| Cassidy Rose Creative LLC | DL233004 | 2022-09-01 | Active | Sioux Falls |
| Cassie Applegate, Prof. L.L.C. | DL129070 | 2016-12-28 | Dissolved | Rapid City, SD |
| Cassie's Cleaning LLC | DL246955 | 2023-03-21 | Active | Mount Vernon |
| Cassinel & Co. LLC | DL273140 | 2024-04-18 | Suspended | Keystone |
| CASSIOPEIA INVESTMENTS, LLC | DL020573 | 2010-01-11 | Active | RAPID CITY |
| CASSIOPEIA PICTURES LLC | DL024658 | 2011-05-12 | Dissolved | PIERRE |
| CASSLING DIAGNOSTIC IMAGING CLINICAL NETWORKING, LLC | FL000826 | 2000-12-06 | Inactive | OMAHA |
| CASSLING DIAGNOSTIC IMAGING, INC. | FB010714 | 1986-02-19 | Revoked | OMAHA |
| CASSLING DIAGNOSTIC IMAGING, INC. | FB011825 | 1987-12-09 | Active | OMAHA |
| CASSON, INC. | DB026171 | 1987-03-03 | Inactive | — |
| CASSON-MARK CORPORATION | FB037207 | 2013-11-07 | Inactive | Richardson |
| Cassondra Braun, LLC | DL048171 | 2016-04-25 | Inactive | Sioux Falls |
| CASSUTT BROTHERS CONCRETE AND MASONRY, INC. | DB135730 | 2017-08-08 | Dissolved | RAMONA |
| CASSVILLE LODGING, INC. | DB031933 | 1992-07-10 | Inactive | — |
| CAST AI Group, Inc. | FB257717 | 2023-08-30 | Active | Miami |
| Cast And Blast LLC | DL320482 | 2026-02-10 | Active | Pierre |
| CAST COOZIE, LLC | DL027861 | 2012-04-12 | Inactive | SIOUX FALLS |
| CAST IN PLACE CONCRETE OF SOUTH DAKOTA, LLC | DL008308 | 2004-12-10 | Inactive | — |
| Castalia Creek Holdings, LLC | DL274876 | 2024-05-13 | Active | Summerset |
| CASTALIA CREEK RANCH LIMITED PARTNERSHIP | DP000767 | 1997-12-03 | Inactive | — |
| Castalia Systems, LLC | FL135530 | 2017-07-31 | Inactive | Tampa |
| CASTALIA-PLATTE TELEPHONE COMPANY | PU004062 | 1965-04-13 | Inactive | — |
| Castalian Omphalos, LLC | DL305908 | 2025-07-30 | Active | Excelsior |
| Castaneda Styles LLC | DL206746 | 2021-07-19 | Inactive | Spearfish |
| CASTAWAYS, INC. | DB034120 | 1994-03-04 | Active | LETCHER |
| CASTEEL AUCTION AND REAL ESTATE, INC. | DB042594 | 2000-03-23 | Active | STURGIS |
| Casteel Co LLC | DL329141 | 2026-05-19 | Active | vale |
| CASTEEL GAME FARM LLP | DR000674 | 2002-11-05 | Revoked | — |
| CASTEEL MANAGEMENT, L.L.C. | DL005833 | 2003-05-05 | Dissolved | — |
| CASTEEL PHEASANT RANCH LLC | DL006314 | 2003-09-26 | Inactive | — |
| CASTEL LIMITED PARTNERSHIP | DP001722 | 2006-02-16 | Inactive | — |
| CASTELAN DRYWALL LLC | DL139279 | 2017-11-01 | Dissolved | SIOUX FALLS |
| CASTELLAN SOLUTIONS, INC. | FB256039 | 2023-08-03 | Active | ATLANTA |
| Castellum Capital Fund 1 LP | DP249881 | 2023-05-01 | Active | SIOUX FALLS |
| Castellum Capital Management LLC | DL205792 | 2021-07-02 | Active | Sioux Falls |
| Caster Brothers, LLC | DL041945 | 2015-01-15 | Dissolved | WATERTOWN |
| Caster Enterprises, LLC | DL241997 | 2023-01-12 | Active | EDGEMONT |
| Castera LLC | DL172485 | 2019-11-01 | Inactive | Friant |
| Casterra LLC | DL273195 | 2024-04-18 | Active | Watertown |
| CASTFIRM FAMILY ADVISORY LLC | FL324606 | 2026-03-30 | Active | Garden City |
| CASTILLEJA PROPERTIES LLC | DL021426 | 2010-05-06 | Active | SIOUX FALLS |
| Castillo Construction LLC | DL215554 | 2021-12-02 | Dissolved | Sioux Falls |
| Castillo Yard Care LLC | DL299410 | 2025-05-03 | Active | Sioux Falls |
| Castin & Blastin, LLC | DL236841 | 2022-10-17 | Active | Akaska |
| CASTIN & BLASTING GUIDE SERVICE, LLC | DL255283 | 2023-07-24 | Active | Akaska |
| CASTINE COMMUNITY HOSPITAL | 19280005ND | 1928-08-06 | Active | — |
| CASTINE HISTORICAL SOCIETY, INC. | 19660061ND | 1966-10-07 | Active | — |
| CASTINE SCIENTIFIC SOCIETY | 19590031ND | 1959-07-09 | Active | — |
| CASTING FOR RECOVERY, INC. | FN168983 | 2019-08-20 | Inactive | CINCINNATI |
| CASTING FOR RECOVERY, INC. | FN030435 | 2015-03-30 | Revoked | CINCINNATI |
| Casting Kingdoms LLC | DL215301 | 2021-11-30 | Dissolved | Sioux Falls |
| Casting Vets | NS145227 | 2018-03-12 | Active | HOT SPRINGS |
| CASTLE & COOKE MORTGAGE, LLC | FL004632 | 2009-06-29 | Inactive | SALT LAKE CITY |
| CASTLE & COOKE MORTGAGE, LLC | FL198828 | 2021-03-17 | Active | Draper |
| Castle Aggregate Inc. | DB179528 | 2020-04-03 | Dissolved | — |
| Castle Biosciences, Inc. | FB287594 | 2024-11-21 | Active | Friendswood |
| CASTLE BRIAN LLC | DL223311 | 2022-03-23 | Inactive | Brookings |
| Castle Bridge, Inc. | DB060020 | 2015-05-13 | Dissolved | MADISON |
| CASTLE CLEANING, LTD. | DB033387 | 1993-09-08 | Dissolved | — |
| CASTLE COFFEE, INC. | DB048554 | 2004-07-26 | Inactive | — |
| CASTLE COFFEE, INCORPORATED | FB023376 | 1999-12-29 | Revoked | GILLETTE |
| Castle Construction Llc | DL188339 | 2020-09-26 | Dissolved | Sioux Falls |
| CASTLE CONSTRUCTION, INC. | FB032039 | 2007-10-01 | Revoked | COLUMBUS |
| CASTLE CONSULTING, LLC | DL001737 | 1998-06-29 | Inactive | — |
| Castle Contracting LLC | DL225417 | 2022-04-21 | Active | Whitewood |
| CASTLE CREDIT CO. HOLDINGS, LLC | FL044397 | 2016-06-16 | Active | CHICAGO |
| CASTLE CREEK CONSTRUCTION MANAGEMENT, LLC | FL005636 | 2011-04-15 | Inactive | CALDWELL |
| Castle Creek Contracting LLC | DL314863 | 2025-12-02 | Active | Hill City |
| CASTLE CREEK ENTERPRISES, INC. | DB054906 | 2009-11-16 | Dissolved | RAPID CITY |
| CASTLE CREEK LLC | DL011945 | 2006-08-21 | Inactive | — |
| CASTLE CREEK RANCH, LLLP | DP002205 | 2011-03-09 | Active | RAPID CITY |
| Castle Custom Woods, LLC | FL206532 | 2021-07-15 | Inactive | Spearfish |
| CASTLE DIRECTIONAL DRILLING, LLC | FL148379 | 2018-05-16 | Revoked | MERIDIAN |
| Castle Edge Insurance Agency, Inc. | RS006028 | — | Unknown | — |
| CASTLE ENERGY GROUP, LLC | FL004492 | 2009-03-16 | Active | MERIDIAN |
| CASTLE ENTERPRISES, LLC | DL033312 | 2013-07-31 | Active | PALO ALTO |
| CASTLE FARMS, INC. | DB038386 | 1997-03-31 | Inactive | CHAMBERLAIN |
| CASTLE INN, INC. | DB012764 | 1975-02-19 | Inactive | — |
| CASTLE INVESTMENTS, L.L.C. | DL009052 | 2005-04-18 | Inactive | SIOUX FALLS |
| CASTLE KING LLC | DL022630 | 2010-10-14 | Active | MANSFIELD |
| CASTLE LODGING, INC. | DB033887 | 1994-01-05 | Dissolved | — |
| CASTLE LYN, LTD. | DB026081 | 1987-01-29 | Inactive | — |
| CASTLE MANAGEMENT, INC. | DB038195 | 1997-02-06 | Dissolved | — |
| Castle Manor, LLC | DL041285 | 2014-12-03 | Dissolved | SIOUX FALLS |
| CASTLE MORTGAGE CORPORATION | FB039180 | 2016-03-10 | Revoked | IRVINE |
| Castle Point Development, LLC | DL280052 | 2024-07-30 | Active | Rapid City |
| CASTLE PRESERVATION, INC. | NS006083 | 1976-09-03 | Dissolved | ABERDEEN |
| CASTLE RESORT LLC | DL044815 | 2015-08-21 | Inactive | BIG STONE CITY |
| CASTLE RESORTS & CONSULTING, INC. | DB037466 | 1996-07-18 | Inactive | — |
| CASTLE RETIREMENT HOME, INC. | DB048730 | 2004-09-13 | Dissolved | WHITEWOOD |
| CASTLE ROCK CONSTRUCTION COMPANY | FB008897 | 1983-04-20 | Revoked | SIOUX CITY |
| CASTLE ROCK ENTERPRISES, INC. | DB027591 | 1988-07-20 | Inactive | — |
| CASTLE ROCK FARMS, LLC | DL027506 | 2012-03-12 | Inactive | NEWELL |
| Castle Rock Holdings LLC | DL235284 | 2022-09-23 | Active | BELLE FOURCHE |
| CASTLE ROCK LLC | DL027247 | 2012-02-17 | Inactive | MILBANK |
| CASTLE ROCK LODGING, L.L.C. | DL000525 | 1995-08-14 | Dissolved | — |
| Castle Rock Oral and Maxillofacial Surgery PC | DB195585 | 2021-01-28 | Dissolved | Castle Rock |
| Castle Rock Solutions, LLC | DL293968 | 2025-02-24 | Active | Custer |
| CASTLE ROCK WATER CORPORATION | DB249001 | 2018-03-21 | Active | RAPID CITY |
| CASTLE ROCK WATER CORPORATION | NS145672 | 2018-03-21 | Active | RAPID CITY |
| CASTLE ROCK WATER USERS LLP | DR000647 | 2002-07-03 | Revoked | — |
| CASTLE SERVICES, INC. | FB015592 | 1992-10-09 | Revoked | BISMARCK |
| Castle Street Holdings, LLC | DL284761 | 2024-10-09 | Dissolved | Sioux Falls |
| CASTLE TRANSFORMATIONS LLC | DL133708 | 2017-05-24 | Dissolved | Sioux Falls |
| CASTLE WOODWORKS, INC. | DB023029 | 1984-01-03 | Dissolved | CASTLEWOOD |
| CASTLE WOODWORKS, INC. | DB055822 | 2010-12-30 | Dissolved | CASTLEWOOD |
| CASTLE/PLETT PRODUCTIONS, LLC | DL019628 | 2009-08-27 | Inactive | PIERRE |
| CASTLELINE RISK AND INSURANCE SERVICES, LLC | FL157842 | 2018-12-20 | Active | Alpharetta |
| CASTLEROCK CONSTRUCTION AND CONCRETE, INC. | DB055837 | 2011-01-04 | Active | De Smet |
| CASTLEROCK HOMES, L.L.P. | DR000318 | 1998-11-18 | Inactive | — |
| CASTLEROCK HOMES, LLC | DL004488 | 2002-02-19 | Dissolved | SIOUX FALLS |
| CASTLEROCK REAL ESTATE, L.L.P. | DR000431 | 1999-12-13 | Inactive | — |
| CASTLEROCK SECURITY, INC. | FB033311 | 2009-03-11 | Inactive | ARLINGTON HEIGHTS |
| CASTLES DESIGN GROUP, P.C. | FB035858 | 2012-03-27 | Active | Houston |
| Castles, Voyages and Adventures, LLC | DL160209 | 2019-03-01 | Active | CLARK |
| CASTLETON MEADOWS LIMITED PARTNERSHIP | DP180524 | 2020-04-27 | Active | PIERRE |
| Castleton Pharmacy Corp. | FB279007 | 2024-07-17 | Active | Staten Island |
| CASTLEWOOD | CI000206 | 2001-01-18 | Active | — |
| CASTLEWOOD AREA PUBLIC HOSPITAL DISTRICT | DM009405 | 1989-01-17 | Active | — |
| CASTLEWOOD ASSISTED LIVING CENTER, L.L.C. | DL001216 | 1997-04-28 | Dissolved | — |
| Castlewood Assisted Living, LLC | DL040526 | 2014-10-01 | Active | GARRETSON |
| Castlewood Blessings Center | NS132587 | 2017-04-17 | Dissolved | CASTLEWOOD |
| CASTLEWOOD BUILDERS, LLC | DL021129 | 2010-03-31 | Dissolved | SIOUX FALLS |
| CASTLEWOOD BUILDING SUPPLIES, INC. | DB055111 | 2010-01-28 | Dissolved | CASTLEWOOD |
| CASTLEWOOD CARE CENTER, INC. | NS007740 | 1977-07-15 | Inactive | — |
| CASTLEWOOD CEMETERY ASSOCIATION | NS001101 | 1919-04-14 | Active | CASTLEWOOD |
| Castlewood Community Foundation | NS163842 | 2019-04-29 | Active | CASTLEWOOD |
| CASTLEWOOD COMMUNITY GOLF COURSE, INC. | DB035993 | 1995-06-29 | Inactive | CASTLEWOOD |
| CASTLEWOOD CORNER MARKET, LLC | DL157907 | 2018-12-21 | Dissolved | Castlewood |
| Castlewood Days Committee | NS049951 | 2016-04-01 | Active | Castlewood |
| CASTLEWOOD EDUCATION FOUNDATION | NS013104 | 2006-04-07 | Active | Castlewood |
| CASTLEWOOD FARMERS ELEVATOR | CO000002 | 1912-07-12 | Inactive | CASTLEWOOD |
| CASTLEWOOD FIRE DISTRICT AND CASTLEWOOD AMBULANCE DISTRICT | PF000052 | 2007-12-12 | Active | CASTLEWOOD |
| CASTLEWOOD FIRST PRESBYTERIAN CHURCH | CH001357 | 1983-03-24 | Active | CASTLEWOOD |
| CASTLEWOOD GOLF COURSE, INC. | NS009524 | 1991-12-02 | Dissolved | — |
| CASTLEWOOD GRAIN STORAGE, LLP | DR000402 | 1999-07-14 | Active | Castlewood |
| CASTLEWOOD HISTORICAL SOCIETY | NS008764 | 1988-06-22 | Active | CASTLEWOOD |
| CASTLEWOOD HOUSING CORPORATION | NS004798 | 1970-08-11 | Dissolved | Arlington |
| CASTLEWOOD LUMBER, INC. | DB051831 | 2006-12-22 | Inactive | WATERTOWN |
| CASTLEWOOD MANUFACTURING, FABRICATION AND WELDING, INC. | DB041503 | 1999-06-04 | Inactive | — |
| CASTLEWOOD REPAIR, INC. | DB047365 | 2003-09-26 | Inactive | — |
| CASTLEWOOD SENIOR CITIZEN CENTER, INCORPORATED | NS006447 | 1978-03-17 | Dissolved | — |
| CASTLEWOOD STEAKHOUSE, INC. | DB043584 | 2000-12-28 | Inactive | — |
| Castlewood Storage Units, LLC | DL173809 | 2019-12-04 | Active | Castlewood |
| CASTO TRAVEL US LLC | FL160215 | 2019-02-08 | Inactive | SAN JOSE |
| CASTO TRAVEL, INC. | FB020734 | 1997-11-19 | Inactive | SAN JOSE |
| Castora Media LLC | DL307457 | 2025-08-21 | Active | Sioux Falls |
| CASTREJON INCORPORATED | FB036022 | 2012-06-05 | Revoked | BLAINE |
| Castro's Construction LLC | DL137272 | 2017-09-21 | Active | DOLTON |
| Casual Brillance LLC | DL286099 | 2024-10-30 | Active | Harrisburg |
| CASUAL CONSIGNMENTS LLC. | DL027572 | 2012-03-19 | Dissolved | ABERDEEN |
| CASUAL CONTRACT, INC. | FB013826 | 1990-09-13 | Revoked | MINNEAPOLIS |
| CASUAL MALE RETAIL STORE, LLC | FL001876 | 2004-02-11 | Active | Canton |
| CASUALTY & SURETY, INC. | FB026083 | 2002-03-25 | Inactive | BIRMINGHAM |
| CASUALTY ADJUSTMENTS, INC. | DB006366 | 1940-02-15 | Inactive | — |
| CASUALTY ASSURANCE, LTD. | FB018616 | 1996-01-29 | Revoked | MONTEVIDEO |
| CASUALTY UNDERWRITERS, INC. | FB008441 | 1982-06-24 | Revoked | FARMINGTON HILLS |
| Casus Company LLC | FL295011 | 2025-03-07 | Revoked | — |
| CASWELL PLUMBING, HEATING AND AIR CONDITIONING L.L.C. | FL003446 | 2007-04-16 | Active | INWOOD |
| CASWOOD, INC. | DB060342 | 2015-09-11 | Active | Elkton |
| CAT BROTHERS ENTERPRISES LLC | DL018488 | 2009-03-16 | Dissolved | WORTHING |
| CAT COMMUNICATIONS INTERNATIONAL, INC. | FB027535 | 2003-07-29 | Inactive | ROANOKE |
| CAT Construction Inc. | DB060822 | 2016-04-18 | Active | Summerset |
| Cat Creek Cattle Co. LLC | DL200391 | 2021-04-07 | Active | Wasta |
| CAT ENTERPRISES, INC. | DB050739 | 2006-02-21 | Active | Rapid City |
| CAT INC. | DB044346 | 2001-07-19 | Inactive | — |
| Cat on a Bike LLC | DL247328 | 2023-03-26 | Dissolved | Box Elder |
| CAT Partners LLC | DL049904 | 2016-09-12 | Active | RAPID CITY |
| Cat Paws, Inc. | DB317709 | 2026-01-11 | Active | Spearfish |
| CAT Properties LLC | DL137072 | 2017-09-15 | Dissolved | BALTIC |
| CAT Residential, LLC | DL248071 | 2023-04-05 | Active | Sioux Falls |
| CAT SCALE COMPANY | FB013840 | 1990-09-21 | Active | WALCOTT |
| Cat Scratch Salsa LLC | DL302984 | 2025-06-22 | Active | Sioux Falls |
| CAT Scratch Studios, LLC | DL161787 | 2019-03-16 | Active | Lead |
| Cat Toy Club LLC | DL047042 | 2016-02-10 | Dissolved | WEBSTER |
| CAT Wash, LLC | DL271758 | 2024-03-28 | Active | Spearfish |
| CAT'S CLEANING INC. | DB055479 | 2010-07-12 | Dissolved | RAPID CITY |
| CAT'S CORNER CONVENIENCE, INC. | DB056380 | 2011-10-07 | Active | Castlewood |
| Cat's Custom Skulls, LLC | DL215705 | 2021-12-04 | Active | Chamberlain |
| CAT'S LAIR, INC. | DB052040 | 2007-02-14 | Inactive | — |
| CAT'S MEOW FELINE RESCUE, INC. | NS014929 | 2012-09-06 | Dissolved | HOT SPRINGS |
| Cat's Territory Distributing LLC | DL289087 | 2025-01-01 | Dissolved | Rapid City |
| Cat-Tales-Ranch, L.L.C. | DL038696 | 2014-05-07 | Active | Alcester |
| Cat3 llc Limited Liability Company | DL229253 | 2022-06-21 | Dissolved | Long Lake |
| Cat3 Safety, LLC | DL292668 | 2025-02-07 | Dissolved | Sioux Falls |
| Cataclysmic Creations, LLC | DL268260 | 2024-02-09 | Dissolved | Sioux Falls |
| CATAGRAN ENTERPRISES, LLP | DR001122 | 2007-07-20 | Dissolved | Rapid City |
| CATALAN, INC. | FB025048 | 2001-04-17 | Revoked | MINOT |
| Catalina Asset Group II LLC | DL188735 | 2020-10-02 | Dissolved | Rapid City |
| Catalina Asset Group LLC | DL188729 | 2020-10-02 | Dissolved | Rapid City |
| Catalina Buffalo Holdings 4 LLC | DL233697 | 2022-08-30 | Active | Sioux Falls |
| Catalina Buffalo Holdings LLC | DL201578 | 2021-04-23 | Active | Sioux Falls |
| Catalina Capital, LLC | DL206867 | 2021-07-20 | Dissolved | Sioux Falls |
| Catalina Falls Avian Sanctuary & Gardens | NS050050 | 2016-07-28 | Dissolved | — |
| CATALINA HEALTH RESOURCE, INC. | FB020411 | 1997-08-18 | Inactive | WILMINGTON |
| CATALINA MARKETING CORPORATION | FB017202 | 1994-08-23 | Active | St. Petersburg |
| Catalina Rock Motel LLC | DL233692 | 2022-08-30 | Active | Sioux Falls |
| CATALINA U.S. INSURANCE SERVICES LLC | FL043813 | 2015-10-05 | Inactive | FARMINGTON |
| Catalis Strategies LLC | DL296226 | 2025-03-24 | Active | FORT PIERRE |
| CATALIS TAX & CAMA, INC. | FB246100 | 2023-03-09 | Active | Alpharetta |