| $350,000–1 million | O & M INC | KNOXVILLE, TN | Pinnacle Bank |
| $150,000–350,000 | O&C BAR B CUE, LLC | MCALLEN, TX | Pinnacle Bank |
| $350,000–1 million | O'DONNELL, FICENEC, WILLS & FERDIG L.L.P. | OMAHA, NE | Pinnacle Bank |
| $350,000–1 million | O'HARA PLUMBING COMPANY, INC. | GRAND ISLAND, NE | Pinnacle Bank |
| $350,000–1 million | O'NEIL HAGAMAN LLC | Nashville, TN | Pinnacle Bank |
| $350,000–1 million | O'NEIL HAGAMAN, LLC | NASHVILLE, TN | Pinnacle Bank |
| $350,000–1 million | O-FLEX GROUP, INC. | MURFREESBORO, TN | Pinnacle Bank |
| $150,000–350,000 | OAI DEALERSHIP LP | Fort Worth, TX | Pinnacle Bank |
| $150,000–350,000 | OAI DEALERSHIP, LP | ROSENBERG, TX | Pinnacle Bank |
| $2–5 million | OAK HALL INDUSTRIES, L.P. | SALEM, VA | Pinnacle Bank |
| $350,000–1 million | OAK NASHVILLE MANAGEMENT LLC | Charleston, SC | Pinnacle Bank |
| $350,000–1 million | OAK NASHVILLE MANAGEMENT LLC | CHARLESTON, SC | Pinnacle Bank |
| $350,000–1 million | OAK RIDGE TOOL-ENGINEERING | OAK RIDGE, TN | Pinnacle Bank |
| $150,000–350,000 | OAK VILLAGE ACADEMY AT GREEN LEVEL LLC | Cary, NC | Pinnacle Bank |
| $150,000–350,000 | OAK VILLAGE ACADEMY AT GREEN LEVEL, LLC | CARY, NC | Pinnacle Bank |
| $350,000–1 million | OAKTREE HEALTH AND REHABILITATION CENTER, LLC | MEMPHIS, TN | Pinnacle Bank |
| $350,000–1 million | OASIS CARWASH SYSTEMS INC | Galena, KS | Pinnacle Bank |
| $350,000–1 million | OBJECTIVEGI, INC. | FRANKLIN, TN | Pinnacle Bank |
| $150,000–350,000 | OBRIST & COMPANY INC | Columbus, NE | Pinnacle Bank |
| $150,000–350,000 | OBRIST & COMPANY INC | COLUMBUS, NE | Pinnacle Bank |
| $150,000–350,000 | OBVIOUSLEE MARKETING, LLC | CHARLESTON, SC | Pinnacle Bank |
| $150,000–350,000 | OCEAN CLUB ON SMUGGLER'S BEACH CONDOMINIUM TRUST | S YARMOUTH, MA | Pinnacle Bank |
| $150,000–350,000 | OCEAN CLUB ON SMUGGLER'S BEACH CONDOMINIUM TRUST | S Yarmouth, MA | Pinnacle Bank |
| $150,000–350,000 | OCEANO RISTORANTI | Monterey, CA | Pinnacle Bank |
| $350,000–1 million | OCTANE5 INTERNATIONAL, LLC | ALPHARETTA, GA | Pinnacle Bank |
| $150,000–350,000 | ODEUM CUISINE, LLC | Morgan Hill, CA | Pinnacle Bank |
| $150,000–350,000 | ODEUM CUISINE, LLC | MORGAN HILL, CA | Pinnacle Bank |
| $150,000–350,000 | OEB LAW PLLC | KNOXVILLE, TN | Pinnacle Bank |
| $1–2 million | OFC DEVELOPMENT CORPORATION | PLATTSMOUTH, NE | Pinnacle Bank |
| $350,000–1 million | OFF ROAD EQUIPMENT PARTS, INC. | ALCOA, TN | Pinnacle Bank |
| $350,000–1 million | OFF THE DOCK SEAFOOD, LLC | MEMPHIS, TN | Pinnacle Bank |
| $150,000–350,000 | OFFICE INTERIORS & DESIGN, INC. | LINCOLN, NE | Pinnacle Bank |
| $1–2 million | OGAN HOSPITALITY LLC | Raleigh, NC | Pinnacle Bank |
| $1–2 million | OGAN HOSPITALITY, LLC | RALEIGH, NC | Pinnacle Bank |
| $150,000–350,000 | OLAH HEALTHCARE TECHNOLOGY LLC | Columbus, OH | Pinnacle Bank |
| $150,000–350,000 | OLAH HEALTHCARE TECHNOLOGY, LLC | COLUMBUS, OH | Pinnacle Bank |
| $150,000–350,000 | OLD HICKORY BAT CO., INC | GOODLETTSVILLE, TN | Pinnacle Bank |
| $150,000–350,000 | OLD HICKORY COUNCIL OF BOY SCOUTS OF AMERICA INC. | Winston Salem, NC | Pinnacle Bank |
| $150,000–350,000 | OLD HICKORY COUNCIL OF BOY SCOUTS OF AMERICA, INC. | WINSTON SALEM, NC | Pinnacle Bank |
| $150,000–350,000 | OLD HICKORY TOOL & DIE, LP | WHITE HOUSE, TN | Pinnacle Bank |
| $350,000–1 million | OLD NORTH STATE MASONRY, LLC | MATTHEWS, NC | Pinnacle Bank |
| $150,000–350,000 | OLD TOWN BURLESON | Burleson, TX | Pinnacle Bank |
| $150,000–350,000 | OLD TOWN BURLESON RESTAURANT AND BREWERY | BURLESON, TX | Pinnacle Bank |
| $150,000–350,000 | OLDACRE MCDONALD LLC | Nashville, TN | Pinnacle Bank |
| $350,000–1 million | OLDACRE MCDONALD, LLC | NASHVILLE, TN | Pinnacle Bank |
| $150,000–350,000 | OLDE SYCAMORE GOLF PLANTATION, INC. | CHARLOTTE, NC | Pinnacle Bank |
| $350,000–1 million | OLE BEN FRANKLIN MOTORS | OAK RIDGE, TN | Pinnacle Bank |
| $350,000–1 million | OLE DQ, INC. | SAN ANGELO, TX | Pinnacle Bank |
| $150,000–350,000 | OLIVE - THE BEAUTY LOUNGE, INC. | MANSFIELD, TX | Pinnacle Bank |
| $150,000–350,000 | OLIVE - THE BEAUTY LOUNGE, INC. | Mansfield, TX | Pinnacle Bank |
| $150,000–350,000 | OLYMPIA LUXURY COACHES, LLC | LA VERGNE, TN | Pinnacle Bank |
| $350,000–1 million | OMAHA EYE & LASER INSTITUTE | Omaha, NE | Pinnacle Bank |
| $350,000–1 million | OMAHA EYE & LASER INSTITUTE INC | OMAHA, NE | Pinnacle Bank |
| $350,000–1 million | OMAHA NEON SIGN COMPANY, INC. | OMAHA, NE | Pinnacle Bank |
| $150,000–350,000 | OMAHA ORTHODONTICS, LLC | OMAHA, NE | Pinnacle Bank |
| $350,000–1 million | OMEGA CONSULTANTS, INC. | OAK RIDGE, TN | Pinnacle Bank |
| $350,000–1 million | ONE12 DOWNTOWN, LLC | Johnson City, TN | Pinnacle Bank |
| $150,000–350,000 | ONE12 DOWNTOWN, LLC | JOHNSON CITY, TN | Pinnacle Bank |
| $350,000–1 million | ONEELMINGTON, LLC | NASHVILLE, TN | Pinnacle Bank |
| $150,000–350,000 | ONEILL FAMILY PHARMACY INC | ONEILL, NE | Pinnacle Bank |
| $150,000–350,000 | OPAL DINING GROUP, LLC THE | MT. PLEASANT, SC | Pinnacle Bank |
| $150,000–350,000 | OPANS, LLC | DURHAM, NC | Pinnacle Bank |
| $150,000–350,000 | OPE OF AMERICA, INC. | LEXINGTON, NC | Pinnacle Bank |
| $150,000–350,000 | OPEN DOOR MINISTRIES OF HIGH POINT, INC. | HIGH POINT, NC | Pinnacle Bank |
| $150,000–350,000 | OPENING DRIVE, LLC | Nashville, TN | Pinnacle Bank |
| $2–5 million | OPTICAL CABLE CORPORATION | ROANOKE, VA | Pinnacle Bank |
| $150,000–350,000 | OPTOMETRY GROUP PLLC | Memphis, TN | Pinnacle Bank |
| $150,000–350,000 | OPTOMETRY GROUP, PLLC | MEMPHIS, TN | Pinnacle Bank |
| $150,000–350,000 | ORACLE AVIATION, LLC | OMAHA, NE | Pinnacle Bank |
| $150,000–350,000 | ORANGE COUNTY RAPE CRISIS CENTER | CHAPEL HILL, NC | Pinnacle Bank |
| $150,000–350,000 | ORANGE COUNTY RAPE CRISIS CENTER | Chapel Hill, NC | Pinnacle Bank |
| $1–2 million | ORCHARD FOODS LP | Sevierville, TN | Pinnacle Bank |
| $1–2 million | ORCHARD FOODS LP | SEVIERVILLE, TN | Pinnacle Bank |
| $150,000–350,000 | ORDERINSITE LLC | NASHVILLE, TN | Pinnacle Bank |
| $350,000–1 million | ORIGINAL FOOTWEAR LLC | UTUADO, PR | Pinnacle Bank |
| $350,000–1 million | ORIGINAL FOOTWEAR LLC | ARECIBO, PR | Pinnacle Bank |
| $1–2 million | ORIGINAL FOOTWEAR MANUFACTURING BR LLC | Big Rapids, MI | Pinnacle Bank |
| $2–5 million | ORIGINAL FOOTWEAR MANUFACTURING BR, LLC | BIG RAPIDS, MI | Pinnacle Bank |
| $350,000–1 million | ORTALE KELLEY | NASHVILLE, TN | Pinnacle Bank |
| $350,000–1 million | ORTHOONE SPORTS MEDICINE & ORTHOPAEDICS, PLLC | COLLIERVILLE, TN | Pinnacle Bank |
| $350,000–1 million | ORTHOPAEDIC SPECIALIST OF NORTH CAROLINA | RALEIGH, NC | Pinnacle Bank |
| $150,000–350,000 | OSAKA JAPANESE CUISINE LLC | Collierville, TN | Pinnacle Bank |
| $150,000–350,000 | OSCEOLA IMPLEMENT & SUPPLY INC | OSCEOLA, NE | Pinnacle Bank |
| $150,000–350,000 | OSCEOLA IMPLEMENT AND SUPPLY | Osceola, NE | Pinnacle Bank |
| $350,000–1 million | OSTERIA, INC. | Palo Alto, CA | Pinnacle Bank |
| $150,000–350,000 | OSTERIA, INC. | Palo Alto, CA | Pinnacle Bank |
| $150,000–350,000 | OTAKU SOUTH LLC | Nashville, TN | Pinnacle Bank |
| $150,000–350,000 | OTAKU SOUTH LLC | NASHVILLE, TN | Pinnacle Bank |
| $150,000–350,000 | OTEKA TECHNOLOGIES LLC | Memphis, TN | Pinnacle Bank |
| $150,000–350,000 | OTEKA TECHNOLOGIES, LLC | MEMPHIS, TN | Pinnacle Bank |
| $350,000–1 million | OTOLARYNGOLOGY ASSOCIATES OF TENNESSEE, P.C. | NASHVILLE, TN | Pinnacle Bank |
| $150,000–350,000 | OTS ENTERPRISES, LLC | Brentwood, TN | Pinnacle Bank |
| $150,000–350,000 | OTS ENTERPRISES, LLC | BRENTWOOD, TN | Pinnacle Bank |
| $350,000–1 million | OUTBACK PRESENTS LLC | TN, TN | Pinnacle Bank |
| $350,000–1 million | OUTBACK PRESENTS LLC | Nashville, TN | Pinnacle Bank |
| $150,000–350,000 | OUTDOOR LIGHTING PERSPECTIVES, LLC | NASHVILLE, TN | Pinnacle Bank |
| $350,000–1 million | OVATION INC. | Nashville, TN | Pinnacle Bank |
| $350,000–1 million | OVATION, INC. | NASHVILLE, TN | Pinnacle Bank |
| $350,000–1 million | OVERDRIVE REBUILDS, INC. | CONCORD, NC | Pinnacle Bank |
| $150,000–350,000 | OVERLAND HILLS BAPTIST CHURCH | PAPILLION, NE | Pinnacle Bank |