EXHIBIT 10.28 ONYX PHARMACEUTICALS, INC. STOCK PURCHASE AGREEMENTStock Purchase Agreement • March 1st, 2000 • Onyx Pharmaceuticals Inc • Biological products, (no disgnostic substances) • Delaware
Contract Type FiledMarch 1st, 2000 Company Industry Jurisdiction
BETWEENCollaboration Agreement • March 1st, 2000 • Onyx Pharmaceuticals Inc • Biological products, (no disgnostic substances) • New York
Contract Type FiledMarch 1st, 2000 Company Industry Jurisdiction
ANDStock Put and Purchase Agreement • March 1st, 2000 • Onyx Pharmaceuticals Inc • Biological products, (no disgnostic substances) • New York
Contract Type FiledMarch 1st, 2000 Company Industry Jurisdiction