 In 1982, Ferri and Hellman split ways and Ferri went to focus on early-stage companies, forming Matrix in Boston, Massachusetts while Hellman founded the San Francisco-based private equity firm, Hellman & Friedman which focused on later-stage firm investments.Among the firm's notable investments, Matrix Partners was an early-stage investor in Apple Inc., Arrowpoint Communications, Digium, JBoss, JustFab, PSINet, SanDisk, Silverstream Software, TheLadders.com, Sonus Networks, Tivoli Software, Tollbridge Technologies, VERITAS Software, Vermeer Technologies Incorporated, and Xilinx.In 1985, Matrix raised its first institutional private equity fund.