- Machine Shop & Tool Repair Service, Splendora
- Machinery, Supplies & Equipment - Business Production Related, Splendora
- Machinery, Supplies & Equipment - Construction & Contractor Related, Splendora
- Management Consultants & Services, Splendora
- Manicurists & Pedicurists, Splendora
- Manufactured & Mobile Home Movers & Transporting, Splendora
- Manufacturing, Splendora
- Manufacturing Products, Splendora
- Marriage & Family Counselors, Splendora
- Medical Supplies & Equipment, Splendora
- Metal Repair Service & Blacksmith, Splendora - Iron Works
- Methodist Church, Splendora
- Mexican Restaurants, Splendora
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- Mini & Self Storage, Splendora
- Miscellaneous Household Item Repair, Splendora
- Miscellaneous Government, Splendora
- Miscellaneous Personal Services, Splendora
- Miscellaneous Photographers, Splendora
- Miscellaneous Professional, Splendora
- Modular & Mobile Homes For Sale, Splendora - Manufactured Homes Sale & Service
- Motor Vehicle, Splendora
- Motor Vehicle Rental & Leasing, Splendora
- Moving Companies, Splendora
- Moving Truck Rental , Splendora
- Musical Instruments Repair, Sales & Service, Splendora
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