Stockholders' Equity and Noncontrolling Interests (Tables)

3 Months Ended

Mar. 31, 2025

Stockholders' Equity and Noncontrolling Interests

Rollforward of consolidated changes in equity

A rollforward of consolidated changes in equity and redeemable noncontrolling interests for the three months ended March 31, 2025 is as follows:

	Stockholders’ equity attributable to Amphenol Corporation
											Accumulated						Redeemable
	Common Stock			Treasury Stock			Additional				Other		Non-				Non-
	Shares			Shares			Paid-In		Retained		Comprehensive		controlling		Total		controlling
	(in millions)	Amount		(in millions)	Amount		Capital		Earnings		Loss		Interests (1)		Equity		Interests
Balance as of December 31, 2024	1,212.9	$	1.2	(3.6)	$	(199.7)	$	3,601.8	$	7,105.0	$	(716.3)	$	55.4	$	9,847.4	$	8.7
Net income										737.8				6.1		743.9		0.3
Other comprehensive income (loss)												72.2		0.4		72.6		0.3
Purchase of treasury stock				(2.7)		(180.9)										(180.9)
Retirement of treasury stock	(2.7)		—	2.7		180.9				(180.9)						—
Stock options exercised	2.2		—	0.5		25.7		43.8		(16.4)						53.1
Dividends declared ($0.165 per common share)										(199.6)						(199.6)
Stock-based compensation expense								26.6								26.6
Balance as of March 31, 2025	1,212.4	$	1.2	(3.1)	$	(174.0)	$	3,672.2	$	7,445.9	$	(644.1)	$	61.9	$	10,363.1	$	9.3

(1) Excludes redeemable noncontrolling interests.

A rollforward of consolidated changes in equity and redeemable noncontrolling interests for the three months ended March 31, 2024 is as follows:

	Stockholders’ equity attributable to Amphenol Corporation
											Accumulated						Redeemable
	Common Stock			Treasury Stock			Additional				Other		Non-				Non-
	Shares			Shares			Paid-In		Retained		Comprehensive		controlling		Total		controlling
	(in millions)	Amount		(in millions)	Amount		Capital		Earnings		Loss		Interests (1)		Equity		Interests
Balance as of December 31, 2023	1,201.3	$	1.2	(3.5)	$	(142.8)	$	3,100.6	$	5,921.1	$	(533.6)	$	49.3	$	8,395.8	$	30.7
Net income										548.7				2.9		551.6		0.4
Other comprehensive income (loss)												(69.3)		(0.8)		(70.1)		(0.2)
Distributions to shareholders of noncontrolling interests														0.8		0.8
Purchase of treasury stock				(2.8)		(153.8)										(153.8)
Retirement of treasury stock	(2.8)		—	2.8		153.8				(153.8)						—
Stock options exercised	5.4		—	0.9		39.0		99.1		(20.4)						117.7
Dividends declared ($0.11 per common share)										(132.1)						(132.1)
Stock-based compensation expense								23.8								23.8
Balance as of March 31, 2024	1,203.9	$	1.2	(2.6)	$	(103.8)	$	3,223.5	$	6,163.5	$	(602.9)	$	52.2	$	8,733.7	$	30.9

(1) Excludes redeemable noncontrolling interests.

Schedules of dividends

	Three Months Ended March 31,
	2025		2024
Dividends declared	$	199.6	$	132.1
Dividends paid (including those declared in the prior year)		199.5		131.7