| 501 | 4094 | Western Research Institute | 7030 | 4975 | 2538 | 3034 |
| 502 | 4088 | United States Naval Observatory | 403 | 2432 | 2538 | 3879 |
| 503 | 4082 | University Health Care System Augusta | 2861 | 2106 | 2538 | 3879 |
| 504 | 4080 | Wells National Estuarine Research Reserve | 3410 | 2065 | 2538 | 3879 |
| 505 | 4074 | Asphalt Institute | 5995 | 1879 | 2538 | 3879 |
| 506 | 4074 | National Centers for Environmental Prediction | 208 | 3423 | 2538 | 3660 |
| 507 | 4068 | Vermont Institute Natural Science | 4187 | 2014 | 2538 | 3879 |
| 508 | 4062 | G.V. (Sonny) Montgomery VA Medical Center | 7424 | 6869 | 2538 | 1843 |
| 509 | 4053 | BioDiversity Research Institute | 5123 | 1912 | 2538 | 3879 |
| 510 | 4048 | Truman Medical Centers | 5160 | 1898 | 2538 | 3879 |
| 511 | 4042 | Pankey Institute | 4658 | 1933 | 2538 | 3879 |
| 512 | 4030 | CONRAD | 7288 | 3101 | 2538 | 3509 |
| 513 | 4022 | Bronx Lebanon Hospital Center | 4837 | 2412 | 2489 | 3879 |
| 514 | 4019 | Center for the Collaborative Classroom | 2569 | 2043 | 2538 | 3879 |
| 515 | 4003 | Triangle Universities Nuclear Laboratory | 2037 | 6791 | 2538 | 2104 |
| 516 | 4003 | Egg Nutrition Center | 4860 | 1861 | 2538 | 3879 |
| 517 | 3995 | Henry M Jackson Foundation for the Advancement of Military Medicine | 3513 | 1941 | 2538 | 3879 |
| 518 | 3985 | National Center for Voice and Speech | 4532 | 1854 | 2538 | 3879 |
| 519 | 3985 | Southern Research Station USDA Forest Service | 629 | 2167 | 2538 | 3879 |
| 520 | 3981 | Mallinckrodt Institute of Radiology | 4468 | 4515 | 778 | 3879 |
| 521 | 3965 | Herman & Walter Samuelson Children's Hospital at Sinai | 7157 | 1622 | 2538 | 3879 |
| 522 | 3958 | MEDNAX Phoenix Perinatal Associates | 2469 | 1948 | 2538 | 3879 |
| 523 | 3948 | Colorado Health Foundation | 4022 | 1834 | 2538 | 3879 |
| 524 | 3948 | Wilderness Medical Society | 4740 | 1785 | 2538 | 3879 |
| 525 | 3947 | Southern California Orthopedic Institute | 4328 | 1808 | 2538 | 3879 |
| 526 | 3942 | MSFC Science Research Office (National Space Science & Technology Center) | 7518 | 1539 | 2538 | 3879 |
| 527 | 3924 | Hennepin County Medical Center | 4409 | 1768 | 2538 | 3879 |
| 528 | 3922 | Hahnemann University Hospital | 5123 | 2600 | 2538 | 3660 |
| 529 | 3915 | Genomics Institute of the Novartis Research Foundation | 7022 | 7153 | 2538 | 1490 |
| 530 | 3909 | Mcleod Health | 2062 | 1910 | 2538 | 3879 |
| 531 | 3906 | Northeast Midwest Institute | 5943 | 1653 | 2538 | 3879 |
| 532 | 3905 | Saint Joseph's Hospital Health Center | 3899 | 1771 | 2538 | 3879 |
| 533 | 3902 | Huntington Medical Research Institute | 5311 | 3513 | 1786 | 3879 |
| 534 | 3899 | Institute for Molecular Manufacturing | 7498 | 2286 | 2538 | 3660 |
| 535 | 3896 | Southeast Regional Climate Center | 2032 | 1884 | 2538 | 3879 |
| 536 | 3894 | SBH Health System | 2900 | 2963 | 2316 | 3879 |
| 537 | 3892 | Bernheim Arboretum and Research Forest | 3148 | 1811 | 2538 | 3879 |
| 538 | 3892 | Harry S. Truman Memorial Veterans' Hospital | 5520 | 7019 | 2538 | 1681 |
| 539 | 3891 | Fannie and John Hertz Foundation | 4386 | 1727 | 2538 | 3879 |
| 540 | 3884 | MRI Global (Midwest Research Institute) | 6748 | 3335 | 1809 | 3879 |
| 541 | 3880 | Catholic Health Initiatives | 2917 | 1812 | 2538 | 3879 |
| 542 | 3876 | Yale New Haven Health System | 1136 | 1931 | 2538 | 3879 |
| 543 | 3873 | Duke Clinical Research Institute | 3229 | 1775 | 2538 | 3879 |
| 544 | 3869 | Huntington Memorial Hospital | 3399 | 1751 | 2538 | 3879 |
| 545 | 3857 | Roger Williams Medical Center | 5115 | 3046 | 2538 | 3509 |
| 546 | 3854 | VA Western New York Healthcare System at Buffalo | 5612 | 6713 | 2538 | 1891 |
| 547 | 3838 | National Minority AIDS Council | 3934 | 1697 | 2538 | 3879 |
| 548 | 3830 | Potomac Institute for Policy Studies | 3185 | 1728 | 2538 | 3879 |
| 549 | 3813 | Deaconess Health System | 3193 | 1698 | 2538 | 3879 |
| 550 | 3811 | Foundation for Biomedical Research | 3640 | 1667 | 2538 | 3879 |
| 551 | 3807 | James S McDonnell Foundation | 4768 | 1596 | 2538 | 3879 |
| 552 | 3799 | International Society for Heart & Lung Transplantation | 3736 | 1641 | 2538 | 3879 |
| 553 | 3794 | VA Medical Center Oklahoma City | 6355 | 7017 | 2538 | 1545 |
| 554 | 3788 | Versiti (BloodCenter of Wisconsin) | 3570 | 1631 | 2538 | 3879 |
| 555 | 3782 | Rowland Institute at Harvard | 4338 | 6247 | 1457 | 3191 |
| 556 | 3782 | Southcentral Foundation | 2553 | 2552 | 2538 | 3660 |
| 557 | 3774 | National Center for Posttraumatic Stress Disorder | 3434 | 1626 | 2538 | 3879 |
| 558 | 3771 | Cooper Aerobics Cooper Clinic | 3529 | 1613 | 2538 | 3879 |
| 559 | 3766 | IBM Research | 6538 | 1438 | 2538 | 3879 |
| 560 | 3763 | Sun Health Research Institute | 5976 | 3191 | 2538 | 3410 |
| 561 | 3755 | Warren Clinic | 3114 | 1610 | 2538 | 3879 |
| 562 | 3742 | Hughston Clinic | 4235 | 1533 | 2538 | 3879 |
| 563 | 3724 | Children's Hospital of Michigan | 2870 | 1589 | 2538 | 3879 |
| 564 | 3722 | Food and Drug Law Institute | 4634 | 1489 | 2538 | 3879 |
| 565 | 3719 | National Initiative for Children's Healthcare Quality | 2903 | 1581 | 2538 | 3879 |
| 566 | 3716 | Carnegie Observatories | 2007 | 1623 | 2538 | 3879 |
| 567 | 3716 | Phoenix VA Health Care System | 6194 | 6269 | 2538 | 2039 |
| 568 | 3716 | Animal Medical Center | 3449 | 1555 | 2538 | 3879 |
| 569 | 3711 | Texas Oncology | 2881 | 1574 | 2538 | 3879 |
| 570 | 3708 | DoD Food Analysis and Diagnostics | 3653 | 1518 | 2538 | 3879 |
| 571 | 3704 | Smithsonian Science Education Center (National Science Resources Center) | 4752 | 1463 | 2538 | 3879 |
| 572 | 3701 | National Center for Manufacturing Sciences | 3698 | 1505 | 2538 | 3879 |
| 573 | 3699 | Lean Construction Institute | 3025 | 1549 | 2538 | 3879 |
| 574 | 3634 | Gas Technology Institute | 5524 | 1341 | 2538 | 3879 |
| 575 | 3631 | Dorn VA Medical Center | 6555 | 6367 | 2538 | 1856 |
| 576 | 3631 | Feinstein Institute for Medical Research | 4082 | 1402 | 2538 | 3879 |
| 577 | 3631 | Genesis Heart Institute Davenport | 2471 | 1484 | 2538 | 3879 |
| 578 | 3622 | Whitman Walker Clinic | 1999 | 1497 | 2538 | 3879 |
| 579 | 3613 | Center for Behavioral Health | 3346 | 1430 | 2538 | 3879 |
| 580 | 3589 | Southwest Oncology Group | 2734 | 2175 | 2538 | 3660 |
| 581 | 3578 | Canada France Hawaii Telescope Corporation | 1535 | 1472 | 2538 | 3879 |
| 582 | 3574 | Neuropsychiatric Research Institute | 7285 | 6104 | 2538 | 1920 |
| 583 | 3573 | VA Medical Center Bedford Massachusetts | 6926 | 7024 | 2538 | 1246 |
| 584 | 3562 | Prince William Sound Science Center | 2923 | 3706 | 2063 | 3660 |
| 585 | 3545 | Rockefeller University Hospital | 5960 | 2797 | 2538 | 3410 |
| 586 | 3538 | John D. Dingell VA Medical Center Detroit Michigan | 6983 | 6212 | 2538 | 1843 |
| 587 | 3538 | Kansas Health Institute | 2310 | 1383 | 2538 | 3879 |
| 588 | 3528 | Mount Auburn Hospital | 4122 | 1988 | 2538 | 3660 |
| 589 | 3520 | Savannah River Site | 2008 | 1371 | 2538 | 3879 |
| 590 | 3520 | Gladstone Institute | 3161 | 1312 | 2538 | 3879 |
| 591 | 3483 | Biosphere 2 Center | 6317 | 1132 | 2538 | 3879 |
| 592 | 3474 | National Telecommunications and Information Administration | 735 | 1404 | 2538 | 3879 |
| 593 | 3469 | Boston Shriners Hospital | 8011 | 813 | 2538 | 3879 |
| 594 | 3466 | NASA Infrared Telescope Facility | 2004 | 1299 | 2538 | 3879 |
| 595 | 3443 | National Resource Center for Health Information Technology | 1689 | 1285 | 2538 | 3879 |
| 596 | 3438 | Louisville VA Medical Center | 6442 | 6006 | 2538 | 1891 |
| 597 | 3431 | Pacific Whale Foundation | 4671 | 1152 | 2538 | 3879 |
| 598 | 3429 | Cox Health | 2939 | 1221 | 2538 | 3879 |
| 599 | 3422 | Baptist Hospital | 1724 | 1254 | 2538 | 3879 |
| 600 | 3417 | American Institute of Baking | 2526 | 1223 | 2538 | 3879 |
