Debt securities held-to-maturity (Tables)

6 Months Ended

Jun. 30, 2026

Investments, Debt and Equity Securities [Abstract]

Schedule of Debt Securities, Held-to-Maturity

The following tables present the amortized cost, allowance for credit losses, gross unrealized gains and losses, approximate fair value,

weighted average yield and contractual maturities of debt securities held-to-maturity at June 30, 2026 and December 31, 2025.

	At June 30, 2026
(In thousands)	Amortized cost	Book Value [1]	Allowance for Credit Losses	Carrying Value Net of Allowance	Gross unrealized gains	Gross unrealized losses	Fair value	Weighted average yield
U.S. Treasury securities
Within 1 year	$2,550,122	$2,514,507	$-	$2,514,507	$-	$2,273	$2,512,234	1.06%
After 1 to 5 years	3,806,389	3,640,221	-	3,640,221	-	19,074	3,621,147	1.33
Total U.S. Treasury securities	6,356,511	6,154,728	-	6,154,728	-	21,347	6,133,381	1.22
Obligations of Puerto Rico, States and political subdivisions
Within 1 year	2,720	2,720	8	2,712	8	-	2,720	6.45
After 1 to 5 years	3,910	3,910	24	3,886	11	-	3,897	1.84
After 5 to 10 years	450	450	14	436	6	-	442	5.81
After 10 years	34,769	34,769	6,184	28,585	2,465	1,770	29,280	1.43
Total obligations of Puerto Rico, States and political subdivisions	41,849	41,849	6,230	35,619	2,490	1,770	36,339	1.84
Collateralized mortgage obligations - federal agencies
After 10 years	1,483	1,483	-	1,483	-	187	1,296	2.87
Total collateralized mortgage obligations - federal agencies	1,483	1,483	-	1,483	-	187	1,296	2.87
Securities in wholly owned statutory business trusts
After 5 to 10 years	5,960	5,960	-	5,960	-	-	5,960	6.33
Total securities in wholly owned statutory business trusts	5,960	5,960	-	5,960	-	-	5,960	6.33
Total debt securities held-to-maturity [2]	$6,405,803	$6,204,020	$6,230	$6,197,790	$2,490	$23,304	$6,176,976	1.23%

[1]Book value includes $201.8 million of unrealized loss which remains in Accumulated other comprehensive (loss) income (AOCI) related to certain securities

previously transferred from available-for-sale securities portfolio to the held-to-maturity securities portfolio.

[2] Included $6.1 billion pledged to secure public and trust deposits that the secured parties are not permitted to sell or repledge the collateral. The Corporation

had unpledged held-to-maturities securities with a fair value of $99.7 million that could be used to increase its borrowing facilities.

	At December 31, 2025
(In thousands)	Amortized cost	Book Value [1]	Allowance for Credit Losses	Carrying Value Net of Allowance	Gross unrealized gains	Gross unrealized losses	Fair value	Weighted average yield
U.S. Treasury securities
Within 1 year	$2,558,293	$2,519,071	$-	$2,519,071	$5,224	$110	$2,524,185	1.31%
After 1 to 5 years	5,003,219	4,749,896	-	4,749,896	35,910	-	4,785,806	1.27
Total U.S. Treasury securities	7,561,512	7,268,967	-	7,268,967	41,134	110	7,309,991	1.28
Obligations of Puerto Rico, States and political subdivisions
Within 1 year	2,605	2,605	5	2,600	4	-	2,604	6.43
After 1 to 5 years	12,508	12,508	39	12,469	24	87	12,406	3.49
After 5 to 10 years	450	450	15	435	15	-	450	5.81
After 10 years	35,544	35,544	5,753	29,791	2,908	1,829	30,870	1.43
Total obligations of Puerto Rico, States and political subdivisions	51,107	51,107	5,812	45,295	2,951	1,916	46,330	2.22
Collateralized mortgage obligations - federal agencies
After 10 years	1,495	1,495	-	1,495	-	189	1,306	2.87
Total collateralized mortgage obligations - federal agencies	1,495	1,495	-	1,495	-	189	1,306	2.87
Securities in wholly owned statutory business trusts
After 5 to 10 years	5,960	5,960	-	5,960	-	-	5,960	6.33
Total securities in wholly owned statutory business trusts	5,960	5,960	-	5,960	-	-	5,960	6.33
Total debt securities held-to-maturity [2]	$7,620,074	$7,327,529	$5,812	$7,321,717	$44,085	$2,215	$7,363,587	1.29%

[1]Book value includes $293.0 million of unrealized loss which remains in Accumulated other comprehensive (loss) income (AOCI) related to certain securities

transferred from available-for-sale securities portfolio to the held-to-maturity securities portfolio.

[2] Includes $7.3 billion pledged to secure public and trust deposits that the secured parties are not permitted to sell or repledge the collateral. The Corporation

had unpledged held-to-maturities securities with a fair value of $98.8 million that could be used to increase its borrowing facilities.