| 4BC Construction Inc | 1 | $4,688 | Aug 23, 2023 |
| Atlantic Refrigeration of Hudson, Inc. | 1 | $1,448 | Dec 7, 2016 |
| Bailey & Smith Construction LLC | 2 | $4,500 | Sep 23, 2022 |
| Brothers Construction & Roofing, Inc. | 9 | $23,034 | May 3, 2023 |
| Charter Contracting Company LLC | 1 | $4,000 | Dec 18, 2017 |
| Commercial Water Integration Inc | 1 | $2,867 | Jun 17, 2021 |
| Concord Childrens Center | 1 | $3,000 | Jul 8, 2019 |
| Concord Housing Authority | 1 | $0 | Aug 3, 2023 |
| Concord Public Schools and Concord-Carlisle Regional School District | 5 | $0 | Sep 15, 2023 |
| Concord Restaurant Group LLC | 1 | $3,500 | Nov 30, 2022 |
| CYN Oil Corporation | 3 | $4,900 | May 6, 2015 |
| D&U Metal Roofing, Inc | 1 | $4,219 | Nov 18, 2022 |
| Delphi Construction, Inc. | 4 | $5,200 | Oct 14, 2026 |
| Detail Flooring Service Corp | 1 | $3,978 | Aug 26, 2019 |
| Duct Works Engineering, Inc. | 2 | $2,356 | Jun 11, 2018 |
| Duke & Marshal Construction & Framing | 2 | $4,000 | May 9, 2019 |
| Emerson Hospital | 17 | $53,563 | Dec 14, 2018 |
| Epm Construction Inc | 3 | $13,053 | Jan 10, 2022 |
| Feeley Brothers Roofing LLC | 4 | $18,192 | May 16, 2025 |
| FWB Construction & Carpentry, Inc. | 26 | $55,823 | Oct 1, 2024 |
| Great SKY Solar, Inc. | 6 | $18,242 | Jul 2, 2024 |
| Inriver Tank and Boat , Inc. | 1 | $2,000 | Nov 29, 2022 |
| Integrity Building & Design, Inc. | 6 | $5,900 | Aug 25, 2017 |
| J B Partitions, Inc | 4 | $9,161 | Jun 8, 2022 |
| J. Thomas Belcastro | 2 | $2,050 | Jun 23, 2021 |
| Juliana's Services, Inc. | 8 | $12,506 | Aug 25, 2017 |
| KSB Construction Services, Inc. | 1 | $1,600 | Feb 26, 2015 |
| L.V.M. Construction, Inc. | 7 | $8,612 | Jul 21, 2025 |
| Lian Home Improvement Inc | 5 | $4,000 | Aug 25, 2026 |
| Massachusetts Department of Corrections | 6 | $1,000 | Jun 9, 2026 |
| MSW Power Corporation | 3 | $6,000 | Nov 20, 2024 |
| OJ Siding Application Corp. | 1 | $2,176 | Oct 27, 2022 |
| Onyx Corporation | 4 | $18,738 | Nov 3, 2026 |
| Peak Co. Inc. | 1 | $2,176 | Sep 23, 2022 |
| Platt Builders, Inc. | 8 | $13,098 | Sep 26, 2025 |
| Quality and Perfection Inc. | 3 | $7,760 | Jul 26, 2017 |
| S.E. & D., Inc. Electrical / HVAC Contractors | 3 | $3,750 | Aug 26, 2019 |
| Sweeney Brothers Construction, LLC | 6 | $7,200 | Jul 3, 2017 |
| Top Line Roofing and Construction Corp | 4 | $14,064 | Nov 18, 2022 |
| Wellen Construction Inc | 1 | $651 | Jun 13, 2025 |