Matthew M. Riccardi and Shari A. Brandt of Perkins Coie have entered appearances for CME Group Inc. in a pending securities class action.

The suit, filed April 5 in the U.S. District Court for the Southern District of New York by the New Jersey-based Tang PC, accuses the defendants of misappropriating more than $10.8 billion in funds from investors for Crude Oil Treasure (COT) accounts.