| MARYHOUSE, INC. | NS000627 | 1963-07-25 | Inactive | — |
| MARYLAND CREEK RANCH BUILDERS, LLC | DL040817 | 2014-10-30 | Active | Silverthorne |
| MARYLAND CREEK RANCH, LLC | DL007533 | 2004-06-28 | Active | SIOUX FALLS |
| MARYLAND FINANCIAL SERVICES, INC. | FB024165 | 2000-08-03 | Revoked | BALTIMORE |
| Maryland Investment&Solutions LLC | DL332684 | 2026-07-02 | Active | Watertown |
| Maryland LLC | DL332729 | 2026-07-03 | Active | Sioux Falls |
| Marylike Dresses LLC | DL283249 | 2024-09-17 | Active | Rapid City |
| Marys Mixes LLC | DL327108 | 2026-05-04 | Active | — |
| Maryssa Nicklas LLC | FL209659 | 2021-09-06 | Revoked | Elbert |
| Maryville Consulting Group, Inc. | FB023625 | 2000-03-06 | Revoked | ST. LOUIS |
| MARYVILLE UNIVERSITY OF SAINT LOUIS | FN011364 | 2013-02-12 | Active | SAINT LOUIS |
| Marzahn Ag Service, Inc. | DB058178 | 2013-10-22 | Active | FRANKFORT |
| Marzano Research LLC | FL206783 | 2021-07-20 | Active | Watertown |
| Marzolf X- Kennels, LLC | DL041190 | 2014-11-24 | Active | Wentworth |
| MAS COMMUNICATIONS, INC. | DB030923 | 1991-09-04 | Dissolved | Pierre |
| MAS construction and general contractor llc | DL330908 | 2026-06-12 | Active | Hot springs |
| MAS Enterprises, LLC | DL048760 | 2016-06-06 | Active | Spearfish |
| MAS GROUP, LLC | DL022527 | 2010-09-30 | Dissolved | GATLINBURG |
| mas holdings ltd. | DL194449 | 2021-01-11 | Inactive | MIAMI |
| MAS LLC | DL014377 | 2007-07-30 | Active | BRANDON |
| MAS Marketing Real Estate, LLC | DL047805 | 2016-03-31 | Active | Omaha |
| MAS MARKETING, LLC | DL002998 | 2000-05-17 | Active | OMAHA |
| MAS MEDIA, INC. | DB054436 | 2009-04-13 | Inactive | VOLGA |
| Mas O Menos, LLC | DL171523 | 2019-10-12 | Active | Sioux Falls |
| MAS Production Resources LLC | DL035302 | 2013-09-30 | Dissolved | Sioux Falls |
| MAS VENTURES MANAGEMENT LLC | DL157871 | 2018-12-20 | Inactive | PIERRE |
| MAS+ NEXT GENERATION BEVERAGE CO. | FB274003 | 2024-04-30 | Active | CHICAGO |
| MAS-OIL INC. | DB020129 | 1980-10-28 | Dissolved | — |
| MAS-SEVIER LIMITED PARTNERSHIP | DP002132 | 2010-09-30 | Active | PIERRE |
| MAS-SHELBY LIMITED PARTNERSHIP | DP002133 | 2010-09-30 | Active | PIERRE |
| MASA INSURANCE SERVICES INC. | FB227813 | 2022-05-26 | Active | Sunrise |
| Masaba Leasing, Inc. | DB059407 | 2014-09-19 | Active | VERMILLION |
| MASABA, INC. | DB049597 | 2005-04-18 | Active | VERMILLION |
| MASALA HUT, INC. | DB056852 | 2012-04-27 | Dissolved | SIOUX FALLS |
| MASAN FOODS, INC. | DB054143 | 2008-12-22 | Inactive | MILBANK |
| MASARDIS CONGREGATIONAL CHURCH | 19260009N | 1926-09-22 | Active | — |
| MASAT CATTLE COMPANY, LLC | DL044637 | 2015-08-07 | Active | REDFIELD |
| Masat Farms, LLC | DL210550 | 2021-09-20 | Active | Redfield |
| Masat Forage Harvesting, LLC | DL261051 | 2023-10-19 | Active | Redfield |
| MASAT, INC. | DB055545 | 2010-08-12 | Active | REDFIELD |
| MASCHINO WOOD FLOORS, INC. | DB045965 | 2002-10-07 | Active | Hartford |
| MaSco 08, LLC | DL249819 | 2023-05-01 | Active | Sioux Falls |
| MASCO ACQUISITION, INC. | DB028141 | 1989-02-17 | Inactive | — |
| MASCO BUILDER CABINET GROUP, INC. | FB032210 | 2007-11-29 | Inactive | ANN ARBOR |
| MASCO. 00, LLC | DL013389 | 2007-03-09 | Active | Wagner |
| MASCO. 1, LLC | DL012814 | 2006-12-28 | Active | WAGNER |
| MASCO. 2, LLC | DL012817 | 2006-12-28 | Active | WAGNER |
| MASCO. 3, LLC | DL012816 | 2006-12-28 | Active | Wagner |
| MASCO. 4, LLC | DL012815 | 2006-12-28 | Active | WAGNER |
| MaSco. 5, LLC | DL220193 | 2022-02-08 | Active | Sioux Falls |
| MaSco. 6, LLC | DL212293 | 2021-10-14 | Active | Sioux Falls |
| MaSco. 7, LLC | DL220131 | 2022-02-07 | Active | Wagner |
| MASCOT FLASH DRIVES, LLC | DL024643 | 2011-05-11 | Active | Belle Fourche |
| MASERGY CLOUD COMMUNICATIONS, INC. | FB039212 | 2016-03-21 | Active | Philadelphia |
| MASERGY COMMUNICATIONS, INC. | FB025809 | 2001-12-21 | Active | Philadelphia |
| MASH LLC | DL241354 | 2023-02-01 | Suspended | Aberdeen |
| MASH Properties, LLC | DL210989 | 2021-09-27 | Active | Sioux Falls |
| MASH TRANSPORTATION, INC. | DB038361 | 1997-03-25 | Active | LAKE ANDES |
| MaSH Works LLC | DL178975 | 2020-03-19 | Dissolved | Pierre |
| MASHBURN EQUIPMENT, L.L.C. | FL005966 | 2011-11-18 | Inactive | Ringgold |
| Mashburn Property Services LLC | DL258678 | 2023-09-13 | Active | Watertown |
| Mashek Aviation LLC | DL191623 | 2020-11-21 | Dissolved | Crooks |
| MASHEK FOOD CENTER, INC. | DB056233 | 2011-07-07 | Active | HIGHMORE |
| Mashura LLC | FL043845 | 2015-10-19 | Active | SCOTTSDALE |
| MASJID ATTAKWA | NS013626 | 2008-01-28 | Dissolved | SIOUX FALLS |
| MASKELL PIPE & SUPPLY, INC. | FB037992 | 2014-07-31 | Inactive | FONTANA |
| Maskovich Consulting, LLC | DL143558 | 2018-02-05 | Dissolved | Pierre |
| Maskovich Management, LLC | DL275259 | 2024-05-18 | Suspended | Rapid City |
| MASLONKA & ASSOCIATES, INC. | FB026333 | 2002-06-10 | Revoked | PHOENIX |
| MASLONKA & ASSOCIATES, INC. | FB022992 | 1999-09-28 | Revoked | PHOENIZ |
| MASLOW INSURANCE AGENCY, LLC | FL003433 | 2007-04-09 | Revoked | OCALA |
| Mason & Morse Ranch Company LLC | FL232610 | 2022-09-01 | Active | Denver |
| MASON BROTHERS COMPANY | FB035603 | 2011-12-05 | Active | WADENA |
| Mason Buth Media LLC | DL274570 | 2024-05-10 | Active | Vermillion |
| MASON CITY CUISINE, INC. | DB055360 | 2010-05-24 | Dissolved | SIOUX FALLS |
| MASON CITY LODGING PARTNERS LLC | DL032842 | 2013-06-17 | Active | SIOUX FALLS |
| MASON CITY MOTEL DEVELOPMENT, INC. | DB055359 | 2010-05-24 | Dissolved | SIOUX FALLS |
| MASON CITY RENTALL, LLC | DL012059 | 2006-09-05 | Active | SIOUX FALLS |
| MASON CITY SUPER 8 MOTEL, INC. | DB039355 | 1997-12-16 | Active | ABERDEEN |
| Mason Construction LLC | DL257361 | 2023-09-01 | Active | Blackhawk |
| Mason Consulting LLC | DL282472 | 2024-09-05 | Dissolved | Sioux Falls |
| Mason Dixon of Florida LLC | DL202058 | 2021-04-30 | Dissolved | Port Charlotte |
| MASON DIXON, LLC | DL037836 | 2014-03-14 | Dissolved | SPEARFISH |
| MASON ECONOMY LODGING, L.L.C. | DL002916 | 2000-04-10 | Dissolved | — |
| Mason Endsley Music, LLC | DL289018 | 2025-01-01 | Active | Sioux Falls |
| MASON FINANCE INC. | FB143190 | 2018-01-28 | Revoked | San Francisco |
| Mason Jar Consulting LLC | DL138895 | 2017-10-24 | Dissolved | Dell Rapids |
| MASON LAND DEVELOPMENT, LLC | DL021570 | 2010-05-24 | Inactive | SIOUX FALLS |
| Mason Landscaping & Construction, LLC | DL288790 | 2024-12-12 | Active | Sioux Falls |
| Mason McDuffie Mortgage Corporation | FB227424 | 2022-05-20 | Active | San Ramon |
| MASON MILLS COMMUNITY CHURCH | 19610008N | 1961-07-21 | Dissolved | — |
| Mason Moir Photography LLC | DL161686 | 2019-03-13 | Inactive | Rapid City |
| Mason Movies LLC | DL263696 | 2023-12-04 | Active | Minneapolis |
| Mason Movies LLC | DL207467 | 2021-07-30 | Inactive | Sioux Falls |
| MASON ORTH SD, P.C. | DB054785 | 2009-09-10 | Dissolved | FARGO |
| Mason Properties, LLC | DL244561 | 2023-02-15 | Active | Sturgis |
| MASON RANCH, LLC | DA025398 | 2011-08-09 | Active | FAITH |
| MASON RANCH, LLC | DL025398 | — | Active | — |
| MASON SECURITY NETWORK, INC. | FB035533 | 2011-11-08 | Inactive | CORBIN |
| MASON TECHNOLOGIES INC. | FB036471 | 2013-01-07 | Active | DEER PARK |
| MASON TRANSPORTATION COMPANY, INC. | DB020057 | 1980-09-30 | Inactive | — |
| MASON'S 5TH AVENUE, INC. | DB051152 | 2006-05-25 | Dissolved | BELLE FOURCHE |
| MASON'S BUCKSTOP, LLC | DL144389 | 2018-02-23 | Suspended | Belle Fourche |
| MASON'S INCORPORATED | DB005664 | 1967-01-05 | Dissolved | — |
| MASON'S ON MAIN, LLC | DL008675 | 2005-02-14 | Inactive | — |
| Mason's Stairway, LLC | DL334372 | 2026-07-22 | Active | Rapid City |
| MASON-KNOX RANCH, INC. | DF000031 | 1989-11-06 | Active | FRANKFORT |
| MASON-MCBRIDE, INC. | FB013236 | 1989-12-08 | Inactive | TROY |
| MASONIC ASSOCIATION OF CARIBOU | 19430002ND | 1943-01-28 | Active | — |
| MASONIC ASSOCIATION OF FORT KENT, FORT KENT, MAINE | 19470018ND | 1947-04-21 | Suspended | — |
| MASONIC ASSOCIATION OF LIMESTONE | 19460026ND | 1946-11-21 | Dissolved | — |
| MASONIC BUILDING ASSOCIATION OF FARMINGTON MAINE | 18870001D | 1887-02-21 | Dissolved | — |
| MASONIC BUILDING ASSOCIATION OF HOWARD | NS005231 | 1913-04-30 | Inactive | — |
| MASONIC BUILDING ASSOCIATION OF LAKE ANDES, S.D. | NS001434 | 1946-05-01 | Inactive | — |
| MASONIC BUILDING ASSOCIATION OF PIERRE, SOUTH DAKOTA | NS001431 | 1916-11-21 | Active | PIERRE |
| MASONIC BUILDING ASSOCIATION OF SIOUX FALLS | NS001414 | 1901-12-05 | Active | SIOUX FALLS |
| MASONIC BUILDING ASSOCIATIONS OF BRIDGEWATER | NS000564 | 1938-06-23 | Dissolved | BRIDGEWATER |
| MASONIC BUILDING CORPORATION OF ABERDEEN | NS001983 | 1968-03-12 | Inactive | — |
| MASONIC BUILDING SOCIETY OF CHERRYFIELD | 19630019ND | 1963-02-26 | Suspended | — |
| MASONIC CEMETERY ASSOCIATION OF FORT PIERRE, SOUTH DAKOTA | NS002486 | 1935-05-20 | Active | FORT PIERRE |
| MASONIC CEMETERY ASSOCIATION OF LEAD, S.D. | NS001477 | 1932-03-12 | Active | LEAD |
| MASONIC CEMETERY ASSOCIATION OF PHILIP, SOUTH DAKOTA | NS007701 | 1938-01-03 | Active | PHILIP |
| MASONIC CENTER ASSOCIATION | DB008313 | 1930-03-31 | Dissolved | DEADWOOD |
| MASONIC CENTER ASSOCIATION | NS014600 | 2011-05-09 | Active | DEADWOOD |
| MASONIC CHARITIES OF BANGOR | 19270000ND | 1927-02-10 | Active | — |
| MASONIC TEMPLE ASSOCIATION | 19530038ND | 1953-11-12 | Dissolved | — |
| MASONIC TEMPLE ASSOCIATION (LEMMON) | DB006603 | 1916-11-25 | Dissolved | LEMMON |
| MASONIC TEMPLE ASSOCIATION OF ABERDEEN | NS000542 | 1896-04-20 | Active | ABERDEEN |
| MASONIC TEMPLE ASSOCIATION OF CANTON, S.D. | NS004327 | 1911-11-20 | Active | Canton |
| MASONIC TEMPLE ASSOCIATION OF ELLSWORTH | 19310008ND | 1931-10-05 | Active | — |
| MASONIC TEMPLE ASSOCIATION OF MILLER, SOUTH DAKOTA | DB004162 | 1949-08-02 | Dissolved | MILLER |
| MASONIC TEMPLE CORP. | 19610017ND | 1961-03-27 | Active | — |
| MASONIC TRUSTEES OF FAIRFIELD MAINE | 18990004D | 1899-10-12 | Suspended | — |
| MASONIC TRUSTEES OF PORTLAND | 18670000ND | 1867-02-21 | Active | — |
| Masonry and Construction Trades Academy | NS283626 | 2024-09-23 | Active | Rapid City |
| MASONRY BUILDERS, INC. | DB041095 | 1999-02-17 | Inactive | — |
| MASONRY COMPONENTS, INC. | DB012640 | 1974-12-13 | Active | YANKTON |
| MASONRY IV, INC. | FB028925 | 2004-09-13 | Inactive | DARDANELLE |
| MASONRY, INC. (SIOUX FALLS) | DB004021 | 1965-03-15 | Active | Sioux Falls |
| MASONS ON MAIN, INC. | DB037086 | 1996-04-15 | Inactive | — |
| MASONTROYDOREEN INC. | DB045163 | 2002-03-01 | Inactive | — |
| MASQUERADE & MYSTERY CO. | DB049782 | 2005-05-31 | Inactive | — |
| Masri SD, LLC | DL286948 | 2024-11-13 | Active | Pierre |
| MASS BENEFITS CONSULTANTS, INC. | FB028027 | 2003-12-18 | Active | Annandale |
| Mass Capital International LLC | DL181621 | 2020-05-15 | Active | Sioux Falls |
| MASS DESIGN GROUP, LTD | FN273325 | 2024-04-22 | Active | Boston |
| MASS FINANCIAL GROUP, INC. | DB022750 | 1983-09-23 | Inactive | — |
| MASS KEY MARKETING, INC. | DB050795 | 2006-03-02 | Inactive | — |
| Mass Torque Performance LLC | DL324557 | 2026-03-29 | Active | Brookings |
| MASSA DENTAL OFFICES, P.C. | DB041236 | 1999-04-01 | Active | HOT SPRINGS |
| MASSA MULTIMEDIA ARCHITECTURE, P.C. | FB163519 | 2019-04-22 | Active | Neptune |
| MASSA NEXUS, INC. | DB272184 | 2024-04-04 | Dissolved | SIOUX FALLS |
| MASSA-BERRY PROFESSIONAL ASSOCIATION | DB009911 | 1969-12-12 | Dissolved | STURGIS |
| MASSACHUSETTS BENEFIT ADMINISTRATORS LLC | FL006114 | 2012-02-01 | Active | BOSTON |
| Massachusetts Educational Financing Authority | FN206863 | 2021-07-20 | Active | Boston |
| MASSACHUSETTS UNCLE SAM ELECTRIC LIGHT AND BATTERY COMPANY | 18870008D | 1887-04-18 | Canceled | — |
| Massage & Bodywork Co. LLC | DL228494 | 2022-06-07 | Active | Sioux Falls |
| Massage 360, LLC | DL132008 | 2017-04-17 | Active | Sioux Falls |
| Massage 4 U 1, LLC | DL182778 | 2020-06-09 | Active | Rapid City |
| Massage and Bodywork by Marv, LLC | DL036888 | 2014-01-14 | Active | RAPID CITY |
| Massage By Allie LLC | DL322737 | 2026-03-09 | Active | Renner |
| Massage by Bre, LLC | DL173002 | 2019-11-13 | Active | LAKE NORDEN |
| MASSAGE BY DAWN, LLC | DL011048 | 2006-04-04 | Inactive | MADISON |
| Massage by Holly LLC | DL232894 | 2022-08-18 | Dissolved | Sioux Falls |
| MASSAGE BY KAYLA, LLC | DL015383 | 2007-12-24 | Inactive | — |
| Massage by Kelsey, LLC | DL218248 | 2022-01-10 | Active | WATERTOWN |
| Massage By Matt LLC | DL204598 | 2021-07-01 | Active | Sioux Falls |
| Massage by Sarah, LLC | DL183502 | 2020-06-23 | Active | Aberdeen |
| Massage by Sherry LLC | DL218087 | 2022-01-09 | Active | Beresford |
| Massage Chair Gallery LLC | DL222123 | 2022-05-01 | Active | Sioux Falls |
| Massage Doctor LLC | DL141142 | 2017-12-16 | Dissolved | Sioux Falls |
| Massage Health LLC | DL044740 | 2015-08-17 | Active | Chamberlain |
| MASSAGE MASTER, L.L.C. | DL001607 | 1998-03-27 | Dissolved | — |
| Massage RX, LLC | DL282164 | 2024-09-02 | Active | VERMILLION |
| MASSAGE SPA AND RELAXATION, LLC | DL036115 | 2013-11-25 | Active | SIOUX FALLS |
| Massage Therapy Aberdeen, LLC | DL130188 | 2017-01-31 | Active | Aberdeen |
| MASSAGE THERAPY ASSOCIATION OF SOUTH DAKOTA, INC. | NS013416 | 2007-04-30 | Inactive | — |
| MASSAGE THERAPY BY BARBEEE, L.L.C. | DL025409 | 2011-08-10 | Active | BRANDON |
| MASSAGE THERAPY, INC. | DB026977 | 1987-12-23 | Inactive | — |
| MASSAGE THERAPY, INC. | DB021114 | 1981-11-16 | Inactive | — |
| MASSAGE THERAPY, LLC | DL019634 | 2009-08-28 | Dissolved | Wentworth |
| Massage with Molly, L.L.C. | DL186921 | 2020-08-31 | Active | Rapid City |
| MassageMeJen, LLC | DL216992 | 2021-12-22 | Dissolved | Sioux Falls |
| Massages by Marlaina LLC | DL229688 | 2022-06-28 | Active | Webster |
| MassaNotMassa Productions, LLC | DL224995 | 2022-04-14 | Active | — |
| MASSAT PROPERTIES, LLC | DL017408 | 2008-09-24 | Inactive | HOT SPRINGS |
| Massawa Logistics LLC | DL215251 | 2021-11-29 | Dissolved | Sioux falls |
| MASSDRIVE INSURANCE GROUP, LLC | FL043048 | 2014-10-17 | Active | BOSTON |
| Masselink Law Office, Prof. L.L.C. | DL162893 | 2019-04-08 | Dissolved | Sioux Falls |
| Massenomics Gym LLC | DL047622 | 2016-03-21 | Active | ABERDEEN |
| Massenomics, LLC | DL047754 | 2016-03-28 | Active | ABERDEEN |
| MASSEY CONSTRUCTION, INC. | DB042934 | 2000-06-19 | Active | OLIVET |
| Massey Contracting LLC | DL269445 | 2024-02-27 | Active | Olivet |
| Massey Excavation LLC | DL241895 | 2023-01-10 | Active | Rapid City |
| MASSEY LUMBER COMPANY | DB006695 | 1949-11-26 | Dissolved | — |
| MASSEY-FERGUSON INC. | FB000645 | 1928-03-19 | Revoked | DES MOINES |
| MASSEY-FERGUSON INC. | 19520007F | 1952-12-12 | Revoked | — |
| MASSILLON SUPER 8 MOTEL, INC. | DB027649 | 1988-08-25 | Dissolved | — |
| Massimo Marine, LLC | FL268921 | 2024-02-20 | Revoked | GARLAND |
| MASSIMO MOTOR SPORTS LLC | FL191229 | 2020-11-13 | Active | Garland |