| 1 | TETRA TECH, INC. | $501,843,136 | 193 | $2,600,224 | Feb 01, 2027 | Environmental Protection … |
| 2 | EASTERN RESEARCH GROUP INC | $329,700,361 | 179 | $1,841,901 | Oct 20, 2026 | Environmental Protection … |
| 3 | PROJECT ENHANCEMENT CORPORATION | $264,058,617 | 13 | $20,312,201 | Aug 19, 2024 | Department of Labor |
| 4 | WESTON SOLUTIONS INC | $222,248,608 | 91 | $2,442,292 | Oct 21, 2026 | Environmental Protection … |
| 5 | LYNKER CORPORATION | $163,741,985 | 14 | $11,695,856 | Aug 01, 2024 | Department of Commerce |
| 6 | THE CADMUS GROUP LLC | $163,543,316 | 96 | $1,703,576 | Sep 30, 2026 | Environmental Protection … |
| 7 | ENVIRONMENTAL INCENTIVES, INC. | $151,836,635 | 6 | $25,306,106 | Sep 12, 2024 | Agency For International … |
| 8 | LOCKHEED MARTIN SERVICES, LLC | $139,903,834 | 1 | $139,903,834 | Sep 23, 2009 | Environmental Protection … |
| 9 | S C & A INC | $122,105,495 | 28 | $4,360,911 | Sep 30, 2026 | Environmental Protection … |
| 10 | GENERAL DYNAMICS INFORMATION TECHNOLOGY, IN… | $113,133,809 | 25 | $4,525,352 | Sep 25, 2026 | Environmental Protection … |
| 11 | I. M. SYSTEMS GROUP, INC. | $102,671,335 | 1 | $102,671,335 | Dec 22, 2016 | Department of Commerce |
| 12 | BOSTON GOVERNMENT SERVICES, LLC | $99,733,584 | 22 | $4,533,345 | Jul 31, 2023 | Department of Energy |
