International Bancshares Corporation
US ˙ NasdaqGS ˙ US4590441030

SecurityIBOC / International Bancshares Corporation
InstitutionMorgan Stanley
Latest Disclosed Ownership296,181 shares
Latest Disclosed Value $ 19,930,077
Morgan Stanley reports 1.48% decrease in ownership of IBOC / International Bancshares Corporation

On May 15, 2026 - Morgan Stanley filed a 13F-HR form disclosing ownership of 296,181 shares of International Bancshares Corporation (US:IBOC) valued at $19,930,019 USD as of March 31, 2026. The entity filed a previous 13F-HR/A on May 27, 2026 disclosing 300,642 shares of International Bancshares Corporation. This represents a change in shares of -1.48% during the quarter. The current value of the position is $21,603,442 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)
2026-05-15 2026-03-31 13F INTERNATIONAL BANCSHARES COR COM 459044103 296,181 -4,461 -1.48 19,930 -0.22 0.0012
2026-05-27 2025-12-31 13F/A-1 INTERNATIONAL BANCSHARES COR COM 459044103 300,642 50,688 20.28 19,975 16.24 0.0012
2026-02-13 2025-12-31 13F INTERNATIONAL BANCSHARES COR COM 459044103 300,642 50,688 19,975 0.0012
2026-05-27 2025-09-30 13F/A-1 INTERNATIONAL BANCSHARES COR COM 459044103 249,954 -34,647 -12.17 17,184 -9.29 0.0010
2025-11-14 2025-09-30 13F INTERNATIONAL BANCSHARES COR COM 459044103 249,954 -34,647 17,184 0.0010
2025-08-15 2025-06-30 13F INTERNATIONAL BANCSHARES COR COM 459044103 284,601 8,598 3.12 18,943 8.84 0.0012
2025-05-15 2025-03-31 13F INTERNATIONAL BANCSHARES COR COM 459044103 276,003 -91,990 -25.00 17,405 -25.12 0.0012
2025-05-15 2024-12-31 13F/A-1 INTERNATIONAL BANCSHARES COR COM 459044103 367,993 -31,695 -7.93 23,242 -2.74 0.0016
2025-02-14 2024-12-31 13F INTERNATIONAL BANCSHARES COR COM 459044103 367,993 -31,695 23,242 0.0016
2025-05-14 2024-09-30 13F/A-2 INTERNATIONAL BANCSHARES COR COM 459044103 399,688 -87,577 -17.97 23,897 -14.27 0.0017
2025-02-14 2024-09-30 13F/A-1 INTERNATIONAL BANCSHARES COR COM 459044103 399,688 -87,577 23,897 0.0017
2024-11-14 2024-09-30 13F INTERNATIONAL BANCSHARES COR COM 459044103 399,688 -87,577 23,897 0.0002
2025-05-14 2024-06-30 13F/A-2 INTERNATIONAL BANCSHARES COR COM 459044103 487,265 136,451 38.90 27,877 41.55 0.0022
2024-10-17 2024-06-30 13F/A-1 INTERNATIONAL BANCSHARES COR COM 459044103 487,265 136,451 27,877 0.0022
2024-08-14 2024-06-30 13F INTERNATIONAL BANCSHARES COR COM 459044103 487,265 136,451 27,877 0.0022
2024-10-17 2024-03-31 13F/A-2 INTERNATIONAL BANCSHARES COR COM 459044103 350,814 -45,756 -11.54 19,695 -8.57 0.0016
2024-08-16 2024-03-31 13F/A-1 INTERNATIONAL BANCSHARES COR COM 459044103 350,814 -45,756 19,695 0.0002
2024-05-15 2024-03-31 13F INTERNATIONAL BANCSHARES COR COM 459044103 350,814 -45,756 19,695 0.0016
2024-08-16 2023-12-31 13F/A-1 INTERNATIONAL BANCSHARES COR COM 459044103 396,570 158,986 66.92 21,542 109.22 0.0019
2024-02-13 2023-12-31 13F INTERNATIONAL BANCSHARES COR COM 459044103 396,570 158,986 21,542 0.0019
2023-11-15 2023-09-30 13F INTERNATIONAL BANCSHARES COR COM 459044103 237,584 5,586 2.41 10,297 0.41 0.0010
2023-08-14 2023-06-30 13F INTERNATIONAL BANCSHARES COR COM 459044103 231,998 17,163 7.99 10,254 11.47 0.0010
2023-05-15 2023-03-31 13F INTERNATIONAL BANCSHARES COR COM 459044103 214,835 -253 -0.12 9,199 -6.53 0.0010
2023-02-14 2022-12-31 13F INTERNATIONAL BANCSHARES COR COM 459044103 215,088 -18,879 -8.07 9,842 -1.03 0.0011
2022-11-14 2022-09-30 13F INTERNATIONAL BANCSHARES COR COM 459044103 233,967 30,145 14.79 9,944 21.71 0.0014
2022-10-27 2022-06-30 13F/A-1 INTERNATIONAL BANCSHARES COR COM 459044103 203,822 40,662 24.92 8,170 18.65 0.0011
2022-08-15 2022-06-30 13F INTERNATIONAL BANCSHARES COR COM 459044103 203,822 40,662 8,170 0.0002
2022-10-27 2022-03-31 13F/A-1 INTERNATIONAL BANCSHARES COR COM 459044103 163,160 52,962 48.06 6,886 47.39 0.0009
2022-05-13 2022-03-31 13F INTERNATIONAL BANCSHARES COR COM 459044103 163,160 52,962 6,886 0.0009
2022-02-14 2021-12-31 13F INTERNATIONAL BANCSHARES COR COM 459044103 110,198 -23,216 -17.40 4,672 -15.91 0.0006
2021-11-15 2021-09-30 13F INTERNATIONAL BANCSHARES COR COM 459044103 133,414 30,975 30.24 5,556 26.30 0.0007
2021-08-23 2021-06-30 13F/A-1 INTERNATIONAL BANCSHARES COR COM 459044103 102,439 31,268 43.93 4,399 33.14 0.0006
2021-08-16 2021-06-30 13F INTERNATIONAL BANCSHARES COR COM 459044103 102,439 31,268 4,399 0.0001
2021-05-17 2021-03-31 13F INTERNATIONAL BANCSHARES COR COM 459044103 71,171 -56,483 -44.25 3,304 -30.86 0.0005
2021-02-16 2020-12-31 13F INTERNATIONAL BANCSHARES COR COM 459044103 127,654 10,540 9.00 4,779 56.59 0.0007
2020-11-13 2020-09-30 13F INTERNATIONAL BANCSHARES COR COM 459044103 117,114 44,761 61.86 3,052 31.67 0.0006
2020-08-14 2020-06-30 13F INTERNATIONAL BANCSHARES COR COM 459044103 72,353 12,041 19.96 2,318 42.91 0.0005
2020-05-26 2020-03-31 13F/A-1 INTERNATIONAL BANCSHARES COR COM 459044103 60,312 -99,566 -62.28 1,622 -76.44 0.0004
2020-05-15 2020-03-31 13F INTERNATIONAL BANCSHARES COR COM 459044103 60,312 -99,566 1,622 124.6034
2020-02-14 2019-12-31 13F INTERNATIONAL BANCSHARES COR COM 459044103 159,878 90,222 129.53 6,886 155.99 0.0016
2019-11-14 2019-09-30 13F INTERNATIONAL BANCSHARES COR COM 459044103 69,656 -6,896 -9.01 2,690 -6.82 0.0007
2019-08-14 2019-06-30 13F INTERNATIONAL BANCSHARES COR COM 459044103 76,552 9,874 14.81 2,887 13.80 0.0008
2019-05-15 2019-03-31 13F INTERNATIONAL BANCSHARES COR COM 459044103 66,678 -81,281 -54.93 2,537 -50.15 0.0007
2019-02-14 2018-12-31 13F INTERNATIONAL BANCSHARES COR COM 459044103 147,959 -163,571 -52.51 5,089 -63.70 0.0015
2019-04-23 2018-09-30 13F/A-2 INTERNATIONAL BANCSHARES COR COM 459044103 311,530 77,231 32.96 14,018 39.79 0.0035
2018-11-20 2018-09-30 13F/A-1 INTERNATIONAL BANCSHARES COR COM 459044103 311,530 0 14,018 0.0035
2018-11-14 2018-09-30 13F INTERNATIONAL BANCSHARES COR COM 459044103 311,530 77,231 14,018
2019-04-23 2018-06-30 13F/A-1 INTERNATIONAL BANCSHARES COR COM 459044103 234,299 -116,754 -33.26 10,028 -26.57 0.0027
2018-08-14 2018-06-30 13F INTERNATIONAL BANCSHARES COR COM 459044103 234,299 -116,754 10,028
2019-04-23 2018-03-31 13F/A-1 INTERNATIONAL BANCSHARES COR COM 459044103 351,053 7,906 2.30 13,656 0.26 0.0038
2018-05-14 2018-03-31 13F INTERNATIONAL BANCSHARES COR COM 459044103 351,053 7,906 13,656
2019-04-23 2017-12-31 13F/A-1 INTERNATIONAL BANCSHARES COR COM 459044103 343,147 105,998 44.70 13,621 43.24 0.0037
2018-02-14 2017-12-31 13F INTERNATIONAL BANCSHARES COR COM 459044103 343,147 105,998 13,621
2017-11-14 2017-09-30 13F INTERNATIONAL BANCSHARES COR COM 459044103 237,149 -105,686 -30.83 9,509 -20.86 0.0028
2017-08-11 2017-06-30 13F INTERNATIONAL BANCSHARES COR COM 459044103 342,835 4,690 1.39 12,016 0.38 0.0036
2017-05-22 2017-03-31 13F/A-1 INTERNATIONAL BANCSHARES COR COM 459044103 338,145 -25,278 -6.96 11,970 -19.27 0.0037
2017-05-12 2017-03-31 13F INTERNATIONAL BANCSHARES COR COM 459044103 338,145 11,970
2017-02-22 2016-12-31 13F/A-1 INTERNATIONAL BANCSHARES COR COM 459044103 363,423 212,996 141.59 14,828 230.98 0.0049
2017-02-13 2016-12-31 13F INTERNATIONAL BANCSHARES COR COM 459044103 363,423 14,828
2016-11-10 2016-09-30 13F INTERNATIONAL BANCSHARES COR COM 459044103 150,427 96,949 181.29 4,480 220.92 0.0015
2016-08-12 2016-06-30 13F INTERNATIONAL BANCSHARES COR COM 459044103 53,478 35,313 194.40 1,396 211.61 0.0005
2016-05-12 2016-03-31 13F INTERNATIONAL BANCSHARES COR COM 459044103 18,165 -33,661 -64.95 448 -66.37 0.0002
2016-02-09 2015-12-31 13F INTERNATIONAL BANCSHARES COR COM 459044103 51,826 -99,727 -65.80 1,332 -64.88 0.0005
2016-02-08 2015-09-30 13F/A-1 INTERNATIONAL BANCSHARES COR COM 459044103 151,553 -115,441 -43.24 3,793 -47.14 0.0014
2015-11-09 2015-09-30 13F INTERNATIONAL BANCSHARES COR COM 459044103 151,553 3,793
2015-08-12 2015-06-30 13F INTERNATIONAL BANCSHARES COR COM 459044103 266,994 72,674 37.40 7,175 41.85 0.0025
2015-05-14 2015-03-31 13F INTERNATIONAL BANCSHARES COR COM 459044103 194,320 -31,887 -14.10 5,058 -15.76 0.0019
2015-02-13 2014-12-31 13F INTERNATIONAL BANCSHARES COR COM 459044103 226,207 2,897 1.30 6,004 9.02 0.0022
2014-12-16 2014-09-30 13F/A-1 INTERNATIONAL BANCSHARES COR COM 459044103 223,310 806 0.36 5,507 -1.29 0.0021
2014-11-14 2014-09-30 13F INTERNATIONAL BANCSHARES COR COM 459044103 223,310 5,507
2014-05-13 2014-03-31 13F INTERNATIONAL BANCSHARES COR COM 459044103 222,504 83,576 60.16 5,579 52.31 0.0023
2014-02-13 2013-12-31 13F INTERNATIONAL BANCSHARES COR COM 459044103 138,928 120,857 668.79 3,663 836.83 0.0016
2013-11-13 2013-09-30 13F INTERNATIONAL BANCSHARES COM 459044103 18,071 -3,681 -16.92 391 -20.37 0.0002
2013-08-08 2013-06-30 13F INTERNATIONAL BANCSHARES COM 459044103 21,752 21,752 491 0.0002
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.