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Not only have individual companies grown over the last 10 years, the number of U.S. biotech firms has continued to climb, approaching 1,500 in 2001.

Source: Ernst & Young
| Underlying Data |
| Year | Companies |
| 1992 | 1231 |
| 1993 | 1272 |
| 1994 | 1311 |
| 1995 | 1308 |
| 1996 | 1287 |
| 1997 | 1274 |
| 1998 | 1311 |
| 1999 | 1273 |
| 2000 | 1379 |
| 2001 | 1457 |

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