X0202 4 2007-09-28 0000105076 WAUSAU PAPER CORP. WPP 0001379719 Trettin Daniel R 723 N. 12TH AVENUE WAUSAU WI 54401 0 1 0 0 Sr. VP, Printing & Writing No Par Value Common Stock 823 I 401(k) Trust Estimated amount. Represents an unallocated interest in a 401(k) common stock investment fund. Sherri L. Lemmer, Attorney-in-Fact 2007-10-02