| Alabama Copper Bronze Co., Inc. | Manufacturing | 000-092-956 | 1983-06-29 | Active | BIRMINGHAM |
| Alabama Cord & Cable, Inc. | — | 000-099-203 | 1984-07-25 | Active | DOTHAN |
| Alabama Cordage Co. | — | 000-702-308 | 1900-01-01 | Active | MONTGOMERY |
| Alabama Core Group LLC | — | 001-185-973 | 2025-04-15 | Active | |
| Alabama Core Supply, Inc. | — | 000-058-950 | 1979-11-19 | Active | BESSEMER |
| Alabama Cork and Grain LLC | — | 000-530-848 | 2018-10-01 | Active | |
| Alabama Corn Mills | — | 000-702-312 | 1900-01-01 | Dissolved | MOBILE |
| Alabama Corn Mills Company | — | 000-702-314 | 1931-01-29 | Dissolved | MOBILE |
| Alabama Corn Mills Investment Co. | — | 000-702-318 | 1902-12-23 | Dissolved | MOBILE |
| Alabama Cornerstone Group, L.L.C. | — | 000-491-999 | 2007-03-21 | Dissolved | AUBURN |
| Alabama Cornerstone Medical, LLC | — | 000-276-521 | 2013-03-28 | Active | |
| Alabama Corporate Games, Inc. | — | 000-069-597 | 1991-09-13 | Active | MONTGOMERY |
| Alabama Corporate Housing LLC | — | 001-025-854 | 2022-06-19 | Active | |
| Alabama Corporate Management, Inc. | — | 000-169-260 | 1995-01-13 | Active | GULF SHORES |
| Alabama Corporation Bureau | — | 000-702-326 | 1911-09-21 | Dissolved | MONTGOMERY |
| Alabama Corporation Meeting and Minute Service, Inc | — | 000-251-693 | 2007-03-09 | Active | CULLMAN |
| Alabama Correctional Dental Associates, LLC | — | 000-276-176 | 2013-03-27 | Dissolved | |
| Alabama Correctional Employee Support Fund, Inc. | — | 000-570-966 | 2010-01-14 | Active | MONTGOMERY |
| Alabama Correctional Officers Association, Inc. | — | 000-567-476 | 2008-03-05 | Dissolved | MONTGOMERY |
| Alabama Correctional Officers Association, Inc. | — | 000-256-475 | 2008-03-07 | Dissolved | MONTGOMERY |
| Alabama Correctional Officers Association, LLC | — | 000-417-184 | 2008-03-05 | Dissolved | MONTGOMERY |
| Alabama Correctional Officers, Inc. | — | 000-567-475 | 2008-03-05 | Dissolved | MONTGOMERY |
| Alabama Correctional Officers, Inc. | — | 000-256-474 | 2008-03-07 | Dissolved | MONTGOMERY |
| Alabama Correctional Officers, LLC | — | 000-417-081 | 2008-03-05 | Dissolved | MONTGOMERY |
| Alabama Corrections Institution Finance Authority | — | 000-705-196 | 1965-10-26 | Active | MONTGOMERY |
| Alabama Corrections Officers Association, LLC | — | 000-382-577 | 2017-02-08 | Active | PENSACOLA |
| Alabama Cosmeceutical Labs, LLC | — | 000-689-382 | 2003-04-07 | Active | HOOVER |
| Alabama Cottage One, LLC | — | 001-046-399 | 2022-10-26 | Active | East Point |
| Alabama Cottage Two, LLC | — | 001-046-405 | 2022-10-26 | Active | East Point |
| Alabama Cotton | — | 000-702-331 | 1910-01-25 | Dissolved | DOTHAN |
| Alabama Cotton Co. | — | 000-702-329 | 1900-01-01 | Dissolved | DOTHAN |
| Alabama Cotton Cooperative Association | — | 000-702-333 | 1934-07-31 | Active | MONTGOMERY |
| Alabama Cotton Growers Co-Operative Association | — | 000-702-338 | 1922-01-07 | Active | BIRMINGHAM |
| Alabama Cotton Oil Co. | — | 000-702-348 | 1900-01-01 | Dissolved | HUNTSVILLE |
| Alabama Cotton Oil Company | — | 000-702-343 | 1924-08-14 | Dissolved | MONTGOMERY |
| Alabama Cotton Planter Company | — | 000-702-351 | 1906-08-20 | Dissolved | EVERGREEN |
| Alabama Cotton Products Co. | — | 000-702-356 | 1902-01-01 | Active | MONTGOMERY |
| Alabama Cotton Seed Crushers Association | — | 000-702-359 | 1920-09-06 | Active | BIRMINGHAM |
| Alabama Cotton and Grain Company, Inc. | — | 000-702-334 | 1919-10-13 | Dissolved | HARTSELLE |
| Alabama Cottonwood Tree Properties, LLC | — | 000-635-290 | 2020-06-23 | Active | |
| Alabama Council On Human Relations, Inc. | Health care and social assistance | 000-813-748 | 1984-04-12 | Active | Auburn |
| Alabama Council for Computer Education, Inc. | — | 000-702-371 | 1982-08-10 | Dissolved | MOBILE |
| Alabama Council for Excellent Government | — | 000-329-100 | 2015-02-23 | Active | |
| Alabama Council for Technology in Education, Inc. | — | 000-568-070 | 2008-06-20 | Dissolved | MONTGOMERY |
| Alabama Council of Administrators of Professional Nursing Education Programs | — | 000-505-447 | 2018-01-04 | Active | BIRMINGHAM |
| Alabama Council of Association Executives, Inc. | — | 000-065-676 | 1987-07-14 | Active | MONTGOMERY |
| Alabama Council of Better Businesses, Inc. | — | 000-702-363 | 1980-09-24 | Active | DOTHAN |
| Alabama Council of Cooperatives | — | 000-711-086 | 1957-11-06 | Active | AUBURN |
| Alabama Council of Emergency Medical Services, Inc. | — | 000-076-012 | 1993-11-17 | Active | MONTGOMERY |
| Alabama Council on Adolescent Pregnancy, Inc. | — | 000-711-083 | 1986-09-25 | Active | AUBURN UNIVERSITY |