Common stock (Tables)

3 Months Ended

Mar. 31, 2025

Equity [Abstract]

Changes in issued, treasury and outstanding Berkshire common stock

Changes in shares of Berkshire’s common stock are shown in the table below. In addition to our common stock, one million shares of preferred stock are authorized, but none are issued.

	Class A, $5 Par Value (1.65 million shares authorized)									Class B, $0.0033 Par Value (3.225 billion shares authorized)
	Issued			Treasury			Outstanding			Issued		Treasury			Outstanding
Balance at December 31, 2024		623,902			(76,340	)		547,562			1,551,291,352		(215,299,213	)		1,335,992,139
Conversions of Class A to    Class B common stock		(3,717	)		—			(3,717	)		5,575,500		—			5,575,500
Balance at March 31, 2025		620,185			(76,340	)		543,845			1,556,866,852		(215,299,213	)		1,341,567,639

Notes to Consolidated Financial Statements

Note 18. Common stock