| ASSOCIATED PIPE LINE CONTRACTORS, INC. | — | 19610021 F | 1961-09-08 | Withdrawn | AUGUSTA |
| ASSOCIATED PIPE LINE CONTRACTORS, INC. | — | 19920342 F | 1991-12-31 | Active | AUGUSTA |
| ASSOCIATED PROJECT CONTROL, INC. | — | 19960046 F | 1995-07-21 | Withdrawn | AUGUSTA |
| ASSOCIATED PROPERTY SERVICES | — | 19890181 D | 1988-07-19 | Suspended | AUBURN |
| ASSOCIATED RENOVATORS, LLC | — | 20092549DC | 2009-04-08 | Dissolved | SOUTH PORTLAND |
| ASSOCIATED REPORTERS, INC. | — | 19991612 D | 1999-03-01 | Dissolved | BANGOR |
| ASSOCIATED REPORTING SYSTEMS, INC. | — | 20180669 F | 2018-04-12 | Withdrawn | CHELSEA |
| ASSOCIATED REPORTING SYSTEMS, INC. | — | 19900531 F | 1990-04-12 | Withdrawn | AUGUSTA |
| ASSOCIATED RESOURCE MANAGEMENT SERVICES, LLC | — | 20083945DC | 2008-06-16 | Dissolved | BANGOR |
| ASSOCIATED RESTAURANT GROUP, INC. | — | 19981316 D | 1998-01-12 | Dissolved | BIDDEFORD |
| ASSOCIATED RETAIL GROUP, INC. | — | 19921683 D | 1992-04-01 | Suspended | YORK |
| ASSOCIATED ROOFING CONSULTANTS, INC. | — | 19810142 D | 1980-07-31 | Dissolved | PORTLAND |
| ASSOCIATED SECURITIES CORP. | — | 20030489 F | 2002-11-12 | Withdrawn | AUGUSTA |
| ASSOCIATED SEPTIC SERVICES, INC. | — | 19910637 D | 1990-10-24 | Active | BRUNSWICK |
| ASSOCIATED SEPTIC SERVICES, INC. | — | 19811010 D | 1981-02-06 | Merged | PORTLAND |
| ASSOCIATED SPORTSMAN'S OF CUMBERLAND COUNTY | — | 19800417ND | 1980-05-30 | Suspended | GORHAM |
| ASSOCIATED SUBSTATION ENGINEERING, INC. | — | 20130173 F | 2012-09-06 | Withdrawn | AUGUSTA |
| ASSOCIATED SURVEYORS, INC. | — | 19801498 D | 1980-06-05 | Suspended | YARMOUTH |
| ASSOCIATED TECHNOLOGIES, INC. | — | 20001272 F | 2000-06-28 | Withdrawn | AUGUSTA |
| ASSOCIATED TELECOMMUNICATIONS CONSULTANTS | — | 19980075 D | 1997-07-11 | Merged | Portland |
| ASSOCIATED TEXTILE RENTAL SERVICES, INC. | — | 19860652 F | 1986-05-28 | Withdrawn | AUGUSTA |
| ASSOCIATED THEATRE MANAGEMENT CORP. | — | 19770273 F | 1977-05-12 | Withdrawn | PORTLAND |
| ASSOCIATED TRAINING AND MANAGEMENT, INC. | — | 19990140 D | 1998-07-20 | Active | BANGOR |
| ASSOCIATED WHOLESALE GROCERS, INC. | — | 20220767 F | 2022-03-10 | Active | AUGUSTA |
| ASSOCIATED/ACC INTERNATIONAL LTD. | — | 20040575 F | 2004-01-21 | Withdrawn | AUGUSTA |
| ASSOCIATED/ACC INTERNATIONAL LTD. | — | 20180643 F | 2018-04-04 | Active | CHELSEA |
| ASSOCIATEPI LLC | — | 20216772DC | 2017-02-23 | Active | PORTLAND |
| ASSOCIATES ASKEW LLC | — | 20083987DC | 2008-06-24 | Dissolved | AUBURN |
| ASSOCIATES CONSUMER FINANCE COMPANY | — | 19970696 F | 1997-01-28 | Merged | Portland |
| ASSOCIATES EQUITY SERVICES COMPANY, INC. | — | 19900119 F | 1989-09-12 | Merged | AUGUSTA |
| ASSOCIATES FINANCIAL SERVICES COMPANY OF DELAWARE, INC. | — | 19970941 F | 1997-04-14 | Merged | AUGUSTA |
| ASSOCIATES FINANCIAL SERVICES COMPANY OF MAINE, INC. | — | 19962438 D | 1996-05-07 | Merged | PORTLAND |
| ASSOCIATES FINANCIAL SERVICES COMPANY, INC. | — | 19690044 F | 1969-06-05 | Withdrawn | AUGUSTA |
| ASSOCIATES FIRST CAPITAL MORTGAGE CORPORATION | — | 19840488 F | 1984-05-21 | Merged | AUGUSTA |
| ASSOCIATES FIVE INCORPORATED | — | 20010044ND | 2000-08-01 | Suspended | AUGUSTA |
| ASSOCIATES FOR PSYCHOTHERAPY, P.A. | — | 19860832 D | 1985-10-31 | Dissolved | KENNEBUNK |
| ASSOCIATES HOUSING FINANCE SERVICES, INC. | — | 19970359 F | 1996-10-10 | Withdrawn | AUGUSTA |
| ASSOCIATES HOUSING FINANCE, LLC | — | 19980061FC | 1997-11-21 | Withdrawn | AUGUSTA |
| ASSOCIATES HOUSING FINANCE, LLC | — | 20060211FC | 2005-11-14 | Merged | AUGUSTA |
| ASSOCIATES IN GLOBAL LOGISTICS, LLC | — | 20133942DC | 2010-02-01 | Canceled | YORK |
| ASSOCIATES IN ORAL & MAXILLOFACIAL SURGERY, P.A. | — | 19893029 D | 1989-06-23 | Dissolved | BANGOR |
| ASSOCIATES IN ORTHODONTICS, P.A. | — | 19820292 D | 1981-08-31 | Dissolved | BANGOR |
| ASSOCIATES IN YORK ORTHOPAEDICS, LLC | — | 19990628DC | 1999-02-26 | Suspended | PORTLAND |
| ASSOCIATES IN YORK ORTHOPAEDICS, P.A. | — | 19991650 D | 1999-03-11 | Active | YORK |
| ASSOCIATES INFORMATION SERVICES, INC. | — | 20030267 F | 2002-09-16 | Merged | AUGUSTA |
| ASSOCIATES INFORMATION SERVICES, INC. | — | 19710092 F | 1971-11-15 | Withdrawn | AUGUSTA |
| ASSOCIATES OF GLENS FALLS, INC. | — | 19890541 F | 1989-03-09 | Active | AUGUSTA |
| ASSOCIATES OF NAPLES, INC. | — | 19800726 D | 1979-12-12 | Active | BRIDGTON |
| ASSOCIATES OF THE OSHER MAP LIBRARY OF THE UNIVERSITY OF SOUTHERN MAINE | — | 19910118ND | 1990-10-02 | Dissolved | PORTLAND |
| ASSOCIATES/TRANS-NATIONAL LEASING, INC. | — | 19890366 F | 1988-12-19 | Withdrawn | AUGUSTA |