UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 14A

Proxy Statement Pursuant to Section 14(a) of the Securities

Exchange Act of 1934 (Amendment No.            )

Filed by the Registrant [P]

Filed by a Party other than the Registrant [   ]

Check the appropriate box:

[   ]

Preliminary Proxy Statement

[   ]

Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))

[   ]

Definitive Proxy Statement

[   ]

Definitive Additional Materials

[P]

Soliciting Material Pursuant to §240.14a-12

                                                                                WAUSAU PAPER CORP.

(Name of Registrant as Specified In Its Charter)

                                                                                    NOT APPLICABLE

(Name of Person(s) Filing Proxy Statement, if other than the Registrant)

Payment of Filing Fee (Check the appropriate box):

[P]

No fee required.

[   ]

Fee computed on table below per Exchange Act Rules 14a-6(i)(1) and 0-11.

1)

Title of each class of securities to which transaction applies:

2)

Aggregate number of securities to which transaction applies:

3)

Per unit price or other underlying value of transaction computed pursuant to Exchange Act Rule 0-11 (set forth the amount on which the filing fee is calculated and state how it was determined):

4)

Proposed maximum aggregate value of transaction:

5)

Total fee paid:

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[   ]

Fee paid previously with preliminary materials.

[   ]

Check box if any part of  the fee is offset as provided by Exchange Act Rule 0-11(a)(2) and identify the filing for which the offsetting fee was paid previously.  Identify the previous filing by registration statement number, or the Form or Schedule and the date of its filing.

1)

Amount Previously Paid:

2)

Form, Schedule or Registration Statement No.:

3)

Filing Party:

4)

Date Filed:

Important Information

This information may be deemed to be solicitation material in respect of the solicitation of proxies from shareholders in connection with Wausau Paper Corp.’s 2013 annual meeting of shareholders.  Wausau Paper Corp. (the “Company”), its directors and certain of its executive officers and employees may be deemed to be participants in such solicitation. The Company will file a proxy statement with the Securities and Exchange Commission (the “SEC”) in connection with its 2013 annual meeting of shareholders. The proxy statement, any other relevant documents and other material filed with the SEC concerning the Company will be, when filed, available free of charge at www.sec.gov and www.wausaupaper.com.  Shareholders are urged to read the proxy statement and any other relevant documents filed when they become available because they will contain important information.

Information Regarding Participants

The Company, its directors and certain of its executive officers and employees may be deemed to be participants in the solicitation of proxies from shareholders in connection with the Company’s 2013 annual meeting of shareholders.  Information concerning these participants is available in the Company’s proxy statement for the 2012 annual meeting of shareholders filed with the SEC on March 15, 2012, and in subsequent SEC filings on Forms 3 and 4.  Shareholders are advised to read the Company’s proxy statement for the 2013 annual meeting of shareholders and other relevant documents when they become available, because they will contain important information, including information with respect to such participants. You can obtain free copies of these referenced documents as described above.

On February 11, 2013, the Company held a conference call to discuss its earnings for the fourth quarter of 2012.  A transcript of the Company’s prepared remarks has been previously filed.  The Company’s slide presentation materials follow:

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