Former Sullivan & Cromwell associate Aaron B. Charney has moved to dismiss the law firm’s suit against him for disclosing client and firm confidences, arguing that most of the alleged confidences had already been made public by the firm itself.

The firm had sued Charney on Feb. 1 in response to the former mergers and acquisitions associate’s own Jan. 16 suit, which alleged he had been subject to discrimination by partners on the basis of his sexual orientation. In its suit, Sullivan & Cromwell claimed Charney improperly disclosed confidential information in both his complaint and in a series of media interviews about his claims.