUX FALLS |
| BLACK PENN. RESOURCES, INC. | DB029105 | 1990-01-26 | Inactive | — |
| Black Petal Tulip LLC | DL329168 | 2026-05-19 | Active | Sioux Falls |
| Black Phoenix Custom, LLC | DL227913 | 2022-05-28 | Dissolved | Box Elder |
| Black Piano, LLC | DL042504 | 2015-03-18 | Active | SIOUX FALLS |
| Black Pine Capital LTD. | DL159128 | 2019-01-19 | Active | Sturgis |
| Black Pine Distillery, L.L.C. | DL037168 | 2014-01-24 | Dissolved | RAPID CITY |
| Black Pine Exteriors L.L.C. | DL227365 | 2022-05-19 | Dissolved | Rapid City |
| BLACK PINE INC. | DB236674 | 2022-10-14 | Active | JERSEY CITY |
| Black Pine Investments LLC | DL249186 | 2023-04-21 | Active | Deadwood |
| Black Pine Leather Co LC | DL224799 | 2022-04-12 | Active | Rapid City |
| Black Pines Investment LLC | DL300008 | 2025-05-11 | Suspended | Sturgis |
| Black Pines Marketing Company, LLC | DL254554 | 2023-07-13 | Dissolved | North Sioux City |
| Black platinum properties llc | DL179960 | 2020-04-15 | Suspended | Rapid City |
| BLACK POINT CORPORATION | 19340005D | 1934-12-28 | Active | — |
| Black Prince, LLC | DL280164 | 2024-07-31 | Active | Deadwood |
| Black Rabbit Construction Consulting LLC. | DL324493 | 2026-03-27 | Active | Sioux Falls |
| Black Rabbit Photography LLC | DL250221 | 2023-05-05 | Active | Okreek |
| Black Rhino Capital, Inc. | DB059714 | 2015-01-05 | Dissolved | MOUNTAIN VIEW |
| Black Rhino International Group Corp | DB283297 | 2024-09-18 | Active | Sioux Falls |
| Black Rhino LLC | DL181510 | 2020-05-13 | Dissolved | Huntington Station |
| Black Rhino Publishing LLC | DL257139 | 2023-08-22 | Active | Watertown |
| BLACK RHINO, INC. | DB053128 | 2008-01-02 | Dissolved | BROOKINGS |
| BLACK RIDGE PROPERTIES, LLC | DL035075 | 2013-09-10 | Dissolved | PIEDMONT |
| Black Ridge Realty LLC | DL317099 | 2026-01-04 | Active | Sturgis |
| Black Ridge Transport LLC | DL333344 | 2026-07-10 | Active | Rapid City |
| Black Rifle Fundraisers Inc | NS273043 | 2024-04-17 | Dissolved | Sioux Falls |
| Black River Energies, LLC | DL152529 | 2018-08-15 | Active | Las Vegas |
| BLACK RIVER EXPLORATION, LLC | FL006326 | 2012-05-24 | Revoked | CELINA |
| Black River Holdings, LLC | DL138919 | 2017-10-25 | Active | Lake Norden |
| Black River Inc. | DB186885 | 2020-08-30 | Active | Summerset |
| BLACK RIVER INVESTMENTS LLC | DL009931 | 2005-09-30 | Inactive | — |
| Black River Lodging LLC | DL211733 | 2021-10-06 | Active | Bismarck |
| Black River Management, LLC | DL218874 | 2022-01-20 | Active | Lake Norden |
| Black River Off-Market Fund, LLC | DL222048 | 2022-03-04 | Active | Lake Norden |
| BLACK RIVER PARK LLC | DL009843 | 2005-09-15 | Inactive | RAPID CITY |
| Black River RE, LLC | DL268006 | 2024-02-07 | Active | Summerset |
| Black River Targets LLC | DL146601 | 2018-04-09 | Active | RAPID CITY |
| BLACK ROCK COOPERATIVE ASSOCIATION | CO000855 | 1999-11-17 | Dissolved | — |
| Black Rock Group LLC | DL049518 | 2016-08-08 | Active | WATERTOWN |
| Black Rock Investments LLC | DL273194 | 2024-04-18 | Active | CHAMBERLAIN |
| Black Rock Partners LLC | DL201643 | 2021-04-26 | Dissolved | Sioux Falls |
| Black Rock PPLI LLC | DL248653 | 2023-04-13 | Active | Sioux Falls |
| Black Rocker LLC | DL269265 | 2024-02-26 | Active | Sturgis |
| Black Rooster Inc | DB190697 | 2020-11-04 | Active | Rapid City |
| Black Root LLC | DL258155 | 2023-09-06 | Dissolved | Watertown |
| Black Sand Capital Assets, LLC | DL257566 | 2023-08-28 | Active | Rapid City |
| Black Sand Joint Investment LLC | DL236249 | 2022-10-06 | Active | Sioux Falls |
| Black Shark, LLC | DL308483 | 2025-09-04 | Active | SIOUX FALLS |
| Black Sheep Agronomy, Inc. | DB233906 | 2022-09-02 | Active | Pierre |
| Black Sheep Airsoft LLC | DL324367 | 2026-03-26 | Active | Lead |
| Black Sheep Bar & Grill Inc. | DB310394 | 2025-09-30 | Active | yankton |
| Black Sheep Camping LLC | DL223609 | 2022-03-28 | Active | De Smet |
| BLACK SHEEP COFFEE STOP, L.L.C. | DL007650 | 2004-07-21 | Dissolved | — |
| Black Sheep Earthworx LLC | DL265768 | 2024-01-03 | Dissolved | New Underwood |
| Black Sheep Food Truck & Catering, LLC | DL149604 | 2018-06-13 | Dissolved | Lead |
| Black Sheep Group, LLC | DL019306 | 2009-07-07 | Active | Spearfish |
| Black Sheep Manufacturing LLC | DL223540 | 2022-03-25 | Active | Watertown |
| Black sheep trucking llc | DL161344 | 2019-03-06 | Dissolved | Custer |
| Black Sheep Ventures LLC. | DL271437 | 2024-03-24 | Active | Aberdeen |
| BLACK SHEEP, LLC | DL001962 | 1998-12-11 | Active | SPEARFISH |
| Black Sky LLC | DL334008 | 2026-07-17 | Active | Rapid City |
| Black Smoke Matters, Inc. | NS190960 | 2020-11-09 | Dissolved | WESSINGTON SPRINGS |
| Black Snow LLC | DL240462 | 2022-12-16 | Active | Sioux Falls |
| Black Space Global LLC | DL329274 | 2026-05-20 | Active | Sioux Falls |
| Black Spruce Land LLC | DL190549 | 2020-11-02 | Active | Sioux Falls |
| BLACK SPRUCE LLC | DL246402 | 2023-03-14 | Active | Rapid City |
| Black Spruce Studios LLC. | DL253976 | 2023-07-03 | Dissolved | Lead |
| Black Spur Properties LLC | DL266347 | 2024-01-13 | Active | Watertown |
| Black Squirrel Group LLC | DL267803 | 2024-02-04 | Active | Rapid City |
| Black Squirrel, LLC | DL185041 | 2020-07-24 | Active | SIOUX FALLS |
| BLACK STACK TRUCKING LLC | DL035015 | 2013-09-06 | Active | PIERRE |
| Black Star Asset Group, LLC | DL045392 | 2015-10-05 | Dissolved | MADISON |
| Black Star Research and Evaluation, LLC | DL172763 | 2019-11-08 | Dissolved | Martin |
| BLACK STAR, INC. | DB044601 | 2001-10-09 | Inactive | MADISON |
| BLACK STOCKING VENTURES, LLC | DL019563 | 2009-08-17 | Dissolved | SIOUX FALLS |
| Black Stone Builders LLC | DL214692 | 2021-11-17 | Dissolved | SPEARFISH |
| BLACK STONE MINERALS COMPANY, LIMITED PARTNERSHIP | FP000771 | 2010-12-08 | Active | HOUSTON |
| BLACK STONE NATURAL RESOURCES I, LIMITED PARTNERSHIP | FP000772 | 2010-12-09 | Inactive | HOUSTON |
| BLACK STONE NATURAL RESOURCES, L.L.C. | FL005498 | 2011-01-25 | Active | Houston |
| BLACK STRAP, INCORPORATED | FB034346 | 2010-05-17 | Active | NELIGH |
| BLACK STREAM CAPITAL, INC | FB031914 | 2007-08-16 | Revoked | FERNLEY |
| Black Stream LLC | DL218506 | 2022-01-14 | Active | Wellman |
| BLACK STUDIOS, INC. | DB050522 | 2006-01-03 | Dissolved | RUTLAND |
| BLACK SWAN ENTERPRISE, LLC | DL015296 | 2007-12-14 | Dissolved | — |
| Black Swan Enterprises LLC | DL236834 | 2022-10-17 | Dissolved | Sioux Falls |
| Black Swan Family Office Inc. | DB313972 | 2025-11-18 | Active | Sioux Falls |
| Black Swan Group LLC | DL278948 | 2024-07-16 | Active | Sioux Falls |
| Black Swan Properties LLC | DL280003 | 2024-07-30 | Active | Sioux Falls |
| BLACK SWAN SERVICES, INC. | DB055543 | 2010-08-11 | Active | Rapid City |
| Black T Bookkeeping LLC | DL155502 | 2018-10-24 | Dissolved | Brookings |
| BLACK THUNDER CORPORATION | DB047165 | 2003-07-29 | Inactive | — |
| Black Tie & Denim LLC | DL310146 | 2025-09-25 | Active | Sioux Falls |