| $150,000–350,000 | CORPORATE RESIDENTIAL SERVICES INC | TULSA, OK | AVB Bank |
| $150,000–350,000 | CORSAIR MEDICAL LLC | TULSA, OK | First Oklahoma Bank |
| $1–2 million | COUNSELING & RECOVERY SERVICES OF OKLAHOMA, INC | TULSA, OK | BancFirst |
| $1–2 million | COWEN CONSTRUCTION, INC | TULSA, OK | Blue Sky Bank |
| $350,000–1 million | COX RETIREMENT PROPERTIES, INC | TULSA, OK | First Oklahoma Bank |
| $150,000–350,000 | CRAFTSMEN RESOURCES LLC | TULSA, OK | BancFirst |
| $150,000–350,000 | CRAIG & KEITHLINE, INC | TULSA, OK | Regent Bank |
| $350,000–1 million | CRB COMPANIES, LLC | TULSA, OK | Mabrey Bank |
| $150,000–350,000 | CREDITPOINT SOFTWARE, LLC | TULSA, OK | BOKF, National Association |
| $350,000–1 million | CRIMSON STEEL SUPPLY LLC | TULSA, OK | BancFirst |
| $150,000–350,000 | CROSSOVER PREPARATORY ACADEMY LLC | TULSA, OK | First Oklahoma Bank |
| $150,000–350,000 | CROSSTOWN LEARNING CENTER, INC. | TULSA, OK | Patrons Bank National Association |
| $350,000–1 million | CROWN PRODUCTS INC | TULSA, OK | Mabrey Bank |
| $150,000–350,000 | CU SERVICE CENTERS, INC | TULSA, OK | Red Crown FCU |
| $150,000–350,000 | CULBREATH OIL & GAS CO INC | TULSA, OK | SpiritBank |
| $350,000–1 million | CURA-HPC, LLC | TULSA, OK | SpiritBank |
| $2–5 million | CYNTERGY AEC LLC | TULSA, OK | Regent Bank |
| $150,000–350,000 | D &E SUPPLY LLC | TULSA, OK | Security Bank |
| $2–5 million | D&L MANUFACTURING, INC. | TULSA, OK | Mabrey Bank |
| $150,000–350,000 | DAEMI GROUP OF OKLAHOMA, INC. | TULSA, OK | Security Bank |
| $150,000–350,000 | DANNY MYERS QUALITY PAINT & BODY | TULSA, OK | Mabrey Bank |
| $150,000–350,000 | DANNY'S U PULL LLC | TULSA, OK | First Bank of Owasso |
| $350,000–1 million | DARBY EQUIPMENT CO | TULSA, OK | Mabrey Bank |
| $350,000–1 million | DATA EXCHANGE INC | TULSA, OK | Grand Bank |
| $150,000–350,000 | DAVIDSON & DAVIDSON ENTERPRISES LLC | TULSA, OK | BancFirst |
| $150,000–350,000 | DAYSPRING VILLA WOMEN AND CHILDREN'S SHELTER | TULSA, OK | First Pryority Bank |
| $150,000–350,000 | DEAN WEST CONSTRUCTION, INC. | TULSA, OK | Security Bank |
| $150,000–350,000 | DENTAL DEPOT OF 10004 SOUTH MEMORIAL DRIVE PLLC | TULSA, OK | MidFirst Bank |
| $150,000–350,000 | DETROIT FINANCIAL SERVICES, INC. | TULSA, OK | Security Bank |
| $350,000–1 million | DIAMOND ENERGY SERVICES,LP | TULSA, OK | BOM Bank |
| $350,000–1 million | DIAMOND SECURITY & INVESTIGATIVE SERVICES LLC | TULSA, OK | American Heritage Bank |
| $350,000–1 million | DIECO MANUFACTURING INC | TULSA, OK | Equity Bank |
| $350,000–1 million | DIGI SECURITY SYSTEMS, LLC | TULSA, OK | Vast Bank, National Association |
| $350,000–1 million | DIGICUT LLC | TULSA, OK | First Oklahoma Bank |
| $350,000–1 million | DISTRIBUTECH LLC | TULSA, OK | BOKF, National Association |
| $150,000–350,000 | DIVCO, INC. | TULSA, OK | Mabrey Bank |
| $150,000–350,000 | DIVERSIFIED RUBBER PRODUCTS, INC. | TULSA, OK | BancFirst |
| $1–2 million | DMI INTERNATIONAL, INC. | TULSA, OK | Equity Bank |
| $1–2 million | DOERNER SAUNDERS DANIEL & ANDERSON, LLP | TULSA, OK | BOKF, National Association |
| $350,000–1 million | DOMESTIC VIOLENCE INTERVENTION SERVICES, INC. | TULSA, OK | BOKF, National Association |
| $350,000–1 million | DON THORNTON CADILLAC, INC | TULSA, OK | BancFirst |
| $350,000–1 million | DON THORNTON IMPORTS, LLC | TULSA, OK | BancFirst |
| $350,000–1 million | DONOHUE COMMERCIAL SERVICE, INC. | TULSA, OK | First National Bank of Oklahoma |
| $150,000–350,000 | DORSEY AND DORSEY, INC. | TULSA, OK | Bank 7 |
| $150,000–350,000 | DOWNING MANUFACTURING INC | TULSA, OK | First United Bank and Trust Company |
| $350,000–1 million | DOWNTOWN DESIGN SERVICES, INC | TULSA, OK | Arvest Bank |
| $150,000–350,000 | DP FINANCIAL & TAX INC | TULSA, OK | Grand Bank |
| $150,000–350,000 | DR. JEFF M. LONG ENTERPRISES, P.L.L.C. | TULSA, OK | Arvest Bank |
| $350,000–1 million | DRD TECHNOLOGY CORPORATION | TULSA, OK | CrossFirst Bank |
| $150,000–350,000 | DRILLERS F&B, LLC | TULSA, OK | SpiritBank |
| $1–2 million | DRUMMOND COMMUNICATIONS LLC | TULSA, OK | First Oklahoma Bank |
| $150,000–350,000 | DRUMMOND LAW PLLC | TULSA, OK | First Oklahoma Bank |
| $150,000–350,000 | DRVINES LLC | TULSA, OK | The City National Bank and Trust Company of Lawton, Oklahoma |
| $150,000–350,000 | DSK INVESTMENTS, LLC | TULSA, OK | The First National Bank and Trust Company of Broken Arrow |
| $350,000–1 million | DT SPECIALIZED SERVICES, INC. | TULSA, OK | The Central Trust Bank |
| $150,000–350,000 | DYER GLASS & MIRROR, INC. | TULSA, OK | Security Bank |
| $350,000–1 million | DYKON BLASTING CORP INC | TULSA, OK | Mabrey Bank |
| $350,000–1 million | E & I SALES CO. | TULSA, OK | The Central Trust Bank |
| $350,000–1 million | E-PUMPS INC | TULSA, OK | Arvest Bank |
| $350,000–1 million | E-PUMPS, INC | TULSA, OK | Arvest Bank |
| $150,000–350,000 | EAGLE CUSTOM CABINETS, LLC | TULSA, OK | Oklahoma Capital Bank |
| $350,000–1 million | EAGLE OAK LLC | TULSA, OK | First Oklahoma Bank |
| $2–5 million | EAGLE REDI-MIX CONCRETE LLC | TULSA, OK | First Pryority Bank |
| $150,000–350,000 | EAGLE RESOURCES GROUP, LLC | TULSA, OK | BOKF, National Association |
| $150,000–350,000 | EAGLE ROAD OIL LLC | TULSA, OK | TD Bank, National Association |
| $350,000–1 million | EASTERN OKLAHOMA EAR, NOSE AND THROAT | TULSA, OK | Vast Bank, National Association |
| $350,000–1 million | EBSCO SPRING CO INC | TULSA, OK | BancFirst |
| $150,000–350,000 | ECONOMASTERS, LLC | TULSA, OK | Security Bank |
| $150,000–350,000 | EDA+FKI ENGINEERS PC | TULSA, OK | Blue Sky Bank |
| $350,000–1 million | EDUCATIONAL CONCEPTS, LLC | TULSA, OK | MapleMark Bank |
| $150,000–350,000 | EFFECTIVE TEACHING LEARNING INSTITUTE INC | TULSA, OK | Equity Bank |
| $150,000–350,000 | EL PATRON FOODS LLC | TULSA, OK | Arvest Bank |
| $150,000–350,000 | ELECTRONIC STORAGE CORPORATION | TULSA, OK | RCB Bank |
| $150,000–350,000 | ELGIN ENTERTAINMENT, INC. | TULSA, OK | Vast Bank, National Association |
| $150,000–350,000 | ELITE I & E, LLC | TULSA, OK | JPMorgan Chase Bank, National Association |
| $150,000–350,000 | ELITE TITLE LLC | TULSA, OK | First Oklahoma Bank |
| $150,000–350,000 | ELKHORN ENERGY, LLC | TULSA, OK | Arvest Bank |
| $150,000–350,000 | ELLER AND DETRICH, A PROFESSIONAL CORPORATION | TULSA, OK | Mabrey Bank |
| $150,000–350,000 | ELLIOTT PRECISION PRODUCTS INCORPORATED | TULSA, OK | Grand Bank |
| $1–2 million | ELLSWORTH CONSTRUCTION, LLC | TULSA, OK | CrossFirst Bank |
| $1–2 million | ELYNX TEHNOLOGIES, LLC | TULSA, OK | Blue Sky Bank |
| $150,000–350,000 | EMC ELECTRICAL MECHANICAL COMPANY | TULSA, OK | American Heritage Bank |
| $150,000–350,000 | EMERGE MEDICAL & WELL SPA, LLC | TULSA, OK | MidFirst Bank |
| $150,000–350,000 | EMERGENCY INFANT SERVICES, INC | TULSA, OK | BOKF, National Association |
| $350,000–1 million | EMPIRE FENCE CO. INC. | TULSA, OK | Security Bank |
| $350,000–1 million | ENACOMM, INC. | TULSA, OK | Security Bank |
| $150,000–350,000 | ENCINOS 3D CUSTOM PRODUCTS LLC | TULSA, OK | Arvest Bank |
| $150,000–350,000 | ENCORE COMMUNICATIONS INC | TULSA, OK | Regent Bank |
| $150,000–350,000 | ENDEX, INC. OF TULSA | TULSA, OK | First Bank of Owasso |
| $1–2 million | ENERGY EXCHANGER COMPANY | TULSA, OK | Prosperity Bank |
| $2–5 million | ENERGY PROCESS TECHNOLOGIES INC | TULSA, OK | Prosperity Bank |
| $1–2 million | ENVIRONMENTAL ACTION, INC | TULSA, OK | Simmons Bank |
| $150,000–350,000 | ENVIRONMENTAL LOOP SERVICES, INC. | TULSA, OK | Security Bank |
| $350,000–1 million | EPPERLEY CONSTRUCTION SERVICES, LLC | TULSA, OK | Arvest Bank |
| $150,000–350,000 | EQUUS ENVIRONMENTAL, LLC | TULSA, OK | First United Bank and Trust Company |
| $150,000–350,000 | EQUUS METALS INC | TULSA, OK | The Central Trust Bank |
| $350,000–1 million | ESDC, INC | TULSA, OK | Grand Bank |
| $150,000–350,000 | ETERNAL WORD MINISTRIES | TULSA, OK | First Bank of Owasso |
| $150,000–350,000 | ETI, INC | TULSA, OK | Regent Bank |
| $150,000–350,000 | EUROCRAFT LTD. | TULSA, OK | Grand Bank |