Goodwill: 3M periodically acquires businesses aligned with its strategic goals, such as growth markets and adjacent products or technologies. Goodwill resulting from business acquisitions is qualitatively attributable to the existing workforce of the

acquiree and synergies expected to arise from combining the acquiree and 3M operations. The change in the carrying amount of goodwill by business segment was as follows:


(Millions)	Safety and Industrial		Transportation and Electronics		Consumer		Corporate		Total Company
Balance as of December 31, 2024	$	4,469	$	1,496	$	258	$	58	$	6,281



Translation and other(a)	102		29		7		—		138
Balance as of December 31, 2025	$	4,571	$	1,525	$	265	$	58	$	6,419
Acquisition activity	982		—		—		—		982


Translation and other(a)	(46)		(9)		(2)		—		(57)
Balance as of September 30, 2026	$	5,507	$	1,516	$	263	$	58	$	7,344

(a) The amounts in the “Translation and other” primarily relate to changes in foreign currency exchange rates.

Acquired Intangible Assets: The carrying amount and accumulated amortization of the Company's acquired finite-lived intangible assets and the balances of non-amortizable intangible assets are presented below:



		September 30, 2026									December 31, 2025
(Millions)	Gross carrying amount(b)			Accumulated amortization (b)			Net carrying amount			Gross carrying amount			Accumulated amortization			Net carrying amount
Finite-lived intangible assets
Customer related		$	1,767		$	(793)					$	1,239		$	(925)
Patents and technology		256			(153)						573			(544)
Definite-lived tradenames		715			(337)						482			(318)
Other		28			(10)						47			(30)
Total		$	2,766		$	(1,293)		$	1,473		$	2,341		$	(1,817)		$	524
Indefinite lived intangible assets(c)					579									579
Total intangible assets — net								$	2,052								$	1,103

(b) For the period ended September 30, 2026, finite-lived intangible asset were impacted by acquisitions as discussed in Note 3, net of retirement of certain fully amortized assets.

(c) Indefinite lived intangible assets primarily consists of certain tradenames acquired by 3M that are not amortized because they have existed for over 60 years, maintain leading-market share positions, are continuously renewed, and are associated with products expected to generate cash flows for 3M for an indefinite period.



	Three months ended September 30,				Nine months ended September 30,
(Millions)	2026		2025		2026		2025
Amortization expense	$	41	$	26	$	90	$	78

Expected amortization expense for acquired amortizable intangible assets recorded as of September 30, 2026 follows:


(Millions)	Remainder of 2026		2027		2028		2029		2030		2031		After 2031
Amortization expense	$	40	$	142	$	117	$	115	$	115	$	114	$	830