EXHIBIT 99
This Current Report on Form 8-K includes supplemental unaudited historical business segment and disaggregated revenue information that reflects the following:
•Changes in the measure of segment operating performance used by 3M’s chief operating decision maker     

The Company did not operate using this measure of segment operating performance in periods prior to the first quarter of 2022 and will begin to report comparative results under this basis with the filing of its Quarterly Report on Form 10-Q for the quarter ending March 31, 2022. Until 3M’s interim financial statements as of and for the quarter ending March 31, 2022 are issued, amounts on the updated basis are not in accordance with U.S. GAAP and, as a result, are considered non-GAAP measures. The Company is furnishing this information as it believes it is useful to investors to aid in understanding, on a timely basis, the impacts of these changes on historical periods as they prepare to consider 3M’s future results on the updated basis.

The information contained in this Current Report shall not be deemed to be “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934 (the “Exchange Act”) or otherwise subject to the liabilities of that section, nor shall it be incorporated by reference into a filing under the Securities Act of 1933, or the Exchange Act.

Changes in the measure of segment operating performance used by 3M’s chief operating decision maker (CODM)

Note 19 to 3M’s consolidated financial statements in its 2021 Annual Report on Form 10-K describes 3M’s business segments and measure of segment operating performance used by 3M’s CODM. As discussed therein, the measure of segment operating performance included dual credit for certain sales and related operating income.

Effective in the first quarter of 2022, the measure of segment operating performance used by 3M’s CODM changed and, as a result, 3M’s disclosed measure of segment profit/loss (business segment operating income) will be updated for all comparative periods presented. The change to business segment sales and operating income aligns with the update to how the CODM assesses performance and allocates resources for the Company’s business segments. The change included the following:
Eliminating inclusion of dual credit in measure of segment operating performance

3M business segment operating performance measures were updated to no longer include dual credit to business segments for certain sales and related operating income. Management previously evaluated its business segments based on net sales and operating income performance, including dual credit reporting. 3M reflected additional (“dual”) credit to another business segment when the customer account activity (“sales district”) with respect to the particular product sold to the external customer was provided by a different business segment. For example, privacy screen protection products are primarily sold by the Display Materials and Systems Division within the Transportation and Electronics business segment; however, certain sales districts within the Consumer business segment provide the customer account activity for sales of the product to particular customers. In this example, the non-primary selling segment (Consumer) previously would also have received credit for the associated net sales initiated through its sales district and the related approximate operating income. The offset to the dual credit business segment reporting was reflected as a reconciling item entitled “Elimination of Dual Credit,” such that sales and operating income in total were unchanged.

The tables below provide additional information with respect to the expected impact of the changes described above on previously reported segment and disaggregated revenue information. 3M discloses business segment operating income as its measure of segment profit/loss, reconciled to both total 3M operating income and income before taxes. 





EXHIBIT 99
Updated Basis (non-GAAP measure)Total Year
Net Sales (Millions)First
Quarter		Second QuarterThird QuarterFourth QuarterPreviously ReportedImpact of ChangesUpdated basis (non-GAAP measure)
Safety and Industrial
2021$3,099 $3,029 $3,005 $2,848 $12,880 $(899)$11,981 
20202,733 2,487 2,820 2,932 11,734 (762)10,972 
20192,758 2,736 2,619 2,591 11,490 (786)10,704 
Transportation and Electronics
2021$2,396 $2,355 $2,327 $2,184 $9,769 $(507)$9,262 
20202,130 1,849 2,206 2,221 8,833 (427)8,406 
20192,245 2,341 2,383 2,178 9,595 (448)9,147 
Health Care
2021$2,069 $2,165 $2,173 $2,190 $9,050 $(453)$8,597 
20202,048 1,683 2,004 2,097 8,345 (513)7,832 
20191,713 1,808 1,702 2,122 7,431 (86)7,345 
Consumer
2021$1,289 $1,400 $1,434 $1,390 $5,856 $(343)$5,513 
20201,164 1,156 1,322 1,334 5,311 (335)4,976 
20191,125 1,238 1,259 1,209 5,129 (298)4,831 
Corporate and Unallocated
2021$(2)$1 $3 $— $2 $— $2 
2020— 1 (2)(1)(2)— (2)
201922 48 28 11 109 — 109 
Elimination of Dual Credit
2021$— $— $— $— $(2,202)$2,202 $— 
2020— — — — (2,037)2,037 — 
2019— — — — (1,618)1,618 — 
Total Company
2021$8,851 $8,950 $8,942 $8,612 $35,355 $— $35,355 
20208,075 7,176 8,350 8,583 32,184 — 32,184 
20197,863 8,171 7,991 8,111 32,136 — 32,136 




EXHIBIT 99
Updated Basis (non-GAAP measure)Total Year
Operating Performance (millions)First
Quarter		Second QuarterThird QuarterFourth QuarterPreviously ReportedImpact of ChangesUpdated basis (non-GAAP measure)
Safety and Industrial
2021$752 $662 $562 $490 $2,692 $(226)$2,466 
2020645 580 723 640 2,784 (196)2,588 
2019568 572 562 477 2,373 (194)2,179 
Transportation and Electronics
2021$556 $513 $435 $376 $2,008 $(128)$1,880 
2020436 338 484 443 1,814 (113)1,701 
2019465 547 576 422 2,119 (109)2,010 
Health Care
2021$464 $548 $510 $515 $2,150 $(113)$2,037 
2020438 266 454 504 1,790 (128)1,662 
2019435 466 437 436 1,796 (22)1,774 
Consumer
2021$269 $290 $308 $295 $1,248 $(86)$1,162 
2020243 259 321 296 1,203 (84)1,119 
2019205 246 279 271 1,075 (74)1,001 
Elimination of Dual Credit
2021$— $— $— $— $(553)$553 $— 
2020— — — — (521)521 — 
2019— — — — (399)399 — 
Total business segment operating income
2021$2,041 $2,013 $1,815 $1,676 $7,545 $— $7,545 
20201,762 1,443 1,982 1,883 7,070 — 7,070 
20191,673 1,831 1,854 1,606 6,964 — 6,964 
Corporate and Unallocated
2021$(47)$(42)$(27)$(60)$(176)$— $(176)
2020(99)297 (73)(34)91 — 91 
2019(537)(129)157 (281)(790)— (790)
Total Company operating income
2021$1,994 $1,971 $1,788 $1,616 $7,369 $— $7,369 
20201,663 1,740 1,909 1,849 7,161 — 7,161 
20191,136 1,702 2,011 1,325 6,174 — 6,174 
Other expense/(income), net
2021$165 $— $165 
2020366 — 366 
2019531 — 531 
Income before income taxes
2021$7,204 $— $7,204 
20206,795 — 6,795 
20195,643 — 5,643 





EXHIBIT 99
Disaggregated revenue information
Updated Basis (non-GAAP measure)
Year ended December 31,
Net Sales (Millions)202120202019
Abrasives$1,296 $1,077 $1,280 
Automotive Aftermarket1,164 1,028 1,152 
Closure and Masking Systems1,033 993 1,111 
Electrical Markets1,229 1,093 1,180 
Industrial Adhesives and Tapes2,353 2,000 2,114 
Personal Safety4,470 4,408 3,472 
Roofing Granules428 389 366 
Other Safety and Industrial8 (16)29 
Total Safety and Industrial Business Segment11,981 10,972 10,704 
Advanced Materials1,200 1,029 1,236 
Automotive and Aerospace1,756 1,522 1,806 
Commercial Solutions1,717 1,486 1,733 
Electronics3,673 3,497 3,446 
Transportation Safety907 880 932 
Other Transportation and Electronics9 (8)(6)
Total Transportation and Electronics Business Segment9,262 8,406 9,147 
Drug Delivery— 146 371 
Food Safety368 337 337 
Health Information Systems1,220 1,140 1,177 
Medical Solutions4,632 4,288 3,361 
Oral Care1,420 1,071 1,320 
Separation and Purification Sciences956 848 784 
Other Health Care1 2 (5)
Total Health Care Business Group8,597 7,832 7,345 
Consumer Health and Safety588 540 583 
Home Care1,074 1,043 968 
Home Improvement2,548 2,260 2,001 
Stationery and Office1,306 1,132 1,286 
Other Consumer(3)1 (7)
Total Consumer Business Group5,513 4,976 4,831 
Corporate and Unallocated2 (2)109 
Total Company$35,355 $32,184 $32,136