| 3M | founded 1902 | Institution | |
| 7th Regiment, New York National Guard | | Institution | |
| 82 Club | 1953 – ca. 1985 | Institution | |
| A. Abraham | British, founded 1817 | Institution | |
| A. Alberani Vecchiotti | | Institution | |
| A. A. Vantine & Co. | 1875 - 1951 | Institution | |
| A. A. Webster & Co. | active ca. 1886 - 1904 | Institution | |
| Abacrome Inc. | | Institution | |
| Catherine M. Abate | American, 1947 – 2014 | Individual | |
| Joshua Grosvenor Abbe | | Individual | |
| Maurice Abbey | | Individual | |
| Berenice Abbott | American, 1898 - 1991 | Individual | |
| Abbott Laboratories | American, founded 1888 | Institution | |
| Abbott & Lawrence | American, 1851 – 1915 | Institution | |
| William M. Abbott | | Individual | |
| Joseph Abboud | American, b. 1950 | Individual | |
| A. B. & C. Durand Wright & Co | | Institution | |
| Abco. | | Institution | |
| A. B. Dick Company | | Institution | |
| William Abdy I | active ca. 1763-1784 | Individual | |
| Catherine Strobel Abeel | 1818 – 1890 | Individual | |
| David Abeel | 1763 - 1840 | Individual | |
| Garret Abeel | 1734 - 1799 | Individual | |
| Garret Byvanck Abeel | 1768 – 1829 | Individual | |
| John Howard Abeel | 1815 - 1896 | Individual | |
| Mary Ann Abeel | American, 1790 – 1864 | Individual | |
| Mary Byvanck Abeel | 1742 – 1795 | Individual | |
| Albert Abendschein | 1859-1914 | Individual | |
| Abercrombie & Fitch | founded 1892 | Institution | |
| A. B. Griswold & Co. | 1865 - 1924 | Institution | |
| Abraham & Straus | 1865 - 1994 | Institution | |
| Morris Berthold Abram | 1918 - 2000 | Individual | |
| Albert Abramovitz | American, born Russia, 1879 – 1963 | Individual | |
| David Abramowicz | | Individual | |
| Abrams Paper Weight Co. | ca. mid -1890s - ca. 1910s | Institution | |
| Robert Abrams | born 1938 | Individual | |
