PTC Set to Join S&P 500; Lattice Semiconductor & Progyny to Join S&P MidCap 400; Domtar to Join S&P SmallCap 600

b'NEW YORK, April 15, 2021 /PRNewswire/ --S&P Dow Jones Indices will make the following changes to the S&P 500, S&P MidCap 400, and S&P SmallCap 600 effective prior to the open of trading on Tuesday, April 20:\nS&P MidCap 400 constituent PTC Inc. (NASD:PTC) will replace Varian Medical Systems Inc. (NYSE:VAR) in the S&P 500, and Lattice Semiconductor Co. (NASD:LSCC) will replace PTC in the S&P MidCap 400.