International Bancshares Corporation
US ˙ NasdaqGS ˙ US4590441030

SecurityIBOC / International Bancshares Corporation
InstitutionAmalgamated Bank
Latest Disclosed Ownership23,396 shares
Latest Disclosed Value $ 1,574
Amalgamated Bank reports 2.67% increase in ownership of IBOC / International Bancshares Corporation

On May 8, 2026 - Amalgamated Bank filed a 13F-HR form disclosing ownership of 23,396 shares of International Bancshares Corporation (US:IBOC) valued at $1,574,317 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 5, 2026 disclosing 22,788 shares of International Bancshares Corporation. This represents a change in shares of 2.67% during the quarter. The current value of the position is $1,707,440 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-08 2026-03-31 13F INTERNATIONAL BANCSHARES CRP COM 459044103 23,396 608 2.67 2 0.00 0.0120
2026-02-05 2025-12-31 13F INTERNATIONAL BANCSHARES CRP COM 459044103 22,788 -956 -4.03 2 0.00 0.0109
2025-10-29 2025-09-30 13F INTERNATIONAL BANCSHARES CRP COM 459044103 23,744 202 0.86 2 0.00 0.0117
2025-08-04 2025-06-30 13F INTERNATIONAL BANCSHARES CRP COM 459044103 23,542 -384 -1.60 2 0.00 0.0121
2025-04-25 2025-03-31 13F INTERNATIONAL BANCSHARES CRP COM 459044103 23,926 -644 -2.62 2 0.00 0.0129
2025-02-04 2024-12-31 13F INTERNATIONAL BANCSHARES CRP COM 459044103 24,570 0 0.00 2 0.00 0.0127
2024-10-30 2024-09-30 13F INTERNATIONAL BANCSHARES CRP COM 459044103 24,570 -1,417 -5.45 1 0.00 0.0121
2024-08-12 2024-06-30 13F INTERNATIONAL BANCSHARES CRP COM 459044103 25,987 -2,012 -7.19 1 0.00 0.0127
2024-04-23 2024-03-31 13F INTERNATIONAL BANCSHARES CRP COM 459044103 27,999 -2,693 -8.77 2 0.00 0.0134
2024-02-06 2023-12-31 13F INTERNATIONAL BANCSHARES CRP COM 459044103 30,692 47 0.15 2 0.00 0.0133
2023-11-08 2023-09-30 13F INTERNATIONAL BANCSHARES CRP COM 459044103 30,645 -1,098 -3.46 1 0.00 0.0113
2023-08-11 2023-06-30 13F INTERNATIONAL BANCSHARES CRP COM 459044103 31,743 -1,723 -5.15 1 0.00 0.0114
2023-05-02 2023-03-31 13F INTERNATIONAL BANCSHARES CRP COM 459044103 33,466 -2,216 -6.21 1 0.00 0.0122
2023-02-10 2022-12-31 13F INTERNATIONAL BANCSHARES CRP COM 459044103 35,682 521 1.48 2 -99.93 0.0146
2022-11-09 2022-09-30 13F INTERNATIONAL BANCSHARES CRP COM 459044103 35,161 616 1.78 1,494 7.87 0.0144
2022-08-15 2022-06-30 13F INTERNATIONAL BANCSHARES CRP COM 459044103 34,545 591 1.74 1,385 -3.35 0.0129
2022-08-25 2022-03-31 13F/A-1 INTERNATIONAL BANCSHARES CRP COM 459044103 33,954 -1,595 -4.49 1,433 -4.91 0.0111
2022-06-30 2022-03-31 13F INTERNATIONAL BANCSHARES CRP COM 459044103 33,954 -1,595 1,433 0.0114
2022-02-15 2021-12-31 13F/A-1 INTERNATIONAL BANCSHARES CRP COM 459044103 35,549 181 0.51 1,507 2.31 0.0111
2022-02-15 2021-12-31 13F INTERNATIONAL BANCSHARES CRP COM 459044103 35,549 181 1,507 0.0111
2021-10-29 2021-09-30 13F INTERNATIONAL BANCSHARES CRP COM 459044103 35,368 -5,418 -13.28 1,473 -15.88 0.0124
2021-08-16 2021-06-30 13F INTERNATIONAL BANCSHARES CRP COM 459044103 40,786 35,996 751.48 1,751 688.74 0.0140
2021-05-13 2021-03-31 13F INTERNATIONAL BANCSHARES CRP COM 459044103 4,790 4,790 222 0.0083
2020-08-10 2020-06-30 13F INTERNATIONAL BANCSHARES CRP COM 459044103 0 -9,115 -100.00 0 -100.00
2020-05-13 2020-03-31 13F INTERNATIONAL BANCSHARES CRP COM 459044103 9,115 -307 -3.26 245 -39.66 0.0060
2020-02-13 2019-12-31 13F INTERNATIONAL BANCSHARES CRP COM 459044103 9,422 832 9.69 406 22.29 0.0075
2019-11-13 2019-09-30 13F INTERNATIONAL BANCSHARES CRP COM 459044103 8,590 -197 -2.24 332 0.30 0.0070
2019-08-14 2019-06-30 13F INTERNATIONAL BANCSHARES CRP COM 459044103 8,787 677 8.35 331 7.47 0.0077
2019-05-15 2019-03-31 13F INTERNATIONAL BANCSHARES CRP COM 459044103 8,110 273 3.48 308 14.07 0.0075
2019-02-15 2018-12-31 13F INTERNATIONAL BANCSHARES CRP COM 459044103 7,837 -149 -1.87 270 -24.79 0.0077
2018-11-14 2018-09-30 13F INTERNATIONAL BANCSHARES CRP COM 459044103 7,986 -99 -1.22 359 3.76 0.0089
2018-07-18 2018-06-30 13F INTERNATIONAL BANCSHARES CRP COM 459044103 8,085 301 3.87 346 14.19 0.0085
2018-05-22 2018-03-31 13F INTERNATIONAL BANCSHARES CRP COM 459044103 7,784 -120 -1.52 303 -3.50 0.0080
2018-02-13 2017-12-31 13F INTERNATIONAL BANCSHARES CRP COM 459044103 7,904 518 7.01 314 6.08 0.0085
2017-11-09 2017-09-30 13F INTERNATIONAL BANCSHARES CRP COM 459044103 7,386 -425 -5.44 296 8.03 0.0092
2017-08-10 2017-06-30 13F INTERNATIONAL BANCSHARES CRP COM 459044103 7,811 72 0.93 274 0.00 0.0090
2017-05-12 2017-03-31 13F INTERNATIONAL BANCSHARES CRP COM 459044103 7,739 8 0.10 274 -13.02 0.0136
2017-02-14 2016-12-31 13F INTERNATIONAL BANCSHARES CRP COM 459044103 7,731 877 12.80 315 54.41 0.0142
2016-11-15 2016-09-30 13F/A-1 INTERNATIONAL BANCSHARES CRP COM 459044103 6,854 6,854 204 0.0118
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.