| AROOSTOOK CENTRE COMPANY | — | 19910008LF | 1990-08-16 | Withdrawn | PRESQUE ISLE |
| AROOSTOOK CENTRE MALL | — | 20050238M | — | | |
| AROOSTOOK CENTRE MULTIPLEX THEATRES, INC. | — | 19940294 D | 1993-08-23 | Suspended | AUGUSTA |
| AROOSTOOK CENTRE THEATRES MANAGEMENT, INC. | — | 19940295 D | 1993-08-23 | Suspended | AUGUSTA |
| AROOSTOOK CENTRE THEATRES, INC. | — | 19940296 D | 1993-08-23 | Suspended | AUGUSTA |
| AROOSTOOK CENTRE THEATRES, LIMITED PARTNERSHIP | — | 19940011LP | 1993-08-23 | Suspended | AUGUSTA |
| AROOSTOOK CENTRE, LLC | — | 20020118DC | 2001-07-31 | Dissolved | AUGUSTA |
| AROOSTOOK CHAPTER OF CREDIT UNIONS | — | 19870315ND | 1987-01-29 | Active | PORTLAND |
| AROOSTOOK CINEMAS, INC. | — | 19791551 D | 1979-05-16 | Active | PRESQUE ISLE |
| AROOSTOOK CLEANERS | — | 19902027 D | 1990-04-18 | Dissolved | CARIBOU |
| AROOSTOOK COLD STORAGE, LLC | — | 20143373DC | 2014-03-10 | Active | FORT FAIRFIELD |
| AROOSTOOK COMMERCIAL, LLC | — | 20153468DC | 2015-03-09 | Canceled | PRESQUE ISLE |
| AROOSTOOK COMMUNICATIONS, INC. | — | 19950813 D | 1994-11-01 | Dissolved | PRESQUE ISLE |
| AROOSTOOK COMMUNITY HOUSING, LLC | — | 20020149DC | 2001-08-02 | Suspended | WOODLAND |
| AROOSTOOK CONSTRUCTION COMPANY | — | 18910009 D | 1900-01-01 | Inactive | BANGOR |
| AROOSTOOK CONTINENTAL TRANSPORT, INC. | — | 19922306 D | 1992-06-26 | Active | PRESQUE ISLE |
| AROOSTOOK COUNCIL ON TRANSITION (ACT) | — | 19870375ND | 1987-03-17 | Merged | PRESQUE ISLE |
| AROOSTOOK COUNCIL TO PREVENT CHILD ABUSE | — | 19980424ND | 1998-05-20 | Active | PRESQUE ISLE |
| AROOSTOOK COUNSELING AND EVALUATION SERVICES, LLC | — | 20032408DC | 2003-06-03 | Dissolved | PRESQUE ISLE |
| AROOSTOOK COUNTY ACTION PROGRAM | — | 19710131ND | 1971-12-07 | Active | PRESQUE ISLE |
| AROOSTOOK COUNTY AGRICULTURAL CENTER | — | 19620020ND | 1962-05-21 | Dissolved | PRESQUE ISLE |
| AROOSTOOK COUNTY BRIDGE OF HOPE, INC. | — | 20160496ND | 2016-05-31 | Dissolved | PRESQUE ISLE |
| AROOSTOOK COUNTY CONCRETE, INC. | — | 20240165 D | 2023-10-06 | Active | ISLAND FALLS |
| AROOSTOOK COUNTY CONSERVATION ASSOCIATION | — | 20090298ND | 2009-01-08 | Active | NEW SWEDEN |
| AROOSTOOK COUNTY CONSTRUCTION, INC. | — | 19950024 D | 1994-07-05 | Active | PRESQUE ISLE |
| AROOSTOOK COUNTY CRIME STOPPERS, INC. | — | 19880054ND | 1987-09-01 | Active | HOULTON |
| AROOSTOOK COUNTY FARM BUREAU ASSOCIATION | — | 19520000CP | 1952-07-21 | Active | WASHBURN |
| AROOSTOOK COUNTY HABITAT FOR HUMANITY, INC. | — | 19930003ND | 1992-07-06 | Dissolved | PRESQUE ISLE |
| AROOSTOOK COUNTY HEBREW COMMUNITY CENTER, INC. | — | 19790023 L | 1979-11-02 | Active | |
| AROOSTOOK COUNTY HISTORICAL AND ART MUSEUM, OF HOULTON | — | 19370024ND | 1937-08-14 | Active | HOULTON |
| AROOSTOOK COUNTY HOTSHOT TEAM, INC. | — | 20040478ND | 2004-03-18 | Dissolved | MAPLETON |
| AROOSTOOK COUNTY HOUSING ASSOCIATION, LLC | — | 20244230DC | 2023-03-15 | Active | PORTLAND |
| AROOSTOOK COUNTY INSTALLERS, INC. | — | 19921403 D | 1992-02-19 | Suspended | CARIBOU |
| AROOSTOOK COUNTY INTERNATIONAL SPEEDWAY, INC. | — | 19761040 D | 1976-04-29 | Dissolved | FORT FAIRFIELD |
| AROOSTOOK COUNTY MAINE PICKERS LLC | — | 202701709DC | 2026-07-20 | Active | MAPLETON |
| AROOSTOOK COUNTY MAINE TRADING, LLC | — | 202403530DC | 2024-03-11 | Dissolved | HOULTON |
| AROOSTOOK COUNTY MARINE CORPS LEAGUE DETACHMENT 1368 | — | 20130520ND | 2013-05-28 | Dissolved | HOULTON |
| AROOSTOOK COUNTY ME S1, LLC | — | 20250090DC | 2023-08-31 | Active | CHELSEA |
| AROOSTOOK COUNTY ME S10, LLC | — | 202513009DC | 2025-03-19 | Active | CHELSEA |
| AROOSTOOK COUNTY ME S11, LLC | — | 202513010DC | 2025-03-19 | Active | CHELSEA |
| AROOSTOOK COUNTY ME S2, LLC | — | 20249893DC | 2023-08-23 | Active | CHELSEA |
| AROOSTOOK COUNTY ME S3, LLC | — | 20250089DC | 2023-08-31 | Active | CHELSEA |
| AROOSTOOK COUNTY ME S4, LLC | — | 20250088DC | 2023-08-31 | Active | CHELSEA |
| AROOSTOOK COUNTY ME S5, LLC | — | 20250577DC | 2023-09-20 | Active | CHELSEA |
| AROOSTOOK COUNTY ME S6, LLC | — | 20252174DC | 2023-11-02 | Active | CHELSEA |
| AROOSTOOK COUNTY ME S7, LLC | — | 20252172DC | 2023-11-02 | Active | CHELSEA |
| AROOSTOOK COUNTY ME S8, LLC | — | 20252173DC | 2023-11-02 | Active | CHELSEA |
| AROOSTOOK COUNTY ME S9, LLC | — | 202513008DC | 2025-03-19 | Active | CHELSEA |
| AROOSTOOK COUNTY MECHANICAL, INC. | — | 20120138 D | 2011-08-31 | Dissolved | PRESQUE ISLE |
| AROOSTOOK COUNTY MEDICAL SOCIETY | — | 19830162ND | 1982-12-10 | Dissolved | PRESQUE ISLE |