| Oxford County Mental Health Services | Health Care and Social Assistance | $485,793 | $488,154 | 79 | N/A |  Research |
| Hope Association | Health Care and Social Assistance | $479,390 | $481,987 | 112 | N/A | Research |
| Community Energy Co., Inc. | Retail Trade | $433,100 | $437,728 | 52 | $12.4M | Research |
| Mountain View Eyecare, PA | Health Care and Social Assistance | $183,300 | $184,686 | 19 | <$5M | Research |
| Mountain View Eyecare P.a. | Health Care and Social Assistance | $182,555 | $184,175 | 19 | <$5M | Research |
| Nicols Bros Logging INC | Agriculture, Forestry, Fishing and Hunting | $164,128 | $164,875 | 7 | <$5M | Research |
| Dgd Trucking | Transportation and Warehousing | $163,680 | $165,824 | 18 | <$5M | Research |
| International Management, Inc. | Professional, Scientific, and Technical Services | $122,200 | $123,164 | 15 | <$5M | Research |
| Nicols Brothers Trucking INC | Transportation and Warehousing | $113,700 | $114,411 | 7 | <$5M | Research |
| Nicols Brothers Logging, Inc. | Agriculture, Forestry, Fishing and Hunting | $113,200 | $113,927 | 9 | <$5M | Research |
| Rumford Group Homes, Inc. | Health Care and Social Assistance | $103,200 | $104,195 | 9 | N/A | Research |
| International Management INC | Professional, Scientific, and Technical Services | $91,742 | $92,254 | 8 | <$5M | Research |
| Rumford Group Homes INC | Health Care and Social Assistance | $91,205 | $92,183 | 7 | N/A | Research |
| Black Mountain of Maine | Arts, Entertainment, and Recreation | $78,512 | $79,254 | 6 | N/A | Research |
| Weber Insurance Agency of Farmington LLC | Finance and Insurance | $71,200 | $71,641 | 12 | $6.2M | Research |
| Mountain Valley Variety | Retail Trade | $70,500 | $71,283 | 20 | $6.7M | Research |
| Premium Log Yards, Inc. | Agriculture, Forestry, Fishing and Hunting | $69,000 | $69,600 | 12 | <$5M | Research |
| A & B Forestry Inc. | Agriculture, Forestry, Fishing and Hunting | $61,800 | $62,585 | 6 | <$5M | Research |
| Professional Vehicle Corporation, Inc. | Retail Trade | $61,200 | $61,635 | 14 | <$5M | Research |
| Adley Auto Sales & Service Inc. | Other Services (except Public Administration) | $60,960 | $61,406 | 8 | <$5M | Research |
| Grc INC | Other Services (except Public Administration) | $57,776 | $58,102 | 5 | <$5M | Research |
| Grc Inc. | Other Services (except Public Administration) | $54,300 | $54,713 | 6 | <$5M | Research |
| Premium Log Yards INC | Wholesale Trade | $47,158 | $47,340 | 12 | <$5M | Research |
| Black Mountain of Maine | Accommodation and Food Services | $44,100 | $44,480 | 6 | N/A | Research |
| Philip J Bretz Dmd PA | Health Care and Social Assistance | $36,288 | $36,445 | 7 | <$5M | Research |