| NWNyle Water Heating System | Bangor | ME | Machinery Manufacturing333415 | 20-99 | ◐ LIKELY ACTIVE |
| OCOdin's Choice Mead, INC | Waldoboro | ME | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| OGOrchard Girls Cidery | Kingfield | ME | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| OFOrigins Fruit LLC | Pownal | ME | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| OBOrono Brewing Company | Old Town | ME | Beverage and Tobacco Product Manufacturing312140 | — | ◐ LIKELY ACTIVE |
| OLOrstead, LLC | Lyman | ME | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| OPOtter Point Spirits LLC | Owls Head | ME | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| PIPalletONE, Inc | Livermore Falls | ME | Wood Product Manufacturing321920 | 100-499 | ◐ LIKELY ACTIVE |
| PCPerennial Cider | Swanville | ME | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| PMPharmalogic Me, INC. | Augusta | ME | Chemical Manufacturing325412 | — | ◐ LIKELY ACTIVE |
| PFPhoenix Feeds of Maine, LLC | Augusta | ME | Food Manufacturing311119 | 1-19 | ◐ LIKELY ACTIVE |
| PDPine Distilling, LLC | Indian Island | ME | Beverage and Tobacco Product Manufacturing312140 | — | ◐ LIKELY ACTIVE |
| PFPineland Farms Dairy Company | Bangor | ME | Food Manufacturing311513 | 20-99 | ◐ LIKELY ACTIVE |
| PFPineland Farms Natural Meats | New Gloucester | ME | Food Manufacturing311612 | — | ◐ LIKELY ACTIVE |
| PPPiscataquis Precision Machining | Sangerville | ME | Fabricated Metal Product Manufacturing332710 | — | ◐ LIKELY ACTIVE |
| PTPittsfield - Tubes & Cores - C333 | Pittsfield | ME | Paper Manufacturing322299 | 20-99 | ◐ LIKELY ACTIVE |
| PPoland | Poland | ME | Wood Product Manufacturing321999 | 20-99 | ◐ LIKELY ACTIVE |
| PMPortland Millwork - BMD | Portland | ME | Wood Product Manufacturing321911 | 100-499 | ◐ LIKELY ACTIVE |
| PFPorvair Filtration Group - Caribou | Caribou | ME | Fabricated Metal Product Manufacturing332117 | 20-99 | ◐ LIKELY ACTIVE |
| PWPratt & Whitney North Berwick Parts Center | North Berwick | ME | Transportation Equipment Manufacturing336412 | 500+ | ◐ LIKELY ACTIVE |
| PBPrimo Brands - Hollis Factory | Hollis | ME | Beverage and Tobacco Product Manufacturing312112 | 100-499 | ◐ LIKELY ACTIVE |
| PPrimoBrands-Kingfield | Kingfield | ME | Beverage and Tobacco Product Manufacturing312112 | 20-99 | ◐ LIKELY ACTIVE |
| PBPrimo Brands - Poland Spring Factory | Poland Spring | ME | Beverage and Tobacco Product Manufacturing312112 | 100-499 | ◐ LIKELY ACTIVE |
| PHProspect Hill Winery LLC | Lebanon | ME | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| RWRas Wines LLC | Portland | ME | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
Redline & Redline Woodworking INC. | Bremen | ME | Furniture and Related Product Manufacturing337212 | — | ◐ LIKELY ACTIVE |
| RCRelic Cider | Roque Bluffs | ME | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| RHRicker Hill Farms | Turner | ME | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| RHRicker Hill Farms, INC. | Greene | ME | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| RLRobbins Lumber Co. EBLLC | East Baldwin | ME | Wood Product Manufacturing321113 | 20-99 | ◐ LIKELY ACTIVE |
| RGRocky Ground, LLC | Newburgh | ME | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| RWRoot Wild LLC | Portland | ME | Beverage and Tobacco Product Manufacturing312140 | — | ◐ LIKELY ACTIVE |
| RTRound Turn Distilling | Biddeford | ME | Beverage and Tobacco Product Manufacturing312140 | — | ◐ LIKELY ACTIVE |
| SBSaco - BMD | Saco | ME | Wood Product Manufacturing321214 | 20-99 | ◐ LIKELY ACTIVE |
| SFSalmon Falls Winery | South Berwick | ME | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| SBSands Business Equipment & Supplies, LLC | York | ME | Miscellaneous Manufacturing339940 | — | ◐ LIKELY ACTIVE |
| SRSandy River Distillery, LLC | Farmington | ME | Beverage and Tobacco Product Manufacturing312140 | — | ◐ LIKELY ACTIVE |
| SBSanford Butcher Shop | Sanford | ME | Food Manufacturing311612 | — | ◐ LIKELY ACTIVE |
| SNSappi NA - Portland | Portland | ME | Paper Manufacturing322121 | 100-499 | ◐ LIKELY ACTIVE |
| SNSappi NA Westbrook Operations | Westbrook | ME | Paper Manufacturing322121 | 100-499 | ◐ LIKELY ACTIVE |
| SNSappi North America - Tech Center | Westbrook | ME | Paper Manufacturing322121 | 20-99 | ◐ LIKELY ACTIVE |
| SRScarborough RTS Packaging - F427 | Scarborough | ME | Paper Manufacturing322121 | 20-99 | ◐ LIKELY ACTIVE |
| SSDIX-Maine | Windham | ME | Chemical Manufacturing325413 | 20-99 | ◐ LIKELY ACTIVE |
| SHSea Hag Cider CO. LLC | Rockport | ME | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| SCSearsport Concrete Plant | Searsport | ME | Nonmetallic Mineral Product Manufacturing327320 | 1-19 | ◐ LIKELY ACTIVE |
| SFSenior Flexonics Pathway - Maine | Lewsiton | ME | Fabricated Metal Product Manufacturing332999 | 20-99 | ◐ LIKELY ACTIVE |
| SBSerco - Bath, ME | Bath | ME | Transportation Equipment Manufacturing336611 | 20-99 | ◐ LIKELY ACTIVE |
| SOShalom Orchard | Franklin | ME | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| SMShields Meats & Produce, Inc. | Kennebunk | ME | Food Manufacturing311612 | — | ◐ LIKELY ACTIVE |
| SCShort Creek Meats, LLC | Kennebunk | ME | Food Manufacturing311612 | — | ◐ LIKELY ACTIVE |