NSA - Charles River moving to S&P 500; EFC AZPN rise on index changes

Charles River Laboratories International (CRL) is moving into the S&P 500 in the latest index shuffle from S&P Dow Jones Indices. It's moving up to replace FLIR Systems (FLIR), set to be acquired by Teledyne Technologies. CRL is down 0.6% after hours. Taking Charles River's place in the S&P MidCap 400 is National Storage Affiliates Trust (NSA) - and taking NSA's place in the SmallCap 600 is Ellington Financial (EFC). EFC is up 9.7% after hours. Those moves are effective prior to the open of trading on Friday, May 14. Elsewhere, Avanos Medical (AVNS) is moving down to the SmallCap 600 in order to replace Aegion (AEGN), which is set to be acquired by New Mountain Capital. Replacing Avanos Medical in the MidCap 400 is Aspen Technology (AZPN). Those moves are effective prior to the open of trading Monday, May 17. Aspen Tech is up 3.2% postmarket.

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Charles River moving to S&P 500; EFC, AZPN rise on index changes