| 21ST CENTURY GAMING CONCEPTS INC. | C17943-2001 | 2001-07-06 | Revoked | — |
| 21ST CENTURY GAMING CONCEPTS, INC. | C3907-1998 | 1998-02-26 | Revoked | — |
| 21ST CENTURY GAMING LLC | E0295792018-2 | 2018-06-19 | Revoked | — |
| 21ST CENTURY GAMING PARTNERS, INC. | C13834-2001 | 2001-05-24 | Revoked | — |
| 21ST CENTURY GATEWAY, LLC | E0483502005-2 | 2005-07-26 | Merged | — |
| 21ST CENTURY GLOBAL BUILDERS LTD. | E0238352016-9 | 2016-05-25 | Revoked | — |
| 21ST CENTURY GLOBAL CONSULTANTS, INC. | C31489-2001 | 2001-11-29 | Revoked | — |
| 21ST CENTURY GLOBAL CONSULTANTS, LLC | LLC4231-1997 | 1997-10-28 | Revoked | — |
| 21ST CENTURY GLOBAL CORP. | E0019032005-3 | 2005-02-08 | Revoked | — |
| 21ST CENTURY GLOBAL EDUCATIONAL RESOURCES, LLC | LLC4233-1997 | 1997-10-28 | Revoked | — |
| 21ST CENTURY GLOBAL MARKETING, LLC | LLC4327-1997 | 1997-11-03 | Revoked | — |
| 21ST CENTURY GLOBAL NETWORK, LLC | LLC841-1998 | 1998-02-18 | Revoked | — |
| 21ST CENTURY GLOBAL PARTNERS, LLC | LLC4232-1997 | 1997-10-28 | Dissolved | — |
| 21ST CENTURY GLOBAL TECHNOLOGIES, LLC | LLC4328-1997 | 1997-11-03 | Revoked | — |
| 21ST CENTURY GLOBAL TRUST, LLC | LLC4263-1997 | 1997-10-29 | Revoked | — |
| 21ST CENTURY GREEN TECHNOLOGIES, INC | E0295562007-2 | 2007-04-18 | Revoked | — |
| 21ST CENTURY GROUP, INC. | C17480-1994 | 1994-11-08 | Revoked | — |
| 21ST CENTURY HEALTH CARE MANAGEMENT, INC. | C13779-1994 | 1994-09-06 | Revoked | — |
| 21ST CENTURY HEALTH CARE, LLC | E0382652007-9 | 2007-06-01 | Revoked | — |
| 21ST CENTURY HEALTH GROUP, INC. | C4599-1998 | 1998-03-05 | Revoked | — |
| 21ST CENTURY HEALTH MANAGEMENT, INC., A NEVADA LIMITED LIABILITY COMPANY | LLC10899-1993 | 1993-09-03 | Revoked | — |
| 21ST CENTURY HEALTH PRODUCTS | C22706-1998 | 1998-09-25 | Revoked | — |
| 21ST CENTURY HEALTH SPAS, INC. | C2730-1979 | 1979-05-18 | Merged | — |
| 21st Century Healthcare, Inc. | E22466332022-1 | 2022-04-12 | Dissolved | — |
| 21ST CENTURY HOLDING CORP. | C19405-2002 | 2002-08-05 | Revoked | — |
| 21ST CENTURY HOLDINGS CORP. | C24757-1998 | 1998-10-22 | Revoked | — |
| 21ST CENTURY HOLDINGS, INC. | C28359-2000 | 2000-10-23 | Revoked | — |
| 21ST CENTURY HOLDINGS, LLC | E0007312016-6 | 2016-01-07 | Revoked | — |
| 21ST CENTURY HOMES, LLC | E14556072021-0 | 2021-05-13 | Revoked | — |
| 21st Century Housecall LLC | E24533382022-1 | 2022-07-11 | Dissolved | — |
| 21ST CENTURY INFORMATION MANAGEMENT, INC. | C26182-1999 | 1999-10-21 | Active | — |
| 21ST CENTURY INFORMATION SERVICES, INC. | C8945-1998 | 1998-04-20 | Revoked | — |
| 21ST CENTURY INNOVATION FUND, LLC | LLC1496-2000 | 2000-02-16 | Revoked | — |
| 21ST CENTURY INNOVATIOVE TECHOLOGIES, INC. | C10705-1998 | 1998-05-08 | Revoked | — |
| 21ST CENTURY INNOVATORS | C28002-1999 | 1999-11-10 | Revoked | — |
| 21ST CENTURY INSURANCE AND FINANCIAL SERVICES, INC. | C2709-1985 | 1985-04-22 | Withdrawn | — |
| 21ST CENTURY INTERIOR DESIGN LLC | E0810812005-6 | 2005-11-18 | Dissolved | — |
| 21ST CENTURY INTERNATIONAL | C32319-2000 | 2000-12-06 | Revoked | — |
| 21ST CENTURY INTERNATIONAL DEVELOPMENT, INC. | C5489-1994 | 1994-04-11 | Dissolved | — |
| 21ST CENTURY INTERNET TECH LLC | E0093692009-5 | 2009-02-23 | Revoked | — |
| 21ST CENTURY INVESTMENT ADVISORS, INC. | C6971-1997 | 1997-04-02 | Revoked | — |
| 21ST CENTURY INVESTMENT SERVICES LLC | E0119742008-2 | 2008-02-26 | Revoked | — |
| 21ST CENTURY INVESTMENTS | C8015-2001 | 2001-03-29 | Revoked | — |
| 21ST CENTURY INVESTMENTS NEVADA, LLC | E0476422005-3 | 2005-07-22 | Revoked | — |
| 21ST CENTURY INVESTMENTS, INC. | C17477-1994 | 1994-11-08 | Revoked | — |
| 21ST CENTURY JDT LLC | E18655232021-2 | 2021-11-01 | Active | — |
| 21ST CENTURY JET CORPORATION | C5011-1989 | 1989-06-08 | Revoked | — |
| 21ST CENTURY LIFESTYLE TRADER LLC | E0119732008-1 | 2008-02-26 | Revoked | — |
| 21ST CENTURY LIFESTYLE, LLC | E0481932007-3 | 2007-07-10 | Dissolved | — |
| 21ST CENTURY LIGHTING ENTERPRISES, LLC | LLC28796-2004 | 2004-12-10 | Dissolved | — |