| 21ST CENTURY CONSULTANTS, INC. | — | 2205250 | 1994-11-15 | Suspended | TOPEKA |
| 21ST CENTURY CONSULTING, LLC | — | 7945520 | 2014-08-28 | Dissolved | Olathe |
| 21ST CENTURY CORPORATION | — | 306779 | 1973-01-04 | Suspended | KANSAS CITY |
| 21ST CENTURY DAIRIES CO-OP/WASHINGTON COUNTY, INC. | — | 2518728 | 1997-09-05 | Dissolved | LINN |
| 21ST CENTURY DEMOCRACY FOUNDATION, INC. | — | 3281334 | 2002-02-08 | Suspended | DE SOTO |
| 21ST CENTURY DEV LLC | — | 9357526 | 2019-03-25 | Suspended | WICHITA |
| 21ST CENTURY DEVELOPMENT CO | — | 8748949 | 2017-08-14 | Suspended | WICHITA |
| 21ST CENTURY DEVELOPMENT INC | — | 9887415 | 2021-04-14 | Suspended | WICHITA |
| 21ST CENTURY DEVELOPMENT KS LLC | — | 7878101 | 2022-11-10 | Active | Wichita |
| 21ST CENTURY DEVELOPMENT L.L.C. | — | 3867868 | 2005-12-02 | Suspended | WICHITA |
| 21ST CENTURY ELECTRONICS, INC. | — | 2186302 | 1994-09-02 | Suspended | TOPEKA |
| 21ST CENTURY ENTERTAINMENT GROUP, LLC | — | 4083465 | 2007-06-12 | Dissolved | WICHITA |
| 21ST CENTURY ENTERTAINMENT, INC. | — | 2859148 | 2000-03-27 | Active | Chanute |
| 21ST CENTURY EQUIPMENT, LLC | — | 6495766 | 2011-05-05 | Active | Scottsbluff |
| 21ST CENTURY FAIRLAWN, LLC | — | 3881943 | 2006-01-04 | Suspended | TOPEKA |
| 21ST CENTURY FIREWORKS, L.L.C. | — | 2798882 | 1999-11-01 | Suspended | PERRY |
| 21ST CENTURY FLOORS & MORE LLP | — | 6043657 | 2005-05-07 | Suspended | WICHITA |
| 21ST CENTURY FOAM INSULATION, INC. | — | 3365475 | 2002-09-04 | Suspended | LENEXA |
| 21ST CENTURY FUNERAL COMPANY, L.C. | — | 2059285 | 1993-03-31 | Dissolved | LAWRENCE |
| 21ST CENTURY GENETICS, L.L.C. | — | 2526606 | 1997-09-24 | Active | Solomon |
| 21ST CENTURY GRAPHICS, L.L.C. | — | 2596732 | 1998-04-07 | Suspended | SHAWNEE |
| 21ST CENTURY GRAPHIX, INC. | — | 2688398 | 1999-01-21 | Suspended | KANSAS CITY |
| 21ST CENTURY GUTTER PROTECTION, LLC | — | 4138145 | 2007-11-14 | Suspended | OLATHE |
| 21ST CENTURY HEALTHCARE INITIATIVES LLC | — | 6273924 | 2008-08-13 | Suspended | PARSONS |
| 21ST CENTURY HEATING & COOLING, INC. | — | 2240117 | 1995-03-09 | Suspended | MERRIAM |
| 21ST CENTURY HOMESTEAD - MARK I, LLC | — | 3306693 | 2002-04-11 | Suspended | Altamont |
| 21ST CENTURY HOMESTEAD, INCORPORATED | — | 2389195 | 1996-07-29 | Suspended | ALTAMONT |
| 21ST CENTURY INC. | — | 1758101 | 1990-10-15 | Suspended | PRAIRIE VILLAGE |
| 21ST CENTURY INSURANCE AND FINANCIAL SERVICES, INC. | — | 7228141 | 1985-04-22 | Withdrawn | Grand Rapids |
| 21ST CENTURY KCK CITIZENS UNITED, INC | — | 7744428 | 2014-04-26 | Suspended | KANSAS CITY |
| 21ST CENTURY LAND, LLC | — | 4510012 | 2011-05-05 | Withdrawn | Scottsbluff |
| 21ST CENTURY LEASING, L.L.C. | — | 2435055 | 1996-12-24 | Dissolved | LEAWOOD |
| 21ST CENTURY LENEXA, LLC | — | 8254328 | 2016-04-07 | Dissolved | LEAWOOD |
| 21ST CENTURY LOGISTICS LLC | — | 6859508 | 2013-03-29 | Active | Stilwell |
| 21ST CENTURY LOGISTICS, INC. | — | 2460715 | 1997-03-10 | Suspended | STILWELL |
| 21ST CENTURY MANAGEMENT, LLC | — | 9828187 | 2021-02-03 | Active | Kansas City |
| 21ST CENTURY MOTORS INC. | — | 6312318 | 2009-02-09 | Suspended | WICHITA |
| 21ST CENTURY MOTORS, INC. | — | 2365583 | 1996-05-13 | Suspended | WICHITA |
| 21ST CENTURY NATURALIST SOCIETY INC | — | 6969679 | 2022-03-03 | Suspended | TOPEKA |
| 21ST CENTURY PLAZA PROPERTIES, INC. | — | 4009320 | 2006-12-05 | Active | Topeka |
| 21ST CENTURY PLAZA SERVICES LLC | — | 7597743 | 2013-10-29 | Suspended | TOPEKA |
| 21ST CENTURY POWER, LLC | — | 3885027 | 2006-01-11 | Active | Leawood |
| 21ST CENTURY PRAIRIE TRAILS WEST OWNER'S ASSOCIATION | — | 4938270 | 2015-07-29 | Active | Dallas |
| 21ST CENTURY PRAIRIE TRAILS WEST, LLC | — | 3907813 | 2006-03-07 | Suspended | Boca Raton |
| 21ST CENTURY PRODUCERS, INC. | — | 3356417 | 2002-08-09 | Dissolved | KANSAS CITY |
| 21ST CENTURY PRODUCTS, INC. | — | 648428 | 1980-07-29 | Suspended | WICHITA |
| 21ST CENTURY RECLAMATION CORPORATION | — | 520155 | 1978-01-16 | Suspended | DODGE CITY |
| 21ST CENTURY RESTAURANT, LLC | — | 8254302 | 2016-04-07 | Dissolved | LEAWOOD |
| 21ST CENTURY RETIREMENT SYSTEMS, INC. | — | 1803584 | 1991-09-20 | Suspended | TOPEKA |
| 21ST CENTURY SALES DEVELOPMENT CORPORATION | — | 2142586 | 1994-03-11 | Suspended | OVERLAND PARK |