The Krislov firm is perhaps best known in Illinois for its derivative actions brought against state and local governments to correct the massively under-funded state and local pension systems. These include, Ryan v. City of Chicago, 148 Ill. App. 3d 638 (1st Dist. 1986) and 274 Ill. App. 3d 483 (1st Dist. 1995), in which the Krislov firm has already recovered in excess of $32 million cash in a settlement valued at $80 million. Ryan ended the City of Chicago's illegal use of pension tax levies. See also People ex rel. Sklowdowski v. State,-- Ill. App. 3d -- , 1996 WL 454953 (Ill. App. Aug. 13, 1996) and 112 Ill.2d 117 (1994) establishing trial courts power to compel State Officials to comply with statutory minimum contribution obligation for the five States - funded retirement systems to correct a shortfall now totalling $3.4 billion). In City of Chicago v. Korshak, 206 Ill. App. 3d 968 (1st Dist. 1990) and Retired Chicago Police Ass'n v. City of Chicago, 7 F.3d 584 (7th Cir. 1992), parallel state and federal cases, the firm forced the City of Chicago to continue retiree health care insurance for 21,000 retirees and their families.

The Krislov firm is perhaps the sole remaining initiator of private attorney general derivative cases in Illinois seeking recovery for governmental fraud, abuse and mismanagement. See Ryan v. Cosentino, 776 F. Supp. 386 (N.D. Ill. 1991), 793 F. Supp. 822 (N.D. Ill. 1992), and 1995 WL 516603 (N.D. Ill. August 24, 1995); McKay v. Kusper, 252 Ill. App. 3d 450 (1993).