| ADVANCED PERIODONTICS & ORAL IMPLANTOLOGY, P.C. | — | 27121797 | 2005-02-23 | Inactive | |
| ADVANCED PERIPHERAL ENTERPRISES, INC. | — | 16727919 | 1983-03-10 | Inactive | MILWAUKIE |
| ADVANCED PERSONNEL SOLUTIONS, INC. | — | 33510397 | 2006-01-31 | Inactive | MEDFORD |
| ADVANCED PERSONNEL STAFFING, LLC | — | 53924099 | 2008-08-07 | Inactive | |
| ADVANCED PERSPECTIVE INSPECTIONS LLC | — | 144464898 | 2018-05-30 | Inactive | SPRINGFIELD |
| ADVANCED PET DENTISTRY, LLC | — | 52656395 | 2008-06-17 | Active | CORVALLIS |
| ADVANCED PHARMACY CONCEPTS, INC. | — | 124799990 | 2016-09-08 | Inactive | SHARON HILL |
| ADVANCED PHARMACY, LLC | — | 208162198 | 2023-02-24 | Active | GREENVILLE |
| ADVANCED PHEROMONE TECHNOLOGIES, INC. | — | 37448495 | 2006-07-27 | Inactive | |
| ADVANCED PHEROMONE TECHNOLOGIES, INC. | — | 37449196 | 2006-07-27 | Inactive | PORTLAND |
| ADVANCED PHOTO & IMAGING LLC | — | 6669295 | 2002-02-26 | Inactive | ASHLAND |
| ADVANCED PHYSICAL THERAPY AND ORTHOPEDIC REHABILITATION, P.C. | — | 19515790 | 2004-01-13 | Inactive | MEDFORD |
| ADVANCED PIPING, INC. | — | 6751283 | 1987-03-10 | Inactive | |
| ADVANCED PIPING, INC. | — | 20219812 | 1984-08-07 | Inactive | PORTLAND |
| ADVANCED PLANNING GROUP, LLC | — | 5740097 | 2002-01-03 | Inactive | PORTLAND |
| ADVANCED PLANNING NURSE CONSULTANTS LLC | — | 217865096 | 2023-09-29 | Inactive | MEDFORD |
| ADVANCED PLANNING SOLUTIONS, LLC | — | 61831583 | 1998-02-17 | Inactive | LAKE OSWEGO |
| ADVANCED PLANNING STRATEGIES LTD | — | 66597585 | 1998-12-18 | Inactive | NEWBERG |
| ADVANCED PLANNING, INC. | — | 22373286 | 1990-11-01 | Inactive | CINCINNATI |
| ADVANCED PLASMA SYSTEMS, LLC | — | 55489786 | 1997-01-24 | Inactive | |
| ADVANCED PLASTERING, INC. | — | 41779588 | 1994-09-02 | Inactive | |
| ADVANCED PLASTERING, INC. | — | 13828785 | 1988-12-05 | Inactive | |
| ADVANCED PLASTERING, LLC. | — | 14505598 | 2003-04-23 | Inactive | |
| ADVANCED PLASTIC PRODUCTS INC. | — | 12899696 | 2003-02-08 | Inactive | |
| ADVANCED PLASTICS, INC. | — | 17259912 | 1983-11-15 | Active | SANDY |
| ADVANCED PLC, LLC | — | 33346495 | 2006-01-11 | Active | REDMOND |
| ADVANCED PLUMBING & MECHANICAL LLC | — | 240091595 | 2025-04-28 | Active | PORTLAND |
| ADVANCED PLUMBING AND HEATING INC. | — | 31945389 | 1992-11-06 | Inactive | BEND |
| ADVANCED PLUMBING AND MECHANICAL LLC | — | 49517493 | 2008-02-04 | Inactive | |
| ADVANCED PLUMBING INC. | — | 65505985 | 1998-10-13 | Inactive | |
| ADVANCED PLUMBING LLC | — | 40792798 | 2007-01-22 | Inactive | VANCOUVER |
| ADVANCED PLUMBING SERVICE LLC | — | 55398391 | 2008-10-20 | Inactive | GRESHAM |
| ADVANCED PLUMBING SOLUTIONS, LLC | — | 232013292 | 2024-10-15 | Active | BEND |
| ADVANCED PLUMBING SYSTEMS, INC. | — | 55875786 | 1997-02-13 | Inactive | OTIS |
| ADVANCED PLUMBING TECHNOLOGIES, CORP. | — | 61310380 | 1998-01-14 | Active | LA GRANDE |
| ADVANCED PNEUMATIC TUBES, INC. | — | 51482983 | 1996-04-30 | Active | BONNEY LAKE |
| ADVANCED POLYGRAPH SOLUTIONS, INCORPORATED | — | 13443890 | 2003-03-04 | Inactive | |
| ADVANCED POLYMERS INC. | — | 207496597 | 2023-02-09 | Inactive | YAMHILL |
| ADVANCED POOL AND SPA SERVICES, LLC | — | 114587397 | 2015-09-16 | Active | BEND |
| ADVANCED POST & PRESS, INC. | — | 43009380 | 1994-11-28 | Inactive | PORTLAND |
| ADVANCED POST AND PRESS INC | — | 54973798 | 2008-09-26 | Inactive | MILWAUKIE |
| ADVANCED POSTAL, INC. | — | 20043691 | 2004-02-10 | Inactive | WOODBURN |
| ADVANCED POSTFRAME STRUCTURES INC. | — | 28713691 | 2005-05-10 | Inactive | CARSON CITY |
| ADVANCED POWDER COATING, INC. | — | 28268290 | 2005-04-18 | Active | PORTLAND |
| ADVANCED POWDERED SUPPLEMENTS, INCORPORATED | — | 1065499 | 2001-03-20 | Inactive | |
| ADVANCED POWER PRODUCTS, INC. | — | 2667582 | 1986-03-26 | Inactive | PORTLAND |
| ADVANCED POWER SOLUTIONS, INC. | — | 27606185 | 1991-12-30 | Inactive | WEST LINN |
| ADVANCED POWER TECHNOLOGY, INC. | — | 20417010 | 1984-11-19 | Inactive | BEND |
| ADVANCED POWERING SERVICES, INC. | — | 135320596 | 2018-04-23 | Inactive | RANCHO SANTA MARGARITA |
| ADVANCED PRACTICE ANESTHESIA, LLC | — | 240812198 | 2025-05-13 | Active | EUGENE |