Cybersecurity software company Fortinet Inc. FTNT, -2.42% is set to replace Envision Healthcare Corp. EVHC, +0.02% in the S&P 500 index SPX, -0.82% S&P Dow Jones Indices said late Thursday. Fortinet, headquartered in Sunnyvale, Calif., will be added to the S&P 500 GICS systems software sub-industry index. Shares of Fortinet were down 0.5% in the extended session after ending the regular trading day down 2.4%.
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