| 601 | 3884 | MRI Global (Midwest Research Institute) |  | 6748 | 3335 | 1809 | 3879 |
| 602 | 5171 | Materials Research Science & Engineering Centers | | 4140 | 3658 | 2538 | 3879 |
| 603 | 4361 | NASA Marshall Space Flight Center | | 598 | 2810 | 2538 | 3879 |
| 604 | 5418 | Marine Spill Response Corporation | | 6260 | 3840 | 2538 | 3879 |
| 605 | 2596 | Mathematical Sciences Research Institute | | 610 | 523 | 2538 | 3879 |
| 606 | 4488 | Gallatin National Forest Avalanche Center | | 2072 | 2835 | 2538 | 3879 |
| 607 | 7225 | Museo de Antropologia |  | 6417 | 6671 | 2538 | 3879 |
| 608 | 2825 | US National Agricultural Library | | 60 | 863 | 2538 | 3879 |
| 609 | 3330 | National Rehabilitation Hospital Research Center | | 1899 | 1134 | 2538 | 3879 |
| 610 | 1453 | National Academies | | 693 | 176 | 1641 | 3879 |
| 611 | 5059 | NASA Advanced Supercomputing Division | | 2328 | 3642 | 2538 | 3879 |
| 612 | 3200 | National Academy for State Health Policy | | 2614 | 944 | 2538 | 3879 |
| 613 | 6801 | Nashville Hip Institute | | 7191 | 5881 | 2538 | 3879 |
| 614 | 7503 | Nashville Neuroscience Group | | 7785 | 6958 | 2538 | 3879 |
| 615 | 3207 | National Academy of Social Insurance | | 3056 | 932 | 2538 | 3879 |
| 616 | 5516 | Native American Cancer Research | | 5048 | 4129 | 2538 | 3879 |
| 617 | 3116 | National Center for Ecological Analysis and Synthesis | | 1484 | 2718 | 1102 | 3879 |
| 618 | 4269 | National Center for Education in Maternal and Child Health | | 3870 | 2358 | 2538 | 3879 |
| 619 | 3701 | National Center for Manufacturing Sciences | | 3698 | 1505 | 2538 | 3879 |
| 620 | 7744 | National Center for Rehabilitative Auditory Research | | 6485 | 7558 | 2538 | 3879 |
| 621 | 5119 | Usfs North Central Research Station | | 3486 | 3640 | 2538 | 3879 |
| 622 | 3985 | National Center for Voice and Speech | | 4532 | 1854 | 2538 | 3879 |
| 623 | 6261 | Nebraska Orthopaedic and Sports Medicine | | 6910 | 5049 | 2538 | 3879 |
| 624 | 6955 | Nebraska Spine + Pain Center | | 7553 | 6083 | 2538 | 3879 |
| 625 | 2526 | Nuclear Energy Institute | | 3812 | 371 | 2538 | 3879 |
| 626 | 3906 | Northeast Midwest Institute | | 5943 | 1653 | 2538 | 3879 |
| 627 | 2792 | National Energy Research Scientific Computing Center | | 1069 | 649 | 2538 | 3879 |
| 628 | 5909 | NeuroDevelopment Center | | 7133 | 4493 | 2538 | 3879 |
| 629 | 7588 | VA New England Healthcare System | | 6389 | 7286 | 2538 | 3879 |
| 630 | 6307 | Maine Center for Cancer Medicine and Blood Disorders | | 7061 | 5101 | 2538 | 3879 |
| 631 | 2318 | National Geospatial-Intelligence Agency (Defense Mapping Agency) | | 1259 | 301 | 2538 | 3879 |
| 632 | 6504 | New Hampshire Musculoskeletal Institute | | 6299 | 5485 | 2538 | 3879 |
| 633 | 3719 | National Initiative for Children's Healthcare Quality | | 2903 | 1581 | 2538 | 3879 |
| 634 | 1689 | National Institute of Food and Agriculture (Cooperative State Research Education and Extension Service) | | 721 | 412 | 1247 | 3879 |
| 635 | 4996 | National Center on Minority Health and Health Disparities | | 4514 | 3393 | 2538 | 3879 |
| 636 | 6557 | New Iberia Research Center | | 7733 | 5352 | 2538 | 3879 |
| 637 | 4389 | National Institute of Statistical Sciences | | 3730 | 2538 | 2538 | 3879 |
| 638 | 7629 | New Jersey Equine Clinic | | 7740 | 7226 | 2538 | 3879 |
| 639 | 1493 | Northwestern Medicine (Northwestern Memorial Hospital) | | 573 | 370 | 442 | 3879 |
| 640 | 3838 | National Minority AIDS Council | | 3934 | 1697 | 2538 | 3879 |
| 641 | 7279 | US Naval Observatory Flagstaff Station | | 7570 | 6630 | 2538 | 3879 |
| 642 | 1536 | NORC University of Chicago | | 1581 | 290 | 1070 | 3879 |
| 643 | 7171 | Centro Cientifico Tecnologico CONICET Nordeste | | 5062 | 6673 | 2538 | 3879 |
| 644 | 7829 | Northern California Research Corporation | | 7553 | 7613 | 2538 | 3879 |
| 645 | 7265 | VA Northern Indiana Health Care System | | 6869 | 6706 | 2538 | 3879 |
| 646 | 6523 | Northwest Orthopaedic Institute | | 7255 | 5413 | 2538 | 3879 |
| 647 | 4275 | Norwalk Hospital | | 4350 | 2325 | 2538 | 3879 |
| 648 | 7133 | Norwood Clinic | | 7767 | 6303 | 2538 | 3879 |
| 649 | 7563 | Phoenix Heart Center | | 8091 | 6807 | 2538 | 3879 |
| 650 | 6023 | National Perinatal Information Center | | 6580 | 4721 | 2538 | 3879 |
| 651 | 1223 | National Radio Astronomy Observatory | | 243 | 153 | 510 | 3879 |
| 652 | 6304 | Olin Neuropsychiatry Research Center | | 7137 | 5079 | 2538 | 3879 |
| 653 | 3222 | National Research Council Canada |  | 4029 | 923 | 2538 | 3879 |
| 654 | 6960 | Northern Rockies Conservation Cooperative | | 8011 | 5721 | 2538 | 3879 |
| 655 | 4275 | National Research Corporation | | 4805 | 2291 | 2538 | 3879 |
| 656 | 3347 | USDA Forest Service Northern Research Station | | 505 | 1252 | 2538 | 3879 |
| 657 | 7292 | National Surgery Adjuvant Breast Bowel Project | | 6302 | 6813 | 2538 | 3879 |
| 658 | 2473 | Natural Sciences and Engineering Research Council of Canada | | 556 | 431 | 2538 | 3879 |
| 659 | 4149 | North-South Institute | | 4166 | 2109 | 2538 | 3879 |
| 660 | 3068 | National Tropical Botanical Garden | | 3600 | 786 | 2538 | 3879 |
| 661 | 3474 | National Telecommunications and Information Administration | | 735 | 1404 | 2538 | 3879 |
| 662 | 5031 | RIT National Technical Institute for the Deaf | | 2379 | 3612 | 2538 | 3879 |
| 663 | 2468 | National Technical Information Service | | 1267 | 386 | 2538 | 3879 |
| 664 | 5085 | Instituto de Ciencias Nucleares de la UNAM |  | 2144 | 6505 | 383 | 3879 |
| 665 | 6021 | USGS National Wildlife Health Center | | 6156 | 4769 | 2538 | 3879 |
| 666 | 4099 | Northwest Hospital & Medical Center | | 4022 | 2064 | 2538 | 3879 |
| 667 | 2406 | New York Blood Center | | 5460 | 1151 | 1249 | 3879 |
| 668 | 5182 | New York Headache Center | | 5025 | 3610 | 2538 | 3879 |
| 669 | 4734 | Oklahoma Blood Institute | | 6351 | 2880 | 2538 | 3879 |
| 670 | 3716 | Carnegie Observatories | | 2007 | 1623 | 2538 | 3879 |
| 671 | 7186 | Ocala Heart and Vascular Institute | | 7553 | 6471 | 2538 | 3879 |
| 672 | 5188 | Oceanic Institute | | 7271 | 3367 | 2538 | 3879 |
| 673 | 4142 | Oregon College of Oriental Medicine | | 4017 | 2300 | 2521 | 3879 |
| 674 | 7235 | Orlando Clinical Research Center | | 7368 | 6589 | 2538 | 3879 |
| 675 | 4937 | Observatorio Colombiano de Ciencia y Tecnología |  | 3600 | 4173 | 2469 | 3879 |
| 676 | 4937 | Ogden Clinic | | 5040 | 3284 | 2538 | 3879 |
| 677 | 6476 | Hipple Cancer Research Center | | 6230 | 5458 | 2538 | 3879 |
| 678 | 3110 | Oregon Institute of Science and Medicine | | 6107 | 741 | 2538 | 3879 |
| 679 | 6760 | VA Office of Information & Technology | | 633 | 6338 | 2538 | 3879 |
| 680 | 5111 | Omega-3 Research Institute | | 7945 | 2904 | 2538 | 3879 |
| 681 | 6643 | National Pediatric Myoclonus Center | | 7532 | 5567 | 2538 | 3879 |
| 682 | 5711 | OncoSalud |  | 5830 | 4349 | 2538 | 3879 |
| 683 | 6790 | Ontar Corporation | | 7725 | 5743 | 2538 | 3879 |
| 684 | 7624 | Ontario Hydro Energy | | 8091 | 6958 | 2538 | 3879 |
| 685 | 6095 | Outcomes Research Institute | | 4719 | 5011 | 2538 | 3879 |
| 686 | 4545 | Ontario Research Center for Computer Algebra | | 5048 | 2688 | 2538 | 3879 |
| 687 | 4351 | Oregon Clinic | | 4304 | 2446 | 2538 | 3879 |
| 688 | 6930 | Orentreich Foundation for Advancement of Science | | 6922 | 6151 | 2538 | 3879 |
| 689 | 4297 | Centro Agronómico Tropical de Investigación y Enseñanza SIDALC |  | 1034 | 2627 | 2538 | 3879 |
| 690 | 7122 | Orthopaedic Research of Virginia | | 5884 | 6526 | 2538 | 3879 |
| 691 | 3295 | Ohio Supercomputer Center | | 2823 | 1052 | 2538 | 3879 |
| 692 | 7188 | Observatorio San Calixto |  | 6092 | 6636 | 2538 | 3879 |
| 693 | 2524 | OSF Saint Francis Medical Center | | 894 | 954 | 2258 | 3879 |
| 694 | 4319 | Osiris Therapeutics | | 3743 | 2436 | 2538 | 3879 |
| 695 | 5776 | Oklahoma State University Medical Center | | 6695 | 4355 | 2538 | 3879 |
| 696 | 3431 | Pacific Whale Foundation | | 4671 | 1152 | 2538 | 3879 |
| 697 | 2614 | Pacific Institute for Studies in Development Environment and Security | | 2749 | 458 | 2538 | 3879 |
| 698 | 3002 | David and Lucile Packard Foundation | | 2535 | 773 | 2538 | 3879 |
| 699 | 6227 | University of Washington College of Forest Resources | | 7396 | 4910 | 2538 | 3879 |
| 700 | 4042 | Pankey Institute | | 4658 | 1933 | 2538 | 3879 |
