 LEAWOOD, KS ACCESSWIRE May 12, 2021 TortoiseEcofin today announced that Aegion Corp NASDAQ:AEGN will be removed from the Ecofin Global Water ESG Index SM EGWESG pending the close of the announced merger transaction with affiliates of New Mountain Capital, LLC. If approved, AEGN will be removed from the index at market open on Monday, May 17, 2021. 