| ADVANCED FABRICATION SERVICES, INC. | — | 84062 | 2007-09-04 | Active | LEMOYNE |
| Advanced Facility Solutions Holdings, LLC | Administrative and waste services | 468509 | 2025-06-09 | Active | Watertown |
| ADVANCED FACILITY SOLUTIONS, LLC | Construction | 449827 | 2024-06-19 | Suspended | SADDLE BROOK |
| ADVANCED FIBER WORKS, INC. | Construction | 418403 | 2022-11-08 | Suspended | Clifton |
| ADVANCED FIELD SERVICES, INC. | — | 83568 | 2007-05-08 | Inactive | COEUR D'ALENE |
| ADVANCED FINANCIAL COMPANY | Administrative and waste services | 307359 | 2015-09-08 | Active | Carlsbad |
| ADVANCED FINANCIAL SOLUTIONS, INC. | — | 86504 | 2008-11-10 | Inactive | Jacksonville |
| ADVANCED FIRE AND SAFETY COMPANY | — | 113210 | 1995-03-31 | Revoked | — |
| ADVANCED FIREWOOD LLC | Agriculture and forestry | 450014 | 2024-06-21 | Active | East Dummerston |
| ADVANCED FLEXIBLE COMPOSITES INC. | — | 84343 | 2007-11-05 | Revoked | LAKE IN THE HI |
| Advanced Flooring N.Y. LLC | Construction | 463263 | 2025-03-10 | Active | Albany |
| ADVANCED FOOT AND ANKLE CENTER LLC | — | 420037 | 2022-12-13 | Active | Rutland |
| Advanced Formulations Pharmacy, LLC | Manufacturing | 493995 | 2026-06-17 | Active | Tampa |
| ADVANCED FRESH CONCEPTS FRANCHISE CORP. | — | 75428 | 2003-03-17 | Active | TORRANCE |
| ADVANCED GEOMATICS AND DESIGN, LLC | Professional services | 311211 | 2016-01-19 | Suspended | lebanon |
| ADVANCED GEOSPATIAL SYSTEMS, LLC | — | 2436 | 1999-04-29 | Revoked | SHELBURNE |
| ADVANCED GREEN MOUNTAIN CONTRACTING CORP. | — | 124556 | 2003-09-05 | Revoked | — |
| ADVANCED GREENHOUSE SYSTEMS, INC. | — | 105235 | 1990-04-02 | Dissolved | BURLINGTON |
| ADVANCED GROUNDWORKS PAINTING CONTRACTORS, INC. | — | 278198 | 2008-01-01 | Revoked | — |
| ADVANCED GUATEMALAN EDUCATIONAL SUPPORT FOUNDATION, INC. | — | 303848 | 2015-05-29 | Revoked | Putney |
| ADVANCED HEALTH TECHNOLOGIES, INC. | Health care and social assistance | 360885 | 2019-08-02 | Active | Hudson |
| ADVANCED HEARING TECHNOLOGIES, INC. | — | 131148 | 2011-03-17 | Suspended | SHELBURNE |
| ADVANCED HEATING & PLUMBING, INC. | — | 76941 | 2003-10-06 | Revoked | BARRE |
| ADVANCED HEATING TECHNOLOGIES, INC. | — | 115323 | 1996-06-25 | Suspended | Barnard |
| ADVANCED HEMP SOLUTIONS LLC | Agriculture and forestry | 363900 | 2019-10-17 | Revoked | ORWELL |
| ADVANCED HOME LOANS CORP | — | 82074 | 2006-06-14 | Revoked | MARCO ISLAND |
| ADVANCED HOMEOWNING SOLUTIONS LLC | — | 32595 | 2010-04-07 | Active | ST. JOHNSBURY |
| ADVANCED ILLUMINATION, INC. | Manufacturing | 117331 | 1997-12-10 | Active | Rochester |
| ADVANCED INDEPENDENT RESEARCH LABORATORIES,INC. | — | 88837 | 1982-11-22 | Revoked | MONTPELIER |
| ADVANCED INDUSTRIAL SERVICES, INC. | — | 80219 | 2005-03-07 | Active | YORK |
| ADVANCED INNOVATION SERVICES LLC | Professional services | 370880 | 2020-04-23 | Active | Barre |
| ADVANCED INSULATION, LLC | — | 319386 | 2016-06-01 | Revoked | Milton |
| ADVANCED INTERCHANGE, INC. | — | 107602 | 1991-10-04 | Dissolved | BURLINGTON |
| ADVANCED INTERIOR SYSTEMS, INC. | — | 96490 | 1985-08-20 | Revoked | MANCHESTER |
| ADVANCED INTERIORS, INC. | — | 122575 | 2002-02-14 | Dissolved | COLCHESTER |
| ADVANCED INTERNET MARKETING, LTD | — | 122000 | 2001-08-22 | Dissolved | JEFFERSONVILLE |
| ADVANCED JANITORIAL CONSULTING, INC. | — | 108619 | 1992-06-03 | Dissolved | BURLINGTON |
| ADVANCED LABORATORIES, LLC | — | 29832 | 2012-04-16 | Revoked | RUTLAND |
| ADVANCED LAWN CARE, INC. | — | 125272 | 2004-03-30 | Revoked | COLCHESTER |
| ADVANCED LEARNING CENTERS, INC. | — | 85293 | 2008-05-06 | Revoked | ENGLEWOOD |
| ADVANCED LIGHTING, INC. | — | 80691 | 2005-06-17 | Revoked | SALT LAKE CITY |
| ADVANCED LIQUID RECYCLING, INCORPORATED | — | 83933 | 2007-08-02 | Revoked | MERIDEN |
| ADVANCED LUBRICANTS OF ILLINOIS, INC. | — | 83925 | 2007-08-01 | Revoked | GLEN ELLYN |
| ADVANCED MACHINE AND TOOL COMPANY, INC. | — | 105472 | 1990-05-17 | Active | MILTON |
| ADVANCED MAINTENANCE TECHNOLOGIES, INC. | — | 90491 | 1983-06-01 | Revoked | STOWE |
| ADVANCED MAINTENANCE, INC | Other services | 319109 | 2016-05-23 | Active | LUDLOW |
| ADVANCED MANAGEMENT TECHNOLOGY, INC. | Professional services | 418780 | 2022-11-15 | Active | Pasadena |
| ADVANCED MANUFACTURING LAB LLC | Manufacturing | 435855 | 2023-10-02 | Suspended | Rutland |
| ADVANCED MARINE PERFORMANCE, LLC | — | 347576 | 2018-09-07 | Revoked | Flippin |
| ADVANCED MATERIALS SOLUTIONS, LLC | — | 21463 | 2006-06-19 | Revoked | CHESTER |