| 501 | 5188 | Oceanic Institute | 7271 | 3367 | 2538 | 3879 |
| 502 | 4142 | Oregon College of Oriental Medicine | 4017 | 2300 | 2521 | 3879 |
| 503 | 7235 | Orlando Clinical Research Center | 7368 | 6589 | 2538 | 3879 |
| 504 | 4937 | Ogden Clinic | 5040 | 3284 | 2538 | 3879 |
| 505 | 6476 | Hipple Cancer Research Center | 6230 | 5458 | 2538 | 3879 |
| 506 | 3110 | Oregon Institute of Science and Medicine | 6107 | 741 | 2538 | 3879 |
| 507 | 6760 | VA Office of Information & Technology | 633 | 6338 | 2538 | 3879 |
| 508 | 5111 | Omega-3 Research Institute | 7945 | 2904 | 2538 | 3879 |
| 509 | 6643 | National Pediatric Myoclonus Center | 7532 | 5567 | 2538 | 3879 |
| 510 | 6790 | Ontar Corporation | 7725 | 5743 | 2538 | 3879 |
| 511 | 7624 | Ontario Hydro Energy | 8091 | 6958 | 2538 | 3879 |
| 512 | 6095 | Outcomes Research Institute | 4719 | 5011 | 2538 | 3879 |
| 513 | 4351 | Oregon Clinic | 4304 | 2446 | 2538 | 3879 |
| 514 | 6930 | Orentreich Foundation for Advancement of Science | 6922 | 6151 | 2538 | 3879 |
| 515 | 7122 | Orthopaedic Research of Virginia | 5884 | 6526 | 2538 | 3879 |
| 516 | 3295 | Ohio Supercomputer Center | 2823 | 1052 | 2538 | 3879 |
| 517 | 2524 | OSF Saint Francis Medical Center | 894 | 954 | 2258 | 3879 |
| 518 | 4319 | Osiris Therapeutics | 3743 | 2436 | 2538 | 3879 |
| 519 | 5776 | Oklahoma State University Medical Center | 6695 | 4355 | 2538 | 3879 |
| 520 | 3431 | Pacific Whale Foundation | 4671 | 1152 | 2538 | 3879 |
| 521 | 2614 | Pacific Institute for Studies in Development Environment and Security | 2749 | 458 | 2538 | 3879 |
| 522 | 3002 | David and Lucile Packard Foundation | 2535 | 773 | 2538 | 3879 |
| 523 | 6227 | University of Washington College of Forest Resources | 7396 | 4910 | 2538 | 3879 |
| 524 | 4042 | Pankey Institute | 4658 | 1933 | 2538 | 3879 |
| 525 | 5598 | Parkinson's Institute | 7634 | 3849 | 2538 | 3879 |
| 526 | 6825 | Trinity Regional Hospital Fort Dodge | 7475 | 5883 | 2538 | 3879 |
| 527 | 2900 | PeaceHealth Southwest Medical Center (Southwest Washington Medical Center) | 1077 | 745 | 2538 | 3879 |
| 528 | 5803 | Peachtree Orthopaedic Clinic | 7041 | 4339 | 2538 | 3879 |
| 529 | 4478 | Pediatrix Medical Group | 2679 | 2772 | 2538 | 3879 |
| 530 | 6412 | Paparella Ear Head and Neck Institute | 6788 | 5304 | 2538 | 3879 |
| 531 | 7292 | Pelosi Medical Center | 7468 | 6675 | 2538 | 3879 |
| 532 | 3046 | Property and Environment Research Center | 3062 | 790 | 2538 | 3879 |
| 533 | 5620 | Partners HealthCare Personalized Medicine Genetics and Genomics | 6722 | 4099 | 2538 | 3879 |
| 534 | 6447 | Postgraduate Center for Mental Health | 7580 | 5230 | 2538 | 3879 |
| 535 | 3708 | DoD Food Analysis and Diagnostics | 3653 | 1518 | 2538 | 3879 |
| 536 | 6572 | Pacific International Center for High Technology Research | 6430 | 5601 | 2538 | 3879 |
| 537 | 1340 | Peterson Institute for International Economics | 1182 | 196 | 524 | 3879 |
| 538 | 4670 | Pinchot Institute for Conservation | 4459 | 2946 | 2538 | 3879 |
| 539 | 7442 | Kushner Electroplating School | 7775 | 6874 | 2538 | 3879 |
| 540 | 5399 | Pittsburgh Mercy Health System | 7843 | 3471 | 2538 | 3879 |
| 541 | 1177 | Pacific Northwest National Laboratory | 441 | 211 | 27 | 3879 |
| 542 | 4971 | Pacific Northwest Diabetes Research Institute | 7012 | 4003 | 2445 | 3879 |
| 543 | 2669 | Point Blue (Point Reyes Bird Observatory) | 3605 | 1544 | 1434 | 3879 |
| 544 | 2764 | National Capital Poison Center | 5531 | 499 | 2538 | 3879 |
| 545 | 4384 | VA Polytrauma System of Care | 7193 | 2205 | 2538 | 3879 |
| 546 | 7689 | VA Medical Center Poplar Bluff Missouri | 7598 | 7385 | 2538 | 3879 |
| 547 | 6050 | Plano Orthopedic and Sports Medicine Center | 5859 | 4843 | 2538 | 3879 |
| 548 | 3830 | Potomac Institute for Policy Studies | 3185 | 1728 | 2538 | 3879 |
| 549 | 4161 | Powder Coating Institute | 5175 | 2067 | 2538 | 3879 |
| 550 | 6346 | Premier Bone & Joint Centers (Gem City Bone and Joint Clinic) | 5964 | 5281 | 2538 | 3879 |
| 551 | 6888 | Presbyterian Ear Institute | 7617 | 5950 | 2538 | 3879 |
| 552 | 7386 | VA Health Care System Northern Arizona | 7086 | 6885 | 2538 | 3879 |
| 553 | 7638 | VHA National Center for Health Promotion & Disease Prevention | 5729 | 7403 | 2538 | 3879 |
| 554 | 7697 | Proteogenomics Research Institute for Systems Medicine | 7904 | 7270 | 2538 | 3879 |
| 555 | 6981 | Prosthetics and Sensory Aids Service | 7030 | 6230 | 2538 | 3879 |
| 556 | 1360 | Providence Saint John's Health Center | 42 | 246 | 947 | 3879 |
| 557 | 6332 | Providence Medical Group (South Carolina Heart Center) | 6832 | 5185 | 2538 | 3879 |
| 558 | 7076 | Prosthetics Research Study | 7389 | 6307 | 2538 | 3879 |
| 559 | 2603 | Pittsburgh Supercomputing Center | 2196 | 465 | 2538 | 3879 |
| 560 | 3774 | National Center for Posttraumatic Stress Disorder | 3434 | 1626 | 2538 | 3879 |
| 561 | 5077 | Office of Public Health and Environmental Hazards | 5431 | 3441 | 2538 | 3879 |
| 562 | 5497 | Patuxent Wildlife Research Center | 3468 | 4214 | 2538 | 3879 |
| 563 | 4525 | Queen's Medical Center Honolulu Hawaii | 6809 | 2486 | 2538 | 3879 |
| 564 | 7536 | Quality Enhancement Research Initiative | 5460 | 7237 | 2538 | 3879 |
| 565 | 6197 | Radiology Associates of Tallahassee | 7106 | 4931 | 2538 | 3879 |
| 566 | 5650 | Rapid City Medical Center | 5831 | 4231 | 2538 | 3879 |
| 567 | 6202 | Rehabilitation Research and Development Service | 1458 | 5430 | 2538 | 3879 |
| 568 | 6256 | Reproductive Genetics Institute | 7864 | 4731 | 2538 | 3879 |
| 569 | 8072 | Research and Development Iowa City VA Medical Center | 7455 | 8071 | 2538 | 3879 |
| 570 | 5028 | VA Office of Research & Development | 560 | 3820 | 2538 | 3879 |
| 571 | 3766 | IBM Research | 6538 | 1438 | 2538 | 3879 |
| 572 | 6672 | Retina Research Foundation | 7159 | 5694 | 2538 | 3879 |
| 573 | 2291 | American College of Rheumatology | 3942 | 252 | 2538 | 3879 |
| 574 | 4359 | Riverside Research Institute | 6103 | 4142 | 1903 | 3879 |
| 575 | 4920 | Riverview Medical Center | 5399 | 3232 | 2538 | 3879 |
| 576 | 2194 | Rocky Mountain Institute | 2553 | 215 | 2538 | 3879 |
| 577 | 5144 | Rocky Mountain Poison and Drug Center | 6836 | 3384 | 2538 | 3879 |
| 578 | 2202 | Rockefeller Foundation | 3248 | 210 | 2538 | 3879 |
| 579 | 6221 | Romark Institute for Medical Research | 7300 | 4922 | 2538 | 3879 |
| 580 | 7935 | VA HSR&D/RR&D Rehabilitation Outcomes Research Center | 8011 | 7674 | 2538 | 3879 |
| 581 | 7751 | Roskamp Institute | 7954 | 7344 | 2538 | 3879 |
| 582 | 7396 | Veterans Rural Health Resource Center Western Region | 5942 | 7008 | 2538 | 3879 |
| 583 | 2132 | Robert Wood Johnson Medical School | 1615 | 1287 | 271 | 3879 |
| 584 | 3755 | Warren Clinic | 3114 | 1610 | 2538 | 3879 |
| 585 | 4442 | Sansum Clinic | 3685 | 2630 | 2538 | 3879 |
| 586 | 3894 | SBH Health System | 2900 | 2963 | 2316 | 3879 |
| 587 | 2139 | Sanford Burnham Prebys Medical Discovery Institute (Sanford-Burnham Medical Research Institute) | 2598 | 1266 | 256 | 3879 |
| 588 | 3284 | Southern California Coastal Water Research Project | 2418 | 2988 | 1131 | 3879 |
| 589 | 3942 | MSFC Science Research Office (National Space Science & Technology Center) | 7518 | 1539 | 2538 | 3879 |
| 590 | 3947 | Southern California Orthopedic Institute | 4328 | 1808 | 2538 | 3879 |
| 591 | 2177 | Scripps Institution of Oceanography | 856 | 243 | 2538 | 3879 |
| 592 | 1227 | San Diego Supercomputer Center | 338 | 148 | 601 | 3879 |
| 593 | 8001 | Seattle Epidemiologic Research and Information Center | 7634 | 7953 | 2538 | 3879 |
| 594 | 7422 | Seattle Allergy & Asthma Research Institute | 7864 | 6786 | 2538 | 3879 |
| 595 | 7320 | Seattle Prostate Institute at Swedish Medical Center | 7380 | 6735 | 2538 | 3879 |
| 596 | 5955 | Semmes-Murphy Neurologic and Spine Institute | 6676 | 4611 | 2538 | 3879 |
| 597 | 3896 | Southeast Regional Climate Center | 2032 | 1884 | 2538 | 3879 |
| 598 | 6497 | Shea Ear Clinic | 6661 | 5445 | 2538 | 3879 |
| 599 | 7634 | Sheridan VA Medical Center | 7374 | 7301 | 2538 | 3879 |
| 600 | 3469 | Boston Shriners Hospital | 8011 | 813 | 2538 | 3879 |
