| ADVANCED HYDRONIC PANELS, LLC | — | C192085 | 2009-02-11 | Dissolved | — |
| ADVANCED HYPNOTHERAPY OF MONTANA, LLC | — | C232444 | 2012-12-21 | Active | BUTTE |
| ADVANCED I.T. SERVICES, INC. | — | D120954 | 2003-01-27 | Dissolved | — |
| Advanced Imaging and Interventional Consultants P.A. P.C. | — | F1028353 | 2016-11-25 | Active | — |
| ADVANCED IMAGING AT COMMUNITY MEDICAL CENTER, LLC | — | C117321 | 2002-07-17 | Active | MISSOULA |
| Advanced Incorporated | — | F1216798 | 2021-05-10 | Withdrawn | — |
| ADVANCED INDUSTRIAL CONCEPTS & COATINGS, INC. | — | D069744 | 1990-07-03 | Dissolved | — |
| Advanced Industrial Controls, LLC | — | C1274300 | 2022-03-16 | Active | — |
| Advanced Industrial Devices LLC | — | C1581277 | 2025-11-04 | Active | — |
| ADVANCED INDUSTRIAL SAFETY RESOURCES, INC. | — | D191859 | 2009-02-03 | Dissolved | — |
| ADVANCED INDUSTRIAL SAFETY RESOURCES, PLLC | — | C189288 | 2008-10-17 | Dissolved | — |
| ADVANCED INDUSTRIAL SERVICES, CORP. | — | D143944 | 2005-05-06 | Dissolved | — |
| Advanced Industrial Services, Inc. | — | F1147518 | 2020-02-07 | Active | — |
| ADVANCED INDUSTRIAL SERVICES, INC. | — | F077552 | 2015-11-10 | Revoked | — |
| Advanced Industries, LLC | — | C1344569 | 2023-03-03 | Active | — |
| ADVANCED INFO DYNAMICS, INC. | — | D086235 | 1996-03-27 | Dissolved | — |
| ADVANCED INMATE TECHNOLOGIES INC. | — | F024452 | 1993-09-16 | Revoked | DENVER |
| ADVANCED INNOVATION, INC. | — | D251253 | 2014-07-21 | Active | — |
| ADVANCED INNOVATIONS, LLC | — | C092514 | 1997-11-14 | Dissolved | BILLINGS |
| ADVANCED INSIGHTS AND ADVISORY SERVICES LLC | — | C1547438 | 2025-07-03 | Active | — |
| Advanced Inspection Services L.L.C. | — | C1140459 | 2019-12-09 | Active | — |
| ADVANCED INSTALLATIONS PLUMBING & HEATING LLC | — | C137321 | 2004-10-05 | Dissolved | FLORENCE |
| ADVANCED INSULATION SOLUTIONS LLC | — | C177741 | 2007-12-10 | Dissolved | — |
| ADVANCED INSULATION, INC. | — | D232544 | 2012-12-27 | Dissolved | — |
| ADVANCED INSURANCE SERVICES, INC. | — | D140903 | 2005-02-22 | Dissolved | — |
| advanced insurance solutions corp | — | F1064914 | 2017-12-11 | Revoked | — |
| ADVANCED INTEGRATED MANAGEMENT, INC. | — | F031348 | 1998-04-22 | Revoked | ALBERTON |
| ADVANCED INTEGRATED MARKETING COMMUNICATIONS, LLC DBA AIM COMMUNICATIONS, LLC | — | C171772 | 2007-07-13 | Active | — |
| ADVANCED INTEGRATED SOLUTIONS, LLC | — | C252418 | 2014-08-27 | Dissolved | — |
| ADVANCED INTEGRATION SYSTEMS, INC. | — | D167949 | 2007-04-06 | Dissolved | — |
| ADVANCED INTELLIGENT RECONNAISSANCE SYSTEMS LLC | — | C225682 | 2012-05-09 | Dissolved | WILSALL |
| Advanced Interventions Associates, Inc. | — | D1254993 | 2021-12-16 | Dissolved | — |
| ADVANCED INVENTORY MANAGEMENT, INC. | — | F075630 | 2015-04-27 | Active | — |
| ADVANCED INVESTIGATIONS GROUP, INC. | — | D175956 | 2007-10-15 | Active | — |
| Advanced Isotopes of Montana, LLC | — | C1236823 | 2021-09-02 | Active | — |
| ADVANCED KONCEPTS, LLC | — | C248917 | 2014-05-16 | Active | KALISPELL |
| Advanced Land Management & Tree Removal, LLC | — | C1534933 | 2025-05-19 | Active | — |
| ADVANCED LANDSCAPE & CONCRETE, INC. | — | D079052 | 1994-04-19 | Dissolved | — |
| Advanced Landscape Solutions LLC | — | C1540440 | 2025-06-08 | Active | — |
| ADVANCED LASER CENTER, PLLC | — | C111509 | 2001-09-14 | Dissolved | BILLINGS |
| Advanced Laser Pro, LLC | — | C1419468 | 2024-02-07 | Active | — |
| Advanced Laser Services LLC | — | C1351316 | 2023-03-30 | Active | — |
| ADVANCED LAWN CARE & MAINTENANCE, LLC | — | C186632 | 2008-07-08 | Active | — |
| ADVANCED LEARNING CENTERS, INC. | — | F055304 | 2008-09-26 | Revoked | ENGLEWOOD |
| ADVANCED LENDING GROUP INC | — | F044382 | 2004-09-14 | Revoked | MURRIETA |
| Advanced Lending LLC | — | C1267128 | 2022-02-14 | Active | — |
| Advanced Life Management, Inc. | — | F1536795 | 2025-05-26 | Active | — |
| ADVANCED LIFE-SUPPORT EMERGENCY RESCUE TEAM | — | D046840 | 1978-07-11 | Dissolved | — |
| ADVANCED LIFTS & ELEVATORS, INC. | — | F049716 | 2006-10-17 | Revoked | NORTH SALT LAKE CITY |
| ADVANCED LIGHTING SERVICES, LLC | — | C162650 | 2006-11-02 | Dissolved | — |