#1 Includes shares acquired under 3M's General Employee Stock Purchase Plan.

#2 Includes dividend share equivalents, accrued quarterly, pursuant to 3M's Deferred Compensation Plan.

#1 Represents shares of 3M common stock that will be delivered pursuant to the terms of performance share awards made to the reporting person on March 1, 2021. The performance-based vesting requirements applicable to such awards were satisfied on the date reported in Column 2 above, which represents the date on which the level of performance attained was certified. The reporting person previously elected to defer receipt of fifty percent of the shares and will not have voting or investment powers with respect to such shares until they are issued.

#2 Includes dividend share equivalents, accrued quarterly, pursuant to 3M's Deferred Compensation Plan.

#3 Includes shares acquired under 3M's General Employee Stock Purchase Plan.

#4 The number of shares withheld for taxes was estimated and will be revised by amendment if necessary.

#1 Represents shares of 3M common stock that will be delivered pursuant to the terms of performance share awards made to the reporting person on March 1, 2021. The performance-based vesting requirements applicable to such awards were satisfied on the date reported in Column 2 above, which represents the date on which the level of performance attained was certified. The reporting person previously elected to defer receipt of fifty percent of the shares and will not have voting or investment powers with respect to such shares until they are issued.

#2 Includes dividend share equivalents, accrued quarterly, pursuant to 3M's Deferred Compensation Plan.

#3 Includes shares acquired under 3M's General Employee Stock Purchase Plan.

#4 The number of shares withheld for taxes was estimated and will be revised by amendment if necessary.

#1 Each restricted stock unit represents a contingent right to receive one share of 3M common stock.

#2 Shares withheld for FICA tax for retirement eligible executives.