Palvella Therapeutics 

Pieris Pharmaceuticals, Inc., a biotechnology company, discovers and develops biotechnological applications. The company focuses on the development of its 4-1BB bispecifics immuno-oncology (IO) programs. Its clinical pipeline consists of IO bispecifics, including S095012 (PRS-344), a bispecific Mabcalin compound targeting PD-L1 and 4-1BB in partnership with Les Laboratoires Servier and Institut de Recherches Internationales Servier; SGN-BB228 (PRS-346), a CD228 x 4-1BB bispecific antibody-Anticalin compound targeting CD228 and 4-1BB in partnership with Pfizer Inc.; and BOS-342 (PRS-342), a GPC3 x 4-1BB bispecific Mabcalin compound targeting GPC3 and 4-1BB in partnership with Boston Pharmaceuticals, which are in phase 1 studies. The company was founded in 2001 and is headquartered in Boston, Massachusetts.