| 2401 | 3840 | NWO Institutes Organisation NWO-I |  | 3277 | 1735 | 2538 | 3879 |
| 2402 | 5382 | Oberlinhaus |  | 4350 | 3979 | 2538 | 3879 |
| 2403 | 362 | Observatoire de la Côte d'Azur |  | 1259 | 828 | 478 | 523 |
| 2404 | 99 | Observatoire de Paris | | 383 | 158 | 266 | 166 |
| 2405 | 1883 | Observatoire Océanologique de Banyuls-sur-Mer | | 1449 | 2018 | 889 | 3316 |
| 2406 | 5516 | Observatorio Astronómico de Mallorca |  | 8091 | 3236 | 2538 | 3879 |
| 2407 | 5629 | Observatorio de Prospectiva Tecnológica Industrial | | 6556 | 4143 | 2538 | 3879 |
| 2408 | 7571 | Observatorio Tecnológico Textil-Confección | | 7318 | 7176 | 2538 | 3879 |
| 2409 | 741 | Odense University Hospital |  | 1301 | 1654 | 2538 | 166 |
| 2410 | 347 | Office National d'Etudes et de Recherches Aérospatiales ONERA | | 912 | 789 | 313 | 587 |
| 2411 | 5238 | Office National d'Etudes et de Recherches Aérospatiales ONERA Toulouse | | 8091 | 2861 | 2538 | 3879 |
| 2412 | 2011 | Office National de la Chasse et de la Faune Sauvage | | 1885 | 971 | 1781 | 3660 |
| 2413 | 2430 | Oficina Española de Patentes y Marcas | | 86 | 481 | 2538 | 3879 |
| 2414 | 4011 | Oil and Gas Institute in Cracow |  | 2103 | 3522 | 2132 | 3879 |
| 2415 | 5985 | Ökumenisches Hainich Klinikum | | 5520 | 4762 | 2538 | 3879 |
| 2416 | 5523 | Old Church Slavonic Institute |  | 5230 | 5547 | 2501 | 3660 |
| 2417 | 1248 | Oldenburger Forschungs- und Entwicklungsinstitut für Informatik-Werkzeuge und -Systeme | | 2227 | 1204 | 1231 | 2627 |
| 2418 | 2453 | Onassis Cardiac Surgery Center |  | 5736 | 3767 | 2538 | 1992 |
| 2419 | 6771 | Onkologischer Schwerpunkt Stuttgart | | 7086 | 5838 | 2538 | 3879 |
| 2420 | 939 | Onze Lieve Vrouw Hospital | | 2588 | 1519 | 1403 | 1545 |
| 2421 | 1739 | Organización Nacional de Trasplantes | | 1801 | 1097 | 2538 | 2653 |
| 2422 | 6149 | Orient Institute | | 6872 | 4884 | 2538 | 3879 |
| 2423 | 7437 | Oriental Institute ASCR |  | 3092 | 7185 | 2538 | 3879 |
| 2424 | 6686 | Orthopädische Klinik Volmarstein | | 6360 | 5801 | 2538 | 3879 |
| 2425 | 3553 | Orthopedic Institute Gaetano Pini |  | 2710 | 4895 | 2521 | 2867 |
| 2426 | 4195 | Ospedale di Circolo Fondazione Macchi | | 4870 | 6471 | 2538 | 2377 |
| 2427 | 8130 | Ospedale Giovanni Fornaroli | | 8091 | 8125 | 2538 | 3879 |
| 2428 | 6255 | Ospedale Gradenigo | | 4961 | 5240 | 2538 | 3879 |
| 2429 | 405 | Ospedale Maggiore Policlinico Milano | | 1330 | 1924 | 506 | 176 |
| 2430 | 494 | Ospedale Niguarda | | 786 | 1770 | 333 | 458 |
| 2431 | 613 | Ospedale Pediatrico Gaslini | | 3303 | 2372 | 209 | 519 |
| 2432 | 206 | Ospedale San Raffaele (Istituto Scientifico Universitario) | | 2280 | 1166 | 37 | 116 |
| 2433 | 4346 | Osservatorio Astrofisico di Arcetri | | 2178 | 5256 | 869 | 3879 |
| 2434 | 7536 | Osservatorio Astrofisico di Catania | | 4688 | 7266 | 2538 | 3879 |
| 2435 | 6350 | Osservatorio Astronomico di Bologna | | 2636 | 5535 | 2538 | 3879 |
| 2436 | 2594 | Osservatorio Astronomico di Capodimonte | | 4011 | 7225 | 1922 | 1001 |
| 2437 | 4542 | Osservatorio Astronomico di Torino | | 5160 | 6668 | 2538 | 2510 |
| 2438 | 7295 | Osservatorio Astronomico di Trieste | | 2084 | 7042 | 2538 | 3879 |
| 2439 | 2556 | Osservatorio Astronomico Roma | | 4692 | 6688 | 2538 | 543 |
| 2440 | 5503 | Ost-West Wissenschaftszentrum | | 5040 | 4111 | 2538 | 3879 |
| 2441 | 61 | Osterreichische Akademie der Wissenschaften |  | 35 | 181 | 120 | 125 |
| 2442 | 4404 | Osterreichische Forschungsstiftung für Entwicklungshilfe | | 3175 | 2591 | 2538 | 3879 |
| 2443 | 5372 | Osterreichische Institut für Internationale Politik | | 2406 | 4144 | 2538 | 3879 |
| 2444 | 5094 | Österreichisches Institut für Menschenrechte | | 3319 | 3634 | 2538 | 3879 |
| 2445 | 976 | Osterreichisches Institut für Wirtschaftsforschung | | 1055 | 1123 | 1250 | 2124 |
| 2446 | 6553 | Otto- Fricke- Krankenhaus | | 6508 | 5565 | 2538 | 3879 |
| 2447 | 1702 | Our Lady's Children's Hospital |  | 5040 | 3338 | 2538 | 990 |
| 2448 | 776 | Overseas Development Institute |  | 721 | 222 | 1057 | 2919 |
| 2449 | 5491 | Oxford Centre for Hebrew and Jewish Studies | | 4996 | 4097 | 2538 | 3879 |
| 2450 | 4275 | Oxford Centre for Islamic Studies | | 4468 | 2317 | 2538 | 3879 |
| 2451 | 3711 | Oxford Health | | 2068 | 1611 | 2538 | 3879 |
| 2452 | 2471 | Oxford Institute for Energy Studies | | 2642 | 860 | 2203 | 3879 |
| 2453 | 181 | Oxford University Hospitals NHS Trust | | 1703 | 822 | 568 | 82 |
| 2454 | 3186 | Palais de la Découverte | | 4787 | 864 | 2538 | 3879 |
| 2455 | 4900 | Papiertechnische Stiftung | | 4431 | 3285 | 2538 | 3879 |
| 2456 | 784 | Parc de Salut Mar (Institut Municipal d'Assistencia Sanitaria) | | 663 | 1832 | 954 | 1015 |
| 2457 | 6991 | Park-Klinik Kiel | | 7028 | 6234 | 2538 | 3879 |
| 2458 | 6645 | Parkinson-Klinik Wolfach | | 7222 | 5620 | 2538 | 3879 |
| 2459 | 1234 | Paul Drude Institut für Festkörperelektronik | | 2464 | 3478 | 720 | 1366 |
| 2460 | 971 | Paul Ehrlich Institut | | 1275 | 736 | 2538 | 1256 |
| 2461 | 4103 | Paul Gerhardt Diakonie | | 2411 | 2180 | 2538 | 3879 |
| 2462 | 7100 | Peamount Hospital | | 6788 | 6412 | 2538 | 3879 |
| 2463 | 4787 | Pfalzklinikum | | 3386 | 3186 | 2538 | 3879 |
| 2464 | 5562 | Pfeiffersche Stiftungen Magdeburg-Cracau | | 4431 | 4221 | 2538 | 3879 |
| 2465 | 3599 | PHARMO Institute Utrecht | | 6107 | 4917 | 2538 | 2696 |
| 2466 | 236 | Physikalisch-Technische Bundesanstalt | | 436 | 361 | 628 | 480 |
| 2467 | 769 | Pirbright Institute (Institute for Animal Health) | | 2993 | 2081 | 1033 | 728 |
| 2468 | 2655 | Plant Breeding and Acclimatization Institute | | 1525 | 2847 | 1670 | 3509 |
| 2469 | 5325 | Plant Protection Institute HAS |  | 919 | 4208 | 2538 | 3879 |
| 2470 | 1165 | Plataforma Solar de Almeria | | 5311 | 1981 | 1706 | 1526 |
| 2471 | 518 | Plymouth Marine Laboratory | | 3041 | 1346 | 250 | 749 |
| 2472 | 4022 | Policy Studies Institute | | 3983 | 1958 | 2538 | 3879 |
| 2473 | 6350 | Poliklinika SUVAG | | 4532 | 5406 | 2538 | 3879 |
| 2474 | 58 | Polish Academy of Sciences | | 110 | 279 | 486 | 43 |
| 2475 | 8043 | Polish Academy of Sciences Institute of Ichthyobiology and Aquaculture in Gołysz | | 8011 | 7935 | 2538 | 3879 |
| 2476 | 8126 | Polish Academy of Sciences Scientific Center in Moscow / Polska Akademia Nauk Stacja Naukowa w Moskwie | | 7856 | 8129 | 2538 | 3879 |
| 2477 | 6318 | Polish Academy of Sciences Scientific Center in Paris / Polska Akademia Nauk Stacja Naukowa w Paryżu | | 5497 | 5278 | 2538 | 3879 |
| 2478 | 6149 | Polish Academy of Sciences Scientific Center in Vienna / Polska Akademia Nauk Stacja Naukowa w Wiedniu | | 5336 | 5050 | 2538 | 3879 |
| 2479 | 969 | Polish Geological Institute | | 256 | 919 | 1414 | 2377 |
| 2480 | 3283 | Polish Institute of International Affairs | | 2620 | 1036 | 2538 | 3879 |
| 2481 | 6875 | Polymer Institute Brno | | 7242 | 5990 | 2538 | 3879 |
| 2482 | 3845 | Polymer Institute Slovak Academy of Sciences |  | 5230 | 6643 | 2538 | 1950 |
| 2483 | 4381 | Poole Hospital NHS Trust | | 3312 | 2562 | 2538 | 3879 |
| 2484 | 158 | Potsdam Institut für Klimafolgenforschung | | 792 | 275 | 211 | 338 |
| 2485 | 5272 | Poznan Branch Polish Academy of Sciences / Polska Akademia Nauk Oddział w Poznaniu | | 4983 | 3730 | 2538 | 3879 |
| 2486 | 3863 | Proudman Oceanographic Laboratory | | 7564 | 1442 | 2538 | 3879 |
| 2487 | 1641 | Public Health Agency of Sweden / Folkhälsomyndigheten |  | 624 | 812 | 2202 | 3316 |
| 2488 | 3377 | Public Opinion Research Center | | 2658 | 1161 | 2538 | 3879 |
| 2489 | 7725 | Quantum and Nano Technology Group University of Oxford | | 7475 | 7448 | 2538 | 3879 |
| 2490 | 4795 | Queen Victoria Hospital | | 4172 | 3134 | 2538 | 3879 |
| 2491 | 950 | Quirónsalud Grupo Hospitalario | | 386 | 810 | 1738 | 2266 |
| 2492 | 93 | Radboud University Medical Center Nijmegen | | 565 | 594 | 43 | 46 |
| 2493 | 1696 | Radiation and Nuclear Safety Authority |  | 2535 | 1124 | 2538 | 2510 |
| 2494 | 1985 | Rathenau Institute | | 3942 | 1284 | 2538 | 2782 |
| 2495 | 3960 | Real Academia de Ciencias Exactas, Físicas y Naturales | | 2338 | 1964 | 2538 | 3879 |
| 2496 | 1679 | Real Academia Española | | 155 | 91 | 2538 | 3879 |
| 2497 | 3565 | Real Academia Gallega | | 205 | 1659 | 2538 | 3879 |
| 2498 | 2658 | Real Instituto Elcano de Estudios Internacionales y Estratégicos | | 834 | 557 | 2538 | 3879 |
| 2499 | 2000 | Real Jardín Botánico de Madrid | | 322 | 4943 | 674 | 2431 |
| 2500 | 5908 | Real Jardín Botánico Juan Carlos I Alcalá de Henares | | 6971 | 4507 | 2538 | 3879 |
