| 21ST CENTURY HEALTHCARE, L.L.C. | — | 34854949K | 1999-10-29 | Inactive | WEST MONROE |
| 21ST CENTURY HOME IMPROVEMENTS, INC. | — | 33717780D | 1982-01-29 | Inactive | — |
| 21ST CENTURY HOME INSPECTIONS LLC | — | 34836615K | 1999-09-09 | Active | GRETNA |
| 21ST CENTURY HOMEBUILDERS INC. | — | 34487014D | 1995-02-24 | Inactive | SPRINGFIELD |
| 21ST CENTURY IMAGING TECHNOLOGY, L.L.C. | — | 35132554K | 2001-08-24 | Inactive | MONROE |
| 21ST CENTURY IMAGING, A LOUISIANA NONPROFIT CORPORATION | — | 34894849N | 2000-02-22 | Inactive | NEW ORLEANS |
| 21ST CENTURY INNOVATIONS, INC. | — | 34522013D | 1996-03-20 | Inactive | TICKFAW |
| 21ST CENTURY INSTITUTE, INC. | — | 34402527N | 1992-03-13 | Inactive | ABBEVILLE |
| 21ST CENTURY INSURANCE AGENCY, INC. | — | 28814790D | 1969-12-01 | Inactive | WEST MONROE |
| 21ST CENTURY INSURANCE AND FINANCIAL SERVICES, INC. | — | 34173832F | 1985-04-22 | Withdrawn | BATON ROUGE |
| 21ST CENTURY INTERFACE, L.L.C. | — | 35321882K | 2002-08-14 | Inactive | DENHAM SPRINGS |
| 21ST CENTURY INTERNATIONAL CONSORTIUM, INC. | — | 34648282D | 1998-06-03 | Inactive | NEW ORLEANS |
| 21ST CENTURY INTERNET INC. | — | 34523730F | 1996-04-08 | Withdrawn | COVINGTON |
| 21ST CENTURY INVESTMENT GROUP | — | 34613547J | 1998-02-13 | Active | LAKE CHARLES |
| 21ST CENTURY INVESTMENTS LLC | — | 41241901K | 2013-07-26 | Active | GRAY |
| 21ST CENTURY IT SOLUTIONS, LLC | — | 46284598K | 2025-01-10 | Active | — |
| 21ST CENTURY JOYFUL MANOR, LLC | — | 40507517K | 2011-05-09 | Inactive | BATON ROUGE |
| 21ST CENTURY KIDZ LLC | — | 40903886K | 2012-08-01 | Inactive | NEW ORLEANS |
| 21ST CENTURY LAB, INC. | — | 34381730D | 1991-06-03 | Inactive | SHREVEPORT |
| 21ST CENTURY LUBRICANTS, INC. | — | 31004760D | 1975-04-11 | Inactive | NEW ORLEANS |
| 21ST CENTURY MARKETING INSTITUTE, INC. | — | 34554749D | 1997-03-20 | Inactive | BATON ROUGE |
| 21ST CENTURY MARKETING, INC. | — | 34555073D | 1997-03-18 | Inactive | GRETNA |
| 21ST CENTURY MED-TEC, INC. | — | 34369098D | 1990-12-10 | Inactive | SHREVEPORT |
| 21ST CENTURY MEDICAL SUPPLIES, INC. | — | 40700523D | 2011-12-23 | Inactive | LAKE CHARLES |
| 21ST CENTURY NETWORK INC. | — | 34824415F | 1999-08-09 | Inactive | BATON ROUGE |
| 21ST CENTURY PARTNERS, INC. | — | 34400343D | 1992-02-13 | Inactive | AMITE |
| 21ST CENTURY PROFESSIONALS, INC. | — | 34440059D | 1993-07-28 | Inactive | BATON ROUGE |
| 21ST CENTURY PROPERTIES, INC. | — | 34614283D | 1998-02-23 | Inactive | COVINGTON |
| 21ST CENTURY REAL ESTATE SOLUTIONS AND INVESTMENTS, LLC | — | 44475111Q | 2021-06-23 | Inactive | BOSSIER CITY |
| 21ST CENTURY REALTY, INC. | — | 31408230D | 1976-04-22 | Inactive | LA PLACE |
| 21ST CENTURY SALES, INC. | — | 34885673D | 2000-01-31 | Inactive | NEW IBERIA |
| 21ST CENTURY SALVAGE, INC. | — | 45055223F | 2022-08-10 | Inactive | Baton Rouge |
| 21ST CENTURY SBIC, INC | — | 43694510D | 2019-12-09 | Inactive | LAKE CHARLES |
| 21ST CENTURY SCHOOL & COMMUNITY EDUCATION & CONSULTATION CORPORATION | — | 34933143N | 2000-05-01 | Inactive | NEW ORLEANS |
| 21ST CENTURY SECRETARY ANSWERING CENTER, INC. | — | 34418852D | 1992-10-08 | Inactive | METAIRIE |
| 21ST CENTURY SERVICES, "LLC" | — | 35121406K | 2001-07-30 | Inactive | LAKE CHARLES |
| 21ST CENTURY SOFTWARE, INC. | — | 34174465D | 1985-04-30 | Inactive | METAIRIE |
| 21ST CENTURY SOLUTIONS L.L.C | — | 40992207K | 2012-11-15 | Inactive | BATON ROUGE |
| 21ST CENTURY TECHS LLC | — | 35973313K | 2005-07-07 | Active | MARRERO |
| 21ST CENTURY TELEVISION, INC. | — | 30121080D | 1973-02-28 | Inactive | METAIRIE |
| 21ST CENTURY TITLE, L.L.C. | — | 35957377K | 2005-06-10 | Inactive | LAKE CHARLES |
| 21ST CENTURY TRACK METAL, INCORPORATED | — | 35558174D | 2003-09-17 | Inactive | FORT POLK |
| 21ST CENTURY TUTORING AND TEST PREPARATION INC. | — | 35790443D | 2004-10-05 | Inactive | NEW ORLEANS |
| 21ST CENTURY VISION, A LOUISIANA NONPROFIT CORPORATION | — | 34942693N | 2000-05-18 | Inactive | NEW ORLEANS |
| 21ST CENTURY WORKFORCE DEVELOPMENT | — | 45299254N | 2023-03-08 | Active | — |
| 21ST CENTURY WOUND CARE AND ADVANCED THERAPY, L.L.C. | — | 35132536K | 2001-08-24 | Inactive | MONROE |
| 21ST ENTERPRISES, INC. | — | 34320164D | 1988-12-29 | Inactive | KENNER |
| 21ST MORTGAGE CORPORATION | — | 34509937F | 1995-11-02 | Active | Baton Rouge |
| 21ST ONLINE, L.L.C. | — | 34505329K | 1995-09-08 | Inactive | BATON ROUGE |
| 21ST TAXI SERVICE L.L.C. | — | 44825811K | 2022-03-04 | Inactive | — |