H.F. Ahmanson & Co. has escalated its battle for Great Western Financial Corp. with a new filing designed to plant doubts about its rival's accounting plans.

The Irwindale, Calif., thrift, which made a hostile bid for Great Western on Feb. 18, wants Great Western's planned merger with Washington Mutual Inc. halted on the grounds that it cannot be accounted for as a pooling of interests as the would-be partners intend.

Limited Time Offer

Save $400 off your subscription. Special offer ends April 30, 2017.

14-Day Free Trial

No credit card required. Complete access to articles, breaking news and industry data.