| $150,000–350,000 | R.J. WHITTAKER & SONS INC | OKLAHOMA CITY, OK | BancFirst |
| $1–2 million | R.K. BLACK INC. | OKLAHOMA CITY, OK | BancFirst |
| $350,000–1 million | RADIOLOGY ASSOCIATES, LLC | OKLAHOMA CITY, OK | BOKF, National Association |
| $150,000–350,000 | RAM PRODUCTS, CHEMICALS & HIGH PRESSURE WASHERS, INC. | OKLAHOMA CITY, OK | InterBank |
| $150,000–350,000 | RANDALL S FUDGE PC | OKLAHOMA CITY, OK | First Fidelity Bank |
| $350,000–1 million | RANDALL UNIVERSITY | OKLAHOMA CITY, OK | First United Bank and Trust Company |
| $150,000–350,000 | RANGEL'S CONCRETE LLC | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | RASTER MASTERS LLC | OKLAHOMA CITY, OK | CrossFirst Bank |
| $150,000–350,000 | RAY ALBRIGHT STEEL PRODUCTS INC | OKLAHOMA CITY, OK | BOKF, National Association |
| $150,000–350,000 | RAZORBACK PARTNERS, INC. | OKLAHOMA CITY, OK | Kirkpatrick Bank |
| $150,000–350,000 | RB AKINS COMPANY | OKLAHOMA CITY, OK | Simmons Bank |
| $150,000–350,000 | RBRS LEGAL GROUP, | OKLAHOMA CITY, OK | Arvest Bank |
| $350,000–1 million | RDNJ, LLC | OKLAHOMA CITY, OK | RCB Bank |
| $350,000–1 million | RE-CON COMPANY | OKLAHOMA CITY, OK | BOKF, National Association |
| $350,000–1 million | RE-CON COMPANY, A TEXAS CORP | OKLAHOMA CITY, OK | BOKF, National Association |
| $150,000–350,000 | REAGAN RESOURCES, INC. | OKLAHOMA CITY, OK | First Fidelity Bank |
| $350,000–1 million | REAGAN SMITH, INC. | OKLAHOMA CITY, OK | State Bank of Toulon |
| $150,000–350,000 | RED BRICK DESIGNS LLC | OKLAHOMA CITY, OK | Simmons Bank |
| $350,000–1 million | RED IRON, LLC | OKLAHOMA CITY, OK | First United Bank and Trust Company |
| $150,000–350,000 | RED MOUNTAIN ENERGY, LLC | OKLAHOMA CITY, OK | International Bank of Commerce |
| $150,000–350,000 | RED PLAINS PLUMBING, INC. | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | RED PLAINS SURVEYING COMPANY | OKLAHOMA CITY, OK | RCB Bank |
| $150,000–350,000 | RED PRIME STEAKHOUSE, LP | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | RED ROCK DISTRIBUTING COMPANY | OKLAHOMA CITY, OK | NBC Oklahoma |
| $150,000–350,000 | RED ROCKS RESOURCES, LLC | OKLAHOMA CITY, OK | MidFirst Bank |
| $150,000–350,000 | REDBONE ELECTRICAL CONTRACTORS LLC | OKLAHOMA CITY, OK | First Fidelity Bank |
| $350,000–1 million | REDROCK CANYON GRILL, LLC | OKLAHOMA CITY, OK | BancFirst |
| $1–2 million | REEL POWER INDUSTRIAL INC. | OKLAHOMA CITY, OK | CIBC Bank USA |
| $1–2 million | REES ASSOCIATES, INC. | OKLAHOMA CITY, OK | First Source Federal Credit Union |
| $150,000–350,000 | REFLECTIONS AT OAKWOOD LLC | OKLAHOMA CITY, OK | Simmons Bank |
| $1–2 million | REGIONAL FOOD BANK OF OKLAHOMA, INC. | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | REMERGE OF OKLAHOMA COUNTY, INC | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | RENOVATION MANAGEMENT, INC. | OKLAHOMA CITY, OK | NBC Oklahoma |
| $350,000–1 million | RESONANCE, INC | OKLAHOMA CITY, OK | BancFirst |
| $350,000–1 million | RESOURCE OIL AND GAS, LLC | OKLAHOMA CITY, OK | CrossFirst Bank |
| $150,000–350,000 | RETINA CONSULTANTS OF OKLAHOMA PLLC | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | REVOKC, LLC | OKLAHOMA CITY, OK | Great Plains National Bank |
| $150,000–350,000 | REVOLUTION PIPELINE, LLC | OKLAHOMA CITY, OK | Great Plains National Bank |
| $1–2 million | REYNOLDS FORD OF OKC, INC | OKLAHOMA CITY, OK | Armstrong Bank |
| $350,000–1 million | RF-IP, INC. | OKLAHOMA CITY, OK | Arvest Bank |
| $1–2 million | RGCE LLC | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | RICHARD DOUGLAS COMPANY | OKLAHOMA CITY, OK | Legacy Bank |
| $150,000–350,000 | RICHARD R. BROWN ASSOCIATES, P.C. | OKLAHOMA CITY, OK | First Liberty Bank |
| $150,000–350,000 | RICHARDT DISTRIBUTORS INC | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | RICHWAY, LLC | OKLAHOMA CITY, OK | First United Bank and Trust Company |
| $150,000–350,000 | RIG CLEANING SERVICES, LLC | OKLAHOMA CITY, OK | Exchange Bank and Trust Company |
| $350,000–1 million | RIVER ROCK OPERATING COMPANY | OKLAHOMA CITY, OK | Cadence Bank |
| $350,000–1 million | RIVERBIKE OF OKLAHOMA, INC. | OKLAHOMA CITY, OK | Simmons Bank |
| $350,000–1 million | RLR VISION PLLC | OKLAHOMA CITY, OK | Arvest Bank |
| $150,000–350,000 | ROBERT B BRYAN II DDS PLLC | OKLAHOMA CITY, OK | Valliance Bank |
| $2–5 million | ROBINSON INNOVATIONS (OKLAHOMA), LLC | OKLAHOMA CITY, OK | Commerce Bank |
| $1–2 million | ROBINSON PARK LLC | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | ROBINSON, HOOVER & FUDGE, PLLC | OKLAHOMA CITY, OK | JPMorgan Chase Bank, National Association |
| $350,000–1 million | ROBYN HOLDINGS, LLC | OKLAHOMA CITY, OK | MidFirst Bank |
| $150,000–350,000 | ROCKWELL ENERGY RESOURCES, LLC | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | ROGER POTTS DENTAL GROUP, P.C. | OKLAHOMA CITY, OK | Customers Bank |
| $350,000–1 million | ROK MEDICAL MANAGEMENT LLC | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | ROLL SOONER INC | OKLAHOMA CITY, OK | Stride Bank, National Association |
| $150,000–350,000 | RON WALTERS HOMES, LLC | OKLAHOMA CITY, OK | Frontier State Bank |
| $150,000–350,000 | RONALD R HOPKINS D O PLLC | OKLAHOMA CITY, OK | JPMorgan Chase Bank, National Association |
| $350,000–1 million | ROSS ELECTRIC, INC. | OKLAHOMA CITY, OK | BancFirst |
| $350,000–1 million | ROSS TRANSPORTATION, INC. | OKLAHOMA CITY, OK | BOKF, National Association |
| $350,000–1 million | ROUNTREE III FOODS, INC. | OKLAHOMA CITY, OK | BancFirst |
| $350,000–1 million | RSM DEVELOPMENT, INC. | OKLAHOMA CITY, OK | Legacy Bank |
| $350,000–1 million | RT DEVELOPMENT LLC | OKLAHOMA CITY, OK | Arvest Bank |
| $150,000–350,000 | RT HOFFMAN | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | RUCKER MECHANICAL INC | OKLAHOMA CITY, OK | First Fidelity Bank |
| $150,000–350,000 | RUDNICKI PLLC | OKLAHOMA CITY, OK | JPMorgan Chase Bank, National Association |
| $150,000–350,000 | RUE BOURBON LLC | OKLAHOMA CITY, OK | UMB Bank, National Association |
| $350,000–1 million | RUFNEX OILFIELD SERVICES LLC | OKLAHOMA CITY, OK | Blue Sky Bank |
| $350,000–1 million | RX MEDICAL LLC | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | RYLYN ENTERPRISES INC. | OKLAHOMA CITY, OK | JPMorgan Chase Bank, National Association |
| $150,000–350,000 | S & W MANAGEMENT, L.L.C. | OKLAHOMA CITY, OK | Security Bank |
| $150,000–350,000 | S & W POWER SYSTEMS AND ENGINE SERVICE INC | OKLAHOMA CITY, OK | BancFirst |
| $350,000–1 million | S&B BURGERS, LLC | OKLAHOMA CITY, OK | SpiritBank |
| $150,000–350,000 | S.E. HARDESTY COMPANY | OKLAHOMA CITY, OK | Frontier State Bank |
| $150,000–350,000 | SACRED HEART CHURCH | OKLAHOMA CITY, OK | First Fidelity Bank |
| $150,000–350,000 | SADGURU LLC | OKLAHOMA CITY, OK | FNB Community Bank |
| $1–2 million | SAFETY AND SECURITY SERVICES, | OKLAHOMA CITY, OK | BOKF, National Association |
| $350,000–1 million | SAFETYSKILLS, LLC | OKLAHOMA CITY, OK | BOKF, National Association |
| $150,000–350,000 | SAGAC PUBLIC AFFARIS., LLC | OKLAHOMA CITY, OK | Kirkpatrick Bank |
| $1–2 million | SAGE PUMP SERVICES, LP | OKLAHOMA CITY, OK | Bank of Houston |
| $150,000–350,000 | SAINT ANN RETIREMENT CENTER | OKLAHOMA CITY, OK | MidFirst Bank |
| $150,000–350,000 | SALON W, LLC | OKLAHOMA CITY, OK | BancFirst |
| $2–5 million | SANTA FE SOUTH SCHOOLS, INC. | OKLAHOMA CITY, OK | International Bank of Commerce |
| $350,000–1 million | SAXUM STRATEGIC COMMUNICATIONS LLC | OKLAHOMA CITY, OK | First Fidelity Bank |
| $150,000–350,000 | SB CONSULTING, LLC | OKLAHOMA CITY, OK | American Exchange Bank, Lindsay, Oklahoma |
| $1–2 million | SCHRAAD & ASSOCIATES - SALES / MARKETING. INC. | OKLAHOMA CITY, OK | First Liberty Bank |
| $350,000–1 million | SCHWAB AND COMPANY | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | SCHWARZ ASPHALT, L.L.C. | OKLAHOMA CITY, OK | RCB Bank |
| $350,000–1 million | SCHWARZ PAVING COMPANY, INC | OKLAHOMA CITY, OK | RCB Bank |
| $350,000–1 million | SCIENCE MUSEUM OKLAHOMA INC | OKLAHOMA CITY, OK | Kirkpatrick Bank |
| $150,000–350,000 | SCISSORTAIL PARK FOUNDATION, INC | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | SCOPE CONCEPTS LLC | OKLAHOMA CITY, OK | Great Plains National Bank |
| $150,000–350,000 | SCOTT GROUP, LLC | OKLAHOMA CITY, OK | Kirkpatrick Bank |
| $150,000–350,000 | SCOTT HOEFERT | OKLAHOMA CITY, OK | Regent Bank |
| $150,000–350,000 | SECURITY OPTIONS, LLC | OKLAHOMA CITY, OK | First Fidelity Bank |
| $150,000–350,000 | SEED STATION LLC | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | SELECT COATINGS, INC | OKLAHOMA CITY, OK | The First National Bank and Trust Co, Chickasha, Oklahoma |
| $150,000–350,000 | SELECT OPERATIONS OF QUAIL SPRINGS LLC | OKLAHOMA CITY, OK | Simmons Bank |