Exhibit 99.1

Certification Pursuant To
18 U.S.C. Section 1350,
As Adopted Pursuant To
Section 906 of the Sarbanes-Oxley Act of 2002

In connection with the Quarterly Report of Imation Corp. (the “Company”) on Form 10-Q for the period ending March 31, 2003, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, William T. Monahan, Chairman and Chief Executive Officer of the Company, certify, pursuant to 18 U.S.C. section 1350, as adopted pursuant to section 906 of the Sarbanes-Oxley Act of 2002, that:

(1)  The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2)  The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ William T. Monahan

William T. Monahan
Chairman and
Chief Executive Officer

May 9, 2003

A signed original of this written statement required by Section 906 has been provided to Imation Corp. and will be retained by Imation Corp. and furnished to the Securities and Exchange Commission or its staff upon request.