| $350,000–1 million | MOY TARIN RAMIREZ ENGINEERS, LLC | SAN ANTONIO, TX | Frost Bank |
| $2–5 million | MPII, INC | SAN ANTONIO, TX | Truist Bank |
| $5–10 million | MPOWER HOLDINGS LLC | SAN ANTONIO, TX | First Source Federal Credit Union |
| $150,000–350,000 | MPS CONSTRUCTION & DESIGN, LLC | SAN ANTONIO, TX | JPMorgan Chase Bank, National Association |
| $150,000–350,000 | MS2, INC. | SAN ANTONIO, TX | Frost Bank |
| $1–2 million | MSB COMMUNICATIONS LLC | SAN ANTONIO, TX | Texas Partners Bank |
| $2–5 million | MTC INC. | SAN ANTONIO, TX | Frost Bank |
| $2–5 million | MTC, INC | SAN ANTONIO, TX | Frost Bank |
| $150,000–350,000 | MTT ENTERPRISES, INC | SAN ANTONIO, TX | Celtic Bank Corporation |
| $1–2 million | MUELLER & WILSON, INC. | SAN ANTONIO, TX | Texas Partners Bank |
| $150,000–350,000 | MULDER PLUMBING SERVICES, LLC. | SAN ANTONIO, TX | Frost Bank |
| $350,000–1 million | MULE RESTAURANT GROUP LLC | SAN ANTONIO, TX | American Bank National Association |
| $150,000–350,000 | MULTI ELECTRIC CO | SAN ANTONIO, TX | First Source Federal Credit Union |
| $1–2 million | MULTISOURCE SAND & GRAVEL CO LTD | SAN ANTONIO, TX | Frost Bank |
| $350,000–1 million | MUNICIPAL GOLF ASSOCIATION - SAN ANTONIO | SAN ANTONIO, TX | Texas Partners Bank |
| $150,000–350,000 | MURGA INVESTMENTS, INC. | SAN ANTONIO, TX | Umpqua Bank |
| $150,000–350,000 | MURRAY & SON ENTERPRISES LLC | SAN ANTONIO, TX | Bank of America, National Association |
| $150,000–350,000 | MURRAY PLUMBING CO, LLC | SAN ANTONIO, TX | Texas Partners Bank |
| $150,000–350,000 | MUSICAL ARTS CENTER OF SAN ANTONIO, INC. | SAN ANTONIO, TX | JPMorgan Chase Bank, National Association |
| $150,000–350,000 | MUSSLEWHITE INSURANCE AGENCY, LLC | SAN ANTONIO, TX | Broadway National Bank |
| $5–10 million | MUY BRANDS, LLC | SAN ANTONIO, TX | City National Bank |
| $1–2 million | MUY CONSULTING CORPORATION | SAN ANTONIO, TX | The Huntington National Bank |
| $5–10 million | MUY HAMBURGER PARTNERS, LLC | SAN ANTONIO, TX | The Huntington National Bank |
| $2–5 million | MUY PIZZA MINNESOTA, LLC | SAN ANTONIO, TX | Plains Commerce Bank |
| $5–10 million | MUY PIZZA TEJAS, LLC | SAN ANTONIO, TX | Regions Bank |
| $350,000–1 million | MV ACOSTA LTD | SAN ANTONIO, TX | Jefferson Bank |
| $150,000–350,000 | MY & A INC | SAN ANTONIO, TX | JPMorgan Chase Bank, National Association |
| $150,000–350,000 | MYK INVESTMENTS | SAN ANTONIO, TX | Frost Bank |
| $150,000–350,000 | MYWORKPLACE, INC. | SAN ANTONIO, TX | JPMorgan Chase Bank, National Association |
| $150,000–350,000 | N H SHANNON, MD PA | SAN ANTONIO, TX | First Source Federal Credit Union |
| $150,000–350,000 | N&N STRUCTURES INC | SAN ANTONIO, TX | Broadway National Bank |
| $150,000–350,000 | NADER G. ISKANDER, M.D., P.A. | SAN ANTONIO, TX | First Source Federal Credit Union |
| $2–5 million | NAPCO PRECAST, LLC | SAN ANTONIO, TX | Frost Bank |
| $150,000–350,000 | NARCISO GONZALEZ MD PLLC | SAN ANTONIO, TX | Broadway National Bank |
| $150,000–350,000 | NATIONAL MEDICAL HOMECARE, INC. | SAN ANTONIO, TX | Texas Partners Bank |
| $1–2 million | NATIONAL NURSING & REHAB SA PEDIATRICS, INC. | SAN ANTONIO, TX | Texas Partners Bank |
| $350,000–1 million | NATIONAL SKEET SHOOTING ASSOCIATION | SAN ANTONIO, TX | Frost Bank |
| $150,000–350,000 | NATIONAL TRAUMA INSTITUTE | SAN ANTONIO, TX | Regions Bank |
| $150,000–350,000 | NATIONAL UNITY INSURANCE COMPANY | SAN ANTONIO, TX | International Bank of Commerce |
| $350,000–1 million | NATIONAL WESTERN ART FOUNDATION | SAN ANTONIO, TX | Texas Capital Bank |
| $2–5 million | NATIONS CABINETRY, LLC | SAN ANTONIO, TX | Frost Bank |
| $2–5 million | NATIVE ENERGY & TECHNOLOGY INC | SAN ANTONIO, TX | Bank of America, National Association |
| $350,000–1 million | NATURAL BRIDGE CAVERNS, INC. | SAN ANTONIO, TX | Frost Bank |
| $350,000–1 million | NATURAL BRIDGE WILDLIFE RANCH, INC. | SAN ANTONIO, TX | First United Bank and Trust Company |
| $150,000–350,000 | NATWEL SUPPLY CORPORATION | SAN ANTONIO, TX | Vantage Bank Texas |
| $150,000–350,000 | NAVALES ENTERPRISES, INC. | SAN ANTONIO, TX | Jefferson Bank |
| $150,000–350,000 | NAVARRO RESTAURANT PARTNERS, LLC | SAN ANTONIO, TX | Texas Partners Bank |
| $350,000–1 million | NEAL, INC | SAN ANTONIO, TX | Jefferson Bank |
| $2–5 million | NEC NETWORKS, LLC | SAN ANTONIO, TX | First Source Federal Credit Union |
| $150,000–350,000 | NERIUM BIOTECHNOLOGY, INC. | SAN ANTONIO, TX | Texas Capital Bank |
| $150,000–350,000 | NETWORKNEWSWIRE (NNW) LLC | SAN ANTONIO, TX | JPMorgan Chase Bank, National Association |
| $150,000–350,000 | NEU LIMBS LLC | SAN ANTONIO, TX | Security State Bank & Trust |
| $350,000–1 million | NEUROSURGICAL ASSOCIATES OF SAN ANTONIO, PA | SAN ANTONIO, TX | Zions Bank, A Division of |
| $150,000–350,000 | NEW CHOICES TREATMENT CENTERS LLC | SAN ANTONIO, TX | Texas Capital Bank |
| $350,000–1 million | NEW EXPERIMENTAL THERAPEUTICS OF SAN ANTONIO, LLC | SAN ANTONIO, TX | Frost Bank |
| $150,000–350,000 | NEW HEIGHTS DENTAL AND BRACES, PA | SAN ANTONIO, TX | Frost Bank |
| $150,000–350,000 | NEW VISION ENDOSCOPY INC | SAN ANTONIO, TX | Bank of America, National Association |
| $350,000–1 million | NEW WORLD CAR IMPORTS - SAN ANTONIO, INC. | SAN ANTONIO, TX | Broadway National Bank |
| $1–2 million | NEW WORLD CAR NISSAN, INC. | SAN ANTONIO, TX | Broadway National Bank |
| $150,000–350,000 | NEWELL LTD | SAN ANTONIO, TX | East West Bank |
| $150,000–350,000 | NEWLEAF HOMES, LLC | SAN ANTONIO, TX | International Bank of Commerce |
| $150,000–350,000 | NEWSOME ENTERPRISES INC | SAN ANTONIO, TX | Broadway National Bank |
| $2–5 million | NEWTON ASSOCIATES I, LTD | SAN ANTONIO, TX | Frost Bank |
| $150,000–350,000 | NEXXT DISTRIBUTING | SAN ANTONIO, TX | Stellar Bank |
| $150,000–350,000 | NFM CONSULTING LLC | SAN ANTONIO, TX | First Source Federal Credit Union |
| $150,000–350,000 | NICHAS COCINA LLC | SAN ANTONIO, TX | Frost Bank |
| $150,000–350,000 | NICK S. AGUILAR, M.D., P.A. | SAN ANTONIO, TX | Frost Bank |
| $150,000–350,000 | NIDO LTD. | SAN ANTONIO, TX | Frost Bank |
| $150,000–350,000 | NIGHT & DAY PEDIATRICS PA | SAN ANTONIO, TX | JPMorgan Chase Bank, National Association |
| $150,000–350,000 | NIZNIK ENTERPRISES, INC | SAN ANTONIO, TX | Frost Bank |
| $150,000–350,000 | NM FINE DINING LLC | SAN ANTONIO, TX | Enterprise Bank & Trust |
| $150,000–350,000 | NOAH TECHNOLOGIES CORP. OF TEXAS | SAN ANTONIO, TX | Broadway National Bank |
| $150,000–350,000 | NOLANS OFFICE PRODUCTS INC | SAN ANTONIO, TX | Frost Bank |
| $350,000–1 million | NORDIC IMPORTS II, LTD. | SAN ANTONIO, TX | Texas Partners Bank |
| $350,000–1 million | NORDIC IMPORTS III, LTD | SAN ANTONIO, TX | International Bank of Commerce |
| $350,000–1 million | NORTH PARK I-10 WEST, INC. | SAN ANTONIO, TX | Jefferson Bank |
| $350,000–1 million | NORTH PARK SD MOTORS, LLC | SAN ANTONIO, TX | Jefferson Bank |
| $350,000–1 million | NORTH PARK SSP MOTORS, LLC | SAN ANTONIO, TX | Frost Bank |
| $150,000–350,000 | NORTH SAN ANTONIO HEALTHCARE ASSOCIATES | SAN ANTONIO, TX | Broadway National Bank |
| $150,000–350,000 | NORTHEAST ORTHOPAEDICS & SPORTS MEDICINE, LLP | SAN ANTONIO, TX | PlainsCapital Bank |
| $150,000–350,000 | NORTHERN HILLS UNITED METHODIST CHURCH | SAN ANTONIO, TX | Jefferson Bank |
| $150,000–350,000 | NORTHROCK CHURCH INC. | SAN ANTONIO, TX | American Bank National Association |
| $1–2 million | NPMI MANAGEMENT INC. | SAN ANTONIO, TX | Frost Bank |
| $150,000–350,000 | NUEVA VIDA BEHAVIORAL HEALTH ASSOCIATES INC | SAN ANTONIO, TX | Bank of America, National Association |
| $350,000–1 million | NUEVO GARCIA FOODS LLC | SAN ANTONIO, TX | TransPecos Banks, SSB. |
| $150,000–350,000 | NUGGET INTERNATIONAL, INC. | SAN ANTONIO, TX | Texas Partners Bank |
| $150,000–350,000 | NUTRITION ENTERPRISES, INC. | SAN ANTONIO, TX | Broadway National Bank |
| $150,000–350,000 | O'HAVER PLUMBING, LTD. | SAN ANTONIO, TX | Broadway National Bank |
| $350,000–1 million | OAK HAVEN MASSAGE & BODYWORK, INC | SAN ANTONIO, TX | Frost Bank |
| $150,000–350,000 | OAK HAVEN MASSAGE BULVERDE LLC | SAN ANTONIO, TX | Frost Bank |
| $1–2 million | OAK HILLS CHURCH, INC | SAN ANTONIO, TX | Zions Bank, A Division of |
| $150,000–350,000 | OAK PARK CLEANERS LLP | SAN ANTONIO, TX | Broadway National Bank |
| $350,000–1 million | OAKDELL PHARMACY INC | SAN ANTONIO, TX | Frost Bank |
| $350,000–1 million | OBERROC, L.L.C. | SAN ANTONIO, TX | Frost Bank |
| $350,000–1 million | OBLATE SCHOOL OF THEOLOGY | SAN ANTONIO, TX | Bank of Belleville |
| $150,000–350,000 | OFFICESOURCE LTD | SAN ANTONIO, TX | TransPecos Banks, SSB. |
| $150,000–350,000 | OHANA PEDIATRIC HOME HEALTH LLC | SAN ANTONIO, TX | First Source Federal Credit Union |
| $350,000–1 million | OILFIELD EQUIPMENT MARKETING INC | SAN ANTONIO, TX | JPMorgan Chase Bank, National Association |
| $150,000–350,000 | OKRENT FLOORCOVERING CORP. | SAN ANTONIO, TX | Frost Bank |
| $150,000–350,000 | OLD ENGLANDS LION & ROSE RIM, LLC | SAN ANTONIO, TX | Texas Partners Bank |