Other Comprehensive Income (Loss) (Tables)

9 Months Ended

Sep. 30, 2025

The before and after-tax amounts allocated to each component of other comprehensive income (loss) are presented in the following table. Reclassification adjustments related to securities available for sale are included in net gain (loss) on securities transactions in the accompanying consolidated statements of income. Reclassification adjustments related to defined-benefit post-retirement benefit plans are included in the computation of net periodic pension expense (see Note 11 – Defined Benefit Plans).


	Three Months Ended September 30, 2025						Three Months Ended September 30, 2024
	Before Tax Amount		Tax Expense, (Benefit)		Net of Tax Amount		Before Tax Amount		Tax Expense, (Benefit)		Net of Tax Amount
Securities available for sale and transferred securities:
Change in net unrealized gain/loss during the period	$	273,173	$	57,366	$	215,807	$	498,371	$	104,658	$	393,713
Change in net unrealized gain on securities transferred to held to maturity	—		—		—		(150)		(31)		(119)
Reclassification adjustment for net (gains) losses included in net income	—		—		—		(16)		(3)		(13)
Total securities available for sale and transferred securities	273,173		57,366		215,807		498,205		104,624		393,581
Defined-benefit post-retirement benefit plans:

Reclassification adjustment for net amortization of actuarial gain/loss included in net income as a component of net periodic cost (benefit)	310		65		245		418		88		330
Total defined-benefit post-retirement benefit plans	310		65		245		418		88		330
Total other comprehensive income (loss)	$	273,483	$	57,431	$	216,052	$	498,623	$	104,712	$	393,911

	Nine Months Ended September 30, 2025						Nine Months Ended September 30, 2024
	Before Tax Amount		Tax Expense, (Benefit)		Net of Tax Amount		Before Tax Amount		Tax Expense, (Benefit)		Net of Tax Amount
Securities available for sale and transferred securities:
Change in net unrealized gain/loss during the period	$	414,242	$	86,991	$	327,251	$	257,185	$	54,009	$	203,176
Change in net unrealized gain on securities transferred to held to maturity	(521)		(109)		(412)		(466)		(98)		(368)
Reclassification adjustment for net (gains) losses included in net income	14		3		11		(16)		(3)		(13)
Total securities available for sale and transferred securities	413,735		86,885		326,850		256,703		53,908		202,795
Defined-benefit post-retirement benefit plans:
Reclassification adjustment for net amortization of actuarial gain/loss included in net income as a component of net periodic cost (benefit)	929		195		734		1,255		264		991
Total defined-benefit post-retirement benefit plans	929		195		734		1,255		264		991
Total other comprehensive income (loss)	$	414,664	$	87,080	$	327,584	$	257,958	$	54,172	$	203,786

Schedule of Accumulated Other Comprehensive Income (Loss)

Activity in accumulated other comprehensive income (loss), net of tax, was as follows:


	Securities Available For Sale		Defined Benefit Plans		Accumulated Other Comprehensive Income
Balance at January 1, 2025	$	(1,230,828)	$	(21,176)	$	(1,252,004)
Other comprehensive income (loss) before reclassifications	326,839		—		326,839
Reclassification of amounts included in net income	11		734		745
Net other comprehensive income (loss) during period	326,850		734		327,584
Balance at September 30, 2025	$	(903,978)	$	(20,442)	$	(924,420)

Balance at January 1, 2024	$	(1,094,794)	$	(24,425)	$	(1,119,219)
Other comprehensive income (loss) before reclassifications	202,808		—		202,808
Reclassification of amounts included in net income	(13)		991		978
Net other comprehensive income (loss) during period	202,795		991		203,786

Balance at September 30, 2024	$	(891,999)	$	(23,434)	$	(915,433)

CULLEN/FROST BANKERS, INC. 10-Q