| M.L. McDonald Sales Company, LLC | 12 | $12,700 | Sep 7, 2022 |
| MA Brothers LLC | 3 | $3,080 | Jul 2, 2015 |
| Mainsail Management, Inc. | 3 | $2,387 | Jan 9, 2019 |
| Maloney Properties, Inc. | 2 | $9,547 | Nov 21, 2019 |
| Mama Rosie's Co., Inc. | 22 | $7,993 | Mar 28, 2019 |
| Marguerite Concrete, Inc. | 5 | $15,056 | Oct 23, 2026 |
| Maron Construction Co. Inc. | 2 | $4,900 | Jun 10, 2015 |
| Marr Equipment Corporation | 19 | $24,900 | Oct 11, 2024 |
| Marr Scaffolding Company | 17 | $7,782 | Jan 29, 2016 |
| Marshall Roofing & Sheet Metal Co., Inc. | 3 | $12,522 | Sep 19, 2022 |
| Mass Pipeline Services, Inc. | 1 | $6,400 | Aug 9, 2019 |
| Mass. Electric Construction Co. | 121 | $29,428 | Aug 21, 2018 |
| Massachusetts Bay Transportation Authority | 56 | $2,000 | Nov 3, 2026 |
| Massachusetts College of Art and Design | 3 | $0 | Sep 11, 2026 |
| Massachusetts Commission for the Blind | 4 | $0 | Sep 27, 2024 |
| Massachusetts Convention Center Authority | 4 | $0 | Jul 18, 2024 |
| Massachusetts Department of Public Health, Jamaica Plain Campus/State Public Health Laboratory | 2 | $0 | May 15, 2023 |
| Massachusetts Eye and Ear Associates, Inc | 1 | $10,050 | Apr 23, 2025 |
| Massachusetts General Hospital | 33 | $48,831 | Feb 27, 2025 |
| Massachusetts Water Resource Authority | 16 | $0 | May 23, 2024 |
| Massdot | 2 | $0 | May 23, 2023 |
| McCusker-Gill, Inc. | 8 | $8,962 | Dec 10, 2024 |
| McDonnell Roofing Company, Inc. | 6 | $4,000 | Jul 29, 2015 |
| Metric Construction of Boston Corporation | 4 | $14,118 | May 9, 2024 |
| Metro-Rise Masonry & Restoration, LLC / Metropolitan Masonry Waterproofing & Restoration, Inc. | 2 | $7,500 | May 27, 2022 |
| Metropolitan Masonry Waterproofing & Restoration, Inc. | 9 | $10,818 | Jul 28, 2015 |
| Mighty Squirrel, LLC | 2 | $9,680 | Sep 25, 2024 |
| Mirra Co., Inc. | 47 | $64,137 | Sep 10, 2022 |
| Mmif, LLC. | 2 | $5,469 | Sep 16, 2022 |
| Modern Pastry, Inc. | 4 | $2,500 | Aug 3, 2023 |
| Museum of Fine Arts | 12 | $33,445 | May 10, 2017 |
| Mutual Beef Co., Inc. | 6 | $3,400 | Jun 26, 2015 |
| N.B. Kenney Company, Inc. | 40 | $14,963 | Feb 20, 2025 |
| Nasdi, LLC | 16 | $46,250 | Jan 7, 2015 |
| National Grid | 7 | $34,877 | Apr 1, 2026 |
| National Grid USA | 2 | $23,260 | Feb 13, 2026 |
| National Railroad Passenger Corporation | 3 | $13,392 | May 5, 2023 |
| Nel Corporation | 18 | $24,025 | Nov 13, 2024 |
| Ner Construction Management, Inc. | 64 | $316,230 | Nov 3, 2026 |
| New England Casket Co, Inc. | 134 | $24,450 | Apr 14, 2015 |
| New England Construction Co., Inc. | 14 | $19,943 | Jun 8, 2023 |
| Nicholas Vacca | 2 | $9,930 | Mar 19, 2025 |
| Nor'East Services Inc. | 3 | $4,250 | Aug 30, 2021 |
| North Coast Seafoods, Corp | 57 | $37,278 | Apr 2, 2024 |
| Northeast Masonry Corporation | 5 | $8,136 | Oct 13, 2022 |
| Nstar Electric | 3 | $159,529 | Jul 12, 2022 |
| Omni Hotels & Resorts | 1 | $5,000 | Mar 9, 2026 |
| Omni Parker House | 1 | $2,000 | Oct 16, 2015 |
| One Call Ventilation, Inc. | 2 | $3,820 | Dec 3, 2015 |
| Otis Elevator Company | 103 | $74,188 | Sep 3, 2019 |
| Oxford Airport Technical Services | 5 | $32,000 | Aug 29, 2023 |
| P & F Masonry Restoration, Inc. | 7 | $8,096 | Aug 12, 2020 |
| P. Gioioso & Sons, Inc. | 222 | $716,798 | Apr 30, 2026 |
| Page Building Construction Company, Inc. | 2 | $3,364 | Jun 17, 2025 |
| Paul YU | 3 | $4,351 | Mar 8, 2022 |
| Phillip O'Connor & Dennis Scott | 5 | $9,600 | Jan 4, 2016 |
| Pier Fish Company Inc. | 12 | $9,825 | Apr 17, 2023 |
| Plant Trucking Corp | 1 | $1,000 | Dec 27, 2024 |
| Plantatum Inc. | 2 | $2,304 | May 17, 2024 |
| Poah Communities | 1 | $6,000 | May 31, 2022 |
| Powerscreen Connecticut Inc. | 3 | $9,000 | Oct 30, 2020 |
| Prince Street Ltd | 4 | $2,550 | May 13, 2015 |
| Pro Event, Inc | 5 | $10,934 | Sep 2, 2019 |
| Pure Lithium Corporation | 1 | $0 | Dec 19, 2023 |
| Quish WC Inc | 5 | $6,900 | Dec 4, 2019 |
| R. O'Connor Design Build, Inc. | 2 | $7,956 | Mar 27, 2019 |
| R.A.P. Construction, Inc | 5 | $3,474 | Oct 24, 2016 |
| Rago Veal Co. | 4 | $2,000 | Jun 13, 2025 |
| Rainbow USA Inc. | 2 | $5,783 | Dec 19, 2019 |
| Regis Steel Corp. | 16 | $21,123 | Jun 1, 2026 |
| Remote Facilities Consulting Services, Inc. | 1 | $500 | Aug 9, 2024 |
| Rent-A-Center, Inc | 7 | $4,110 | Dec 14, 2015 |
| Restaurant Associates | 1 | $0 | Jun 3, 2026 |
| Revolutionary Spaces, Inc. | 3 | $1,500 | May 28, 2025 |
| Revvity Health Services, Inc. | 1 | $4,000 | Jan 17, 2024 |
| Richard Haverty | 9 | $15,873 | Oct 7, 2016 |
| Riley Brothers LLC | 11 | $17,721 | Sep 9, 2026 |
| RJV Construction, Corp. | 32 | $75,234 | Jan 27, 2020 |
| Robell Excavating | 3 | $3,676 | Oct 25, 2022 |
| Robert Russo | 1 | $3,978 | Jul 15, 2019 |
| Roxbury Community College | 5 | $0 | Sep 10, 2026 |
| Royal Label, Inc. | 3 | $6,895 | Jan 28, 2019 |
| RS Cleaning Service Inc | 2 | $2,500 | Apr 1, 2024 |
| RW&SA Services Corp | 3 | $8,080 | Nov 18, 2021 |
| S & F Concrete | 22 | $18,950 | Apr 30, 2018 |
| S & F Concrete Contractors, Inc. | 101 | $93,036 | Sep 1, 2026 |
| S.J. Services | 2 | $28,135 | Feb 9, 2026 |
| S.O.S. Corporation | 7 | $16,116 | Oct 25, 2022 |
| Saks Fifth Avenue LLC | 11 | $23,802 | Feb 10, 2022 |
| Salguero Masonry Corp | 4 | $13,640 | Dec 9, 2025 |
| Salvucci Masonry Company, Inc. | 16 | $34,800 | Oct 30, 2018 |
| Samuel Holmes Inc | 17 | $17,400 | Sep 1, 2023 |
| Saugus Construction Corporation | 11 | $202,000 | May 12, 2015 |
| Savin Brands LLC | 3 | $1,376 | Nov 21, 2019 |
| Schnabel Foundation Company | 3 | $200,962 | Jul 11, 2017 |
| Sea & Shore Contracting, Inc. | 12 | $14,325 | Feb 9, 2023 |
| Sea-Dar Enterprises, Inc. | 1 | $1,020 | Mar 24, 2026 |
| Sea-Dar Enterprises, Inc. dba Sea-Dar Construction Company | 1 | $7,985 | May 31, 2022 |
| Sean Whelan Contracting Service Inc. | 4 | $5,844 | May 2, 2017 |
| Selhi Associates, LLC | 1 | $2,867 | Apr 15, 2021 |
| Semper Diving & Marine, Corp. | 20 | $13,200 | Sep 27, 2019 |
| Shanti Acquisition LLC. | 1 | $2,892 | Aug 5, 2020 |
| Shiloh Steel Erectors, Inc. | 3 | $13,500 | Jun 11, 2015 |
| Skinner Services Inc | 11 | $28,962 | Oct 1, 2021 |
| SKY Safety, Inc. / HI-Rise, Inc. | 8 | $70,000 | Oct 23, 2023 |
| SMS Services Inc. | 8 | $16,182 | Aug 19, 2024 |
| Southside Development LLC | 3 | $4,900 | Jan 29, 2015 |
| Southwest Airlines Co. | 2 | $4,106 | Sep 17, 2019 |
| Spike, Inc. dba Olympia Moving & Storage | 1 | $1,000 | Feb 1, 2018 |
| Spinelli Ravioli Manufacturing Co., Inc. | 2 | $1,500 | Apr 9, 2015 |
| ST. Michael Cemetery Corporation | 1 | $0 | Aug 29, 2023 |
| State Electric Corporation | 11 | $24,850 | Apr 17, 2026 |
| Stavis Seafoods LLC | 52 | $207,492 | Jun 9, 2021 |
| Steelman Productions | 3 | $0 | Sep 2, 2019 |
| Steve Connolly Seafood Company, Inc. | 15 | $4,963 | Feb 26, 2025 |
| Steven McCarthy | 2 | $2,634 | Mar 24, 2021 |
| Stone & Skillet LLC | 3 | $6,454 | Jul 31, 2024 |
| Structures Derek International, S.A. | 4 | $17,322 | Feb 17, 2023 |
| Suffolk Construction Company | 298 | $462,698 | Jul 22, 2026 |
| Sullivan & McLaughlin Companies, Inc. | 12 | $35,205 | Oct 30, 2024 |
| Sunrise Erectors, Inc. | 22 | $44,095 | Dec 1, 2025 |
| Supreme Carpentry LLC | 8 | $22,420 | Apr 16, 2025 |
| Synergy Financial, LLC | 1 | $7,168 | Apr 28, 2021 |
| T & T Electrical Contractors, Inc | 12 | $28,625 | Jun 8, 2020 |
| Tara Construction, Inc. | 28 | $37,555 | Aug 24, 2022 |
| The AD Group Co. | 1 | $1,986 | Apr 17, 2026 |
| The Boston Globe | 32 | $19,630 | Feb 13, 2015 |
| The Cheviot Corporation | 14 | $5,788 | Sep 1, 2026 |
| The Edgar P. Benjamin Healthcare Center, Inc. | 5 | $12,612 | Nov 7, 2024 |
| The Follett Company Incorporated | 10 | $12,011 | Jul 9, 2024 |
| The Roof Kings LLC | 42 | $119,800 | Nov 20, 2024 |
| The Salem Glass Co | 47 | $27,253 | Feb 8, 2021 |
| The Waterproofing Company, LLC | 43 | $13,338 | Sep 26, 2023 |
| The Wendy's Company | 11 | $26,036 | Jun 26, 2019 |
| Thermo-Dynamics International, Inc. | 1 | $1,890 | Mar 20, 2015 |
| Thomas Services, Inc. | 4 | $6,000 | Aug 30, 2021 |
| Tishman Construction Corporation | 11 | $23,200 | Jan 29, 2021 |
| Tony Tran Brother Construction | 6 | $6,020 | Oct 28, 2024 |
| Trevi Icos Corporation | 30 | $44,110 | Nov 16, 2023 |
| Trial Court Facilities Management and Capital Planning Department | 7 | $0 | Jul 17, 2026 |
| Trico USA, LLC | 6 | $17,378 | Apr 17, 2026 |
| Turner Construction Company | 374 | $130,669 | May 5, 2025 |
| TY Gupta | 3 | $3,326 | Feb 20, 2018 |
| U Call we Haul LLC | 4 | $7,200 | Jun 17, 2016 |
| Umbro & Sons Construction Corp. | 35 | $29,300 | Sep 4, 2019 |
| Unified Construction Group, LLC | 2 | $15,000 | Apr 17, 2026 |
| Union Construction, Inc. | 8 | $6,692 | May 15, 2018 |
| Uniqlo USA, LLC | 4 | $26,675 | Apr 20, 2018 |
| United HVAC Co., Inc. | 3 | $7,350 | Aug 18, 2022 |
| Unitedwor VM Contractor Corp | 5 | $11,750 | Jul 15, 2026 |
| University of Massachusetts Boston | 4 | $0 | Oct 19, 2026 |
| Upper Spectacle, LLC | 2 | $3,000 | Apr 1, 2024 |
| US Department of Health and Human Services Oig 8Hhig1001 | 5 | $0 | Apr 29, 2026 |
| US Postal Service | 3 | $20,525 | Apr 3, 2023 |
| Vertex Pharmaceuticals Incorporated | 3 | $10,688 | Apr 24, 2025 |
| Veterans Administration Medical Center | 123 | $0 | Aug 2, 2016 |
| Vicinity Energy, LLC | 3 | $14,500 | Oct 15, 2021 |
| W E Master Construction Inc | 1 | $1,674 | Jan 14, 2025 |
| W. T. Rich Company, Inc | 36 | $25,334 | Feb 28, 2025 |
| Waldo Bros. Company | 7 | $6,976 | Jul 16, 2019 |
| Waldron Contracting Services Inc | 1 | $0 | Nov 22, 2024 |
| Walnut Willow, LLC | 2 | $1,500 | Apr 12, 2018 |
| Walsh Brothers, Incorporated | 88 | $63,310 | Jun 12, 2026 |
| Watertown Ironworks, Inc. | 5 | $1,500 | Jul 20, 2016 |
| Wayne Roofing Systems, LLC | 36 | $14,197 | Jul 19, 2023 |
| Wci Corp. | 5 | $4,000 | Sep 19, 2019 |
| Wes Construction Corp. | 36 | $44,225 | Aug 6, 2025 |
| West Roxbury Chicken LLC | 1 | $1,000 | Jul 10, 2025 |
| Western Carpentry, and Contracting Inc. | 3 | $3,741 | Jun 17, 2016 |
| William & Co. Foods, Inc. | 1 | $10,151 | Jan 24, 2022 |
| Wyndham Hotels and Resorts, LLC | 4 | $6,000 | Aug 23, 2016 |
| YHL Construction, LLC. | 1 | $1,989 | Apr 17, 2019 |
| Youthbuild Boston, Inc. | 2 | $3,104 | May 8, 2018 |