SCHEDULE 14A INFORMATION

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

Exchange Act of 1934 (Amendment No. )

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Filed by a Party other than the Registrant  ¨

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¨  Preliminary Proxy Statement

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¨  Definitive Proxy Statement

x  Definitive Additional Materials

¨  Soliciting Material under §240.14a-12

IMATION CORP.

(Name of Registrant as Specified in Its Charter)

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

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x   No fee required.

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April 5, 2012

Dear Fellow Shareholder:

We have previously sent to you proxy material for the Annual Meeting of Shareholders of Imation Corp. to be held on May 2, 2012. Your Board of Directors unanimously recommends that you vote FOR all of the proposals on the agenda.

Your vote is important, no matter how many or how few shares you may own. If you have not already done so, please vote TODAY by telephone, via the Internet, or by signing, dating and returning the enclosed proxy card in the postage-paid envelope provided, to ensure that your shares are represented at the Annual Meeting.

Sincerely,

Mark E. Lucas

President and Chief Executive Officer

REMEMBER:

You can vote your shares by telephone, or via the Internet.

Please follow the easy instructions on the enclosed proxy card.

If you have any questions, or need assistance in voting

your shares, please call our proxy solicitor,

INNISFREE M&A INCORPORATED

TOLL-FREE, at 1-888-750-5834.