| $2–5 million | NORTH TEXAS VILLAGE HEALTH PARTNERS, PA | PLANO, TX | Frost Bank |
| $350,000–1 million | NORTHEAST CHILDREN'S DENTISTRY, INC. | San Antonio, TX | Frost Bank |
| $350,000–1 million | NORTHEAST CHILDRENS DENTISTRY INC. | San Antonio, TX | Frost Bank |
| $350,000–1 million | NORTHEAST OBGYN ASSOCIATES | SCHERTZ, TX | Frost Bank |
| $350,000–1 million | NORTHEAST TARRANT INTERNAL MEDICINE ASSOCIATES L.L.P. | EULESS, TX | Frost Bank |
| $150,000–350,000 | NORTHSHORE TITLE, INC. | PORTLAND, TX | Frost Bank |
| $150,000–350,000 | NORTHSTAR CONSTRUCTION, LLC | HALTOM CITY, TX | Frost Bank |
| $150,000–350,000 | NORTHWEST EMS CONSULTANTS PA | CYPRESS, TX | Frost Bank |
| $150,000–350,000 | NORTHWEST EMS CONSULTANTS PA | Cypress, TX | Frost Bank |
| $350,000–1 million | NOUVEAU TECHNOLOGY SERVICES LP | CARROLLTON, TX | Frost Bank |
| $350,000–1 million | NOUVEAU TECHNOLOGY SERVICES LP | Carrollton, TX | Frost Bank |
| $1–2 million | NPMI MANAGEMENT INC. | SAN ANTONIO, TX | Frost Bank |
| $1–2 million | NUECES ELECTRIC COOPERATIVE, INC | CORPUS CHRISTI, TX | Frost Bank |
| $1–2 million | NYOS CHARTER SCHOOL, INCORPORATED | AUSTIN, TX | Frost Bank |
| $350,000–1 million | O'DONNELL'S LANDSCAPE SERVICES | SOUTHLAKE, TX | Frost Bank |
| $350,000–1 million | O'DONNELL'S LANDSCAPE SERVICES | Southlake, TX | Frost Bank |
| $150,000–350,000 | O'NEAL COMMERCIAL PAINTING, LLC | COPPELL, TX | Frost Bank |
| $1–2 million | O.W. LEE CO. INC. | Comfort, TX | Frost Bank |
| $150,000–350,000 | OAK CLIFF OFFICE SUPPLY & PRINTING, INC. | DALLAS, TX | Frost Bank |
| $350,000–1 million | OAK HAVEN MASSAGE & BODYWORK, INC | SAN ANTONIO, TX | Frost Bank |
| $350,000–1 million | OAK HAVEN MASSAGE & BODYWORK, INC | San Antonio, TX | Frost Bank |
| $350,000–1 million | OAK HAVEN MASSAGE AUSTIN LLC | AUSTIN, TX | Frost Bank |
| $350,000–1 million | OAK HAVEN MASSAGE AUSTIN LLC | Austin, TX | Frost Bank |
| $150,000–350,000 | OAK HAVEN MASSAGE BULVERDE LLC | SAN ANTONIO, TX | Frost Bank |
| $150,000–350,000 | OAK UNDERGROUND LLC | SOUTHLAKE, TX | Frost Bank |
| $150,000–350,000 | OAK UNDERGROUND LLC | Southlake, TX | Frost Bank |
| $350,000–1 million | OAKDALE PRIVATE SCHOOL, LLC | HOUSTON, TX | Frost Bank |
| $350,000–1 million | OAKDELL PHARMACY INC | SAN ANTONIO, TX | Frost Bank |
| $1–2 million | OATES INDUSTRIES INC. | La Porte, TX | Frost Bank |
| $1–2 million | OATES INDUSTRIES, INC. | LA PORTE, TX | Frost Bank |
| $350,000–1 million | OBERROC, L.L.C. | SAN ANTONIO, TX | Frost Bank |
| $150,000–350,000 | OBSIDIAN CHEMICAL SOLUTIONS | MIDLAND, TX | Frost Bank |
| $150,000–350,000 | ODESSA ADVANCED EYE CARE P.A. | Odessa, TX | Frost Bank |
| $150,000–350,000 | ODESSA ADVANCED EYE CARE, PA | ODESSA, TX | Frost Bank |
| $350,000–1 million | ODESSA PHYSICAL THERAPY PC | Odessa, TX | Frost Bank |
| $350,000–1 million | ODESSA PHYSICAL THERAPY, PC | ODESSA, TX | Frost Bank |
| $350,000–1 million | ODESSA SEPARATOR INC. | Odessa, TX | Frost Bank |
| $350,000–1 million | ODESSA SEPARATOR, INC. | ODESSA, TX | Frost Bank |
| $350,000–1 million | ODYSSEY ENGINEERING GROUP LLC | Houston, TX | Frost Bank |
| $350,000–1 million | ODYSSEY ENGINEERING GROUP, LLC | HOUSTON, TX | Frost Bank |
| $2–5 million | ODYSSEY SPACE RESEARCH LLC | HOUSTON, TX | Frost Bank |
| $350,000–1 million | OFFENHAUSER CO | HOUSTON, TX | Frost Bank |
| $350,000–1 million | OFFENHAUSER COMPANY | Houston, TX | Frost Bank |
| $1–2 million | OFI TESTING EQUIPMENT INC | HOUSTON, TX | Frost Bank |
| $350,000–1 million | OIL PATCH FUEL & SUPPLY, INC. | HARLINGEN, TX | Frost Bank |
| $150,000–350,000 | OILDOM PUBLISHING COMPANY OF TEXAS INC. | HOUSTON, TX | Frost Bank |
| $150,000–350,000 | OILDOM PUBLISHING COMPANY OF TEXAS, INC. | HOUSTON, TX | Frost Bank |
| $150,000–350,000 | OILFIELD DIRTWORX & CONSTRUCTION LLC | ODESSA, TX | Frost Bank |
| $150,000–350,000 | OILFIELD DIRTWORX & CONSTRUCTION LLC | Odessa, TX | Frost Bank |
| $150,000–350,000 | OKRENT FLOORCOVERING CORP. | SAN ANTONIO, TX | Frost Bank |
| $150,000–350,000 | OKRENT FLOORCOVERING CORP. | San Antonio, TX | Frost Bank |
| $350,000–1 million | OLIVE JUICE LLC | San Antonio, TX | Frost Bank |
| $150,000–350,000 | OLIVE JUICE, LLC | SAN ANTONIO, TX | Frost Bank |
| $350,000–1 million | OLIVER EQUIPMENT COMPANY | HOUSTON, TX | Frost Bank |
| $150,000–350,000 | OLIVER TRUCK CENTER LLC | Converse, TX | Frost Bank |
| $150,000–350,000 | OLIVER TRUCK CENTER LLC | CONVERSE, TX | Frost Bank |
| $150,000–350,000 | OLSONSMITH SOLUTIONS LLC | Pearland, TX | Frost Bank |
| $150,000–350,000 | OLSONSMITH SOLUTIONS, LLC | Pearland, TX | Frost Bank |
| $1–2 million | OMEGA ASSET GROUP INC. | San Antonio, TX | Frost Bank |
| $150,000–350,000 | OMEGA BROADCAST & CINEMA LP | Austin, TX | Frost Bank |
| $150,000–350,000 | OMEGA RESEARCH INC | FORT WORTH, TX | Frost Bank |
| $150,000–350,000 | OMNI FIRE AND SECURITY SYSTEM LP | HOUSTON, TX | Frost Bank |
| $150,000–350,000 | OMNI SURFACES CORP. | HOUSTON, TX | Frost Bank |
| $2–5 million | OMNI-CHAMPIONSGATE RESORT HOTEL LP | Houston, TX | Frost Bank |
| $150,000–350,000 | ONDEMAND HOME SERVICES | San Antonio, TX | Frost Bank |
| $350,000–1 million | ONE CALL LOGISTICS, LLC | Odessa, TX | Frost Bank |
| $350,000–1 million | ONLINE DIRECTIONAL BORING MANAGEMENT INC | HOUSTON, TX | Frost Bank |
| $150,000–350,000 | OPERATING SYSTEMS INC | HOUSTON, TX | Frost Bank |
| $150,000–350,000 | OPERATING SYSTEMS INC | Houston, TX | Frost Bank |
| $350,000–1 million | OPERATIONAL TECHNOLOGIES, ETAL | SAN ANTONIO, TX | Frost Bank |
| $2–5 million | OPERATIONS PATHWAY SYSTEMS, L.P. | FORT WORTH, TX | Frost Bank |
| $350,000–1 million | OPHTHALMOLOGY ASSOCIATES OF SAN ANTONIO | SAN ANTONIO, TX | Frost Bank |
| $350,000–1 million | OPHTHALMOLOGY ASSOCIATES OF SAN ANTONIO | San Antonio, TX | Frost Bank |
| $350,000–1 million | OPIELA MECHANICAL INC | SAN ANTONIO, TX | Frost Bank |
| $150,000–350,000 | OPTECH ENTERPRISE SOLUTIONS LP | San Antonio, TX | Frost Bank |
| $350,000–1 million | OPTECH ENTERPRISE SOLUTIONS, LP | SAN ANTONIO, TX | Frost Bank |
| $350,000–1 million | OPTECH GENTE INC | SAN ANTONIO, TX | Frost Bank |
| $150,000–350,000 | OPTIMA LAND SERVICES LLC | Midland, TX | Frost Bank |
| $150,000–350,000 | OPTIMUM WIRELESS LLC | BOERNE, TX | Frost Bank |
| $150,000–350,000 | ORBIT DRIVER SERVICES | HOUSTON, TX | Frost Bank |
| $350,000–1 million | ORIENT BIORESOURCE CENTER, INC. | Alice, TX | Frost Bank |
| $150,000–350,000 | ORIENTAL RUG GALLERY, L.P. | SAN ANTONIO, TX | Frost Bank |
| $150,000–350,000 | ORION COMMUNICATIONS INC | DALLAS, TX | Frost Bank |
| $350,000–1 million | ORION HEALTH SERVICES, INC. | CORPUS CHRISTI, TX | Frost Bank |
| $150,000–350,000 | ORIS TECHNOLOGIES INC. | New Braunfels, TX | Frost Bank |
| $150,000–350,000 | ORIS TECHNOLOGIES, INC. | NEW BRAUNFELS, TX | Frost Bank |
| $150,000–350,000 | ORRCO INERNATIONAL, INC. | JOSHUA, TX | Frost Bank |
| $1–2 million | ORTHOPEDIC ASSOCIATES OF CORPUS CHRISTI | CORPUS CHRISTI, TX | Frost Bank |
| $150,000–350,000 | ORTHOPEDIC PERFORMANCE INSTITUTE PLLC | SAN ANTONIO, TX | Frost Bank |
| $150,000–350,000 | ORTHOWORLD LLC | DALLAS, TX | Frost Bank |
| $150,000–350,000 | ORTHOWORLD LLC | Dallas, TX | Frost Bank |
| $150,000–350,000 | ORTHRUS, INC. | PEARLAND, TX | Frost Bank |
| $350,000–1 million | OSBORNE, HELMAN, KNEBEL & SCOTT, LLP | AUSTIN, TX | Frost Bank |
| $150,000–350,000 | OSCAR GARZA MD PA | PEARSALL, TX | Frost Bank |
| $1–2 million | OSHA LIANG | HOUSTON, TX | Frost Bank |
| $350,000–1 million | OSO DEVELOPMENT PARTNERS, LLC | HOUSTON, TX | Frost Bank |
| $350,000–1 million | OSS AUTO LLC | McAllen, TX | Frost Bank |
| $150,000–350,000 | OUR LADY OF GUADALUPE | HELOTES, TX | Frost Bank |
| $150,000–350,000 | OUR LADY OF PERPETUAL HELP ACADEMY | CORPUS CHRISTI, TX | Frost Bank |
| $150,000–350,000 | OUR PLACE RESTAURANT LLC | Mansfield, TX | Frost Bank |