International Bancshares Corporation
US ˙ NasdaqGS ˙ US4590441030

SecurityIBOC / International Bancshares Corporation
InstitutionAlps Advisors Inc
Latest Disclosed Ownership7,336 shares
Latest Disclosed Value $ 493,639
Alps Advisors Inc reports 12.41% increase in ownership of IBOC / International Bancshares Corporation

On May 8, 2026 - Alps Advisors Inc filed a 13F-HR form disclosing ownership of 7,336 shares of International Bancshares Corporation (US:IBOC) valued at $493,639 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 6,526 shares of International Bancshares Corporation. This represents a change in shares of 12.41% during the quarter. The current value of the position is $520,856 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 COR COM 459044103 7,336 810 12.41 494 13.86 0.0021
2026-02-12 2025-12-31 13F INTERNATIONAL BANCSHARES COR COM 459044103 6,526 72 1.12 434 -2.26 0.0025
2025-11-05 2025-09-30 13F INTERNATIONAL BANCSHARES COR COM 459044103 6,454 627 10.76 444 14.47 0.0025
2025-08-11 2025-06-30 13F INTERNATIONAL BANCSHARES COR COM 459044103 5,827 70 1.22 388 6.61 0.0022
2025-04-30 2025-03-31 13F INTERNATIONAL BANCSHARES COR COM 459044103 5,757 -52 -0.90 363 -0.82 0.0021
2025-02-13 2024-12-31 13F INTERNATIONAL BANCSHARES COR COM 459044103 5,809 0 0.00 367 5.48 0.0023
2024-11-12 2024-09-30 13F INTERNATIONAL BANCSHARES COR COM 459044103 5,809 -578 -9.05 347 -4.93 0.0023
2024-08-13 2024-06-30 13F INTERNATIONAL BANCSHARES COR COM 459044103 6,387 -31 -0.48 365 1.39 0.0025
2024-05-14 2024-03-31 13F INTERNATIONAL BANCSHARES COR COM 459044103 6,418 -806 -11.16 360 -8.16 0.0026
2024-02-14 2023-12-31 13F INTERNATIONAL BANCSHARES COR COM 459044103 7,224 -411 -5.38 392 18.79 0.0031
2023-11-14 2023-09-30 13F INTERNATIONAL BANCSHARES COR COM 459044103 7,635 585 8.30 331 6.11 0.0027
2023-08-14 2023-06-30 13F INTERNATIONAL BANCSHARES COR COM 459044103 7,050 50 0.71 312 4.01 0.0027
2023-05-10 2023-03-31 13F INTERNATIONAL BANCSHARES COR COM 459044103 7,000 7,000 300 0.0026
2022-11-14 2022-09-30 13F INTERNATIONAL BANCSHARES COR COM 459044103 0 -8,151 -100.00 0 -100.00
2022-08-15 2022-06-30 13F/A-1 INTERNATIONAL BANCSHARES COR COM 459044103 8,151 -84 -1.02 327 -6.03 0.0032
2022-08-11 2022-06-30 13F INTERNATIONAL BANCSHARES COR COM 459044103 8,151 -84 327 0.0031
2022-05-16 2022-03-31 13F INTERNATIONAL BANCSHARES COR COM 459044103 8,235 8,235 348 0.0038
2019-11-04 2019-09-30 13F INTL BANCSHARES COMMON STOCK 459044103 0 -9,585 -100.00 0 -100.00
2019-08-07 2019-06-30 13F INTL BANCSHARES COMMON STOCK 459044103 9,585 -504 -5.00 361 -5.99 0.0027
2019-05-01 2019-03-31 13F INTL BANCSHARES COMMON STOCK 459044103 10,089 10,089 384 0.0027
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.