| NINewport Industrial Fabrication | Newport | 20–99 | ◐ LIKELY ACTIVE |
| PMPeavey Manufacturing | Eddington | 20–99 | ◐ LIKELY ACTIVE |
| SSSilvex Surface Technology | Westbrook | — | ◐ LIKELY ACTIVE |
| PHParker Hannifin CORP Pneumatic Div Kittery Maine | Kittery | — | ◇ UNVERIFIED |
| SWSmith & Wesson Division | Houlton | — | ◇ UNVERIFIED |
| MIMega Industries (gorham) | Gorham | — | ◇ UNVERIFIED |
| SMSouthern Maine Specialties | Saco | — | ◇ UNVERIFIED |
| WWahlcometroflex | Lewiston | — | ◇ UNVERIFIED |
| BMBrackett Machine INC | Westbrook | — | ◐ LIKELY ACTIVE |
| CSCives Steel | Augusta | — | ◐ LIKELY ACTIVE |
| EREverlast Roofing Inc. - Bridgton ME | Bridgton | 20–99 | ◐ LIKELY ACTIVE |
| GNGreat Northern Docks, INC. | Naples | 20–99 | ◐ LIKELY ACTIVE |
| GGGrover Gundrilling, LLC | Oxford | — | ◐ LIKELY ACTIVE |
| JMJ & M Machining, INC. | Skowhegan | — | ▲ REPORTED CLOSED |
| MTMarca Technologies LLC | Gorham | — | ◐ LIKELY ACTIVE |
| MFMccann Fabrication | New Gloucester | — | ◐ LIKELY ACTIVE |
| MCMid Cape Restoration | Hollis | — | ◐ LIKELY ACTIVE |
| WBWestmor Brewer | Brewer | 20–99 | ◐ LIKELY ACTIVE |
| MJMegquire & Jones CORP | South Portland | — | ◐ LIKELY ACTIVE |
| SMSouthern Maine Industries CORP | Gorham | — | ◐ LIKELY ACTIVE |
| SOSprague Operatinf Resources Facility - Mack Point | Searsport | — | ◐ LIKELY ACTIVE |
| DMDerecktor Marine Center INC | Georgetown | — | ◇ UNVERIFIED |
| GIGrimmel Industries | Topsham | — | ◇ UNVERIFIED |
Johns Manville | Lewiston | — | ◇ UNVERIFIED |
| MFMillinocket Fabrication & Machine INC | Millinocket | — | ◇ UNVERIFIED |
| PMPrescott Metal | Biddeford | — | ◇ UNVERIFIED |
| QCQuantum Clean | Scarborough | — | ◇ UNVERIFIED |
| QQuantumclean | Scarborough | — | ◇ UNVERIFIED |
| SSanmina-sci | Westbrook | — | ◇ UNVERIFIED |
| SMSaunders Mfg CO INC | Readfield | — | ◇ UNVERIFIED |
| SFSenior Flexonics Pathway | Lewiston | — | ◇ UNVERIFIED |
| SCSermatech Coating Facility ( a Praxair Co.) | Biddeford | — | ◇ UNVERIFIED |
| SSStiman Steel | Augusta | — | ◇ UNVERIFIED |
| SLSystem Logistics CORP | Lewiston | — | ◇ UNVERIFIED |
| WWWindham Weaponry | Windham | — | ◇ UNVERIFIED |
| 1F149 - Fryeburg, ME | Fryeburg | 20–99 | ◐ LIKELY ACTIVE |
| 2C27 Commercial Rd Kingfield, ME 04947 | Kingfield | 20–99 | ◐ LIKELY ACTIVE |
| AHAero Heating & Ventilating | Westbrook | 20–99 | ◐ LIKELY ACTIVE |
Align Precision -arundel, LLC | Arundel | — | ◐ LIKELY ACTIVE |
| AIAmerican Iron and Metal - Arundel | Arundel | 1–19 | ◐ LIKELY ACTIVE |
| AIAmerican Iron and Metal - Caribou | Caribou | 1–19 | ◐ LIKELY ACTIVE |
| AIAmerican Iron and Metal - Oakland | Oakland | 1–19 | ◐ LIKELY ACTIVE |
| ARAmerican Rheinmetall Biddeford | Biddeford | 20–99 | ◐ LIKELY ACTIVE |
| ASAmerican Steel and Aluminum LLC | South Portland | — | ▲ REPORTED CLOSED |
| CFCianbro Fabrication and Coating Corporation | Pittsfield | — | ◐ LIKELY ACTIVE |
| CMConfluent Medical Technologies, Windham | Windham | 20–99 | ◐ LIKELY ACTIVE |
| DMDSM Metal Fabrication Inc | Biddeford | 20–99 | ◐ LIKELY ACTIVE |
| GEGarage Engineering LLC | Wells | — | ◐ LIKELY ACTIVE |
| GDGeneral Dynamics Ordnance and Tactical Systems | Saco | 100–499 | ◐ LIKELY ACTIVE |
| JMJR Metal Frames Mfg., Inc. | Belgrade | 20–99 | ◐ LIKELY ACTIVE |