| $350,000–1 million | OIL RE-REFINING COMPANY, INC. | PORTLAND, OR | Umpqua Bank |
| $1–2 million | OKANOGAN COUNTY PUBLIC HOSPITAL DIST # 4 | TONASKET, WA | Umpqua Bank |
| $150,000–350,000 | OKSENHOLT CAPITAL, INC. | LINCOLN CITY, OR | Umpqua Bank |
| $150,000–350,000 | OLALLA CENTER | TOLEDO, OR | Umpqua Bank |
| $350,000–1 million | OLD TOWN GLASS INC. | Novato, CA | Umpqua Bank |
| $350,000–1 million | OLD TOWN GLASS, INC. | NOVATO, CA | Umpqua Bank |
| $150,000–350,000 | OLDLAND DISTRIBUTING | Central Point, OR | Umpqua Bank |
| $150,000–350,000 | OLEG A SHVARTSUR DDS PLLC | ISSAQUAH, WA | Umpqua Bank |
| $150,000–350,000 | OLEG A. SHVARTSUR DDS PLLC | Issaquah, WA | Umpqua Bank |
| $150,000–350,000 | OLESYA Z SALATHE DMD LLC | Molalla, OR | Umpqua Bank |
| $150,000–350,000 | OLESYA Z. SALATHE DMD, LLC | Molalla, OR | Umpqua Bank |
| $150,000–350,000 | OLSEN CHIROPRACTIC L.L.C. | VANCOUVER, WA | Umpqua Bank |
| $150,000–350,000 | OLSON & JONES CONSTRUCTION INC. | Portland, OR | Umpqua Bank |
| $150,000–350,000 | OLSON & JONES CONSTRUCTION, INC | PORTLAND, OR | Umpqua Bank |
| $350,000–1 million | OLSON MEAT COMPANY | ORLAND, CA | Umpqua Bank |
| $150,000–350,000 | OLSTEDT TRUCKING, INC. | SEASIDE, OR | Umpqua Bank |
| $150,000–350,000 | OLYMPIA OYSTER COMPANY | Shelton, WA | Umpqua Bank |
| $150,000–350,000 | OLYMPIA OYSTER COMPANY | SHELTON, WA | Umpqua Bank |
| $150,000–350,000 | OLYMPIC DERMATOLOGY AND LASER CLINIC PS | OLYMPIA, WA | Umpqua Bank |
| $150,000–350,000 | OLYMPIC DERMATOLOGY AND LASER CLINIC PS | Olympia, WA | Umpqua Bank |
| $350,000–1 million | OMB ELECTRICAL ENGINEERS INC | IRVINE, CA | Umpqua Bank |
| $150,000–350,000 | OMICS DATA AUTOMATION INC | Beaverton, OR | Umpqua Bank |
| $150,000–350,000 | OMICS DATA AUTOMATION INC. | BEAVERTON, OR | Umpqua Bank |
| $350,000–1 million | OMNI COMMUNITY MANAGEMENT, LLC | FAIR OAKS, CA | Umpqua Bank |
| $150,000–350,000 | ON POINT ORCHARDS LLC | BREWSTER, WA | Umpqua Bank |
| $350,000–1 million | ON POINT ORCHARDS LLC FKA JD ORCHARDS | Brewster, WA | Umpqua Bank |
| $150,000–350,000 | ON THE BOARDS | SEATTLE, WA | Umpqua Bank |
| $350,000–1 million | ON-SITE SERVICES, LLC | Boise, ID | Umpqua Bank |
| $350,000–1 million | ON-SITE SERVICES, LLC | BOISE, ID | Umpqua Bank |
| $350,000–1 million | ONE LLC | NAMPA, ID | Umpqua Bank |
| $150,000–350,000 | ONE LLC | Nampa, ID | Umpqua Bank |
| $150,000–350,000 | ONE OF A KIND TRUCKING LLC | Gresham, OR | Umpqua Bank |
| $350,000–1 million | ONE TRUE VINE LLC | SAINT HELENA, CA | Umpqua Bank |
| $350,000–1 million | ONEILL PLUMBING COMPANY | Seattle, WA | Umpqua Bank |
| $150,000–350,000 | ONSITE TRUCK REPAIR SERVICES, INC. | ONTARIO, CA | Umpqua Bank |
| $150,000–350,000 | ONTARIO WEISER INVESTORS LLC | VANCOUVER, WA | Umpqua Bank |
| $350,000–1 million | ONTIME SERVICES LLC | BATTLE GROUND, WA | Umpqua Bank |
| $150,000–350,000 | OPEN ARMS PERINATAL SERVICES | Seattle, WA | Umpqua Bank |
| $150,000–350,000 | OPEN ARMS PERINATAL SERVICES | SEATTLE, WA | Umpqua Bank |
| $350,000–1 million | OPPORTUNITY CONNECTIONS, INC. | Hood River, OR | Umpqua Bank |
| $150,000–350,000 | OPPORTUNITY INTERACTIVE, INC. | SEATAC, WA | Umpqua Bank |
| $150,000–350,000 | OR CTR/CLINICAL INVESTIGA. INC | Eugene, OR | Umpqua Bank |
| $150,000–350,000 | ORCAL MANAGEMENT COMPANY | PALO ALTO, CA | Umpqua Bank |
| $150,000–350,000 | ORDAZ FARM LABOR CONTRACTORS LLC | Sonoma, CA | Umpqua Bank |
| $150,000–350,000 | OREGON ADJUSTERS INC. | Central Point, OR | Umpqua Bank |
| $150,000–350,000 | OREGON ADJUSTERS, INC. | CENTRAL POINT, OR | Umpqua Bank |
| $350,000–1 million | OREGON BERRY PACKING INC. | Hillsboro, OR | Umpqua Bank |
| $1–2 million | OREGON BREWING COMPANY | Newport, OR | Umpqua Bank |
| $2–5 million | OREGON BREWING COMPANY DBA ROGUE ALES & SPIRITS | NEWPORT, OR | Umpqua Bank |
| $1–2 million | OREGON CASCADE PLUMBING AND HEATING INC | SALEM, OR | Umpqua Bank |
| $1–2 million | OREGON CASCADE PLUMBING AND HEATING INC. | Salem, OR | Umpqua Bank |
| $150,000–350,000 | OREGON CENTER FOR CLINICAL INVESTIGATIONS, INC. | EUGENE, OR | Umpqua Bank |
| $1–2 million | OREGON COAST COMMUNITY ACTION | COOS BAY, OR | Umpqua Bank |
| $150,000–350,000 | OREGON CUSTOM CABINETS INC | Canby, OR | Umpqua Bank |
| $150,000–350,000 | OREGON ENVIRONMENTAL COUNCIL | Portland, OR | Umpqua Bank |
| $150,000–350,000 | OREGON ENVIRONMENTAL COUNCIL, INC. | PORTLAND, OR | Umpqua Bank |
| $350,000–1 million | OREGON HEART CENTER, P.C. | SALEM, OR | Umpqua Bank |
| $2–5 million | OREGON HUMANE SOCIETY | PORTLAND, OR | Umpqua Bank |
| $150,000–350,000 | OREGON LINEN, INC. | ROSEBURG, OR | Umpqua Bank |
| $150,000–350,000 | OREGON LIONS SIGHT & HEARING FOUNDATION | PORTLAND, OR | Umpqua Bank |
| $150,000–350,000 | OREGON LIONS SIGHT AND HEARING FOUNDATION | Portland, OR | Umpqua Bank |
| $350,000–1 million | OREGON LUNG SPECIALISTS LLC | Springfield, OR | Umpqua Bank |
| $350,000–1 million | OREGON LUNG SPECIALISTS, LLC | SPRINGFIELD, OR | Umpqua Bank |
| $150,000–350,000 | OREGON NORTH STAR RESTAURANTS, LLC | VANCOUVER, WA | Umpqua Bank |
| $150,000–350,000 | OREGON OCCUPATIONAL MEDICINE INC | TUALATIN, OR | Umpqua Bank |
| $150,000–350,000 | OREGON PEDORTHIC SERVICES INC | Gresham, OR | Umpqua Bank |
| $350,000–1 million | OREGON PETROLEUM TRANSPORT CO | Salem, OR | Umpqua Bank |
| $350,000–1 million | OREGON PETROLEUM TRANSPORT, INC. | Salem, OR | Umpqua Bank |
| $150,000–350,000 | OREGON PIP DENTAL GROUP, PC | SALEM, OR | Umpqua Bank |
| $350,000–1 million | OREGON PRIDE NURSERIES INC | Mcminnville, OR | Umpqua Bank |
| $150,000–350,000 | OREGON RETRIEVERS LLC | PHOENIX, OR | Umpqua Bank |
| $150,000–350,000 | OREGON RETRIEVERS LLC | PHOENIX, OR | Umpqua Bank |
| $350,000–1 million | OREGON SCREW MACHINE PRODUCTS, INC. | PORTLAND, OR | Umpqua Bank |
| $350,000–1 million | OREGON STATE UNIVERSITY BOOKSTORE INC | CORVALLIS, OR | Umpqua Bank |
| $350,000–1 million | OREGON STATE UNIVERSITY BOOKSTORE, INC | CORVALLIS, OR | Umpqua Bank |
| $350,000–1 million | OREGON SURGICENTER, LLC | Springfield, OR | Umpqua Bank |
| $2–5 million | OREGON SYMPHONY ASSOCIATION | PORTLAND, OR | Umpqua Bank |
| $1–2 million | OREGON SYMPHONY ASSOCIATION | Portland, OR | Umpqua Bank |
| $150,000–350,000 | OREGON WEB PRESS, INC. | ALBANY, OR | Umpqua Bank |
| $150,000–350,000 | OREGON WEST ENTERPRISES LLC | Creswell, OR | Umpqua Bank |
| $350,000–1 million | OREGON WOODS INC | Eugene, OR | Umpqua Bank |
| $150,000–350,000 | OREGON WOODS INC | EUGENE, OR | Umpqua Bank |
| $150,000–350,000 | OREGON WORSTED COMPANY | Portland, OR | Umpqua Bank |
| $150,000–350,000 | OREGON WORSTED COMPANY | PORTLAND, OR | Umpqua Bank |
| $1–2 million | OREGON-CANADIAN FOREST PRODUCTS INC. | North Plains, OR | Umpqua Bank |
| $1–2 million | OREGON-CANADIAN FOREST PRODUCTS, INC. | NORTH PLAINS, OR | Umpqua Bank |
| $2–5 million | ORENCO SYSTEMS, INC. | SUTHERLIN, OR | Umpqua Bank |
| $350,000–1 million | ORENEVA CONSTRUCTION INC | PORTLAND, OR | Umpqua Bank |
| $350,000–1 million | ORGANIC CONSULTANTS, INC | EUGENE, OR | Umpqua Bank |
| $150,000–350,000 | ORGANIZATION FOR EDUCATIONAL TECHNOLOGY AND CURRICULUM | SALEM, OR | Umpqua Bank |
| $2–5 million | ORION INDUSTRIES | AUBURN, WA | Umpqua Bank |
| $2–5 million | ORION INDUSTRIES | Auburn, WA | Umpqua Bank |
| $2–5 million | ORM MANAGEMENT INC | Portland, OR | Umpqua Bank |
| $150,000–350,000 | ORMOND LLC | Auburn, WA | Umpqua Bank |
| $150,000–350,000 | ORMOND, LLC | AUBURN, WA | Umpqua Bank |
| $1–2 million | OROVILLE REMAN & RELOAD, INC. | OROVILLE, WA | Umpqua Bank |
| $2–5 million | ORTHOPEDIC & FRACTURE CLINIC, P.C. | PORTLAND, OR | Umpqua Bank |
| $350,000–1 million | ORTHOPEDICS NORTHWEST PC | Tigard, OR | Umpqua Bank |
| $2–5 million | OSF INTERNATIONAL INC. | Portland, OR | Umpqua Bank |
| $5–10 million | OSF INTERNATIONAL, INC. | PORTLAND, OR | Umpqua Bank |