Attached files
Exhibit 31.3
CERTIFICATIONS
I, Clay B. Siegall, certify that:
1. | I have reviewed this Amendment No. 1 to Annual Report on Form 10-K/A of Seattle Genetics, Inc.; and |
2. | Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report. |
Date: November 26, 2010
/S/ CLAY B. SIEGALL |
Clay B. Siegall |
Chief Executive Officer |