A Connecticut investment management firm is fighting to keep its $25 million fraud and breach-of-contract suit stemming from a high-profile Chancery Court appraisal case in Delaware, arguing that a proposed move to Illinois federal court would improperly deprive the firm of its chosen venue for litigation.

The suit, filed by Verition Partners Master Fund, accuses Chicago-based litigation services firm Coherent Economics of failing to disclose disparaging remarks that expert witness W. Bradford Cornell made about the firm’s appraisal claims in a suit over the fair value of AOL Inc. after it was acquired by telecommunications giant Verizon in a $4.4 billion deal in June 2015.