| T, K & J, L.L.C. | — | DL016618 | 2008-06-02 | Inactive | CUSTER |
| T, M & C, INC. | — | DB024650 | 1985-08-23 | Dissolved | ABERDEEN |
| T- Rex Plumbing LLP | — | DR202547 | 2021-05-07 | Active | MITCHELL |
| T-4 Rentals, LLC | — | FL310236 | 2025-09-26 | Active | GILLETTE |
| T-4, LLC | — | DA030058 | 2012-11-15 | Active | JEFFERSON |
| T-B ENTERPRISES, INC. | — | DB041312 | 1999-04-19 | Inactive | — |
| T-BAR FOUR, LLLP | — | DP002404 | 2012-09-04 | Active | WOOD |
| T-BAR INVESTING, LLC | — | DL043787 | 2015-05-21 | Dissolved | WENTWORTH |
| T-BAR-D EXPRESS, LLC | — | DL025543 | 2011-08-29 | Inactive | CANTON |
| T-Bar-T Cattle Co., LLC | — | DL172456 | 2019-11-01 | Active | Lake Park |
| T-BARR INNOVATIONS, L.L.C. | — | DL013384 | 2007-03-09 | Inactive | — |
| T-Bird Express LLC | — | DL263055 | 2023-11-22 | Active | Erwin |
| T-BIRDS, INC. | — | DB028501 | 1989-06-22 | Inactive | — |
| T-Blom Trucking, LLC | — | DL304666 | 2025-07-15 | Active | Corsica |
| T-Bob Investment Holdings LLC | — | DL035915 | 2013-11-12 | Active | STURGIS |
| T-Bone Construction, Inc. | — | FB136938 | 2017-09-13 | Revoked | Colorado Springs |
| T-BONES TREE HOUSE, LLP | — | DR000834 | 2004-08-27 | Inactive | WINNER |
| T-BOY INCORPORATED | — | DB023596 | 1984-07-16 | Inactive | — |
| T-BROTHERS LOGISTICS, L.L.C. | — | DL001373 | 1997-09-15 | Active | SIOUX FALLS |
| T-BROTHERS TRADING, LLC | — | DL018879 | 2009-05-08 | Dissolved | SIOUX FALLS |
| T-BROTHERS TRUCKING, L.L.C. | — | DL002774 | 2000-02-03 | Active | SIOUX FALLS |
| T-C Oil Company, LLC | — | FL043229 | 2015-01-22 | Inactive | Refugio |
| T-Cal Enterprises LLC | — | DL049467 | 2016-08-03 | Dissolved | Huron |
| T-Cell Wireless LLC | — | DL128633 | 2016-12-14 | Dissolved | Sioux Falls |
| T-Dragon LLC | — | DL133849 | 2017-05-31 | Dissolved | Sioux Falls |
| T-Force Health: Mind and Body PC | — | DB245296 | 2023-02-27 | Active | Watertown |
| T-fun INC | — | DB300134 | 2025-05-13 | Active | Watertown |
| T-GUN CONSTRUCTION INC. | — | DB052966 | 2007-11-26 | Dissolved | RAPID CITY |
| T-I Excavation Rock Cutting and Septic Tanks LLC | — | DL227971 | 2022-05-31 | Dissolved | Hot Springs |
| T-J Fencing LLC | — | DL177005 | 2020-02-07 | Active | Buffalo |
| T-J VENTURES L.L.C. | — | DL005582 | 2003-02-26 | Inactive | — |
| T-JAM SOLUTIONS LLC | — | DL258145 | 2023-09-06 | Active | Rapid City |
| T-Juanita Street Food and Cheladas LLC | — | DL223448 | 2022-03-24 | Dissolved | Sioux Falls |
| T-K CORPORATION, INC. | — | DB022204 | 1983-03-09 | Dissolved | Watertown |
| T-L CREDIT CORPORATION | — | FB009586 | 1984-05-23 | Inactive | HASTINGS |
| T-L IRRIGATION CO. | — | FB005330 | 1976-04-27 | Active | HASTINGS |
| T-L REALTY, LLC | — | DL006682 | 2003-12-19 | Dissolved | BURKE |
| T-L, LLC | — | DL016337 | 2008-04-28 | Inactive | NEWELL |
| T-LAKOTA ACRES, INC. | — | DF032743 | 1993-03-02 | Active | MANSFIELD |
| T-M CONCRETE CONSTRUCTION, INC. | — | DB040909 | 1999-01-04 | Dissolved | RAPID CITY |
| T-M HOLDINGS, LLC | — | DL010230 | 2005-11-29 | Active | Rapid City |
| T-MAK LLC | — | DL029360 | 2012-09-10 | Inactive | LEAD |
| T-Man Farms, LLC | — | DL241099 | 2022-12-28 | Active | COLOME |
| T-MOBILE CENTRAL LLC | — | FL002697 | 2005-12-19 | Active | BELLEVUE |
| T-MOBILE FINANCIAL LLC | — | FL042970 | 2014-09-10 | Active | BELLEVUE |
| T-MOBILE LEASING LLC | — | FL043788 | 2015-09-23 | Active | BELLEVUE |
| T-MOBILE RESOURCES CORPORATION | — | FB026053 | 2002-03-14 | Inactive | BELLEVUE |
| T-MOBILE RESOURCES LLC | — | FL203126 | 2021-05-18 | Active | Bellevue |
| T-MOBILE USA TOWER LLC | — | FL006553 | 2012-10-29 | Active | BELLEVUE |
| T-n-C Properties LLC | — | DL230456 | 2022-07-12 | Active | Pierre |
| T-N-C, INC. | — | DB056745 | 2012-03-16 | Active | Pierre |
| T-N-D Brokerage LLC | — | DL143843 | 2018-02-13 | Dissolved | Hurley |
| T-N-D TRUCKING L.L.C. | — | DL032757 | 2013-06-10 | Inactive | Hurley |
| T-N-D, INC. | — | DB025246 | 1986-03-25 | Dissolved | — |
| T-N-T AUTO SALES, INC. | — | DB047778 | 2004-01-12 | Inactive | — |
| T-N-T AUTO SALVAGE, LLC | — | DL006395 | 2003-10-15 | Active | DE SMET |
| T-N-T Event and Marketing Management, LLC | — | DL144336 | 2018-02-22 | Active | Hermosa |
| T-N-T General Contractors LLC | — | DL048611 | 2016-05-23 | Dissolved | Hermosa |
| T-n-T Inc. | — | DB135215 | 2017-07-21 | Dissolved | Newell |
| T-N-T TRAILER RENTALS LLC | — | DL031138 | 2013-01-30 | Active | Emery |
| T-NETIX INTERNET SERVICES, INC. | — | FB023844 | 2000-05-03 | Inactive | CARROLLTON |
| T-NETIX TELECOMMUNICATIONS SERVICES, INC. | — | FB024088 | 2000-07-13 | Inactive | DALLAS |
| T-NETIX, INC. | — | FB026758 | 2002-11-13 | Inactive | DALLAS |
| T-NETIX, INC. | — | FB015444 | 1992-08-11 | Inactive | ENGLEWOOD |
| T-O Engineers, Inc., Professional Corporation | — | FB195621 | 2021-01-28 | Inactive | Meridian |
| T-O ENGINEERS, LLC | — | FL246109 | 2023-03-09 | Inactive | TAMPA |
| T-Pod Tech Service LLC | — | DL208889 | 2021-08-24 | Active | Akron |
| T-R MIDLANDS COMPANY | — | DB039039 | 1997-09-16 | Inactive | — |
| T-Rad Prof. LLC | — | DL248888 | 2023-04-18 | Active | Ethan |
| T-Rav's Electric LLC | — | DL241371 | 2023-01-03 | Dissolved | Sandy |
| T-Ray's Bar and Grill, LLC | — | DL042167 | 2015-02-18 | Inactive | ROSLYN |
| T-REX Construction, LLC | — | DL049695 | 2016-08-25 | Dissolved | MIRCHELL |
| T-REX Enterprises, LLC | — | DL288758 | 2024-12-11 | Dissolved | Sioux Falls |
| T-REX INVESTMENTS II, LLC | — | DL042429 | 2015-02-23 | Dissolved | RAPID CITY |
| T-Rex Joe's Woodworking LLC | — | DL229647 | 2022-06-28 | Active | Rapid City |
| T-Rex Plumbing LLC | — | DL259180 | 2021-05-07 | Active | Mitchell |
| T-REX REAL ESTATE, LLC | — | DL001909 | 1998-10-26 | Inactive | — |
| T-Ry Properties LLC | — | DL041712 | 2015-01-12 | Inactive | Sioux Falls |
| T-S FARMS, INC. | — | DF026144 | 1987-02-19 | Active | PIERRE |
| T-SQUARE CONSTRUCTION, INC. | — | DB033232 | 1993-07-12 | Dissolved | — |
| T-Squared, LLC | — | DL018821 | 2009-04-29 | Active | SIOUX FALLS |
| T-Street Investments LLC | — | DL133737 | 2017-05-25 | Inactive | Rapid City |
| T-SYSTEMS NORTH AMERICA, INC. | — | FB028616 | 2004-06-09 | Active | Chicago |
| T-Top Timber & Homestead Co., LLC | — | DL297264 | 2025-04-05 | Suspended | Deadwood |
| T-Tower II, LLC | — | DL038711 | 2014-05-08 | Active | Rapid City |
| T-Tower IX, LLC | — | DL038715 | 2014-05-08 | Active | Rapid City |
| T-Tower V, LLC | — | DL038712 | 2014-05-08 | Active | Rapid City |
| T-Tower VI, LLC | — | DL038713 | 2014-05-08 | Active | RAPID CITY |
| T-Tower VIII, LLC | — | DL038714 | 2014-05-08 | Active | Rapid City |
| T-Walls, LLC | — | DL282636 | 2024-09-09 | Active | Sioux Falls |
| T-Way, LLC | — | DL267401 | 2024-01-30 | Active | Sioux Falls |
| T. & R., INC. | — | DB054428 | 2009-04-08 | Dissolved | LEOLA |
| T. AND A. TRUCKING LLC | — | DL025357 | 2011-08-04 | Dissolved | WHITE OWL |
| T. AND S. TRUCKING, INC. | — | DB036697 | 1996-01-08 | Dissolved | — |
| T. B. PENICK & SONS, INC. | — | FB034339 | 2010-05-13 | Inactive | SAN DIEGO |
| T. Baker Smith, LLC | — | FL328186 | 2026-05-07 | Active | Houma |
| T. BUNKERS CONSTRUCTION, LLC | — | DL018440 | 2009-03-09 | Active | DELL RAPIDS |
| T. C. MINING COMPANY | — | 19510055D | 1951-02-16 | Suspended | — |
| T. D. FARRELL CONSTRUCTION, INC. | — | FB034640 | 2010-09-20 | Active | Alpharetta |
| T. D. Health Ventures, Inc. | — | DB229280 | 2022-06-21 | Dissolved | North Sioux City |
| T. F. LUKE & SONS, INC. | — | DB043510 | 2000-12-15 | Active | KIMBALL |
| T. FRANCIS KEARNEY MEDIA CORP. | — | DB312011 | 2025-10-22 | Active | SIOUX FALLS |
| T. G. & Y. REALTY CO. | — | FB008210 | 1982-02-12 | Revoked | YORK |
| T. G. & Y. STORES CO. | — | FB003391 | 1969-09-15 | Revoked | YORK |
| T. G. F. INC. | — | DB029847 | 1990-09-21 | Inactive | — |
| T. G. MERCER CONSULTING SERVICES, INC. | — | FB032397 | 2008-02-11 | Active | Willow Park |
| T. GRAHAM COMPANIES | Wholesale trade | DB055788 | 2010-12-22 | Active | SIOUX FALLS |
| T. GRAHAM PROPERTIES, LLC | — | DL026502 | 2011-12-12 | Active | Sioux Falls |
| T. Grant Holding LLC | — | DL041105 | 2014-11-17 | Dissolved | RAPID CITY |
| T. H. PAGE, INC. | — | FB019939 | 1997-03-27 | Revoked | EDINA |
| T. HILMOE CLOTHIER, INC. | — | DB019389 | 1980-01-09 | Inactive | — |
| T. HURTGEN, LLC | — | DL017062 | 2008-07-31 | Active | SIOUX FALLS |
| T. J. ' S OF LUVERNE, INC. | — | FB020876 | 1997-12-31 | Revoked | LUVERNE |
| T. J. Bollinger Equipment LLC | — | DL130341 | 2017-02-04 | Dissolved | Timber Lake |
| T. J. LAND, INC. | — | DB041933 | 1999-10-12 | Active | YANKTON |
| T. J.'S TOGGERY, INC. | — | DB031695 | 1992-04-29 | Dissolved | — |
| T. K. COMPLIANCE, INCORPORATED | — | DB034712 | 1994-08-12 | Dissolved | — |
| T. L. A., INC. | — | DB025900 | 1986-12-08 | Inactive | — |
| T. L. INC. | — | DB029587 | 1990-06-11 | Inactive | — |
| T. L. WALLACE CONSTRUCTION, INC. | — | FB038819 | 2015-09-10 | Inactive | COLUMBIA |
| T. LOHRY, LLC | — | DL029391 | 2012-09-12 | Active | DAKOTA DUNES |
| T. LONG CONSULTING, LLC | — | DL042225 | 2015-02-06 | Active | BELLE FOURCHE |
| T. M. ELECTRONICS, INC. | — | 19610171D | 1961-11-03 | Active | — |
| T. M. SCHULTZ & CO., INC. | — | DB034498 | 1994-06-13 | Active | BRANDON |
| T. NELSON, INC. | — | DB027801 | 1988-10-28 | Inactive | — |
| T. O. HAAS TIRE COMPANY, INC. | — | FB021246 | 1998-04-22 | Revoked | LINCOLN |
| T. P. SEED, LLC | — | DL029628 | 2012-10-05 | Inactive | Chamberlain |
| T. R. HARRIS CONSTRUCTION, INC. | — | FB016878 | 1994-04-25 | Revoked | HOMER |
| T. R. SAVAGE COMPANY | — | 19020016D | 1902-03-27 | Merged | — |
| T. RAILS LLC | — | DL141041 | 2018-01-01 | Active | Highmore |
| T. REINDL REAL ESTATE SERVICES, INC. | — | DB041092 | 1999-02-17 | Dissolved | CUSTER |
| T. ROBERTS FAMILY, LLC | — | DL017145 | 2008-08-12 | Inactive | PIERRE |
| T. ROWE PRICE INSURANCE AGENCY, INC. | — | FB017127 | 1994-07-25 | Inactive | BALTIMORE |
| T. ROWE PRICE INVESTMENT SERVICES, INC. | — | FB007691 | 1981-05-11 | Active | Baltimore |
| T. Shellum Farms LLC | — | DL234800 | 2022-09-17 | Active | TRENT |
| T. STEELE CONSTRUCTION, INC. | — | FB036835 | 2013-06-19 | Active | Rock Island |
| T. W. DICK CO., INC. | — | 19680034F | 1968-07-08 | Revoked | — |
| T. WALDNER FARMS, LLC | — | DA028732 | 2012-07-06 | Dissolved | LAKE NORDEN |
| T. WEBER BOOKKEEPING, LLC | — | DL006587 | 2003-12-04 | Inactive | SIOUX FALLS |
| T. Wede Medical, Inc. | — | DB162618 | 2019-04-02 | Dissolved | Sioux Falls |
| T. Wilson Partners, L.P. | — | DP292458 | 2025-02-03 | Active | PIERRE |
| T. Wilson, Inc. | — | DB290245 | 2025-01-03 | Active | Farmers Branch |
| T. Wishard Insurance Agency L.L.C. | — | DL133208 | 2017-05-09 | Active | Watertown |
| T. Y. LIN INTERNATIONAL, INC. | — | FB282261 | 2024-09-03 | Active | San Francisco |
| T.A Landscaping LLC | — | DL241714 | 2023-01-07 | Dissolved | Sioux Falls |
| T.A. BAUER INC. | — | DB056186 | 2011-06-08 | Active | LAWTON |
| T.A. OLSON LIMITED PARTNERSHIP | — | DP001400 | 2002-12-27 | Active | — |
| T.A.C. COLLECTIONS, INC. | — | FB008936 | 1983-05-09 | Revoked | BLOOMINGTON |
| T.A.C.C.K. INC. | — | DB055388 | 2010-06-03 | Dissolved | MILBANK |
| T.A.C.K. Closet LLC | — | DL242730 | 2023-01-22 | Dissolved | Bristol |
| T.A.C.K. Coatings, LLC | — | DL314360 | 2025-11-24 | Active | Watertown |
| T.A.G. LLC | — | DL188891 | 2020-10-06 | Active | Jefferson |
| T.A.K.A. Consulting, Inc. | — | DB060609 | 2016-01-11 | Dissolved | EPHRATA |
| T.A.R. PREFERRED MORTGAGE CORPORATION | — | FB018888 | 1996-04-24 | Revoked | IRVINE |
| T.Arnold Consulting LLC | — | DL134195 | 2017-06-13 | Active | Rapid City |
| T.B. Fishing LLC | — | DL217536 | 2021-12-31 | Dissolved | Baltic |
| T.B.A. INSURANCE GROUP, LIMITED PARTNERSHIP | — | FP000475 | 2002-07-10 | Active | FT WORTH |
| T.B.C. PARTNERS, L.L.P. | — | DR000400 | 1999-07-08 | Dissolved | SPEARFISH |
| T.B.C. Solutions L.L.C | — | DL260909 | 2023-10-17 | Active | Viborg |
| T.C. & G. WATER ASSOCIATION, INC. | — | NS005170 | 1972-09-01 | Active | GLENCROSS |
| T.C. HANSON, INC. | — | DB019675 | 1980-04-28 | Inactive | — |
| T.C. Livestock Trucking, LLC | — | DL157841 | 2018-12-20 | Dissolved | Belle Fourche |
| T.C.'S CONSTRUCTION, LLC | — | DL045643 | 2015-10-28 | Active | Pickstown |
| T.C.Y.C. RESERVATION, INC. | — | 19610169D | 1961-12-18 | Dissolved | — |
| T.D. HAWKS, INC. | — | FB036310 | 2012-10-18 | Revoked | MONTICELLO |
| T.D.G. Real Estate, LLC | — | DL294988 | 2025-03-07 | Active | Keystone |
| T.D.S. Auto Repair LLC | — | DL177113 | 2020-02-10 | Active | SIOUX FALLS |
| T.D.S. AUTO REPAIR, INC. | — | DB029099 | 1990-01-24 | Dissolved | SIOUX FALLS |
| T.E. Forestry, LLC | — | DL251928 | 2023-05-31 | Active | Sioux Falls |
| T.E. IBBERSON COMPANY | — | FB012846 | 1989-07-13 | Inactive | HOPKINS |
| T.E. IBBERSON COMPANY | — | FB036371 | 2012-11-09 | Active | OMAHA |
| T.E. SWINE, INC. | — | DB047005 | 2003-06-18 | Active | COLOME |
| T.E.A. Express LLC | — | DL171298 | 2019-10-09 | Active | DAKOTA DUNES |
| T.E.A. EXPRESS LLC | — | DL012537 | 2006-11-20 | Inactive | NORTH SIOUX CITY |
| T.E.A.M. HAUS, INC. | — | DB056619 | 2012-01-17 | Active | Mitchell |
| T.E.A.M. PUBLISHING CORPORATION | — | DB025683 | 1986-09-09 | Inactive | — |
| T.E.A.M., L.L.C. | — | DL022866 | 2010-11-10 | Dissolved | SIOUX FALLS |
| T.E.I. BROADCASTING OF SIOUX FALLS, INC. | — | DB029835 | 1990-09-17 | Inactive | — |
| T.E.L., Corporation | — | DB159992 | 2019-02-05 | Active | Highmore |
| T.E.S. DESIGN & DRAFTING, INC. | — | FB012478 | 1988-12-12 | Inactive | WEST PALM BEACH |
| T.F. POWERS CONSTRUCTION CO. | — | FB010588 | 1985-12-09 | Revoked | FARGO |
| T.F. Starr Insurance LLC | — | DL200584 | 2021-04-09 | Inactive | Rapid City |
| T.G. IAM LLC | — | DL163207 | 2019-04-15 | Active | RAPID CITY |
| T.G. REALTY LLC | — | DL147271 | 2018-04-24 | Dissolved | SIOUX FALLS |
| T.G., LTD. | — | DB026054 | 1987-01-22 | Inactive | — |
| T.G.I.F., LLC | — | DL021581 | 2010-05-24 | Dissolved | MADISON |
| T.G.R. PROPERTIES, L.L.C. | — | DL001202 | 1997-04-21 | Dissolved | — |
| T.Geff Corp. | — | DB210774 | 2021-09-22 | Dissolved | FALLBROOK |
| T.H. Coaching LLC | — | DL252342 | 2023-06-06 | Dissolved | Sioux Falls |
| T.H.E. Contracting & Construction LLC | — | DL255153 | 2023-07-21 | Dissolved | Watertown |
| T.H.O.M.A.C., LLC | — | DL132927 | 2017-04-27 | Active | Clark |
| T.I.A. FARMS, L.L.C. | — | DL002884 | 2000-03-30 | Dissolved | — |
| T.I.B. INSURANCE BROKERS, INC. | — | FB012183 | 1988-07-05 | Inactive | GLENDALE |
| T.I.C. ENTERPRISES, L.L.C. | — | FL000614 | 1999-12-17 | Revoked | BEDMINSTER |
| T.I.C., INC. | — | FB010578 | 1985-11-27 | Active | ONALASKA |
| T.J Grace, LLC | — | DL275684 | 2024-05-24 | Active | Rapid City |
| T.J. ADAMS & ASSOCIATES, INC. | — | FB013315 | 1990-01-10 | Revoked | OAK BROOK |
| T.J. ADAMS GROUP, LLC | — | FL001456 | 2002-12-04 | Inactive | LOMBARD |
| T.J. Bork Enterprises, Inc. | — | DB149140 | 2018-06-04 | Dissolved | Sioux Falls |
| T.J. CAREERS, INC. | — | DB040462 | 1998-09-02 | Inactive | — |