| L. Johnson Tree Service, LLC | 24 | $8,079 | May 27, 2026 |
| L. R. Willson & Sons, Inc. | 75 | $91,896 | Jun 4, 2025 |
| L.J. Brossoit & Sons, Inc. | 25 | $4,991 | Jul 31, 2019 |
| Lafarge North America Inc. and Its Successors | 6 | $0 | Aug 21, 2019 |
| Lafarge North America, Inc. and Its Successor, Holcim (US) Inc. | 8 | $12,355 | Nov 15, 2022 |
| Latin Technicians Network LLC | 3 | $1,125 | Jun 8, 2018 |
| Layher, Inc. | 8 | $3,750 | Oct 5, 2022 |
| Len Home Design Inc | 2 | $662 | Apr 21, 2023 |
| Leonard A. Kraus Co., Inc. | 108 | $17,246 | Aug 14, 2025 |
| Lewis Brothers, Incorporated | 5 | $520 | Jul 8, 2026 |
| Ligon & Ligon, Incorporated | 19 | $17,070 | Dec 18, 2025 |
| Load 4 Load, LLC | 7 | $1,062 | Sep 21, 2021 |
| Logistec | 2 | $0 | Jan 14, 2026 |
| Lopez Express Construction, Inc | 3 | $1,512 | Sep 7, 2021 |
| Lopez Painting Inc | 10 | $3,600 | May 16, 2024 |
| Lowery Construction Co., Inc. | 37 | $6,899 | Feb 8, 2019 |
| Luciano Cristofaro Contractors, Inc. | 8 | $0 | Feb 26, 2024 |
| Luis Antonio Falcon Guaman | 6 | $5,100 | Mar 31, 2023 |
| Luis Herrera | 9 | $12,450 | Jul 21, 2021 |
| Luis Sanchez | 8 | $2,311 | Nov 30, 2018 |
| Luis, Inc. | 7 | $512 | Jul 16, 2024 |
| Luise Falcon | 20 | $6,925 | Jun 25, 2024 |
| Luris Galloway | 5 | $275 | Mar 1, 2023 |
| M & L Construction Group LLC | 3 | $450 | Sep 16, 2019 |
| M. Javier Salvador | 14 | $2,162 | Feb 26, 2016 |
| M.&.D Home Service, LLC | 15 | $7,500 | Dec 6, 2024 |
| M.A. General Construction, LLC | 2 | $375 | Oct 1, 2018 |
| M.G.P Construction, Inc. | 2 | $262 | Jul 15, 2015 |
| M3 Contracting, LLC | 20 | $6,710 | Jul 6, 2026 |
| Machado Construction Company, Inc. | 47 | $8,960 | Feb 12, 2018 |
| Madison Mechanical Contracting, LLC | 4 | $0 | Oct 1, 2025 |
| Madrag of Mondawmin, LLC | 1 | $0 | Oct 10, 2025 |
| Mahon Plumbing, Incorporated | 21 | $7,731 | Dec 10, 2020 |
| Main Level Contractor Corp. | 8 | $3,312 | Mar 23, 2021 |
| Mainstreet 407 Glazing LLC | 5 | $1,350 | Oct 29, 2024 |
| Malill,LLC. | 6 | $550 | Jan 4, 2019 |
| Malstrom Electric, Inc. | 18 | $2,047 | Feb 12, 2020 |
| Manekin Construction, LLC | 10 | $2,301 | Oct 8, 2021 |
| Marcos Souza | 17 | $4,800 | Jan 31, 2024 |
| Mariano Quinteros | 2 | $1,050 | Mar 21, 2017 |
| Mario Garcia Estrada | 4 | $946 | Feb 21, 2023 |
| Mario Hernandez Medina | 8 | $1,200 | Mar 2, 2021 |
| Mario Perez | 8 | $4,200 | Jun 4, 2015 |
| Maritime Applied Physics Corporation | 17 | $3,392 | Mar 7, 2024 |
| Marjorie Roofing, LLC | 31 | $40,361 | Oct 3, 2025 |
| Mark Buttons Chimney Sweeps, Inc. | 3 | $1,260 | Jul 6, 2016 |
| Mark C Ayres | 2 | $87 | Dec 19, 2024 |
| Mark Foltz | 6 | $1,050 | Feb 13, 2017 |
| Marlin Lighting, LLC | 4 | $3,900 | Mar 31, 2015 |
| Marocco Construction Co., Inc. | 23 | $3,295 | Mar 21, 2017 |
| Marvin Escobar | 5 | $750 | Jul 23, 2015 |
| Marvin Lopez | 6 | $2,550 | Aug 7, 2024 |
| Maryland Department of Health and Mental Hygiene | 11 | $0 | Sep 1, 2016 |
| Maryland Department of Juvenile Services | 21 | $0 | Mar 21, 2025 |
| Maryland Department of Public Safety & Correctional Services | 8 | $0 | Mar 31, 2026 |
| Maryland Department of the Environment | 24 | $0 | Mar 4, 2021 |
| Maryland Heating & Air LLC | 3 | $900 | Feb 26, 2015 |
| Maryland LR Garcia Construction Inc | 34 | $12,535 | Dec 8, 2023 |
| Maryland Metals Processing, Inc. | 55 | $20,170 | Jun 15, 2016 |
| Maryland Reception, Diagnostic and Classification Center | 2 | $0 | Apr 28, 2022 |
| Maryland State Department of Education | 12 | $0 | Aug 5, 2022 |
| Maryland State Police | 23 | $0 | Dec 1, 2022 |
| Maryland Transit Administration | 80 | $1,785 | Oct 2, 2026 |
| Maryland Transportation Authority | 132 | $4,100 | Aug 20, 2026 |
| Maryland Transportation Authority dba Fort McHenry Tunnel Maintenance | 6 | $0 | Aug 9, 2019 |
| Mass Transit Administration | 63 | $0 | Jul 29, 2022 |
| Master Carpentry Inc. | 74 | $53,238 | Nov 14, 2019 |
| Matthews Construction Company Incorporated | 10 | $2,958 | Jun 5, 2019 |
| Mayflower Textile Services, Co. | 37 | $10,675 | Aug 17, 2022 |
| Mayor & City Council of Baltimore City | 12 | $1,225 | Sep 10, 2026 |
| Mayor and City Council of Balitmore | 8 | $0 | Jul 9, 2019 |
| Mayor and City Council of Baltimore | 429 | $4,950 | Sep 22, 2026 |
| Mayor and City Council, City of Baltimore | 3 | $0 | Dec 18, 2015 |
| Mayor and City Council/City of Baltimore Department of Public Works | 6 | $0 | Jun 9, 2026 |
| Mayor and City Counsil of Baltimore | 4 | $0 | Jul 2, 2019 |
| MB Masonry & Concrete LLC | 10 | $1,200 | Jan 13, 2026 |
| McCreesh Slate Roofing, LLC | 10 | $3,000 | Oct 16, 2026 |
| McCrossin Foundations, LLC. | 2 | $1,575 | Sep 16, 2019 |
| McElroy Metal Mill, Inc. | 3 | $2,100 | Sep 8, 2025 |
| McGraw Brothers LLC | 3 | $900 | May 13, 2024 |
| McLean Contracting Company | 170 | $42,631 | May 8, 2019 |
| MD Tree Experts Co. | 8 | $78,350 | Jul 27, 2023 |
| Mejia & Mejia Brothers LLC | 6 | $486 | Nov 15, 2024 |
| Mercedes-Benz USA, LLC | 5 | $6,899 | Mar 22, 2020 |
| Mercury Plastics MD Inc | 2 | $1,668 | Apr 8, 2021 |
| Merlin Yojana Padilla | 6 | $4,400 | Mar 13, 2026 |
| Merritt Construction Services, LLC | 1 | $675 | Aug 22, 2017 |
| Metalcraft, Inc. | 23 | $1,050 | Mar 22, 2021 |
| Metra Industries, Incorporated | 24 | $17,340 | Oct 23, 2024 |
| Metropolitan Fire Protection, Inc | 19 | $8,125 | Nov 17, 2016 |
| Michael J. Bollinger, Co., Inc. | 17 | $2,130 | Jun 25, 2018 |
| Mid-Atlantic Air Inc. | 6 | $337 | Feb 11, 2015 |
| Mid-Atlantic Baking Company, LLC | 27 | $26,575 | Apr 28, 2026 |
| Miller, Long & Arnold Co., Inc. | 67 | $35,083 | May 1, 2024 |
| Miracle Home Improvements, LLC | 8 | $19,821 | Aug 18, 2026 |
| Mission Drywall and Ceiling, LLC | 5 | $1,749 | Feb 24, 2017 |
| Mitchell Contracting, Inc. | 11 | $8,300 | Jul 18, 2023 |
| MLF, Inc. | 3 | $2,600 | Jul 1, 2025 |
| Modular One Office Installers, Inc. | 4 | $1,000 | Dec 3, 2019 |
| Moises a Mancia Marquez | 3 | $1,200 | Mar 16, 2023 |
| Mojo Art & Image, LLC | 2 | $551 | Oct 24, 2024 |
| Molloy Contracting Co Inc | 1 | $373 | Jun 9, 2018 |
| Montebello Brands, Inc. | 76 | $12,061 | Nov 24, 2025 |
| Monument Street Auto Center | 10 | $2,340 | Apr 2, 2026 |
| Monumental Paving & Excavating, Inc. | 10 | $8,825 | Jun 11, 2024 |
| Moon Wireless | 4 | $1,400 | Sep 9, 2025 |
| Morales Construction LLC | 4 | $1,800 | Jun 2, 2022 |
| Morales Roofing LLC | 2 | $1,000 | Jul 16, 2019 |
| Morgan State University | 108 | $0 | Aug 13, 2019 |
| MQ General Contractors, LLC | 17 | $9,000 | Jan 20, 2026 |
| Mra Systems, LLC | 1 | $0 | Nov 19, 2024 |
| MSM Roofing LLC | 3 | $650 | Jan 22, 2020 |
| Mta Metro Rail Division | 24 | $0 | Jan 13, 2025 |
| MTC Logistics, Inc. | 1 | $1,800 | Jun 29, 2020 |
| MTD Erectors, Incorporated | 40 | $27,924 | Sep 27, 2017 |
| Multiple Construction Services LLC | 5 | $1,012 | May 19, 2017 |
| MW Industries, Inc. | 2 | $4,988 | Jan 19, 2022 |
| N.K.H. Construction, LLC | 4 | $375 | May 23, 2017 |
| Nac Framing Inc. | 1 | $525 | Feb 12, 2026 |
| Nancy B. Wiener, D.D.S., P.A. | 2 | $0 | Apr 8, 2021 |
| National Instrument Leasing | 1 | $3,150 | Dec 8, 2025 |
| National Railroad Passenger Corp. | 23 | $6,740 | Dec 23, 2024 |
| Native Sons, Ltd | 5 | $700 | Apr 8, 2019 |
| NB General Contractor LLC | 10 | $3,300 | Jun 27, 2019 |
| NCD Virginia, LLC | 5 | $0 | Feb 2, 2023 |
| Nelson D Tree and Outdoor Services | 10 | $1,148 | Oct 31, 2023 |
| Nelson Manolo Gomez Gomez | 27 | $13,962 | Sep 17, 2024 |
| Nelson Precast Products, LLC | 17 | $11,200 | Jun 26, 2017 |
| Nery Payes | 1 | $1,050 | Jun 9, 2018 |
| Neutron Holdings, Inc. | 7 | $540 | Dec 11, 2018 |
| New Century Construction, Inc. | 22 | $7,998 | May 23, 2017 |
| New England Motor Freight, Inc. | 14 | $9,780 | Jul 1, 2015 |
| New NGC, Inc. | 11 | $5,400 | Nov 30, 2020 |
| New World Construction, Inc. | 16 | $15,487 | Jun 8, 2017 |
| Nicolas Tree Expert LLC | 7 | $1,200 | May 18, 2023 |
| Nikel LLC | 3 | $0 | Apr 9, 2021 |
| Nisell Plumbing & Heating | 1 | $450 | Oct 9, 2015 |
| NLP Construction, Inc | 3 | $1,350 | Jun 27, 2023 |
| Noble Senior Living at Baltimore, LLC | 10 | $2,700 | Aug 25, 2021 |
| Nockcorp LLC. | 1 | $525 | Jul 11, 2018 |
| Noe Segura | 3 | $1,200 | Jul 1, 2024 |
| Nolasco Construction Inc. | 3 | $1,437 | Jul 22, 2019 |
| North Hill Tree Experts | 3 | $772 | Jul 10, 2025 |
| Northeast Foods, Inc. | 14 | $5,885 | Mar 6, 2026 |
| Northeast Seamless Gutters, Inc. | 5 | $925 | May 1, 2019 |
| Northern Bay Environmental Systems, Inc. | 4 | $3,187 | Jul 15, 2016 |
| Northwest Capital Builders, Inc. | 5 | $2,400 | Feb 26, 2015 |
| Novatec, Inc. | 63 | $20,300 | Sep 3, 2025 |
| O. T. Neighoff & Sons, Inc. | 27 | $3,045 | Oct 4, 2021 |
| Oak Contracting LLC | 85 | $17,096 | Mar 19, 2026 |
| Oak Lawn Cemetery of Baltimore County | 8 | $0 | Jul 30, 2026 |
| Oden Contracting Solutions LLC | 12 | $2,200 | Sep 3, 2025 |
| Ogr Contractors, LLC | 5 | $2,250 | Jan 24, 2023 |
| Ojhonson Construction | 6 | $4,500 | Nov 17, 2025 |
| Old Town Hotel Group LLC | 2 | $700 | Feb 27, 2025 |
| Omayra Martinez | 4 | $2,100 | May 11, 2023 |
| One Roof, LLC | 10 | $3,538 | Jul 2, 2026 |
| Opt, LLC | 2 | $1,375 | Jun 21, 2024 |
| Ortiz Construction, L.L.C. | 5 | $374 | Jun 11, 2015 |
| Oscar Renda Contracting, Inc. | 3 | $2,250 | Oct 24, 2025 |
| Otis Elevator Company | 43 | $6,690 | Jul 9, 2026 |
| P & D Contractors, LLC | 1 | $1,107 | Apr 21, 2020 |
| P & J Contracting Company, Inc. | 100 | $36,220 | Oct 14, 2022 |
| P and R, Roofing and Siding | 5 | $2,550 | Apr 23, 2024 |
| Pak Foods 7 LLC | 6 | $2,200 | Jun 1, 2022 |
| Paolo Arroyo | 19 | $4,200 | Jul 6, 2018 |
| Park Heights Roofing | 8 | $1,512 | Apr 9, 2025 |
| Pastora Construction LLC | 12 | $3,800 | Mar 10, 2026 |
| Patisserie Poupon, Inc. | 22 | $4,140 | Apr 3, 2018 |
| Paul Morales | 5 | $2,800 | Nov 12, 2025 |
| Paz Construction LLC | 13 | $2,268 | Apr 12, 2022 |
| Paz G Construction LLC | 9 | $1,687 | Dec 10, 2024 |
| PE Property Management Group LLC | 7 | $1,800 | May 13, 2024 |
| Perez General Construction, LLC | 11 | $6,111 | Nov 8, 2021 |
| Perma-Patch, LLC | 26 | $9,770 | Nov 1, 2024 |
| Pfefferkorn's Coffee, Inc. | 23 | $1,635 | Mar 26, 2019 |
| PG Builders, Inc. | 3 | $437 | Apr 10, 2018 |
| Phifer Construction Company, Inc. | 3 | $1,437 | Dec 14, 2018 |
| Phil Dibello Family Roofing, Inc. | 11 | $6,415 | Apr 9, 2026 |
| Pioneer Contracting Co., Inc. | 82 | $39,679 | Apr 29, 2015 |
| Pipeway Energy Construction, Inc. | 1 | $187 | May 19, 2016 |
| PJ Foods LLC | 4 | $900 | Oct 7, 2024 |
| Plano-Coudon, LLC | 12 | $1,052 | Oct 1, 2025 |
| PM&T, Incorporated | 18 | $1,300 | Dec 12, 2024 |
| Pompeian, Inc. | 28 | $4,510 | Sep 5, 2023 |
| Portable Restroom Solutions, LLC | 9 | $1,370 | Jun 2, 2023 |
| Ports America Chesapeake, LLC | 8 | $41,435 | Nov 18, 2022 |
| Ports Maintenance, Inc. | 1 | $1,663 | Apr 18, 2018 |
| Precision Concrete Construction Co., Inc. | 68 | $14,484 | Mar 20, 2026 |
| Premier Builders Contractor, LLC | 10 | $500 | Jul 20, 2023 |
| Premier Concrete, Inc | 13 | $1,962 | Nov 28, 2017 |
| Premier Group | 3 | $11,172 | Jun 4, 2026 |
| Premium Construction LLC | 7 | $1,280 | Apr 24, 2019 |
| Prime Plumbing, LLC | 16 | $2,693 | Apr 4, 2025 |
| Prime Remodeling LLC | 10 | $3,150 | Sep 12, 2024 |
| Primeflight Aviation Services, Inc | 1 | $0 | Nov 30, 2022 |
| Priority Construction Corporation | 9 | $4,647 | May 13, 2022 |
| Pro Builder Contracting, LLC | 2 | $540 | Jan 22, 2020 |
| Pro Tech Contractors | 8 | $1,680 | Mar 10, 2025 |
| Project Plase, Inc. | 3 | $675 | Oct 17, 2025 |