| ALLIANCE FOR AFFORDABLE PSYCHOTHERAPY | — | 20090553ND | 2009-06-18 | Dissolved | WATERVILLE |
| ALLIANCE FOR AFFORDABLE SERVICES | — | 20000013NF | 1999-10-04 | Active | AUGUSTA |
| ALLIANCE FOR CHILDREN'S CARE, EDUCATION AND SUPPORTING SERVICES | — | 20000205ND | 1999-12-06 | Dissolved | BOWDOINHAM |
| ALLIANCE FOR COMMUNITY EDUCATION | — | 19920148ND | 1991-11-04 | Dissolved | KITTERY POINT |
| ALLIANCE FOR CONSUMERS USA, INC. | — | 20110018NF | 2010-10-18 | Active | MERRILL'S WHARF, PORTLAND |
| ALLIANCE FOR ECONOMIC DEMOCRACY | — | 202600479ND | 2026-04-03 | Active | BOOTHBAY |
| ALLIANCE FOR HEALTHCARE, INC. | — | 19900199ND | 1989-08-16 | Suspended | AUBURN |
| ALLIANCE FOR MAINE | — | 20170128ND | 2016-09-30 | Active | AUGUSTA |
| ALLIANCE FOR MAINE EXCELLENCE | — | 19930094ND | 1992-09-15 | Dissolved | AUGUSTA |
| ALLIANCE FOR MAINE'S FUTURE | — | 20020176ND | 2001-10-17 | Dissolved | AUGUSTA |
| ALLIANCE FOR RESPONSIBLE COMMUNITIES | — | 20080280ND | 2007-11-20 | Dissolved | POWNAL |
| ALLIANCE FOR TEACHING AND LEARNING IN AROOSTOOK SCHOOLS | — | 19960249ND | 1996-01-19 | Suspended | PRESQUE ISLE |
| ALLIANCE FOR THE MENTALLY ILL OF SOUTHERN YORK COUNTY | — | 19920434ND | 1992-06-26 | Suspended | KITTERY |
| ALLIANCE FOR TRAIL VEHICLES OF MAINE (ATV MAINE) | — | 19980140ND | 1997-10-17 | Active | — |
| ALLIANCE FOR TRANSPORTATION CHOICE | — | 19950447ND | 1995-05-24 | Dissolved | PEAKS ISLAND |
| ALLIANCE FOUNDATION | — | 19930179ND | 1992-11-30 | Suspended | — |
| ALLIANCE FRANCAISE `A PORTLAND | — | 19710069ND | 1971-06-21 | Suspended | PORTLAND |
| ALLIANCE FRANCAISE DU MAINE | — | 20180456ND | 2018-05-03 | Active | BRUNSWICK |
| ALLIANCE GARDENS ASSOCIATES | — | 19850022LP | 1984-08-29 | Suspended | — |
| ALLIANCE GLOBAL NETWORKS LLC | — | 20090165FC | 2008-09-24 | Active | CHELSEA |
| ALLIANCE GLOBAL SERVICES, LLC | — | 20150690FC | 2015-03-18 | Active | MERRILLS WHARF, PORTLAND |
| ALLIANCE GLOBAL SOLUTIONS, LLC | — | 202401135FC | 2024-01-23 | Withdrawn | AUGUSTA |
| ALLIANCE GROUP SERVICES INC. | — | 19981225 F | 1998-06-29 | Withdrawn | AUGUSTA |
| ALLIANCE HEALTH DOCUMENTATION, LLC | — | 20133746DC | 2013-05-07 | Dissolved | BREWER, |
| ALLIANCE HEALTHCARD OF FLORIDA, INC. | — | 20080213 F | 2007-09-17 | Active | AUGUSTA |
| ALLIANCE HEALTHCARE SERVICES, INC. | — | 20030125 F | 2002-08-19 | Active | AUGUSTA |
| ALLIANCE HEALTHCARE SOLUTIONS, LLC | — | 20230088FC | 2022-07-25 | Withdrawn | AUGUSTA |
| ALLIANCE HMO | — | 19960005M | — | — | — |
| ALLIANCE HOME CARE, LLC | — | 20230267DC | 2022-02-28 | Dissolved | PORTLAND |
| ALLIANCE HOME INSPECTIONS, LLC | — | 20184932DC | 2018-03-16 | Dissolved | HOPE |
| ALLIANCE HOME MORTGAGE, LLC | — | 20070486FC | 2007-03-22 | Canceled | AUGUSTA |
| ALLIANCE HR LLC | — | 202600826FC | 2025-12-08 | Active | CHELSEA |
| ALLIANCE IMAGING, INC. | — | 20000594 F | 1999-12-06 | Withdrawn | — |
| ALLIANCE INSPECTION MANAGEMENT, LLC | — | 20090330FC | 2008-12-23 | Withdrawn | AUGUSTA |
| ALLIANCE INSPECTION MANAGEMENT, LLC | — | 20230605FC | 2022-10-31 | Active | AUGUSTA |
| ALLIANCE INTEGRATED MARKETING SERVICES, LLC | — | 20190751FC | 2019-01-22 | Active | CHELSEA |
| ALLIANCE INTERNATIONAL | — | 19841099 D | 1984-01-19 | Dissolved | PORTLAND |
| ALLIANCE INVOLVED WITH THE MENTALLY AND EMOTIONALLY DISABLED | — | 19830213ND | 1983-01-11 | Suspended | DIXFIELD |
| ALLIANCE JIU JITSU RAYMOND LLC | — | 202601077DC | 2025-08-11 | Inactive | YORK |
| ALLIANCE LENDING PARTNERS, LLC | — | 20072559DC | 2007-02-28 | Active | WESTBROOK |
| ALLIANCE MANAGED SERVICES, LLC | — | 19990097FC | 1998-12-15 | Withdrawn | AUGUSTA |
| ALLIANCE MARINE, INC. | — | 19880594 F | 1988-05-12 | Withdrawn | AUGUSTA |
| ALLIANCE MARKETING CORP | — | 20231099 F | 2023-06-01 | Active | MERRILL'S WHARF, PORTLAND |
| ALLIANCE MEDICAL STAFFING, INC. | — | 202600259 F | 2025-08-21 | Active | YORK |
| ALLIANCE MEDICARE SOLUTIONS, LLC | — | 202700396DC | 2026-07-15 | Active | SCARBOROUGH |
| ALLIANCE MEDICATION SERVICES, LLC | — | 202600151FC | 2025-08-13 | Active | AUGUSTA |
| ALLIANCE MORTGAGE CORPORATION | — | 20051011 F | 2005-04-28 | Withdrawn | SACO |
| ALLIANCE OF LANDOWNERS, INC. | — | 20100431ND | 2010-05-05 | Dissolved | KINGSBURY PLANTATION |
| ALLIANCE OF MASONRY HEATER AND OVEN PROFESSIONALS, INCORPORATED | — | 20090025NF | 2008-12-05 | Withdrawn | AUGUSTA |
| ALLIANCE OF OCEAN EXPEDITIONS AND MARINE STUDIES, LLC | — | 202506548DC | 2024-10-09 | Dissolved | WILTON |