| MMMillennium Marine Usa, LLC | Eastport | ME | Transportation Equipment Manufacturing336611 | — | ◇ UNVERIFIED |
| MIMillrock INC | Sanford | ME | Wood Product Manufacturing321999 | — | ◇ UNVERIFIED |
| MAMizkan Americas | Auburn | ME | Food Manufacturing311941 | — | ◇ UNVERIFIED |
| MBModeration Brewing LLC | Brunswick | ME | Beverage and Tobacco Product Manufacturing312120 | — | ◇ UNVERIFIED |
| MIMod-set INC. | Brunswick | ME | Wood Product Manufacturing321992 | — | ◇ UNVERIFIED |
| MPMomo's Place LLC | Pownal | ME | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| MMMoosabec Mussels, INC. | Jonesport | ME | Food Manufacturing311711 | — | ◇ UNVERIFIED |
| MVMousam Valley Millwork INC | Springvale | ME | Furniture and Related Product Manufacturing337212 | — | ◇ UNVERIFIED |
| MGMp & G Machine & Design, INC. | Lewiston | ME | Fabricated Metal Product Manufacturing332710 | — | ◇ UNVERIFIED |
| MBMr. Boston Brands of Maine Dba 1820 Spirits | Lewiston | ME | Beverage and Tobacco Product Manufacturing312140 | — | ◇ UNVERIFIED |
 Nalco Company / Poland Spring | Hollis Center | ME | Beverage and Tobacco Product Manufacturing312112 | — | ◇ UNVERIFIED |
| NENathan E. Jones | Scarborough | ME | Fabricated Metal Product Manufacturing332812 | — | ◇ UNVERIFIED |
| NFNational Filter Media Corporation | Winthrop | ME | Machinery Manufacturing333999 | — | ◇ UNVERIFIED |
| NCN. C. Hunt, Inc. | Damariscotta | ME | Wood Product Manufacturing321113 | — | ◇ UNVERIFIED |
| NLN.e. Lighting Installs, INC. | Farmington | ME | Electrical Equipment, Appliance & Component Manufacturing335122 | — | ◇ UNVERIFIED |
| NLNepw Logistics, INC. | Scarborough | ME | Paper Manufacturing322299 | — | ◇ UNVERIFIED |
| NENew England Fiberglass Company, INC. | Portland | ME | Transportation Equipment Manufacturing336612 | — | ◇ UNVERIFIED |
| NENew England Inspection, INC. | South Portland | ME | Fabricated Metal Product Manufacturing332312 | — | ◇ UNVERIFIED |
| NENew England Millworks | Gorham | ME | Wood Product Manufacturing321918 | — | ◇ UNVERIFIED |
| NENew England Rent to Own, LLC | Albion | ME | Wood Product Manufacturing321992 | — | ◇ UNVERIFIED |
| NMNight Moves, LLC | South Portland | ME | Food Manufacturing311811 | — | ◇ UNVERIFIED |
| NPNonesuch Precision Services | Scarborough | ME | Fabricated Metal Product Manufacturing332994 | — | ◇ UNVERIFIED |
| NANorth American Waste Management Usa, LLC | Saco | ME | Fabricated Metal Product Manufacturing332999 | — | ◇ UNVERIFIED |
| NANorth Atlantic, INC. | Portland | ME | Food Manufacturing311712 | — | ◇ UNVERIFIED |
| NCNortheast Coating Technologies | Kennebunk | ME | Fabricated Metal Product Manufacturing332811 | — | ◇ UNVERIFIED |
| NPNortheast Paving - Washington Hma Plant | Washington | ME | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| NTNortheast Tree Harvesting Inc. | Easton | ME | Wood Product Manufacturing321113 | — | ◇ UNVERIFIED |
| NMNorthern Maine Aviation, LLC | Lincoln | ME | Transportation Equipment Manufacturing336411 | — | ◇ UNVERIFIED |
| NMNorthern Maine Paving INC | Van Buren | ME | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| NCNorthwood Canoe Company | Atkinson | ME | Transportation Equipment Manufacturing336612 | — | ◇ UNVERIFIED |
| NBNu Brewery, LLC | New Gloucester | ME | Beverage and Tobacco Product Manufacturing312120 | — | ◇ UNVERIFIED |
| OTOcean Team Property, LLC (Blue Ocean Seafood, Inc) | Scarborough | ME | Food Manufacturing311710 | — | ◇ UNVERIFIED |
| OAOdd Alewife Brewing Company, LLC | Waldoboro | ME | Beverage and Tobacco Product Manufacturing312120 | — | ◇ UNVERIFIED |
| OHO Hara Ice CO | Rockland | ME | Beverage and Tobacco Product Manufacturing312113 | — | ◇ UNVERIFIED |
| OAOldcastle Apg Biddeford | Biddeford | ME | Wood Product Manufacturing321219 | — | ◇ UNVERIFIED |
| OTOld Town Canoe CO | Old Town | ME | Transportation Equipment Manufacturing336612 | — | ◇ UNVERIFIED |
| OTOld Town Lumber | Old Town | ME | Wood Product Manufacturing321113 | — | ◇ UNVERIFIED |
| OROne Rig Design LLC | Poland | ME | Fabricated Metal Product Manufacturing332999 | — | ◇ UNVERIFIED |
| OTOn the Road Trailers INC. | Warren | ME | Transportation Equipment Manufacturing336999 | — | ◇ UNVERIFIED |
| OCOsdba Creations LLC | Portland | ME | Textile Product Mills314999 | — | ◇ UNVERIFIED |
| OHOSDBA Holdings LLC | Portland | ME | Printing and Related Support Activities323113 | — | ◇ UNVERIFIED |
| POPallet One of Maine | Livermore Falls | ME | Wood Product Manufacturing321920 | — | ◇ UNVERIFIED |
| PPPatriot Partners INC. | Westbrook | ME | Nonmetallic Mineral Product Manufacturing327390 | — | ◇ UNVERIFIED |
| PPPatriot Paving Group LLC | Glenburn | ME | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| PPPatriot Paving LLC | Auburn | ME | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| PIP-Cube, Inc. | Gorham | ME | Electrical Equipment, Appliance & Component Manufacturing335311 | — | ◇ UNVERIFIED |
| PHPemaquid Harbor Yachts | New Harbor | ME | Transportation Equipment Manufacturing336612 | — | ◇ UNVERIFIED |
| PBPen Bay MS LLC | Orland | ME | Transportation Equipment Manufacturing336611 | — | ◇ UNVERIFIED |
| PCPenley Corporation | West Paris | ME | Wood Product Manufacturing321999 | — | ◇ UNVERIFIED |
| PMPenobscot Mccrum, LLC | Belfast | ME | Food Manufacturing311411 | — | ◇ UNVERIFIED |
