| Luis Fernandez dba Luis Fernandez | 2 | $5,000 | Jul 15, 2026 |
| Luis Lopez dba HQ Construction | 11 | $14,500 | Jan 8, 2026 |
| Lukasz or Construction, Corp. | 2 | $9,678 | Jul 1, 2024 |
| Lukasz Zochowski dba Luke | 10 | $6,780 | Jun 25, 2018 |
| Luse Thermal Technologies, LLC | 10 | $40,700 | Dec 15, 2020 |
| Luster Products, Inc. | 7 | $33,319 | Jun 24, 2022 |
| Luxury Motors of Chicago, Inc. | 1 | $4,500 | Jan 14, 2026 |
| Lyon & Healy Corporation | 8 | $16,128 | Mar 19, 2024 |
| M M Pro Services Inc. | 11 | $7,700 | Nov 12, 2021 |
| M R C Contractors, Inc. | 6 | $6,500 | May 9, 2019 |
| M&M Contractors Inc. | 5 | $6,320 | Feb 10, 2025 |
| M. Cannon Roofing Company LLC | 6 | $6,000 | Jun 16, 2016 |
| M. Difoggio Plumbing & Sewer Contractors, Inc. | 2 | $5,600 | Apr 1, 2016 |
| M.B.B. Enterprises of Chicago, Inc. | 63 | $45,138 | Jun 2, 2026 |
| M.G.K. Roofing & Construction Corporation | 4 | $18,900 | Mar 9, 2021 |
| M.Q. Sewer & Water Contractors, Inc. | 5 | $2,680 | Oct 16, 2018 |
| M.Q. Sewer & Water Contractors, Inc. dba M.Q. Construction Company | 2 | $4,634 | Jul 24, 2026 |
| M.S.R.C. Services, Inc. | 3 | $4,500 | May 29, 2019 |
| M.W. Powell Company | 10 | $9,586 | Apr 28, 2015 |
| Mac Manufacturing dba Saturn Manufacturing dba Aeronautical Electric | 9 | $20,720 | Sep 11, 2025 |
| Mack Construction Services, LLC | 2 | $6,500 | Aug 22, 2024 |
| Madden Sewerage & Drainage, Inc. | 17 | $39,800 | Jan 11, 2022 |
| Maestro Cargo International | 1 | $0 | Nov 19, 2020 |
| Magenta LLC | 30 | $43,450 | Apr 20, 2023 |
| Mahzel Metals, Inc. | 7 | $9,410 | Jun 9, 2021 |
| Makowski Real Sausage, Inc. | 5 | $8,000 | Mar 29, 2023 |
| Malvaes Solutions, Incorporated | 5 | $18,000 | Mar 17, 2021 |
| Mangan Construction and Development, Inc. | 7 | $5,400 | Nov 16, 2018 |
| Manuel Arriaga dba Manuel Arriaga | 4 | $11,101 | Aug 21, 2025 |
| Manuel Lara dba Lara Construction | 14 | $7,975 | Jun 3, 2016 |
| Marcus Inias | 2 | $1,904 | Aug 15, 2016 |
| Marek Sanik | 5 | $5,887 | Mar 19, 2019 |
| Margarito Vargas dba Armando's Construction | 6 | $8,193 | Apr 7, 2021 |
| Margolin Shoes, Inc. | 6 | $24,500 | Sep 7, 2018 |
| Maria V Contracting, Inc. | 5 | $10,000 | Aug 13, 2018 |
| Mariano's Garage Doors & Construction Incorporated | 3 | $10,370 | Nov 7, 2024 |
| Marine Technologies Solutions LLC | 1 | $957 | May 14, 2019 |
| Marine Technology Solutions LLC | 2 | $26,988 | Dec 30, 2019 |
| Mario Alberto Mendez | 2 | $9,376 | Sep 1, 2023 |
| Mark 1 Restoration Company | 18 | $35,659 | Jul 8, 2025 |
| Markpol Remodeling, Inc. | 7 | $7,000 | Dec 5, 2024 |
| Maron Electric Company | 39 | $61,542 | May 19, 2023 |
| Marqueece's Construction, Inc. | 1 | $1,741 | Dec 8, 2021 |
| Martel General Construction | 8 | $11,409 | Aug 23, 2017 |
| Martin Araujo dba Araujo Construction Corp., | 19 | $265,868 | Oct 30, 2026 |
| Martino's Construction Co., Inc. | 6 | $6,000 | May 1, 2018 |
| Maruichi Leavitt Pipe & Tube, LLC | 7 | $44,969 | Jan 23, 2019 |
| Masonry One, Inc. | 7 | $10,230 | Mar 26, 2019 |
| Masonry, Inc. | 35 | $29,380 | May 16, 2018 |
| Master Group Construction, Inc. | 14 | $13,500 | Apr 11, 2025 |
| Master Restoration, Inc. | 17 | $32,273 | Apr 24, 2019 |
| Mastership Construction Co | 38 | $27,380 | Jul 22, 2022 |
| Matthew Warren, Inc. dba Automatic Spring Coiling, Co. | 2 | $8,450 | Sep 8, 2017 |
| Matthews Roofing Company, Inc. | 56 | $130,626 | Nov 19, 2024 |
| Mauser Packaging Solutions dba Meyer Steel Drum, Inc. | 2 | $11,366 | Mar 24, 2023 |
| Mauser USA, LLC dba Mauser Packaging Solutions | 1 | $13,653 | May 4, 2021 |
| Max Construction, Inc. | 12 | $25,120 | Apr 23, 2018 |
| Maxx Paving & Concrete, Inc. | 5 | $10,800 | Jun 10, 2016 |
| Maya Masonry, Inc. | 20 | $19,390 | Jun 22, 2022 |
| MBJ Construction Services, Inc. | 2 | $2,400 | Jan 30, 2015 |
| Mc Donagh Demolition Inc. | 13 | $30,536 | Jul 25, 2025 |
| McCracken Label Co. | 4 | $20,000 | Nov 21, 2023 |
| McDonagh Construction LLC | 2 | $930 | Aug 23, 2023 |
| McDonagh Contractors, LLC | 10 | $41,602 | May 14, 2019 |
| McDonald Construction | 3 | $6,000 | Dec 10, 2024 |
| McHugh Concrete Construction, Inc. | 4 | $22,131 | May 18, 2026 |
| MCM Management Corp | 1 | $13,494 | Dec 30, 2019 |
| McNally Construction, Inc. | 18 | $60,071 | Apr 1, 2025 |
| McVan Development, LLC | 1 | $3,880 | Feb 27, 2018 |
| MDC Builders Inc. | 3 | $5,200 | Feb 19, 2016 |
| Mead Fluid Dynamics, Inc. | 54 | $13,612 | Feb 14, 2018 |
| Meade Electric Company, Inc. | 99 | $35,488 | Jun 17, 2024 |
| Meath Masonry Corp. | 8 | $8,833 | Sep 11, 2025 |
| Meccor Industries, Ltd. | 19 | $6,349 | Feb 20, 2026 |
| Medardo Gonzalez Flores dba Eduardo Flores dba Gonzalez General Construction | 2 | $3,000 | Mar 15, 2022 |
| Mercury Plastics, Inc. | 4 | $5,130 | Jun 16, 2025 |
| Merz Apothecary | 2 | $4,200 | Apr 5, 2022 |
| Meskan Management Company L.L.C. dba Meskan Foundry | 2 | $6,500 | Apr 17, 2026 |
| Metal Pro Company | 1 | $4,839 | Dec 12, 2023 |
| Method Construction LLC | 18 | $16,543 | May 20, 2021 |
| Metropolis Coffee Company, LLC dba Metropolis Coffee Company - Factory Store & Roasterie | 4 | $12,098 | May 3, 2024 |
| Metropolitan Fire Protection, Inc. | 4 | $7,097 | Dec 11, 2018 |
| Metropolitan Steel, Inc. | 17 | $21,387 | Jul 13, 2020 |
| Metropolitan Water Reclamation District of Greater Chicago - Calumet Water Reclamation Plant | 4 | $0 | Aug 31, 2018 |
| Meyer Steel Drum, Inc. | 61 | $79,232 | Jul 13, 2017 |
| MFW Enterprises, Inc. | 6 | $3,600 | Sep 15, 2015 |
| MG Bros Construction, Inc. | 5 | $8,500 | Nov 27, 2017 |
| Michael Betke dba Betke Construction, Inc. | 8 | $13,573 | Jul 26, 2021 |
| Michal Bojdo | 7 | $9,180 | Aug 15, 2018 |
| Mickey's Linen and Towel Supply, Inc. | 2 | $500 | Dec 3, 2019 |
| Mid City LLC | 3 | $1,109 | Oct 18, 2018 |
| Midland Engineering Company, Inc. | 10 | $19,740 | Apr 22, 2019 |
| Midway Dodge, Incorporated II | 9 | $18,274 | Apr 7, 2022 |
| Midway Industries, Inc. | 15 | $29,114 | Apr 19, 2024 |
| Midway Wholesalers, Inc. | 2 | $15,809 | Mar 20, 2024 |
| Midwest Canvas Corporation | 143 | $314,606 | Sep 15, 2021 |
| Midwest Carpet and Flooring, Inc. | 5 | $30,000 | Apr 23, 2021 |
| Midwest Drywall & Acoustical Co., Inc. | 3 | $2,716 | Apr 13, 2017 |
| Midwest Manufacturing and Distributing, Inc. | 7 | $5,365 | Jul 1, 2015 |
| Midwest Manufacturing and Distributing, Inc. dba Midwest Metal Forming | 4 | $57,000 | Sep 23, 2016 |
| Midwest Masonry, Inc. | 73 | $232,746 | Aug 24, 2023 |
| Midwest Pressure Washing and Restoration, Inc. dba Restoreworks Masonry Restoration | 4 | $17,500 | Sep 3, 2025 |
| Midwest Restoration Group, Inc. | 6 | $14,507 | Sep 15, 2016 |
| Mietus Restoration Inc. | 6 | $7,900 | Jun 24, 2015 |
| Mike Quality Express Construction Inc. | 7 | $13,411 | May 9, 2023 |
| Mike Smith dba Quality Roofing & Tuckpointing Inc. | 4 | $4,445 | Nov 16, 2020 |
| Millennium Contracting Co. | 10 | $62,549 | Jul 10, 2025 |
| Mills Pallet, Inc. | 8 | $10,352 | Mar 23, 2017 |
| Minero's Construction | 4 | $7,265 | Jan 22, 2020 |
| Miranda's Construction & Development Corp. | 13 | $31,297 | Mar 6, 2025 |
| Miron Exteriors, Inc. | 3 | $10,538 | Mar 9, 2017 |
| Miron Masonry & Construction, Inc. | 15 | $10,400 | Dec 28, 2016 |
| Mitchell Development Consultants, Inc. | 2 | $2,387 | Mar 1, 2019 |
| Miter Construction & Remodeling, Inc. | 3 | $4,688 | Oct 17, 2023 |
| Mix Brick & Stone, Inc. | 3 | $3,920 | Apr 11, 2016 |
| ML Group Design and Development, LLC | 1 | $6,630 | Sep 11, 2019 |
| MMG Remodeling & Construction, Inc. | 3 | $32,133 | May 23, 2022 |
| Modern Process Equipment, Inc. | 9 | $9,360 | Jan 4, 2023 |
| Moesle Meat Distribution LLC | 3 | $17,923 | Aug 12, 2025 |
| Moments Notice Services LLC | 1 | $1,521 | Jan 16, 2018 |
| Monarch Builders & Contractors Inc. | 1 | $2,000 | Apr 25, 2024 |
| Monda Industrials LLC dba Monda Windows & Doors Manufacturing | 1 | $6,000 | Sep 9, 2022 |
| Monday Security Corporation | 9 | $10,139 | Nov 2, 2023 |
| Mondelez Global LLC | 3 | $15,660 | Mar 21, 2024 |
| Mondelez International, Inc | 1 | $8,000 | Dec 29, 2016 |
| Montemayor Construction, Inc. | 15 | $18,442 | Nov 2, 2022 |
| Montgomery Construction Inc. | 14 | $15,319 | Sep 9, 2018 |
| Moonlite Tuckpointing, LLC | 1 | $4,096 | Apr 5, 2021 |
| Morales Construction, Inc. | 7 | $10,482 | Nov 3, 2023 |
| Moreno Construction Company LLC | 7 | $6,035 | Mar 11, 2019 |
| Morfin Construction General Carpentry, Inc. | 6 | $18,750 | Aug 24, 2023 |
| Moriarty Sewer & Water, Inc. | 6 | $8,400 | May 24, 2016 |
| Morning, Noon & Night Plumbing & Sewer Service, Inc. | 7 | $10,040 | Mar 19, 2015 |
| Moses King, JR. dba Moses King, LLC | 4 | $12,500 | Jan 12, 2023 |
| Mount Sinai Resale Shop | 2 | $0 | Aug 21, 2025 |
| MP1 Masonry Corp. | 1 | $0 | Mar 10, 2020 |
| MPZ Masonry Inc. | 32 | $19,272 | May 19, 2022 |
| MR. Swifty Cleaners, Inc | 5 | $1,200 | Jun 7, 2016 |
| MR. Trade LLC | 4 | $9,500 | Jun 23, 2025 |
| MRC Polymers, Inc. | 25 | $24,920 | May 23, 2024 |
| MS Home Development Inc. | 6 | $9,503 | Oct 27, 2022 |
| Msa Construction, Inc. | 6 | $9,250 | Feb 1, 2021 |
| MSF Construction Inc. | 1 | $2,610 | Aug 4, 2022 |
| MSM Solutions, Inc | 1 | $0 | Aug 18, 2015 |
| Mudel Carpentry Group, Inc. | 2 | $1,960 | Dec 9, 2015 |
| Mudel Construction Group Inc. | 1 | $0 | Dec 21, 2016 |
| Murphy & Miller, Inc. | 9 | $2,195 | Mar 4, 2015 |
| Murphy Construction | 9 | $7,230 | Jan 21, 2015 |
| MVP Restoration Inc. | 8 | $8,300 | Nov 16, 2018 |
| N & a Construction and Development, LLC | 4 | $622 | May 25, 2018 |
| Napuck Salvage of Waupaca, LLC | 9 | $17,500 | Apr 11, 2016 |
| Nash Brothers Construction Company, Inc. | 20 | $19,226 | Feb 7, 2022 |
| Nataz Specialty Coatings, Inc. | 6 | $7,099 | May 3, 2017 |
| Nation's Best - Illinois, LLC dba Crafty Beaver Home Center Holdings LLC | 3 | $15,000 | Feb 12, 2024 |
| National Container Group LLC. dba Mauser Packaging Solutions | 2 | $13,000 | Jun 7, 2023 |
| National Heat & Power Corp. | 39 | $10,375 | May 16, 2023 |
| National Material Processing, LLC | 4 | $30,000 | Dec 15, 2022 |
| National Office Liquidators, LLC | 1 | $2,273 | Jul 2, 2019 |
| National Piping System, Inc. | 3 | $2,690 | Jun 23, 2021 |
| National Railroad Passenger Corporation | 85 | $22,715 | Feb 9, 2026 |
| National Railroad Passenger Corporation dba Amtrak | 1 | $10,000 | Nov 12, 2019 |
| Naylor Pipe Company | 76 | $19,589 | Aug 25, 2026 |
| NDP Electric, Inc. | 1 | $4,800 | May 11, 2017 |
| Neiman Bros. Co., Inc. | 2 | $1,000 | Feb 25, 2026 |
| Network Property Services, Inc. | 2 | $2,400 | Aug 16, 2021 |
| New Development, Inc. | 4 | $4,350 | Jul 26, 2017 |
| New Horizon Steel, LLC | 1 | $7,300 | Jun 6, 2024 |
| Newly Weds Foods, LLC | 50 | $88,316 | Oct 6, 2026 |
| Newtec Window & Door, Inc. | 3 | $4,260 | Oct 16, 2019 |
| Nicholas Stevens dba Citywide Roofing | 5 | $10,297 | Jun 10, 2021 |
| Nickelson Industrial Service, Inc. | 38 | $32,898 | Jun 14, 2018 |
| Nieroda Construction Incorporated | 20 | $49,381 | Jul 26, 2022 |
| NJM Exteriors PLLC | 5 | $5,364 | Oct 16, 2026 |
| No Doubt Construction Inc. | 2 | $3,360 | Mar 11, 2016 |
| Noa Masonry | 1 | $1,870 | Nov 4, 2016 |
| Nombach Company, Inc. | 5 | $18,038 | Jan 4, 2024 |
| Nombach Company, Inc. dba Nombach Roofing & Tuckpointing | 4 | $10,917 | Apr 16, 2019 |
| Noodles & Company | 1 | $9,239 | Jan 25, 2019 |
| Norman Mechanical, Inc. | 17 | $14,550 | Sep 26, 2017 |
| North America Stevedoring Company, LLC | 7 | $52,775 | Jun 2, 2025 |
| North Creek Builders, LLC | 3 | $2,173 | Sep 20, 2017 |
| North Midwest Builders, Inc. | 3 | $5,762 | Oct 3, 2022 |
| North Shore Framing Inc. | 17 | $188,617 | Dec 14, 2023 |
| North Shore Underground, Inc. dba North Shore Sewerage Drainage and Plumbing | 2 | $4,858 | Jan 21, 2020 |
| North South Masonry & Tuckpointing, Inc. | 28 | $20,824 | Jul 5, 2023 |
| Northwest Suburban Municipal Joint Action Water Agency | 3 | $0 | May 27, 2021 |
| Northwestern Memorial Hospital | 54 | $30,872 | May 16, 2024 |
| NPL Construction Co. | 1 | $0 | Apr 16, 2026 |
| NRC, LLC dba NRC Construction | 1 | $1,100 | Dec 8, 2017 |
| Nyco Products Company | 3 | $7,500 | Jan 16, 2025 |
| O & K American Corp | 17 | $18,295 | Jul 29, 2024 |
| O'Malley Construction Company, Inc. | 2 | $4,410 | Feb 29, 2016 |
| O'Malley Quality Construction, Inc. | 19 | $58,720 | Jun 19, 2018 |
| O'Sullivan Plumbing, Inc. | 2 | $11,200 | Oct 23, 2015 |
| Oaxaca Roofing, Corp. | 6 | $24,000 | Aug 24, 2021 |
| OG Plumbing LLC | 33 | $493,634 | Jan 4, 2024 |
| Ogden Foods, LLC | 1 | $1,000 | Oct 16, 2017 |
| Old Timber Construction, Inc. | 6 | $13,000 | Oct 13, 2020 |
| Old Veteran Construction, Inc. | 20 | $13,245 | Jul 2, 2015 |
| Old World Stone, LLC | 13 | $11,250 | Feb 8, 2024 |