3M CO

If you hold shares directly as the shareholder of record, you may vote by granting a proxy or by voting electronically at the

virtual Annual Meeting. If you hold shares beneficially in street name, you may vote by submitting voting instructions to

your broker or other nominee or electronically at the Annual Meeting by requesting a legal proxy from your broker or other

nominee. If you own shares beneficially as a participant in the 3M Voluntary Investment Plan and Employee Stock

Ownership Plan or the 3M Savings Plan, you may vote by submitting voting instructions to the trustee. In most instances,

you will be able to do this over the Internet, by telephone, or by mail. Even if you plan to attend the Annual Meeting, we

recommend that you vote your shares in advance as described below so that your vote will be counted if you later decide

not to attend the Annual Meeting.

Please refer to the summary instructions below and those included on your Notice of Internet Availability of Proxy

Materials or proxy card or, for shares held in street name, the voting instruction card provided by your broker or

other nominee.

The Internet and telephone voting procedures are designed to authenticate shareholders by use of a control number and

to allow you to confirm that your instructions have been properly recorded. If you vote by telephone or on the Internet, you

do not need to return your proxy card. Telephone and Internet voting for shareholders of record will be available 24 hours

a day, up until 10:59 p.m., Central Daylight Time, on May 11, 2026. Participants in 3M’s Voluntary Investment Plan and

Employee Stock Ownership Plan and the 3M Savings Plan may instruct the trustee how to vote their shares via the

Internet, by telephone, or by signing and returning the proxy card by 10:59 p.m., Central Daylight Time, on May 10, 2026.

All shares that have been properly voted and not revoked will be voted at the Annual Meeting.

Other information