Associated Banc-Corp. chairman H.B. Conlon has more than doubled the size of his Green Bay, Wis., company since 1991, and his move to merge with First Financial Corp. of Stevens Point, Wis.-announced Wednesday-would more than double it again, Mr. Conlon said Thursday.

The 61-year-old Mr. Conlon said the resulting $10.5 billion-asset company would have more clout to do acquisitions outside its existing markets in Wisconsin and Illinois.

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