| 301 | 1940 | Smith Kettlewell Eye Research Institute | 4328 | 1791 | 1930 | 3140 |
| 302 | 25 | Sloan Kettering Memorial Cancer Center | 368 | 107 | 6 | 26 |
| 303 | 6660 | Sioux Falls VA Medical Center | 6479 | 6910 | 2538 | 3509 |
| 304 | 6077 | Silverstein Institute Ear Research Foundation | 6456 | 4820 | 2538 | 3879 |
| 305 | 7634 | Sheridan VA Medical Center | 7374 | 7301 | 2538 | 3879 |
| 306 | 6497 | Shea Ear Clinic | 6661 | 5445 | 2538 | 3879 |
| 307 | 1173 | Sharp Memorial Hospital Rehabilitation Center | 1316 | 547 | 2501 | 2266 |
| 308 | 244 | SETI Institute | 1615 | 161 | 946 | 861 |
| 309 | 5955 | Semmes-Murphy Neurologic and Spine Institute | 6676 | 4611 | 2538 | 3879 |
| 310 | 7320 | Seattle Prostate Institute at Swedish Medical Center | 7380 | 6735 | 2538 | 3879 |
| 311 | 8001 | Seattle Epidemiologic Research and Information Center | 7634 | 7953 | 2538 | 3879 |
| 312 | 7422 | Seattle Allergy & Asthma Research Institute | 7864 | 6786 | 2538 | 3879 |
| 313 | 42 | Scripps Research Institute | 344 | 112 | 26 | 98 |
| 314 | 2177 | Scripps Institution of Oceanography | 856 | 243 | 2538 | 3879 |
| 315 | 633 | Scripps Health (Whittier Institute for Diabetes) | 1458 | 485 | 2538 | 625 |
| 316 | 152 | Schlumberger Doll Research Center | 415 | 133 | 233 | 667 |
| 317 | 3894 | SBH Health System | 2900 | 2963 | 2316 | 3879 |
| 318 | 3520 | Savannah River Site | 2008 | 1371 | 2538 | 3879 |
| 319 | 1478 | Savannah River National Laboratory | 6431 | 2706 | 1183 | 2104 |
| 320 | 4442 | Sansum Clinic | 3685 | 2630 | 2538 | 3879 |
| 321 | 2139 | Sanford Burnham Prebys Medical Discovery Institute (Sanford-Burnham Medical Research Institute) | 2598 | 1266 | 256 | 3879 |
| 322 | 50 | Sandia National Laboratories | 195 | 97 | 65 | 147 |
| 323 | 1871 | San Francisco VA Medical Center | 5123 | 5913 | 2538 | 259 |
| 324 | 1557 | San Francisco Estuary Institute | 2030 | 1786 | 1921 | 2653 |
| 325 | 1227 | San Diego Supercomputer Center | 338 | 148 | 601 | 3879 |
| 326 | 2808 | Samueli Institute | 5708 | 3271 | 2538 | 2653 |
| 327 | 643 | Samuel Roberts Noble Foundation | 1863 | 848 | 591 | 1581 |
| 328 | 111 | Salk Institute for Biological Studies | 420 | 194 | 40 | 351 |
| 329 | 5081 | Saint Vincent's Catholic Medical Centers | 7930 | 2891 | 2538 | 3879 |
| 330 | 4434 | Saint Vincent Hospital | 6218 | 3125 | 2469 | 3879 |
| 331 | 3277 | Saint Luke's Hospitals and Health Care in Idaho | 1484 | 1095 | 2538 | 3879 |
| 332 | 2963 | Saint Louis Children's Hospital | 2090 | 757 | 2538 | 3879 |
| 333 | 47 | Saint Jude Children's Research Hospital | 334 | 92 | 45 | 141 |
| 334 | 3905 | Saint Joseph's Hospital Health Center | 3899 | 1771 | 2538 | 3879 |
| 335 | 2934 | Saint Joseph Mercy Health System | 2224 | 2092 | 2254 | 3660 |
| 336 | 4281 | Saint John's Hospital Springfield | 5257 | 2256 | 2538 | 3879 |
| 337 | 1088 | RWJBarnabas Health | 1129 | 636 | 2004 | 2627 |
| 338 | 97 | Rush University Medical Center | 827 | 221 | 66 | 138 |
| 339 | 3782 | Rowland Institute at Harvard | 4338 | 6247 | 1457 | 3191 |
| 340 | 1585 | Rothman Orthopaedic Institute | 3213 | 3461 | 2538 | 808 |
| 341 | 194 | Roswell Park Cancer Institute | 1116 | 569 | 132 | 234 |
| 342 | 7751 | Roskamp Institute | 7954 | 7344 | 2538 | 3879 |
| 343 | 6221 | Romark Institute for Medical Research | 7300 | 4922 | 2538 | 3879 |
| 344 | 2971 | Rogosin Institute | 6501 | 4064 | 2538 | 2408 |
| 345 | 3857 | Roger Williams Medical Center | 5115 | 3046 | 2538 | 3509 |
| 346 | 5144 | Rocky Mountain Poison and Drug Center | 6836 | 3384 | 2538 | 3879 |
| 347 | 2194 | Rocky Mountain Institute | 2553 | 215 | 2538 | 3879 |
| 348 | 2251 | Rocky Mountain Biological Laboratory | 5459 | 2716 | 2538 | 2249 |
| 349 | 3545 | Rockefeller University Hospital | 5960 | 2797 | 2538 | 3410 |
| 350 | 2202 | Rockefeller Foundation | 3248 | 210 | 2538 | 3879 |
| 351 | 2132 | Robert Wood Johnson Medical School | 1615 | 1287 | 271 | 3879 |
| 352 | 911 | Robert Wood Johnson Foundation | 1484 | 129 | 2538 | 2460 |
| 353 | 7503 | Robert J. Dole VA Medical Center Wichita Kansas | 7041 | 7082 | 2538 | 3879 |
| 354 | 4555 | Robert Graham Center | 4304 | 2767 | 2538 | 3879 |
| 355 | 4920 | Riverview Medical Center | 5399 | 3232 | 2538 | 3879 |
| 356 | 4359 | Riverside Research Institute | 6103 | 4142 | 1903 | 3879 |
| 357 | 1093 | Riverside Methodist Hospital Ohiohealth | 2082 | 730 | 2478 | 1920 |
| 358 | 5031 | RIT National Technical Institute for the Deaf | 2379 | 3612 | 2538 | 3879 |
| 359 | 2627 | Richard L. Roudebush VA Medical Center Indianapolis Indiana | 6401 | 6172 | 2538 | 829 |
| 360 | 7863 | Rhode Island Spine Center Clinical Reasoning in Spine Pain | 7899 | 7578 | 2538 | 3879 |
| 361 | 4185 | Rhode Island Department of Environmental Management | 1418 | 2397 | 2538 | 3879 |
| 362 | 6672 | Retina Research Foundation | 7159 | 5694 | 2538 | 3879 |
| 363 | 2696 | Retina Foundation of the Southwest | 6735 | 4215 | 2538 | 2027 |
| 364 | 747 | Research Triangle Institute | 721 | 268 | 171 | 3076 |
| 365 | 2770 | Research Institute for Fragrance Materials | 5948 | 3452 | 2489 | 2782 |
| 366 | 8072 | Research and Development Iowa City VA Medical Center | 7455 | 8071 | 2538 | 3879 |
| 367 | 6256 | Reproductive Genetics Institute | 7864 | 4731 | 2538 | 3879 |
| 368 | 3300 | Renal Research Institute | 6688 | 4593 | 2538 | 2487 |
| 369 | 6202 | Rehabilitation Research and Development Service | 1458 | 5430 | 2538 | 3879 |
| 370 | 762 | Rehabilitation Institute of Chicago | 5794 | 1138 | 1895 | 909 |
| 371 | 835 | Regenstrief Institute | 4634 | 1621 | 1270 | 1074 |
| 372 | 418 | Regeneron Pharmaceuticals Inc | 2640 | 739 | 355 | 850 |
| 373 | 5650 | Rapid City Medical Center | 5831 | 4231 | 2538 | 3879 |
| 374 | 51 | Rand Corporation | 276 | 30 | 109 | 353 |
| 375 | 2301 | Ralph H. Johnson VA Medical Center | 5175 | 5799 | 2538 | 722 |
| 376 | 4516 | Raleigh Orthopaedic Clinic | 5959 | 4127 | 2538 | 3509 |
| 377 | 435 | Rady Childrens Hospital and Health Center San Diego | 1377 | 920 | 1188 | 507 |
| 378 | 6197 | Radiology Associates of Tallahassee | 7106 | 4931 | 2538 | 3879 |
| 379 | 1799 | Radiation Therapy Oncology Group | 3525 | 1818 | 2538 | 2104 |
| 380 | 4525 | Queen's Medical Center Honolulu Hawaii | 6809 | 2486 | 2538 | 3879 |
| 381 | 7536 | Quality Enhancement Research Initiative | 5460 | 7237 | 2538 | 3879 |
| 382 | 1268 | Public Health Institute | 3152 | 1112 | 2538 | 1508 |
| 383 | 1360 | Providence Saint John's Health Center | 42 | 246 | 947 | 3879 |
| 384 | 6332 | Providence Medical Group (South Carolina Heart Center) | 6832 | 5185 | 2538 | 3879 |
| 385 | 7697 | Proteogenomics Research Institute for Systems Medicine | 7904 | 7270 | 2538 | 3879 |
| 386 | 7076 | Prosthetics Research Study | 7389 | 6307 | 2538 | 3879 |
| 387 | 6981 | Prosthetics and Sensory Aids Service | 7030 | 6230 | 2538 | 3879 |
| 388 | 3046 | Property and Environment Research Center | 3062 | 790 | 2538 | 3879 |
| 389 | 331 | Princeton Plasma Physics Laboratory | 815 | 504 | 286 | 841 |
| 390 | 3562 | Prince William Sound Science Center | 2923 | 3706 | 2063 | 3660 |
| 391 | 3314 | Prevention Research Center | 6180 | 3868 | 2538 | 2867 |
| 392 | 6888 | Presbyterian Ear Institute | 7617 | 5950 | 2538 | 3879 |
| 393 | 6346 | Premier Bone & Joint Centers (Gem City Bone and Joint Clinic) | 5964 | 5281 | 2538 | 3879 |
| 394 | 4161 | Powder Coating Institute | 5175 | 2067 | 2538 | 3879 |
| 395 | 3830 | Potomac Institute for Policy Studies | 3185 | 1728 | 2538 | 3879 |
| 396 | 6447 | Postgraduate Center for Mental Health | 7580 | 5230 | 2538 | 3879 |
| 397 | 545 | Population Council | 2064 | 518 | 1201 | 1490 |
| 398 | 2669 | Point Blue (Point Reyes Bird Observatory) | 3605 | 1544 | 1434 | 3879 |
| 399 | 6459 | Plasma Proteome Institute | 6651 | 6197 | 2538 | 3660 |
| 400 | 6050 | Plano Orthopedic and Sports Medicine Center | 5859 | 4843 | 2538 | 3879 |
