Exhibit 31.3
Certification of Principal Executive Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
I, Wilfred E. Jaeger, certify that:
| 1. | I have reviewed this Amendment No. 1 to the Annual Report on Form10-K/A of Threshold Pharmaceuticals, 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: April 28, 2017
/s/ WILFRED E. JAEGER, M.D. |
| Wilfred E. Jaeger, M.D. |
| Interim Chief Executive Officer |
| (Principal Executive Officer) |
