3M Company (MMM)

SECTION 16(a) BENEFICIAL OWNERSHIP REPORTING COMPLIANCE

Section 16(a) of the Securities Exchange Act of 1934 requires our directors and executive officers to file with the Securities Exchange Commission reports regarding their ownership and changes in ownership of our stock. 3M believes that during 2006, its directors and executive officers complied with all Section 16(a) filing requirements. In making this statement, 3M has relied upon examination of the copies of Forms 3, 4, and 5 and the written representations of its directors and executive officers.

Section 16(a) of the Securities Exchange Act of 1934 requires our directors and executive officers to file with the Securities Exchange Commission reports regarding their ownership and changes in ownership of our stock. 3M believes that during 2005, its directors and executive officers complied with all Section 16(a) filing requirements. In making this statement, 3M has relied upon examination of the copies of Forms 3, 4, and 5 and the written representations of its directors and executive officers.

Section 16(a) of the Securities Exchange Act of 1934 requires our directors and executive officers to file with the Securities Exchange Commission reports regarding their ownership and changes in ownership of our stock. 3M believes that during 2004, its directors and executive officers complied with all Section 16(a) filing requirements. In making this statement, 3M has relied upon examination of the copies of Forms 3, 4, and 5 and the written representations of its directors and executive officers.

31