| Cattaraugus Rehabilitation Center, Inc. | Health Care and Social Assistance | $4,022,774 | $4,075,235 | 489 | N/A |  Research |
| Olean Medical Group LLP | Health Care and Social Assistance | $2,100,162 | $2,124,789 | 225 | $70.6M | Research |
| Mazza Mechanical Services, Inc. | Construction | $1,611,775 | $1,623,477 | 82 | $25.9M | Research |
| Solepoxy, Inc. | Manufacturing | $924,000 | $935,319 | 71 | $70.4M | Research |
| Southern Tier Community Health Center Network, Inc. | Health Care and Social Assistance | $890,600 | $895,480 | 98 | N/A | Research |
| Young Mens Christian Association of Olean NY and Bradford PA | Other Services (except Public Administration) | $765,817 | $776,434 | 227 | N/A | Research |
| Young Mens Christian Association of Olean NY and Bradford PA | Other Services (except Public Administration) | $750,122 | $756,513 | 344 | N/A | Research |
| Nes Bearing Company, INC | Professional, Scientific, and Technical Services | $664,750 | $668,556 | 52 | $6.4M | Research |
| Nes Bearing Company Inc. | Manufacturing | $664,750 | $673,656 | 48 | $11.7M | Research |
| Buffamante Whipple Buttafaro, PC | Professional, Scientific, and Technical Services | $653,917 | $662,714 | 47 | $15.0M | Research |
| Rick Bokman Inc. | Retail Trade | $603,960 | $610,778 | 32 | $8.1M | Research |
| Rick Bokman, Inc. | Retail Trade | $603,848 | $607,998 | 50 | $12.6M | Research |
| Mj Painting Contractor Corp | Construction | $582,580 | $557,984 | 30 | $7.6M | Research |
| Mj Painting Contractor Corp | Construction | $553,180 | $559,272 | 30 | $7.6M | Research |
| Beef 'n Barrel Inc. | Accommodation and Food Services | $507,825 | $512,430 | 50 | $8.9M | Research |
| Sanzo Beverage Company, Inc. | Wholesale Trade | $472,802 | $475,781 | 52 | $13.4M | Research |
| Ried's Market, Inc. | Retail Trade | $470,475 | $475,386 | 71 | $17.7M | Research |
| Council On Addiction Recovery Services, Inc. | Health Care and Social Assistance | $427,563 | $431,440 | 52 | N/A | Research |
| Beef N Barrel INC | Accommodation and Food Services | $362,732 | $366,349 | 68 | $12.1M | Research |
| Fox Holdings INC | Professional, Scientific, and Technical Services | $356,800 | $361,270 | 89 | $28.3M | Research |
| Orthodontists' Associates of Western New York, P.c. | Health Care and Social Assistance | $322,234 | $326,295 | 37 | $8.6M | Research |
| Orthodontists Associates of Western New York PC | Health Care and Social Assistance | $322,234 | $324,635 | 37 | $8.6M | Research |
| Eden Heights of Olean Operating LLC | Health Care and Social Assistance | $308,800 | $311,169 | 61 | $10.4M | Research |
| Directions in Independent Living, Inc. | Health Care and Social Assistance | $282,151 | $284,478 | 50 | N/A | Research |
| Total Piping Solutions, Inc. | Wholesale Trade | $266,584 | $268,103 | 25 | $7.7M | Research |