Trading Techs., Intl., Inc. v. BGC Partners, Inc., No. 10 C 715, Slip Op. (N.D. Ill. Aug. 17, 2010) (Kendall, J.).

Judge Kendall denied defendant BGC Partners’ ("BGC") motion to dismiss as moot because of plaintiff Trading Technologies’ ("TT’s") subsequently filed amended complaint. Courts routinely deny without prejudice motions to dismiss when an amended complaint is filed, but this case was unique because TT opposed dismissal. TT argued that BGC’s improper service argument should be dismissed with prejudice and the remaining arguments should be heard to avoid delay because TT continued asserting similar claims in the amended complaint. The service arguments were, however, moot because BGC did not make the service arguments in response to the amended complaint.

The Court also denied the motion to dismiss without prejudice as to the remaining arguments. While the claims may have remained factually similar, BGC’s arguments went to jurisdiction, not the sufficiency of the facts. Furthermore, the amended complaint added several new defendants. BGC and the other defendants would have been prejudiced if they were not given the opportunity to review the amended complaint and to collectively decide how to address any jurisdiction or venue issues.