| MOUNTAIN AIRE CITIZENS' BAND CLUB, INC. | 19660032ND | 1966-05-25 | Dissolved | — |
| MOUNTAIN AMERICA COMMUNICATIONS, INC. | DB021935 | 1981-11-22 | Dissolved | — |
| Mountain and Prairie Mustangs Collaboratives LLC | DL333758 | 2026-07-15 | Active | Hot Springs |
| MOUNTAIN BEARING AND SUPPLY, INC. | FB016144 | 1993-06-17 | Revoked | GILLETTE |
| Mountain Blueprint LLC | DL309490 | 2025-09-17 | Inactive | SANFORD |
| Mountain Bodywork and Massage LLC | DL295643 | 2025-03-17 | Dissolved | Rapid City |
| MOUNTAIN BREAD, INC. | DB039515 | 1998-01-08 | Inactive | — |
| MOUNTAIN CAPITAL GROUP, LLC | DL027147 | 2012-02-08 | Dissolved | DANA POINT |
| Mountain Cat Trading Company, LLC | DL149546 | 2018-06-12 | Active | Fairfield |
| MOUNTAIN CATS TRUST | NS012619 | 2004-08-09 | Dissolved | LEAD |
| MOUNTAIN COMMUNICATIONS, LLC | DL011001 | 2006-03-29 | Inactive | RAPID CITY |
| MOUNTAIN COMMUNICATIONS, LLC | DL023925 | 2011-02-28 | Inactive | RAPID CITY |
| MOUNTAIN COMPOSITES, INC. | DB031761 | 1992-05-15 | Inactive | — |
| Mountain Counseling LLC | DL217541 | 2021-12-31 | Inactive | Rapid City |
| MOUNTAIN CREATIVE HOLDINGS LLC | DL334406 | 2026-07-22 | Active | WATERTOWN |
| MOUNTAIN DROPS, INC. | DB047027 | 2003-06-24 | Dissolved | RAPID CITY |
| Mountain Dwellings LLC | DL312222 | 2025-10-24 | Active | Sioux Falls |
| MOUNTAIN EAGLE OUTPOST LLC | DL031195 | 2013-02-04 | Suspended | KEYSTONE |
| MOUNTAIN ENERGY, L.L.C. | DL018476 | 2009-03-13 | Active | RAPID CITY |
| MOUNTAIN FINANCIAL GROUP, INC. | FB035738 | 2012-02-03 | Inactive | BOISE |
| Mountain Flower Retirement Home LLC | DL219618 | 2022-01-31 | Active | Sturgis |
| Mountain Gate Resources, LLC | DL259828 | 2023-09-29 | Active | Rapid City |
| Mountain Goat LLC | DL320302 | 2026-02-09 | Active | Hot Springs |
| Mountain Goat Stone LLC | DL268828 | 2024-02-22 | Active | Sioux Falls |
| MOUNTAIN GOAT, INC. | DB051640 | 2006-10-23 | Inactive | — |
| MOUNTAIN GRANGE NO. 164, PATRONS OF HUSBANDRY | 19150005ND | 1915-07-06 | Suspended | — |
| MOUNTAIN HIGH, LIMITED | DB019040 | 1979-09-14 | Dissolved | MORGAN HILL |
| MOUNTAIN HOLDINGS OF SOUTH DAKOTA, INC. | DB049130 | 2005-01-05 | Dissolved | RAPID CITY |
| MOUNTAIN HOLDINGS, INC. | DB048760 | 2004-09-24 | Active | Madison |
| MOUNTAIN HOME, INC. | NS128089 | 2016-11-21 | Dissolved | RAPID CITY |
| MOUNTAIN INSURANCE CORPORATION | FB030657 | 2006-05-25 | Revoked | DENVER |
| MOUNTAIN INVESTORS LIMITED PARTNERSHIP | DP002024 | 2009-06-23 | Active | PIERRE |
| MOUNTAIN LAKE EXPRESS, INC. | DB057146 | 2012-09-04 | Dissolved | Sioux Falls |
| Mountain Light LLC | DL254637 | 2023-07-14 | Active | Sioux Falls |
| MOUNTAIN LION FOUNDATION | FN010908 | 2005-09-13 | Inactive | SACRAMENTO |
| MOUNTAIN LION FOUNDATION | FN011348 | 2012-10-29 | Inactive | Sacramento |
| Mountain Lion Photo Studios LLC | DL257491 | 2023-08-27 | Active | Hot Springs |
| Mountain Lion Properties LLC | DL334536 | 2026-07-23 | Active | Porcupine |
| Mountain Lion Trucking LLC | FL329797 | 2026-05-27 | Active | Lodi |
| Mountain Living LLC | DL249058 | 2023-04-20 | Inactive | Sioux Falls |
| MOUNTAIN LODGING CORPORATION | DB029355 | 1990-04-05 | Dissolved | BLACK HAWK |
| Mountain Majesty Holdings LLC | DL188705 | 2020-10-02 | Dissolved | Spearfish |
| Mountain Man Construction, LLC | DL220083 | 2022-02-07 | Active | Custer |
| MOUNTAIN MAN ENTERPRISES, LLC | DL029026 | 2012-08-06 | Dissolved | SIOUX FALLS |
| Mountain Man Hauling & Excavation LLC. | DL310045 | 2025-09-24 | Active | Belle Fourche |
| Mountain Man Metal Art, LLC | DL219204 | 2022-01-25 | Active | Belle Fourche |
| MOUNTAIN MAN OUTDOORS, LTD | DB059782 | 2015-01-26 | Dissolved | Rapid City |
| Mountain Man Rentals, LLC. | DL225537 | 2022-04-22 | Active | Custer |
| Mountain Man Tools LLC | DL270866 | 2024-03-16 | Dissolved | Hill City |
| Mountain Management Core, Inc. | DB156970 | 2018-11-29 | Dissolved | Rapid City |
| MOUNTAIN MANIA III, INC. | DB033589 | 1993-11-04 | Inactive | — |
| MOUNTAIN MANIA, INC. | DB031311 | 1992-01-07 | Inactive | — |
| MOUNTAIN MEADOW CABINS, LLC | DL009143 | 2005-05-04 | Dissolved | HILL CITY |
| Mountain Meadow Cemetery Association | NS206705 | 2021-07-19 | Active | Deadwood |
| Mountain Meadow Consulting LLC | DL194077 | 2021-01-05 | Dissolved | Deadwood |
| Mountain Meadow, LLC | DL187051 | 2020-09-01 | Active | DEADWOOD |
| MOUNTAIN MEADOWS LOG HOMES, LLC | DL006177 | 2003-08-18 | Inactive | — |
| MOUNTAIN MEDIA MOGULS, INC. | DB043089 | 2000-07-28 | Dissolved | — |
| MOUNTAIN MINING INC. | DB022480 | 1983-06-10 | Inactive | — |
| MOUNTAIN MONKEY CONSULTING LLC | DL245875 | 2023-03-07 | Active | Mitchell |
| MOUNTAIN MOTORS, INC. | DB040142 | 1998-06-08 | Inactive | — |
| Mountain Movement Chiropractic, P.C. | DB309621 | 2025-09-18 | Active | Spearfish |
| MOUNTAIN MOVER MINISTRIES | CH003108 | 1982-02-17 | Dissolved | WENTWORTH |
| MOUNTAIN MOVERS CONSTRUCTION, INC. | DB043636 | 2001-01-04 | Active | Belle Fourche |
| MOUNTAIN MOVERS TRANSPORT, LLC | DL028866 | 2012-07-19 | Dissolved | Whitewood |
| MOUNTAIN MOVERS/AINSWORTH-BENNING, LLC | DL013878 | 2007-05-10 | Active | Belle Fourche |
| Mountain Mulchers LLC | DL312119 | 2025-10-23 | Active | Superior |
| MOUNTAIN MUSIC SHOW, INC. | DB026275 | 1987-04-09 | Inactive | — |
| MOUNTAIN MUSTANG LLC | DL028500 | 2012-06-15 | Active | STURGIS |
| MOUNTAIN OF REVELATION | NS274420 | 2024-05-06 | Dissolved | Sioux Falls |
| MOUNTAIN OUTFITTERS INC | DB326311 | 2026-04-17 | Active | CUSTER |
| MOUNTAIN PARK, L.L.C. | DL021868 | 2010-07-02 | Active | CUSTER |
| MOUNTAIN PARTNERS, LLC | FL003315 | 2007-02-05 | Revoked | VERNON HILLS |
| MOUNTAIN PEAK DEVELOPMENT, LLC | FL001579 | 2003-05-01 | Revoked | FORT COLLINS |
| Mountain Peak LLC | DL267106 | 2024-01-25 | Active | Watertown |
| Mountain Peak Metalworks LLC | DL251373 | 2023-05-23 | Active | Rapid City |
| Mountain Peak Performance and Training, LLC | DL288697 | 2024-12-11 | Dissolved | Sioux Falls |
| MOUNTAIN PINE BEETLE SPECIALIST, LLC | DL026793 | 2012-01-06 | Inactive | SPEARFISH |
| Mountain Pine Management, LLC | DL018739 | 2009-04-20 | Dissolved | Loves Park |
| MOUNTAIN PINES CONSTRUCTION LLC | DL020582 | 2010-01-12 | Dissolved | STURGIS |
| MOUNTAIN PINES SUB ROAD DISTRICT | DM009650 | 2007-05-21 | Active | RAPID CITY |
| MOUNTAIN PLAINS 2 HOMEOWNERS ASSOCIATION | NS010704 | 1996-12-31 | Active | SPEARFISH |
| MOUNTAIN PLAINS AUDIOLOGY ASSOCIATES, INC. | DB031634 | 1992-04-06 | Inactive | — |
| MOUNTAIN PLAINS AUDIOLOGY, INC. | DB043743 | 2001-01-30 | Active | RAPID CITY |
| MOUNTAIN PLAINS BANK SPEARFISH, SOUTH DAKOTA | BK000155 | 1983-03-07 | Inactive | — |
| Mountain Plains Community Development Corporation | NS236228 | 2022-10-06 | Active | Sioux Falls |
| MOUNTAIN PLAINS EVALUATION, LLC | DL010165 | 2005-11-15 | Active | SALEM |
| MOUNTAIN PLAINS FLOORING & CONSTRUCTION LLC | DL023607 | 2011-01-24 | Dissolved | BELLE FOURCHE |
| MOUNTAIN PLAINS INVESTMENT FUNDS, INC. | DB022787 | 1983-10-07 | Inactive | — |
| MOUNTAIN PLAINS METAL STUD & DRYWALL LLC | DL007190 | 2004-04-13 | Dissolved | RAPID CITY |
| Mountain Plains Real Estate Holdings LLC | DL049407 | 2016-07-28 | Inactive | Rapid City |
| MOUNTAIN PLAINS REGION OPEN BIBLE CHURCHES | NS013534 | 2007-10-03 | Dissolved | RAPID CITY |
| MOUNTAIN PLAINS ROAD DISTRICT | DM009305 | 1986-08-11 | Active | — |
| MOUNTAIN PLAINS YOUTH SERVICES COALITION | NS006389 | 1977-12-19 | Active | BISMARCK |
| MOUNTAIN POWER CONSTRUCTION COMPANY, DBA MPC COMPANY | FB034964 | 2011-02-22 | Active | POST FALLS |
| MOUNTAIN PRODUCTS & SUPPLY, LLC | DL046296 | 2015-12-21 | Active | SPEARFISH |
| MOUNTAIN PROPERTIES, L.L.C. | DL011290 | 2006-05-05 | Active | Sioux Falls |
| MOUNTAIN RANCH AIR, INC. | DB038411 | 1997-04-04 | Active | Hill City |
| MOUNTAIN RANGE OIL AND GAS INCORPORATED | DB039696 | 1998-02-19 | Dissolved | Littleton |
| Mountain Real Estate LLC | DL184246 | 2020-07-09 | Dissolved | Hill City |
| MOUNTAIN RESORT CONDOMINIUMS | NS007298 | 1981-12-09 | Inactive | — |
| MOUNTAIN RIDGE INVESTMENT PROPERTIES, LLLP | DP002588 | 2013-07-05 | Active | MOBRIDGE |
| MOUNTAIN ROAD COMPANY, INC. | DB031538 | 1992-03-13 | Inactive | — |
| Mountain Runner Ventures LLC | DL299807 | 2025-05-07 | Active | Fort Collins |
| Mountain Sage Aviation LLC | DL226565 | 2022-05-07 | Active | Sioux Falls |
| Mountain Sage Village, Inc. | NS128523 | 2016-12-08 | Active | RAPID CITY |
| Mountain Shadow Auto Brokers LLC | DL251984 | 2023-06-01 | Dissolved | Piedmont |
| MOUNTAIN SHADOW ENTERPRISES, LLC | DL032143 | 2013-04-22 | Active | PIEDMONT |
| Mountain Shadow LLC | DL136039 | 2017-08-17 | Active | Rapid City |
| MOUNTAIN SHADOW RANCH ESTATES ROAD DISTRICT | DM009707 | 2009-05-12 | Active | STURGIS |
| MOUNTAIN SHADOW WATER COMPANY LLC | DL232539 | 2022-08-12 | Active | PIEDMONT |
| Mountain Shadows Estates, LLC | DL295878 | 2025-03-19 | Active | Rapid City |
| MOUNTAIN SHADOWS PROPERTIES, LLC | DL008073 | 2004-10-20 | Active | SPEARFISH |
| MOUNTAIN SHADOWS TOWNHOME OWNERS ASSOCIATION, INC. | NS007918 | 1984-08-13 | Active | RAPID CITY |
| Mountain Souvenirs Inc | DB164718 | 2019-05-16 | Dissolved | Hill City |
| MOUNTAIN SPORTS LLC | FL158645 | 2019-01-09 | Inactive | Meriden |
| MOUNTAIN SPORTS, INCORPORATED | DB014761 | 1977-10-21 | Inactive | — |
| MOUNTAIN SPRINGS APARTMENTS, LIMITED L.L.P. | DR000927 | 2005-06-24 | Active | RAPID CITY |
| Mountain State Financial Group, LLC | FL273530 | 2024-04-24 | Active | Westminster |
| MOUNTAIN STATES CONTAINER & EQUIPMENT COMPANY, INC. | DB029446 | 1990-05-01 | Inactive | — |
| MOUNTAIN STATES ENVIRONMENTAL TECH INC. | FB013502 | 1990-04-04 | Inactive | COLORADO SPRINGS |
| Mountain States Equity LLC | DL302952 | 2025-06-20 | Active | Watertown |
| Mountain States Finance LLC | DL313393 | 2025-11-11 | Active | Watertown |
| MOUNTAIN STATES LUMBER RECLAIMERS, L.L.C. | DL018482 | 2009-03-13 | Inactive | RAPID CITY |
| MOUNTAIN STATES MINERAL ENTERPRISES, INC. | FB006622 | 1979-05-10 | Revoked | TUCSON |
| MOUNTAIN STATES MORTGAGE CENTERS, INC. | FB022575 | 1999-05-24 | Inactive | SANDY |
| MOUNTAIN STATES MORTGAGE CENTERS, INC. | FB033634 | 2009-07-10 | Inactive | SANDY |
| Mountain States Quebec Lending LLC | DL313286 | 2025-11-10 | Active | Watertown |
| Mountain States Quebec Property LLC | DL313392 | 2025-11-11 | Active | Watertown |
| MOUNTAIN STATES ROOFING, INCORPORATED | FB027516 | 2003-07-24 | Inactive | GARDEN CITY |
| MOUNTAIN STATES SALES AND LEASING, INC. | DB027142 | 1988-02-24 | Inactive | — |
| MOUNTAIN STATES SECURITY, INC. | DB035708 | 1995-04-17 | Active | RAPID CITY |
| Mountain States Trucking LLC | DL303055 | 2025-06-23 | Active | Watertown |
| Mountain Stream Software LLC | DL290223 | 2025-01-03 | Active | Spearfish |
| Mountain Supply & Service LLC | FL156615 | 2018-11-20 | Active | Longview |
| MOUNTAIN TECH VIDEO, LLC | DL010138 | 2005-11-08 | Dissolved | SPEARFISH |
| Mountain Time Dog Co. LLC | DL297736 | 2025-04-10 | Active | BOX ELDER |
| Mountain Time Electric, LLC | DL193480 | 2020-12-23 | Dissolved | Custer |
| MOUNTAIN TIME, INC. | DB049008 | 2004-12-15 | Active | RAPID CITY |
| Mountain Time10, LLC | DL324954 | 2026-04-01 | Active | Rapid City |
| Mountain to Coast Compliance Consulting, LLC | DL174859 | 2019-10-31 | Inactive | LAS VEGAS |
| MOUNTAIN TOP ENTERPRISES, LLC | FL006979 | 2013-07-18 | Revoked | OKLAHOMA CITY |
| Mountain Top Homes LLC | DL312914 | 2025-11-04 | Active | Lead |
| MOUNTAIN TOP SERVICES, LLC | DL010132 | 2005-11-07 | Dissolved | Sturgis |
| Mountain Top Solutions L.L.C. | DL250106 | 2023-05-04 | Active | Sioux Falls |
| Mountain Top Toilets, Inc. | DB329294 | 2026-05-20 | Active | Hartford |
| MOUNTAIN TOWER & LAND, LLC | FL005448 | 2010-12-22 | Active | FORT MORGAN |
| MOUNTAIN TRAILS TRUCKING, LLC | DL004045 | 2001-09-06 | Inactive | RAPID CITY |
| Mountain Treats Hill City, LLC | DL049031 | 2016-06-24 | Dissolved | Custer |
| MOUNTAIN TREATS, LLC | DL019858 | 2009-09-30 | Dissolved | HILL CITY |
| MOUNTAIN VALLEY TRUCKING, INC. | DB053447 | 2008-03-27 | Inactive | — |
| MOUNTAIN VALLEY VISION CENTER LLC | DL026560 | 2011-12-15 | Active | Spearfish |
| MOUNTAIN VIEW APARTMENTS LIMITED PARTNERSHIP | DP001154 | 2000-02-28 | Active | — |
| MOUNTAIN VIEW BAPTIST CHURCH OF SPEARFISH, SOUTH DAKOTA | CH002939 | 1974-02-07 | Dissolved | SPEARFISH |
| Mountain View Builders, Inc. | FB039482 | 2016-08-02 | Revoked | CASPER |
| Mountain View Building, Inc. | FB201809 | 2021-04-27 | Active | Sheridan |
| MOUNTAIN VIEW CARE LLC | DL050579 | 2016-11-07 | Active | STURGIS |
| Mountain View Development Group, LLC | DL228047 | 2022-06-01 | Active | Whitewood |
| MOUNTAIN VIEW ENTERPRISES LLC | DL023362 | 2010-12-30 | Dissolved | VICTORIA |
| Mountain View Estates LLC | DL201167 | 2021-04-19 | Active | Hollywood |
| Mountain View Flats, LLC | DL259779 | 2023-09-29 | Active | Lead |
| Mountain View Funding, LLC | DL208136 | 2021-08-11 | Active | Cheyenne |
| MOUNTAIN VIEW HEIGHTS, INC. | DB044358 | 2001-07-23 | Dissolved | YANKTON |
| Mountain View Holdings, LLC | FL196184 | 2021-02-05 | Active | Billings |
| MOUNTAIN VIEW LLC | DL019501 | 2009-08-06 | Active | FORT PIERRE |
| Mountain View Lodge, LLC | DL205282 | 2021-06-24 | Suspended | Sioux Falls |
| MOUNTAIN VIEW LODGE, NO.144 I O O F | 19130011ND | 1913-09-10 | Dissolved | — |
| MOUNTAIN VIEW MARKETING, INC. | FB029676 | 2005-06-06 | Revoked | LINDON |
| Mountain View Medical LLC | DL049582 | 2016-08-12 | Dissolved | BERESFORD |
| MOUNTAIN VIEW MHC INVESTORS, L.L.C. | FL001588 | 2003-05-14 | Revoked | GOLD RIVER |
| MOUNTAIN VIEW MHC INVESTORS, LLC | FL003229 | 2006-12-01 | Inactive | GOLD RIVER |
| MOUNTAIN VIEW MORTGAGE, INC. | FB020775 | 1997-11-25 | Inactive | LA MESA |
| MOUNTAIN VIEW PARTNERS, LLC | DL029149 | 2012-08-20 | Dissolved | MADISON |
| MOUNTAIN VIEW RANCHES, LLC | DL006668 | 2003-12-17 | Active | RAPID CITY |
| Mountain View Rentals, LLC | DL039344 | 2014-06-25 | Dissolved | HERMOSA |
| MOUNTAIN VIEW ROAD DISTRICT | DM009312 | 1990-04-27 | Active | — |
| Mountain View SD Property Holdings, LLC | DL163514 | 2019-04-22 | Active | Skokie |
| Mountain View SD Skilled Nursing Facility, LLC | DL163411 | 2019-04-18 | Active | SKOKIE |
| Mountain View Two LLC | DL044776 | 2015-08-17 | Dissolved | FORT PIERRE |
| MOUNTAIN VIEW VENTURES 2011, LLC | DL024325 | 2011-04-08 | Dissolved | CHILLIWACK |
| Mountain View Ventures LLC | DL297947 | 2025-04-14 | Active | Whitewood |
| MOUNTAIN VILLA HOMEOWNERS ASSOCIATION | NS011685 | 2001-02-09 | Active | SIOUX FALLS |
| MOUNTAIN VILLA, LLC | DL002789 | 2000-02-14 | Inactive | — |
| Mountain Village, LLC | DL270136 | 2024-03-06 | Active | Spearfish |
| MOUNTAIN VISTA, L.L.P. | DR000635 | 2002-05-24 | Inactive | RAPID CITY |
| MOUNTAIN WATER COMPANY, INC. | DB031537 | 1992-03-13 | Inactive | — |
| Mountain Wellness Authority, LLC | DL217406 | 2021-12-30 | Active | Box Elder |
| Mountain West Aeronauts | NS305288 | 2025-07-23 | Active | custer |
| Mountain West Capital, LLC | DL299223 | 2025-05-01 | Active | Watertown |
| MOUNTAIN WEST DRIVERS CORP | FB032236 | 2007-12-07 | Active | OGDEN |
| MOUNTAIN WEST DRIVERS CORP. | FB027753 | 2003-09-30 | Revoked | OGDEN |
| MOUNTAIN WEST EXPRESS, INC. | DB036793 | 1996-02-01 | Inactive | — |
| MOUNTAIN WEST INSURANCE & FINANCIAL SERVICES, LLC | FL006141 | 2012-02-17 | Inactive | CRAIG |
| MOUNTAIN WEST INSURANCE & FINANCIAL SERVICES, LLC | FL043767 | 2015-09-08 | Active | Craig |
| MOUNTAIN WEST LLC | FL001778 | 2003-11-03 | Active | PIEDMONT |
| MOUNTAIN WEST MILLWORK INC. | FB015986 | 1993-04-12 | Active | HULETT |
| MOUNTAIN WEST REALTY CORP. | FB028019 | 2003-12-17 | Active | SALT LAKE CITY |
| Mountain West Select, LLC | DL050473 | 2016-10-28 | Inactive | WATERTOWN |
| MOUNTAIN WEST SIDING AND WINDOWS, INC. | FB032448 | 2008-02-29 | Revoked | FORT COLLINS |
| MOUNTAIN WEST WOUND CARE INC | FB276853 | 2024-06-13 | Inactive | Pierre |