| 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 |
| 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 |
| RGRocky Ground, LLC | Newburgh | ME | Beverage and Tobacco Product Manufacturing312130 | — | ◐ 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 |
| SFSidereal Farm Brewery, LLC | Vassalboro | ME | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| SMSloat's Machining & Fabrication | Houlton | ME | Fabricated Metal Product Manufacturing332312 | — | ◐ LIKELY ACTIVE |
| SLSmith's Log Smokehouse | Monroe | ME | Food Manufacturing311612 | — | ◐ LIKELY ACTIVE |
| SWSmith & Wesson Houlton ME Site A | Houlton | ME | Fabricated Metal Product Manufacturing332994 | 20-99 | ◐ LIKELY ACTIVE |
| SWSmith & Wesson Houlton, ME Site B | Houlton | ME | Primary Metal Manufacturing331221 | 20-99 | ◐ LIKELY ACTIVE |
| SRSoft Robotic Angiography LLC | Cape Elizabeth | ME | Miscellaneous Manufacturing339112 | — | ◐ LIKELY ACTIVE |
| SRSolar Rock Winery LLC | Dayton | ME | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| SASomic America | Brewer | ME | Transportation Equipment Manufacturing336330 | 100-499 | ◐ LIKELY ACTIVE |
| SPSouthpaw Packing Company, INC | Limington | ME | Food Manufacturing311612 | — | ◐ LIKELY ACTIVE |
| SPSouth Portland (2) | South Portland | ME | Computer and Electronic Product Manufacturing334413 | 100-499 | ◐ LIKELY ACTIVE |
| SRSplit Rock Distilling | Newcastle | ME | Beverage and Tobacco Product Manufacturing312140 | — | ◐ LIKELY ACTIVE |
| SCSpotted Cat Winery | Greenville | ME | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| SFStone Fort Distillery | Biddeford | ME | Beverage and Tobacco Product Manufacturing312140 | — | ◐ LIKELY ACTIVE |
| STStone Tree Farm & Cidery | Unity | ME | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| SKStonewall Kitchen | Wells | ME | Miscellaneous Manufacturing339999 | 20-99 | ◐ LIKELY ACTIVE |
| SSStroudwater Spirits | Portland | ME | Beverage and Tobacco Product Manufacturing312140 | — | ◐ LIKELY ACTIVE |
| SSSunbelt Solomon Services-MEBE | Bethel | ME | Electrical Equipment, Appliance & Component Manufacturing335311 | 1-19 | ◐ LIKELY ACTIVE |
| SNSunmade Naturals Wine | Rumford | ME | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |