Constantine Karayannopoulos

Constantine Karayannopoulos is former president and CEO of Neo Performance Materials and previously served as executive chair of the company’s board. Over a multi-decade career in advanced materials and industrial technology, he helped expand Neo’s position in rare earth and specialty materials markets.


Neo Performance Materials is a Canadian advanced materials company focused on rare earth and rare metal value chains. Listed on the Toronto Stock Exchange, the company develops and manufactures magnetic powders and magnets, specialty chemicals, metals and alloys used across clean energy, automotive, electronics, industrial automation and environmental applications. Its operations span North America, Europe and Asia and are organized across three core business segments: Magnequench, Chemicals & Oxides, and Rare Metals.