| Harper | — | 1817 |
| Harper Perennial | — | 1964 |
| HarperCollins | — | 1817 |
| Harvard Business Publishing | — | 1994 |
| Harvard University Press | — | 1913 |
| Harvill Secker | — | 1936 |
| Heinemann | — | 1890 |
| Henry Holt and Company | — | 1866 |
| Hetzel éds | — | 1837 |
| Hodder & Stoughton | — | 1868 |
| Hogarth Press | — | 1917 |
| Houghton Mifflin Harcourt | — | 1880 |
| Hutchinson | — | 1887 |
| Ignác Leopold Kober | — | 1846 |
| Império Austríaco | — | 1804 |
| Independent Publishing House NOWA | — | — |
| Institute of the Italian Encyclopaedia | — | 1925 |
| Instituto Marx-Engels-Lenin | — | 1919 |
| Instituto Naval dos Estados Unidos | — | 1873 |
| İletişim Yayınları | — | 1980 |
| J. B. Lippincott & Co. | — | 1836 |
| J.B. Metzler | — | 1682 |
| Jarrold | — | 1770 |
| John McLean & Company | — | 1784 |
| John Murray | — | 1768 |
| Jonathan Cape | — | 1921 |
| Kiepenheuer & Witsch | — | 1951 |
| Kinneret Zmora-Bitan Dvir | — | 1919 |
| Kodansha | — | 1909 |
| L. C. Page & Company | — | — |
| Land and Factory | — | 1922 |
| Le Petit Vingtième | — | 1928 |
| Les Éditions de Minuit | — | 1941 |
| Linz | — | — |
| Lippincott's Monthly Magazine | — | 1868 |
| Little, Brown and Company | — | 1837 |
| Livraria Editora Vaticana | — | 1926 |
| Longman | — | 1724 |
| Macmillan Inc. | — | 1896 |
| Macmillan Publishers | — | 1843 |
| McClelland & Stewart | — | 1906 |
| Methuen Publishing | — | 1889 |
| Miramax Books | — | 1979 |
| Neale Publishing Company | — | 1901 |
| New American Library | — | 1948 |
| New Directions Publishing | — | 1936 |
| Norma Editorial | — | 1977 |
| Norstedts | — | 1823 |