| Two Farms, Inc. | 11 | $8,945 | Jul 11, 2022 |
| U.S. Concrete Products, LLC | 43 | $11,086 | Jan 23, 2026 |
| U.S. Department of Homeland Security | 24 | $0 | Dec 23, 2024 |
| U.S. Department of Veterans Affairs | 17 | $0 | Jan 17, 2024 |
| U.S. Postal Service | 501 | $244,103 | Aug 7, 2026 |
| U.S. Postal Service/Dda Building | 1 | $12,748 | Jul 13, 2016 |
| Unifirst Corporation | 19 | $7,105 | Mar 3, 2020 |
| Unilever Manufacturing, Inc. | 2 | $0 | Jul 2, 2015 |
| Union Electric Company LLC | 7 | $1,125 | May 23, 2017 |
| United Air Lines, Inc. | 4 | $0 | Jun 28, 2018 |
| United Kendek Services LLC | 12 | $2,800 | Apr 9, 2026 |
| United Marble & Granite, LLC | 34 | $3,000 | Nov 26, 2019 |
| United States Postal Service | 43 | $4,250 | Apr 3, 2025 |
| United States Water Mattress Corp | 5 | $869 | Jul 21, 2022 |
| United Tree Service, L.L.C. | 10 | $567 | Aug 23, 2023 |
| Universal Lightning Protection, Inc. | 3 | $862 | Mar 20, 2019 |
| University of Maryland - Baltimore | 41 | $0 | Apr 1, 2016 |
| University of Maryland Baltimore County | 21 | $0 | Sep 16, 2021 |
| Up to Date Laundry, Inc. | 6 | $1,313 | Aug 30, 2019 |
| Uplands Homebuilding, LLC | 2 | $0 | Jan 18, 2018 |
| Urban Demolition Contractors, LLC | 16 | $4,950 | May 13, 2015 |
| Urbanbuilt LLC | 16 | $5,696 | Jan 23, 2020 |
| USA Tree Services, LLC | 9 | $1,200 | Aug 10, 2021 |
| Usps Vehicle Maintenance Facility | 4 | $8,000 | Nov 16, 2015 |
| Val Construction Inc | 12 | $3,400 | Jul 16, 2026 |
| Valdez Roofing Services LLC | 11 | $5,023 | Jan 19, 2021 |
| Valley Proteins, Inc. | 28 | $12,580 | Nov 16, 2018 |
| Variety Wholesalers, Inc. | 2 | $0 | Sep 13, 2024 |
| Victory Steel Co, Inc. | 22 | $8,799 | Mar 23, 2022 |
| VJ General Contractor LLC | 19 | $13,300 | Sep 3, 2025 |
| Vulcan Materials Company | 11 | $0 | Apr 19, 2017 |
| Vves Construction LLC | 4 | $1,500 | Aug 11, 2023 |
| W.G./Welch Mechanical Contractors, L.L.C. | 1 | $0 | Aug 25, 2026 |
| W.H. Bass, Inc. | 4 | $0 | May 26, 2021 |
| W.O. Grubb Steel Erection Incorporated | 3 | $0 | Feb 29, 2024 |
| W.R. Grace & Co. - Conn. | 4 | $6,795 | May 10, 2024 |
| Walmer Paz | 8 | $4,125 | May 23, 2019 |
| Welding Engineering and Assembly Company | 35 | $2,391 | May 31, 2024 |
| WF Construction LLC | 13 | $2,980 | Oct 27, 2026 |
| White Oak Tree Experts | 3 | $0 | Mar 19, 2025 |
| Wild Leaf Holdings U.S. LLC | 18 | $11,402 | Jan 13, 2026 |
| Wilder Antonio Gonzalez Carreto | 12 | $5,700 | Aug 23, 2024 |
| Wilhelm Commercial Builders, Inc. | 25 | $10,175 | Oct 17, 2024 |
| William Anthony Brown | 8 | $4,242 | Apr 2, 2025 |
| William Emerson Ordonez | 5 | $10,012 | Apr 26, 2019 |
| William Lowery | 11 | $7,375 | Nov 7, 2022 |
| William T. King, Inc. | 3 | $0 | Oct 29, 2024 |
| Williams Crane Service, Inc. | 26 | $10,725 | Nov 19, 2024 |
| Williams Steel Erection Company Inc. | 90 | $69,372 | Aug 3, 2017 |
| Willy?S Tree Service and Landscaping, L.L.C. | 10 | $1,200 | Jan 18, 2023 |
| Wilmer Arriaza | 7 | $2,275 | Apr 23, 2025 |
| Wilmer Osorio | 8 | $2,400 | May 20, 2025 |
| Wilson Monrroy | 4 | $312 | Jan 10, 2018 |
| Window Consultants, Inc. | 1 | $0 | Dec 28, 2020 |
| Windows Solutions, LLC. | 1 | $525 | Sep 28, 2015 |
| Windsor Electric Co., Inc. | 27 | $2,395 | Jun 1, 2021 |
| Winkler's, Inc. | 19 | $4,175 | Mar 2, 2020 |
| Wood Carpentry, LLC | 38 | $25,861 | May 19, 2015 |
| Worcester Eisenbrandt, Inc. | 19 | $1,800 | Nov 29, 2023 |
| Worldwide Waterproofing and Foundation Repair Inc. | 16 | $900 | Mar 18, 2019 |
| Y & R Eastside Auto Recycling LLC | 24 | $7,680 | Jul 31, 2025 |
| Y.B.T.J. Construction, LLC | 6 | $1,650 | Dec 18, 2018 |
| Z & H Group, LLC | 11 | $1,612 | Apr 10, 2018 |
| Zelaya's Construction LLC | 3 | $150 | Feb 8, 2017 |