| $350,000–1 million | MBCO ENGINEERING LLC | HOUSTON, TX | Frost Bank |
| $350,000–1 million | MBCO ENGINEERING LLC | Houston, TX | Frost Bank |
| $150,000–350,000 | MBW SERV CORPORATION | DALLAS, TX | Frost Bank |
| $150,000–350,000 | MC MANAGEMENT & DEVELOPMENT, INC. | BELLAIRE, TX | Frost Bank |
| $350,000–1 million | MCCLURE OIL COMPANY INC. | Midland, TX | Frost Bank |
| $350,000–1 million | MCCLURE OIL COMPANY INC. | MIDLAND, TX | Frost Bank |
| $1–2 million | MCCON BUILDING AND PETROLEUM SERVICES, INC | FLOWER MOUND, TX | Frost Bank |
| $150,000–350,000 | MCCOWN ENTERPRISES LLC | Marion, TX | Frost Bank |
| $150,000–350,000 | MCCOWN ENTERPRISES, LLC | MARION, TX | Frost Bank |
| $350,000–1 million | MCCREERY AVIATION CO. INC. | McAllen, TX | Frost Bank |
| $350,000–1 million | MCCREERY AVIATION CO., INC. | MCALLEN, TX | Frost Bank |
| $350,000–1 million | MCCULLOUGH HALL NURSING HOME, INC | San Antonio, TX | Frost Bank |
| $350,000–1 million | MCDONALD WORLEY PC | Houston, TX | Frost Bank |
| $350,000–1 million | MCDUFF ENTERPRISE LLC | SAN ANTONIO, TX | Frost Bank |
| $150,000–350,000 | MCELROY, SULLIVAN, MILLER & WEBER, LLP | AUSTIN, TX | Frost Bank |
| $350,000–1 million | MCEWEN & ASSOCIATES INC | IRVING, TX | Frost Bank |
| $350,000–1 million | MCFADDEN & MILLER LTD | Dallas, TX | Frost Bank |
| $350,000–1 million | MCFADDEN & MILLER, LTD | DALLAS, TX | Frost Bank |
| $150,000–350,000 | MCFALL, BREITBALL, & EIDMAN PC | HOUSTON, TX | Frost Bank |
| $350,000–1 million | MCGARRAH JESSEE MEDIA LP | AUSTIN, TX | Frost Bank |
| $2–5 million | MCGARRAH JESSEE, LP | AUSTIN, TX | Frost Bank |
| $150,000–350,000 | MCGOVERN ALLERGY CLINIC A PROFESSIONAL ASSOCIATION | Bellaire, TX | Frost Bank |
| $150,000–350,000 | MCGOVERN ALLERGY CLINIC, A PROFESSIONAL ASSOCIATION | BELLAIRE, TX | Frost Bank |
| $350,000–1 million | MCGRAY & MCGRAY LAND SURVEYORS, INC. | AUSTIN, TX | Frost Bank |
| $350,000–1 million | MCGUIRE, CRADDOCK & STROTHER, P.C. | DALLAS, TX | Frost Bank |
| $350,000–1 million | MCINTOSH & ASSOCIATES LLC | Dallas, TX | Frost Bank |
| $350,000–1 million | MCINTOSH & ASSOCIATES, LLC | LEWISVILLE, TX | Frost Bank |
| $150,000–350,000 | MCJAM INC | SAN ANTONIO, TX | Frost Bank |
| $150,000–350,000 | MCKEE BURKE & ASSOCIATES LLC | HOUSTON, TX | Frost Bank |
| $150,000–350,000 | MCKENNA HEALTH MANAGEMENT | New Braunfels, TX | Frost Bank |
| $150,000–350,000 | MCKENNA HEALTH MANAGEMENT | NEW BRAUNFELS, TX | Frost Bank |
| $150,000–350,000 | MCM ENERGY PARTNERS LLC | MIDLAND, TX | Frost Bank |
| $150,000–350,000 | MCM ENERGY PARTNERS LLC | Midland, TX | Frost Bank |
| $150,000–350,000 | MCM PLASTICS INC | Houston, TX | Frost Bank |
| $1–2 million | MCMC AUTO LTD | BURLESON, TX | Frost Bank |
| $350,000–1 million | MCNAY ART MUSEUM | SAN ANTONIO, TX | Frost Bank |
| $350,000–1 million | MCNAY ART MUSEUM | San Antonio, TX | Frost Bank |
| $350,000–1 million | MDM SCAFFOLDING SERVICES INC | HURST, TX | Frost Bank |
| $150,000–350,000 | MDS LAND SURVEYING | KERRVILLE, TX | Frost Bank |
| $150,000–350,000 | MEADOW OAKS ACADEMY | MESQUITE, TX | Frost Bank |
| $150,000–350,000 | MEADOW OAKS ACADEMY INC | Mesquite, TX | Frost Bank |
| $350,000–1 million | MEADOW OAKS EDUCATION FOUNDATION INC | MESQUITE, TX | Frost Bank |
| $150,000–350,000 | MEADS CONSULTING AND CONTRACTING | SAN ANTONIO, TX | Frost Bank |
| $150,000–350,000 | MECCANOTECNICA USA INC. | PHARR, TX | Frost Bank |
| $150,000–350,000 | MECCANOTECNICA USA INC. | Pharr, TX | Frost Bank |
| $1–2 million | MED SECURITY INC. | San Antonio, TX | Frost Bank |
| $1–2 million | MED SECURITY, INC. | SAN ANTONIO, TX | Frost Bank |
| $150,000–350,000 | MEDIA MOOLAH, LLC | San Antonio, TX | Frost Bank |
| $150,000–350,000 | MEDICAL CENTER ANESTHESIA ASSOCIATES PA | Houston, TX | Frost Bank |
| $150,000–350,000 | MEDICAL CENTER ANESTHESIA ASSOCIATES, PA | HOUSTON, TX | Frost Bank |
| $1–2 million | MEDICAL CENTER OPHTHALMOLOGY ASSOCIATES | SAN ANTONIO, TX | Frost Bank |
| $150,000–350,000 | MEDICAL WHOLESALE, INC. | SAN ANTONIO, TX | Frost Bank |
| $1–2 million | MEDICO MD MANAGEMENT LLC | IRVING, TX | Frost Bank |
| $350,000–1 million | MEDICO MD MANAGEMENT LLC | Irving, TX | Frost Bank |
| $350,000–1 million | MEDIGY LLC | Fort Worth, TX | Frost Bank |
| $350,000–1 million | MEDIGY, LLC | FORT WORTH, TX | Frost Bank |
| $150,000–350,000 | MEDISYS REHABILITATION INC. | Cedar Park, TX | Frost Bank |
| $350,000–1 million | MEEKS + PARTNERS CO. | HOUSTON, TX | Frost Bank |
| $150,000–350,000 | MEG HEALTHCARE, INC | DALLAS, TX | Frost Bank |
| $150,000–350,000 | MEGA SYSTEMS INC | Helotes, TX | Frost Bank |
| $150,000–350,000 | MEGA SYSTEMS, INC. | HELOTES, TX | Frost Bank |
| $150,000–350,000 | MEMBERSY LLC | AUSTIN, TX | Frost Bank |
| $1–2 million | MEMORIAL DRIVE PRESBYTERIAN CHURCH | HOUSTON, TX | Frost Bank |
| $150,000–350,000 | MENDEZ ENGINEERING PLLC | San Antonio, TX | Frost Bank |
| $150,000–350,000 | MENDEZ ENGINEERING, PLLC | SAN ANTONIO, TX | Frost Bank |
| $150,000–350,000 | MENDIETA FAMILY FOODS INC | Pearland, TX | Frost Bank |
| $150,000–350,000 | MENDIETA FAMILY FOODS INC | PEARLAND, TX | Frost Bank |
| $350,000–1 million | MENS T CLINIC, LLC | FRISCO, TX | Frost Bank |
| $150,000–350,000 | MENTAL HEALTH RESOURCE OF TEXAS | AUSTIN, TX | Frost Bank |
| $150,000–350,000 | MENTAL HEALTH RESOURCE OF TEXAS | Austin, TX | Frost Bank |
| $350,000–1 million | MEP ENGINEERING, INC. | SAN ANTONIO, TX | Frost Bank |
| $150,000–350,000 | MERCED HOUSING TEXAS | San Antonio, TX | Frost Bank |
| $150,000–350,000 | MERCED HOUSING TEXAS | SAN ANTONIO, TX | Frost Bank |
| $150,000–350,000 | MERCHANT MULTISERVICE LLC | SAN ANTONIO, TX | Frost Bank |
| $1–2 million | MERCHCO SERVICES INC. | San Antonio, TX | Frost Bank |
| $1–2 million | MERCHCO SERVICES INC. | SAN ANTONIO, TX | Frost Bank |
| $150,000–350,000 | MERCURY CHOP HOUSE ARLINGTON | ARLINGTON, TX | Frost Bank |
| $150,000–350,000 | MERCURY CHOP HOUSE ARLINGTON LLC | Arlington, TX | Frost Bank |
| $150,000–350,000 | MEREDITH O'DONNELL INC | HOUSTON, TX | Frost Bank |
| $150,000–350,000 | MEREDITH ODONNELL INC. | Houston, TX | Frost Bank |
| $150,000–350,000 | MEREKEN LAND & PRODUCTION CO. | FORT WORTH, TX | Frost Bank |
| $150,000–350,000 | MERIDIAN HEALTH CARE SERVICES LLC | SAN ANTONIO, TX | Frost Bank |
| $150,000–350,000 | MERIDIAN HEALTH CARE SERVICES LLC | San Antonio, TX | Frost Bank |
| $350,000–1 million | MERIT COFFEE LLC | SAN ANTONIO, TX | Frost Bank |
| $150,000–350,000 | MERITAX LLC | DALLAS, TX | Frost Bank |
| $150,000–350,000 | MERLIN 21 AUTOMOTIVE | SAN ANTONIO, TX | Frost Bank |
| $150,000–350,000 | MERRITT PLUMBING, LLC | BOERNE, TX | Frost Bank |
| $1–2 million | MESA WELL SERVICING LP | Hobbs, NM | Frost Bank |
| $1–2 million | MESA WELL SERVICING LP | HOBBS, NM | Frost Bank |
| $350,000–1 million | MESSER, FORT AND MCDONALD, PLLC | FRISCO, TX | Frost Bank |
| $350,000–1 million | MESSINA TOURING GROUP, LLC | AUSTIN, TX | Frost Bank |
| $350,000–1 million | METALINK, LLC | AUSTIN, TX | Frost Bank |
| $150,000–350,000 | METALLOY INC | HOUSTON, TX | Frost Bank |
| $150,000–350,000 | METALLOY INC | Houston, TX | Frost Bank |
| $350,000–1 million | METCALFE WOLFF STUART & WILLIAMS, LLP | AUSTIN, TX | Frost Bank |
| $350,000–1 million | METERING & TESTING SERVICE INC. | Odessa, TX | Frost Bank |
| $350,000–1 million | METERING & TESTING SERVICE, INC. | ODESSA, TX | Frost Bank |
| $350,000–1 million | METRO BRICK AND STONE COMPANY | DALLAS, TX | Frost Bank |
| $150,000–350,000 | METRO CODE ANALYSIS, L.L.C. | FORT WORTH, TX | Frost Bank |
| $1–2 million | METRO ELECTRIC, INC. | MCALLEN, TX | Frost Bank |