| 401 | 409 | Planetary Science Institute | 1935 | 577 | 626 | 911 |
| 402 | 2603 | Pittsburgh Supercomputing Center | 2196 | 465 | 2538 | 3879 |
| 403 | 5399 | Pittsburgh Mercy Health System | 7843 | 3471 | 2538 | 3879 |
| 404 | 4670 | Pinchot Institute for Conservation | 4459 | 2946 | 2538 | 3879 |
| 405 | 3716 | Phoenix VA Health Care System | 6194 | 6269 | 2538 | 2039 |
| 406 | 7563 | Phoenix Heart Center | 8091 | 6807 | 2538 | 3879 |
| 407 | 2529 | Philadelphia VA Medical Center | 6427 | 6688 | 2538 | 467 |
| 408 | 5276 | Philadelphia Hand to Shoulder Center | 7212 | 5078 | 2538 | 3509 |
| 409 | 1340 | Peterson Institute for International Economics | 1182 | 196 | 524 | 3879 |
| 410 | 5217 | Perry Institute for Marine Science | 6273 | 4562 | 2538 | 3660 |
| 411 | 355 | Pennington Biomedical Research Center | 2295 | 948 | 245 | 448 |
| 412 | 7292 | Pelosi Medical Center | 7468 | 6675 | 2538 | 3879 |
| 413 | 4478 | Pediatrix Medical Group | 2679 | 2772 | 2538 | 3879 |
| 414 | 5803 | Peachtree Orthopaedic Clinic | 7041 | 4339 | 2538 | 3879 |
| 415 | 2900 | PeaceHealth Southwest Medical Center (Southwest Washington Medical Center) | 1077 | 745 | 2538 | 3879 |
| 416 | 5497 | Patuxent Wildlife Research Center | 3468 | 4214 | 2538 | 3879 |
| 417 | 5620 | Partners HealthCare Personalized Medicine Genetics and Genomics | 6722 | 4099 | 2538 | 3879 |
| 418 | 5598 | Parkinson's Institute | 7634 | 3849 | 2538 | 3879 |
| 419 | 6412 | Paparella Ear Head and Neck Institute | 6788 | 5304 | 2538 | 3879 |
| 420 | 4042 | Pankey Institute | 4658 | 1933 | 2538 | 3879 |
| 421 | 426 | Palo Alto Research Center | 2710 | 363 | 317 | 1473 |
| 422 | 1491 | Palo Alto Medical Foundation | 4135 | 446 | 2538 | 2867 |
| 423 | 3431 | Pacific Whale Foundation | 4671 | 1152 | 2538 | 3879 |
| 424 | 5403 | Pacific Rim Conservation | 6414 | 5377 | 2538 | 3509 |
| 425 | 1177 | Pacific Northwest National Laboratory | 441 | 211 | 27 | 3879 |
| 426 | 4971 | Pacific Northwest Diabetes Research Institute | 7012 | 4003 | 2445 | 3879 |
| 427 | 6572 | Pacific International Center for High Technology Research | 6430 | 5601 | 2538 | 3879 |
| 428 | 2614 | Pacific Institute for Studies in Development Environment and Security | 2749 | 458 | 2538 | 3879 |
| 429 | 1375 | Pacific Institute for Research and Evaluation | 4431 | 2147 | 1798 | 2002 |
| 430 | 6840 | Pacific Health Research and Education Institute Hawaii | 7684 | 6601 | 2538 | 3660 |
| 431 | 6523 | Overton Brooks VA Medical Center Shreveport LA | 7064 | 7126 | 2538 | 3316 |
| 432 | 6095 | Outcomes Research Institute | 4719 | 5011 | 2538 | 3879 |
| 433 | 4319 | Osiris Therapeutics | 3743 | 2436 | 2538 | 3879 |
| 434 | 2524 | OSF Saint Francis Medical Center | 894 | 954 | 2258 | 3879 |
| 435 | 7242 | Oscar G. Johnson VA Medical Center | 6295 | 7315 | 2538 | 3660 |
| 436 | 7122 | Orthopaedic Research of Virginia | 5884 | 6526 | 2538 | 3879 |
| 437 | 7235 | Orlando Clinical Research Center | 7368 | 6589 | 2538 | 3879 |
| 438 | 6930 | Orentreich Foundation for Advancement of Science | 6922 | 6151 | 2538 | 3879 |
| 439 | 1624 | Oregon Social Learning Centre | 4795 | 3258 | 1957 | 1891 |
| 440 | 746 | Oregon Research Institute | 4596 | 1337 | 346 | 1380 |
| 441 | 3110 | Oregon Institute of Science and Medicine | 6107 | 741 | 2538 | 3879 |
| 442 | 4142 | Oregon College of Oriental Medicine | 4017 | 2300 | 2521 | 3879 |
| 443 | 4351 | Oregon Clinic | 4304 | 2446 | 2538 | 3879 |
| 444 | 7624 | Ontario Hydro Energy | 8091 | 6958 | 2538 | 3879 |
| 445 | 6790 | Ontar Corporation | 7725 | 5743 | 2538 | 3879 |
| 446 | 5111 | Omega-3 Research Institute | 7945 | 2904 | 2538 | 3879 |
| 447 | 4825 | Olive View UCLA Medical Center | 6277 | 5506 | 2538 | 3252 |
| 448 | 6304 | Olin Neuropsychiatry Research Center | 7137 | 5079 | 2538 | 3879 |
| 449 | 5776 | Oklahoma State University Medical Center | 6695 | 4355 | 2538 | 3879 |
| 450 | 685 | Oklahoma Medical Research Foundation | 2917 | 1694 | 607 | 865 |
| 451 | 4734 | Oklahoma Blood Institute | 6351 | 2880 | 2538 | 3879 |
| 452 | 3295 | Ohio Supercomputer Center | 2823 | 1052 | 2538 | 3879 |
| 453 | 2633 | Ohio Aerospace Institute | 6129 | 3105 | 2538 | 2510 |
| 454 | 4937 | Ogden Clinic | 5040 | 3284 | 2538 | 3879 |
| 455 | 5077 | Office of Public Health and Environmental Hazards | 5431 | 3441 | 2538 | 3879 |
| 456 | 3353 | Office of Naval Research | 2182 | 2970 | 2538 | 3316 |
| 457 | 4565 | Ocular Immunology and Uveitus Foundation | 5188 | 2710 | 2538 | 3879 |
| 458 | 5188 | Oceanic Institute | 7271 | 3367 | 2538 | 3879 |
| 459 | 7186 | Ocala Heart and Vascular Institute | 7553 | 6471 | 2538 | 3879 |
| 460 | 21 | Oak Ridge National Laboratory | 240 | 46 | 23 | 54 |
| 461 | 922 | Oak Ridge Institute for Science and Education | 4113 | 899 | 2538 | 834 |
| 462 | 45 | NYU Langone Medical Center | 451 | 203 | 198 | 32 |
| 463 | 2526 | Nuclear Energy Institute | 3812 | 371 | 2538 | 3879 |
| 464 | 1758 | Novant Health (Presbyterian Healthcare) | 728 | 844 | 2377 | 3316 |
| 465 | 7133 | Norwood Clinic | 7767 | 6303 | 2538 | 3879 |
| 466 | 4275 | Norwalk Hospital | 4350 | 2325 | 2538 | 3879 |
| 467 | 1493 | Northwestern Medicine (Northwestern Memorial Hospital) | 573 | 370 | 442 | 3879 |
| 468 | 6523 | Northwest Orthopaedic Institute | 7255 | 5413 | 2538 | 3879 |
| 469 | 4099 | Northwest Hospital & Medical Center | 4022 | 2064 | 2538 | 3879 |
| 470 | 544 | Northwell Health (formerly North Shore-LIJ Health System) | 485 | 316 | 111 | 2487 |
| 471 | 342 | Northshore University Healthsystem | 809 | 712 | 586 | 537 |
| 472 | 6960 | Northern Rockies Conservation Cooperative | 8011 | 5721 | 2538 | 3879 |
| 473 | 7829 | Northern California Research Corporation | 7553 | 7613 | 2538 | 3879 |
| 474 | 3906 | Northeast Midwest Institute | 5943 | 1653 | 2538 | 3879 |
| 475 | 2653 | North Florida/South Georgia Veterans Health System | 5271 | 5832 | 2538 | 1084 |
| 476 | 1536 | NORC University of Chicago | 1581 | 290 | 1070 | 3879 |
| 477 | 1229 | NOAA National Weather Service | 12 | 18 | 2538 | 3879 |
| 478 | 4871 | NOAA Great Lakes Environmental Research Laboratory | 1633 | 3431 | 2538 | 3879 |
| 479 | 4711 | NIH Intramural Sequencing Center | 7684 | 7297 | 2538 | 1992 |
| 480 | 5310 | NIH Department of Clinical Bioethics | 6531 | 3646 | 2538 | 3879 |
| 481 | 1389 | Nicklaus Children's Hospital (Miami Children's Hospital Pediatric Healthcare) | 1605 | 1199 | 2538 | 1813 |
| 482 | 1780 | Newton Wellesley Hospital | 4154 | 1668 | 2538 | 2141 |
| 483 | 2064 | New York State Institute for Basic Research in Developmental Disabilities | 3144 | 1943 | 2538 | 2487 |
| 484 | 147 | New York Presbyterian University Hospital of Columbia and Cornell | 741 | 328 | 650 | 177 |
| 485 | 5182 | New York Headache Center | 5025 | 3610 | 2538 | 3879 |
| 486 | 3158 | New York Eye Cancer Center | 5879 | 2229 | 2538 | 3316 |
| 487 | 1025 | New York Eye and Ear Infirmary | 4622 | 1293 | 2319 | 1288 |
| 488 | 384 | New York Botanical Garden | 291 | 183 | 1309 | 1596 |
| 489 | 2406 | New York Blood Center | 5460 | 1151 | 1249 | 3879 |
| 490 | 1326 | New York Academy of Medicine | 2288 | 759 | 2538 | 2104 |
| 491 | 6143 | New Mexico Petroleum Recovery Research Center | 7174 | 4822 | 2538 | 3879 |
| 492 | 4297 | New Mexico Clinical Research and Osteoporosis Center | 7406 | 5668 | 2538 | 2822 |
| 493 | 7629 | New Jersey Equine Clinic | 7740 | 7226 | 2538 | 3879 |
| 494 | 4861 | New Jersey Center for Biomaterials | 5986 | 4642 | 2538 | 3509 |
| 495 | 6557 | New Iberia Research Center | 7733 | 5352 | 2538 | 3879 |
| 496 | 6504 | New Hampshire Musculoskeletal Institute | 6299 | 5485 | 2538 | 3879 |
| 497 | 1989 | New England Complex Systems Institute | 4172 | 737 | 2355 | 3509 |
| 498 | 4367 | Neuroscience Education Institute | 5175 | 3893 | 2538 | 3509 |
| 499 | 3574 | Neuropsychiatric Research Institute | 7285 | 6104 | 2538 | 1920 |
| 500 | 5909 | NeuroDevelopment Center | 7133 | 4493 | 2538 | 3879 |
