| MFC Construction LLC | RGC | 2023 | Active |
| MG Landscape & Construction Inc | RGC | 2022 | Active |
| MG Pro Roofing LLC | RGC | 2025 | Active |
| Mga Construction LLC | RGC | 2016 | Renew by Dec 22, 2026 |
| MHM Construction LLC | RGC | 2023 | Active |
| Michael Sanders Construction LLC | RGC | 2026 | Active |
| Mid Valley Commercial Construction Inc | CGC2, RGC | 2015 | Active |
| Mid Valley Fence & Construction LLC | CGC2, RGC | 2018 | Active |
| Mid Valley Metal Works Inc | CGC2 | 2014 | Active |
| Mid Willamette Valley Community Action Agency Inc | RGC | 2010 | Active |
| Migar Corporation | RGC | 1991 | Active |
| Mighty B & R General Construction LLC | RGC | 2025 | Active |
| Mij Construction LLC | RGC | 2026 | Active |
| Mikes Powerwashing LLC | RGC | 2014 | Active |
| Millstone Industries LLC | CGC1 | 2025 | Active |
| Minecraft Construction LLC | RGC | 2024 | Active |
| Mira Contracting LLC | RGC | 2026 | Active |
| Mitajata LLC | RGC | 2021 | Active |
| MJ Bowman LLC | RGC | 2021 | Active |
| MJ Tallan Construction Inc | RGC | 1992 | Active |
| MJ West Construction Inc | CGC2, RGC | 1993 | Active |
| MJC Roofing LLC | RGC | 2013 | Active |
| MKS Construction Inc | RGC | 2017 | Active |
| ML Houck Construction Co | CGC1 | 1992 | Active |
| MLC Construction LLC | CGC2 | 2023 | Active |
| MM Drywall LLC | RGC | 2023 | Active |
| Mobile Home Men LLC | RGC | 2025 | Active |
| Modern Ace Construction LLC | RGC | 2024 | Active |
| Modern Craftsman Custom Homes LLC | RGC | 2021 | Active |
| Modern View Construction LLC | RGC | 2024 | Active |
| Modern Vista Construction LLC | RGC | 2026 | Active |
| Modestos Construction LLC | CGC2, RGC | 2020 | Active |
| Modi Construction LLC | RGC | 2023 | Active |
| Monarca Tree Service LLC | RGC | 2025 | Active |
| Monarch Architectural Construction LLC | RGC | 2023 | Active |
| Monarch Window Coverings Inc | RGC | 2021 | Active |
| Monders Inc | RGC | 1984 | Active |
| Monkey Roofing Inc | RGC | 2022 | Active |
| Montagne Development Inc | CGC2, RGC | 1997 | Active |
| Montes Construction Inc | CGC2, RGC | 2008 | Active |
| Montgomery Asset Group Inc | RGC | 2025 | Active |
| Montgomery Construction Group Corporation | CGC2, RGC | 2017 | Active |
| Morrison Projects LLC | RGC | 2024 | Active |
| Morrow Meadows Corporation | CGC1 | 1993 | Active |
| Mosaic Construction Services LLC | CGC1, RGC | 2023 | Active |
| Moser Development Corp | CGC2, RGC | 1987 | Active |
| Mountain Coast Electric LLC | CGC1, RGC | 2020 | Renew by Dec 22, 2026 |
| Mountain View Exteriors LLC | RGC | 2023 | Active |
| Mountain View Tree Service LLC | RGC | 2007 | Active |
| Mountain West Community Construction LLC | CGC2, RGC | 2009 | Active |
| Mountaintop Elite Construction LLC | RGC | 2022 | Renew by Dec 27, 2026 |
| Moxie Construction LLC | RGC | 2023 | Active |
| Moxie Interiors LLC | RGC | 2025 | Active |
| Moxie Mechanical LLC | RGC | 2026 | Active |
| Mr Handyman LLC | RGC | 2018 | Active |
| MRB Enterprises Inc | CGC2, RGC | 1997 | Active |
| MS General Construction LLC | RGC | 2025 | Active |
| MSL Construction LLC | RGC | 2018 | Active |
| MTZ Painting LLC | CGC2, RGC | 2020 | Renew by Nov 17, 2026 |
| Mud Legacy Drywall LLC | RGC | 2019 | Active |
| Mulch & Mangle Land Management LLC | RGC | 2025 | Active |
| Multi Construction Inc | CGC2, RGC | 2003 | Active |
| Munguia Construction LLC | RGC | 2022 | Active |
| MV Construction & Design LLC | RGC | 2021 | Active |
| MVF Construction LLC | RGC | 2023 | Active |
| MW Design Workshop Inc | CGC2, RGC | 1994 | Active |
| My Contractor LLC | RGC | 2018 | Active |
| N & J Concrete LLC | RGC | 2018 | Active |
| N & R Concrete & Construction LLC | RGC | 2021 | Active |
| N K Excavating LLC | RGC | 2020 | Active |
| Nachos Roofing LLC | RGC | 2019 | Active |
| Nanak Construction Inc | RGC | 2020 | Active |
| Narra Home Consulting LLC | RGC | 2022 | Active |
| Nash Builders LLC | RGC | 2017 | Active |
| Natural Precision Painting LLC | RGC | 2023 | Active |
| Natures Edge Landscaping Construction LLC | RGC | 2024 | Active |
| Navarro Group Construction LLC | RGC | 2023 | Active |
| Navas Insulation LLC | RGC | 2024 | Renew by Dec 20, 2026 |
| Nayar Construction LLC | RGC | 2015 | Active |
| Neighborly Construction LLC | CGC1, RGC | 2020 | Active |
| Nekia Design Build LLC | CGC2 | 2024 | Active |
| Nemecek Construction Inc | RGC | 2010 | Active |
| New Beginnings Construction Inc | RGC | 1996 | Active |
| New Generation Construction LLC | RGC | 2021 | Active |
| New Haven Construction LLC | RGC | 2025 | Active |
| New Paradise Construction Inc | CGC2, RGC | 2016 | Active |
| New Season Outdoor Living LLC | RGC | 2022 | Active |
| New Ventures Inc | CGC2, RGC | 1980 | Active |
| Newcom Construction LLC | RGC | 2025 | Active |
| Newman Paving And Curbing Inc | CGC2 | 2003 | Active |
| Nexgen Builders Of Oregon LLC | CGC1, RGC | 2026 | Active |
| Next Level Painting & Restoration LLC | RGC | 2022 | Active |
| NG Construction LLC | RGC | 2025 | Active |
| Nicholas Cascisa Construction LLC | RGC | 2022 | Active |
| Nicholas McCain Construction LLC | RGC | 2024 | Active |
| Nissi Construction LLC | RGC | 2013 | Active |
| Nita LLC | RGC | 2019 | Active |
| NJ Craftsman LLC | RGC | 2026 | Active |
| Noble Construction & Handyman Services LLC | RGC | 2024 | Active |
| Noble Craft Remodeling LLC | RGC | 2026 | Active |