| Atkinson Staffing Inc. | Administrative and Support and Waste Management | $4,233,278 | $4,280,598 | 283 | $44.5M |  Research |
| Senske Lawn & Tree Care, INC | Administrative and Support and Waste Management | $4,145,600 | $4,200,345 | 470 | $101.8M | Research |
| Cadwell Industries INC | Manufacturing | $3,566,117 | $3,607,249 | 175 | $45.8M | Research |
| Lampson International, LLC | Real Estate and Rental and Leasing | $2,953,513 | $2,986,932 | 173 | $78.2M | Research |
| Adams Tri Cities Ent | Accommodation and Food Services | $2,933,600 | $3,178,432 | 500 | $88.8M | Research |
| Agrilabor INC | Administrative and Support and Waste Management | $2,361,609 | $2,294,535 | 158 | $24.9M | Research |
| Goodwill Industries of the Columbia | Other Services (except Public Administration) | $2,172,500 | $2,202,320 | 386 | N/A | Research |
| I.w. International Insulation Incorporated | Construction | $2,036,300 | $2,059,322 | 161 | $40.7M | Research |
| Tri City Orthopaedic Clinic Psc | Health Care and Social Assistance | $2,009,900 | $2,036,587 | 91 | $28.6M | Research |
| Cazier Enterprises Inc. | Accommodation and Food Services | $2,000,000 | $2,018,027 | 287 | $51.0M | Research |
| Cadwell Industries INC | Manufacturing | $2,000,000 | $2,021,918 | 176 | $49.1M | Research |
| Evergreen Agricultural Services LLC | Agriculture, Forestry, Fishing and Hunting | $1,980,557 | $1,990,075 | 197 | $9.9M | Research |
| Finley Cherries LLC | Agriculture, Forestry, Fishing and Hunting | $1,476,800 | $1,491,608 | 131 | $13.4M | Research |
| Cazier Enterprises Inc. | Accommodation and Food Services | $1,456,400 | $1,469,727 | 352 | $62.5M | Research |
| Djc Automotive, Inc. | Retail Trade | $1,435,385 | $1,416,728 | 110 | $27.7M | Research |
| West One Automotive Group INC | Retail Trade | $1,415,739 | $1,431,099 | 102 | $25.7M | Research |
| Bruce Mechanical INC | Construction | $1,351,800 | $1,369,392 | 60 | $19.0M | Research |
| Hpm Corporation | Health Care and Social Assistance | $1,344,700 | $1,358,184 | 67 | $18.1M | Research |
| West One Automotive Group Inc. | Real Estate and Rental and Leasing | $1,342,660 | $1,356,798 | 129 | $58.3M | Research |
| Columbia Industries | Health Care and Social Assistance | $1,310,465 | $1,326,693 | 201 | $32.6M | Research |
| Evergreen Agricultural Services, LLC | Public Administration | $1,279,000 | $1,289,907 | 195 | N/A | Research |
| Watts Construction Inc. | Construction | $1,268,390 | $1,274,063 | 70 | $21.7M | Research |
| Columbia Industries | Health Care and Social Assistance | $1,258,695 | $1,268,282 | 100 | $16.2M | Research |
| Kennewick Industrial and Elect | Retail Trade | $1,077,145 | $1,095,008 | 84 | $17.3M | Research |
| Heritage Professional Landscaping, Inc. | Professional, Scientific, and Technical Services | $1,029,100 | $1,036,332 | 283 | $57.0M | Research |