International Bancshares Corporation
US ˙ NasdaqGS ˙ US4590441030

SecurityIBOC / International Bancshares Corporation
InstitutionParallel Advisors, LLC
Latest Disclosed Ownership2,107 shares
Latest Disclosed Value $ 139,989
Parallel Advisors, LLC ownership in IBOC / International Bancshares Corporation

On February 11, 2026 - Parallel Advisors, LLC filed a 13F-HR form disclosing ownership of 2,107 shares of International Bancshares Corporation (US:IBOC) valued at $139,989 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 13, 2025 disclosing 2,153 shares of International Bancshares Corporation. This represents a change in shares of -2.14% during the quarter. The current value of the position is $149,597 USD.

Parallel Advisors, LLC has a history of taking positions in derivatives of the underlying security (IBOC) in the form of stock options. The firm currently holds call options representing 0 of underlying shares valued at $0 USD .

Note: prior versions of this page mistakenly stated that the share values represented the number of options, not the number of underlying shares. For more information on the data backing these reports, please see the SEC document Frequently Asked Questions About Form 13F.

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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Institutional Put/Call Ratios
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In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

IBOC / International Bancshares Corporation Historical Put/Call Ratio
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)
2026-02-11 2025-12-31 13F INTERNATIONAL BANCSHARES CORP COM Stock 459044103 2,107 -46 -2.14 140 -6.08 0.0026
2025-11-13 2025-09-30 13F INTERNATIONAL BANCSHARES CORP COM Stock 459044103 2,153 15 0.70 148 4.23 0.0027
2025-07-08 2025-06-30 13F INTERNATIONAL BANCSHARES CORP COM Stock 459044103 2,138 29 1.38 142 7.58 0.0028
2025-04-08 2025-03-31 13F INTERNATIONAL BANCSHARES CORP COM Stock 459044103 2,109 -70 -3.21 133 -3.65 0.0030
2025-02-10 2024-12-31 13F INTERNATIONAL BANCSHARES CORP COM Stock 459044103 2,179 -132 -5.71 138 -0.72 0.0031
2024-11-13 2024-09-30 13F INTERNATIONAL BANCSHARES CORP COM Stock 459044103 2,311 -372 -13.87 138 -9.80 0.0032
2024-08-08 2024-06-30 13F INTERNATIONAL BANCSHARES CORP COM Stock 459044103 2,683 21 0.79 153 2.68 0.0039
2024-05-06 2024-03-31 13F INTERNATIONAL BANCSHARES CORP COM Stock 459044103 2,662 89 3.46 149 7.19 0.0040
2024-02-12 2023-12-31 13F INTERNATIONAL BANCSHARES CORP COM Stock 459044103 2,573 -491 -16.02 140 5.30 0.0041
2024-05-20 2023-09-30 13F/A-1 INTERNATIONAL BANCSHARES CORP COM Stock 459044103 3,064 -1,302 -29.82 133 -31.25 0.0044
2023-11-14 2023-09-30 13F INTERNATIONAL BANCSHARES CORP COM Stock 459044103 3,064 -1,302 133 0.0044
2024-05-20 2023-06-30 13F/A-1 INTERNATIONAL BANCSHARES CORP COM Stock 459044103 4,366 -3,344 -43.37 193 -41.82 0.0062
2023-08-04 2023-06-30 13F INTERNATIONAL BANCSHARES CORP COM Stock 459044103 4,366 -3,344 193 0.0062
2024-05-20 2023-03-31 13F/A-1 INTERNATIONAL BANCSHARES CORP COM Stock 459044103 7,710 -3,227 -29.51 330 -34.00 0.0111
2023-04-25 2023-03-31 13F INTERNATIONAL BANCSHARES CORP COM Stock 459044103 7,710 -3,227 330 0.0111
2023-02-06 2022-12-31 13F INTERNATIONAL BANCSHARES CORP COM Stock 459044103 10,937 1,841 20.24 500 29.20 0.0217
2022-11-10 2022-09-30 13F INTERNATIONAL BANCSHARES CORP COM Stock 459044103 9,096 1,260 16.08 387 23.25 0.0178
2022-08-01 2022-06-30 13F INTERNATIONAL BANCSHARES CORP COM Stock 459044103 7,836 6,963 797.59 314 748.65 0.0144
2022-04-28 2022-03-31 13F INTERNATIONAL BANCSHARES CORP COM Stock 459044103 873 816 1,431.58 37 1,750.00 0.0015
2022-01-20 2021-12-31 13F INTERNATIONAL BANCSHARES CORP COM Stock 459044103 57 7 14.00 2 0.00 0.0001
2021-11-02 2021-09-30 13F/A-1 INTERNATIONAL BANCSHARES CORP COM Stock 459044103 50 -2 -3.85 2 0.00 0.0001
2021-08-06 2021-06-30 13F INTERNATIONAL BANCSHARES CORP COM Stock 459044103 52 14 36.84 2 0.00 0.0001
2021-04-23 2021-03-31 13F INTERNATIONAL BANCSHARES CORP COM Stock 459044103 38 11 40.74 2 100.00 0.0001
2021-02-02 2020-12-31 13F INTERNATIONAL BANCSHARES CORP COM Stock 459044103 27 -40 -59.70 1 -50.00 0.0001
2020-10-27 2020-09-30 13F INTERNATIONAL BANCSHARES CORP COM Stock 459044103 67 40 148.15 2 0.0001
2020-07-16 2020-06-30 13F INTERNATIONAL BANCSHARES CORP COM Stock 459044103 27 -50 -64.94 0 -100.00
2020-04-27 2020-03-31 13F INTERNATIONAL BANCSHARES CORP COM Stock 459044103 77 0 0.00 2 -33.33 0.0002
2020-01-30 2019-12-31 13F INTERNATIONAL BANCSHARES CORP COM Stock 459044103 77 0 0.00 3 0.00 0.0002
2019-11-01 2019-09-30 13F INTERNATIONAL BANCSHARES CORP COM Stock 459044103 77 -87 -53.05 3 -50.00 0.0003
2019-08-05 2019-06-30 13F INTERNATIONAL BANCSHARES CORP COM Stock 459044103 164 0 0.00 6 0.00 0.0006
2019-05-01 2019-03-31 13F INTERNATIONAL BANCSHARES CORP COM Stock 459044103 164 0 0.00 6 20.00 0.0007
2019-02-05 2018-12-31 13F INTERNATIONAL BANCSHARES CORP COM Stock 459044103 164 -186 -53.14 5 -68.75 0.0007
2018-11-01 2018-09-30 13F INTERNATIONAL BANCSHARES CORP COM Stock 459044103 350 47 15.51 16 33.33 0.0020
2018-07-30 2018-06-30 13F INTERNATIONAL BANCSHARES CORP COM Stock 459044103 303 139 84.76 12 100.00 0.0017
2018-05-08 2018-03-31 13F INTERNATIONAL BANCSHARES CORP COM Stock 459044103 164 0 0.00 6 -14.29 0.0009
2018-02-13 2017-12-31 13F INTERNATIONAL BANCSHARES CORP COM Stock 459044103 164 0 0.00 7 16.67 0.0011
2017-11-15 2017-09-30 13F/A-1 INTERNATIONAL BANCSHARES CORP COM Stock 459044103 164 0 0.00 6 0.00 0.0010
2017-08-07 2017-06-30 13F INTERNATIONAL BANCSHARES CORP COM Stock 459044103 164 0 0.00 6 0.00 0.0011
2017-05-12 2017-03-31 13F/A-1 INTERNATIONAL BANCSHARES CORP COM Stock 459044103 164 0 0.00 6 -14.29 0.0012
2017-05-12 2017-03-31 13F INTERNATIONAL BANCSHARES CORP COM Stock 459044103 164 6
2017-02-14 2016-12-31 13F INTERNATIONAL BANCSHARES CORP COM Stock 459044103 164 164 7 0.0016
Disclosed Call Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share
Price
Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2022-01-19 2021-12-31 13F INTERNATIONAL BANCSHARES CORP COM Stock Call 0 -100.00 0 -100.00 n/a n/a n/a
2021-10-22 2021-09-30 13F INTERNATIONAL BANCSHARES CORP COM Stock Call 52 2 n/a n/a n/a
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.