UMB Financial Corp entered into a merger agreement with Heartland Financial USA, Inc. and Blue Sky Merger Sub Inc., and filed a registration statement with the SEC. Lawsuits have been filed against HTLF and UMB by purported stockholders of HTLF. UMB and HTLF believe the claims are without merit and are supplementing the joint proxy statement/prospectus to avoid delays or adverse effects on the merger.