The merger of Midland States Bank and Centrue Bank was effective on Sept. 1, according to a regulatory report of the Illinois Department of Financial and Professional Regulation.

The Federal Reserve Bank of St. Louis approved the merger on April 18; the Illinois regulator approved the deal on May 9.

As of June 30, Effingham, Ill.-based Midland States Bancorp Inc. had $4.49 billion in assets, while Ottawa, Ill.-based Centrue Financial Corp. had $975.8 million in assets.