KalVista Pharmaceuticals, Inc. is a clinical stage pharmaceutical company, which engages in the discovery, development, and commercialization of small molecule protease inhibitors for diseases with significant unmet need. The company is headquartered in Framingham, Massachusetts and currently employs 270 full-time employees. The company went IPO on 2015-04-09. The firm is focused on the discovery, development and commercialization of drug therapies for diseases with significant unmet need. Its product candidate is sebetralstat, an inhibitor of plasma kallikrein being developed for hereditary angioedema (HAE). Sebetralstat is designed to offer people living with HAE a medication that can be taken as a discreet oral dose to readily treat HAE attacks on-demand, including at the earliest signs before the attack fully develops. Sebetralstat works by targeting the kallikrein-kinin system (KKS) cascade, selectively inhibiting plasma kallikrein and its uncontrolled activity that drives HAE attacks. The firm is also designing an oral Factor XIIa inhibitor for HAE prophylaxis, positioning KalVista to address the full spectrum of HAE disease management. Factor XIIa inhibitor program is developed to address other therapeutic areas, including inflammation and thrombosis.