SCHEDULE 14A INFORMATION PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES EXCHANGE ACT OF 1934 Filed by the Registrant [X] Filed by a Party other than the Registrant [ ] Check the appropriate box: <Table> [ ] Preliminary Proxy Statement [ ] Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) [ ] Definitive Proxy Statement [X] Definitive Additional Materials [ ] Soliciting Material Pursuant to Section 240.14 a-12 </Table> MUNDER SERIES TRUST MUNDER SERIES TRUST II THE MUNDER @VANTAGE FUND - ------------------------------------------------------------------------------ (Name of Registrant as Specified In Its Charter) ------------------------------------------------------------------------------ (Name of Person(s) Filing Proxy Statement, if other than the Registrant) Payment of Filing Fee (Check the appropriate box): [X] 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: ---------------------------------------------------------------------- [ ] 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: ---------------------------------------------------------------------- (MUNDER LOGO) TUESDAY, DECEMBER 5, 2006 Dear Shareholder: We have attempted to contact you numerous times by phone or by mail with regard to your investment in The Munder Funds. The Special Meeting of Shareholders was originally scheduled for October 26, 2006 and was adjourned until November 20th. Since your Fund did not receive enough votes to conduct the formal business of the Meeting on November 20th, the Meeting has been adjourned once again to December 14th. WE ARE WRITING TO YOU BECAUSE YOUR SHARES HAVE NOT YET BEEN VOTED AND IT IS VERY IMPORTANT THAT YOUR SHARES ARE REPRESENTED AT THE SPECIAL MEETING. You may think your investment is insignificant to the outcome of this Meeting, but it is not. The remaining unvoted shares are primarily held by shareholders just like you. In order for the Fund to reach the required 50% voting level to complete the business of the Meeting, we need shareholders like you to vote before December 14th. Time is running out until the next adjourned Meeting, so please take a moment to vote your shares today! Should you have any questions regarding your proxy vote, please call 1-800-331-7487. Thank you in advance for your assistance with this matter. Sincerely, /s/ John S. Adams - ----------------------------------------- John S. Adams President and Principal Executive Officer The Munder Funds THE TELEPHONE AND INTERNET VOTING OPTIONS ONLY TAKE A FEW MOMENTS OF YOUR TIME AND YOUR VOTE WILL BE RECORDED INSTANTLY. PLEASE USE ONE OF THESE OPTIONS IF AVAILABLE TO YOU. (TELEPHONE) VOTE BY PHONE. (COMPUTER) VOTE BY INTERNET. (ENVELOPE) VOTE BY MAIL. You You may simply call Log on to may cast your vote the toll-free number www.proxyvote.com by signing and dating found on the and follow the simple the enclosed proxy enclosed proxy card. instructions on the card and inserting it website. in the postage-paid envelope provided.