As filed with the Securities and Exchange Commission on May 19, 1997 Registration No. 333-02845 AMENDMENT NO. 1 TO FORM S-8 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 WAUSAU PAPER MILLS COMPANY (Exact name of registrant as specified in its charter) WISCONSIN 39-0690900 (State or other jurisdiction of (I.R.S. Employer incorporation or organization) Identification No.) ONE CLARK'S ISLAND P.O. BOX 1408 WAUSAU, WISCONSIN 54402-1408 (Address of principal executive offices) (Zip Code) WAUSAU PAPER MILLS COMPANY SALARIED SAVINGS AND INVESTMENT PLAN (Full title of the plan) STEVEN A. SCHMIDT VICE PRESIDENT-FINANCE, SECRETARY AND TREASURER WAUSAU PAPER MILLS COMPANY P.O. BOX 1408 WAUSAU, WI 54402-1408 (715) 845-5266 Copies to: ARNOLD J. KIBURZ III RUDER, WARE & MICHLER, S.C. P.O. BOX 8050 WAUSAU, WI 54402-8050 (715) 845-4336 (Name, address, including zip code, and telephone number, including area code, of agent for service) CALCULATION OF REGISTRATION FEE Amount of Proposed Proposed Amount of additional Maximum maximum registration fee Title of securities securities to be offering aggregate for additional to be registered(1) registered price per unit offering price securities Common stock, 175,000(2) $ (2) $ (2) $997.63(3) no par value <FN> (1) In addition, pursuant to Rule 416(c) under the Securities Act of 1933, this registration statement also covers an indeterminate amount of interests to be offered or sold pursuant to the employee benefit plan described herein. (2) Maximum number of additional shares which are estimated will be acquired by Plan during the 12-month period ending May 18, 1998. (3) Estimated solely for purposes of calculating registration fee for 175,000 additional shares pursuant to Rule 457(h); calculated pursuant to Rule 457(c) as of May 14, 1997. This Amendment No. 1 to Form S-8 Registration Statement No. 333-02845 for the Wausau Paper Mills Company Salaried Savings and Investment Plan is filed to increase the number of shares registered in connection with the Plan from 75,000 shares to 250,000 shares. The contents of Registration Statement No. 333-02845 are hereby incorporated by reference. SIGNATURES Pursuant to the requirements of the Securities Act of 1933, the Registrant certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-8 and has duly caused this Amendment No. 1 to this Registration Statement on Form S-8 to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Wausau, State of Wisconsin, on May 16, 1997. WAUSAU PAPER MILLS COMPANY By: STEVEN A. SCHMIDT Steven A. Schmidt Vice President-Finance, Secretary and Treasurer (On behalf of Registrant and as Principal Financial Officer) SIGNATURES Pursuant to the requirements of the Securities Act of 1933, this Amendment No. 1 to Registration Statement on Form S-8 has been signed on May 16, 1997 by the following persons in the capacities indicated. SAN W. ORR, JR.* DANIEL D. KING* San W. Orr, Jr. Daniel D. King Chairman of the Board President and Chief Executive Officer and a Director (Principal Executive Officer) DAVID B. SMITH, JR.* STEVEN A. SCHMIDT* David B. Smith, Jr. Steven A. Schmidt Director Vice President-Finance, Secretary and Treasurer (Principal Accounting Officer) HARRY R. BAKER* Harry R. Baker Director *STEVEN A. SCHMIDT Steven A. Schmidt as attorney-in-fact May 16, 1997. SIGNATURES KNOW ALL MEN BY THESE PRESENTS, that Gary W. Freels whose signature appears below constitutes and appoints Daniel D. King and Steven A. Schmidt and each of them, his true and lawful attorney-in-fact and agent, with full power of substitution and resubstitution, for him and in his name, place and stead, in any and all capacities, to sign any and all amendments (including post-effective amendments) to this Amendment No. 1 to Form S-8 Registration Statement and to file the same, with all exhibits thereto, and other documents in connection therewith, with the Securities and Exchange Commission and any other regulatory authority, granting unto said attorney-in-fact and agent, full power and authority to do and perform each and every act and thing required and necessary to be done in and about the premises, as fully to all intents and purposes as he might or could do in person, hereby ratifying and confirming all that said attorney-in-fact and agent, or his substitute, may lawfully do or cause to be done by virtue hereof. Pursuant to the requirements of the Securities Act of 1933, this Amendment No. 1 to Registration Statement on Form S-8 has been signed on May 16, 1997, by the following person in the capacity indicated. GARY W. FREELS Gary W. Freels Director