| PR |
| Name | Number of records |
| Practising Law Institute | 6096 |
| Practitioner's Publishing Company | 955 |
| Practitioners Publishing Company, Inc. | 106 |
| Praeger Publishers | 1126 |
| PraiseGathering Music | 186 |
| Praise Hymn, Inc. | 693 |
| Prentice Hall | 767 |
| Prentice-Hall | 205 |
| Prentice Hall, Inc. | 2390 |
| Prentice-Hall, Inc. | 18944 |
| Prentice-Hall, Inc. Appleton-Century-Crofts | 338 |
| Prentice Hall Law & Business | 652 |
| Prentice-Hall Media, Inc. | 355 |
| Prentice Hall PTR | 334 |
| President and Fellows of Harvard College | 249 |
| Prestige Music | 781 |
| Prestige Records | 156 |
| Price Stern Sloan, Inc. | 416 |
| Price/Stern/Sloan Publishers, Inc. | 210 |
| Prima Publishing | 869 |
| Prime Time Music | 146 |
| PRI Music, Inc. | 881 |
| Prince | 349 |
| Princeton Review Publishing, LLC | 342 |
| Princeton University Press | 4702 |
| Princeton University Press. | 1595 |
| PRI Songs, Inc. | 723 |
| Pritchett & Hull Associates, Inc. | 569 |
| Prodigy | 138 |
| Pro-Ed | 184 |
| Pro-Ed, Inc. | 478 |
| PRO-ED, Inc. | 279 |
| Professional Education Systems, Inc. | 438 |
| Progressive Casualty Insurance Company | 1244 |
| Promotora Hispano Americana de Musica, S.A. | 1372 |
| Promotora Hispano Americana de Musica, SA. | 657 |
| Promotora Hispano Americana De Musica, S.A. | 196 |
| Prudent Publishing Company | 225 |
| Prudent Publishing Company, Inc. | 1855 |
| Pryor Resources, Inc. | 262 |
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