Jonathan S. Leff

Director, Viracta Therapeutics, Inc.

Companies

Tessera Defense & Homeland Security Inc.Board member Mar 21, 2024 to now¹
Zafgen (United States)Board member Jun 5, 2020 to now²
Silverback TherapeuticsBoard member Nov 10, 2022 to Nov 10, 2022³
Proteon TherapeuticsBoard member Aug 4, 2017 to Jun 12, 2018⁴
Alpine Immune SciencesBoard member Jun 16, 2015 to Sep 15, 2015⁵
Viracta Therapeutics, Inc.Board member Mar 22, 2006 to Jun 5, 2008⁶

Sources

The numbers on this page point here. Each one links to the record it came from.

1
SEC EDGARTessera Defense & Homeland Security Inc., Board member
2
SEC EDGARZafgen (United States), Board member
3
SEC EDGARSilverback Therapeutics, Board member
4
SEC EDGARProteon Therapeutics, Board member
5
SEC EDGARAlpine Immune Sciences, Board member
6
SEC EDGARViracta Therapeutics, Inc., Board member