What SEC filings does International Bancshares Corporation submit to the SEC?

International Bancshares Corporation (IBOC) submits several types of SEC filings including Form 4 (insider transactions), Form 144 (proposed insider sales), 8-K reports (material events such as earnings releases, acquisitions, leadership changes), and periodic reports — the 10-Q (quarterly) and 10-K (annual). All filings are publicly available through SEC EDGAR.

What does a Form 4 filing tell me about IBOC?

A Form 4 for IBOC discloses a transaction by a company insider — typically a director, officer, or 10%+ shareholder. It shows the source-reported date, number of shares, price, and updated ownership. These facts do not establish motive or predict future returns.

How do I interpret an 8-K filing from International Bancshares Corporation?

An 8-K signals a material event requiring prompt disclosure. Common triggers include earnings pre-announcements, acquisitions, leadership appointments or departures, credit changes, or regulatory actions. Read the item codes inside the filing to understand exactly what was disclosed before drawing conclusions.

What is the difference between a 10-K and 10-Q for IBOC?

The 10-K is International Bancshares Corporation's annual report with fully audited financial statements, comprehensive MD&A, and complete risk factor disclosures — filed 60–90 days after fiscal year-end. The 10-Q is a lighter quarterly report with unaudited financials filed for the first three quarters. Together they provide a continuous financial picture of the company.

Where can I see all IBOC SEC filings directly on EDGAR?

You can view all historical International Bancshares Corporation filings on the SEC EDGAR company page for IBOC. Each filing card on this page links directly to the original SEC document.

How often does International Bancshares Corporation file with the SEC?

International Bancshares Corporation files one 10-K per year and up to three 10-Qs per year. Form 4 insider transactions must be reported within two business days of each trade, so the frequency depends on how often insiders are buying or selling IBOC shares. 8-K filings occur whenever a material event happens — which can be several times per quarter for an active company.

IBOC SEC Filing News — International Bancshares Corporation

Latest SEC filings for International Bancshares Corporation (IBOC) explained in plain English. Covers insider buying and selling (Form 4), proposed insider sales (Form 144), material company events (8-K), and quarterly & annual reports (10-Q / 10-K). StrongBuyAnalytics provides navigation and brief excerpts or summaries; original filings remain at the SEC/source links and were authored by their filers, not StrongBuyAnalytics. Filing dates shown are source dates. Coverage and detection can be delayed or incomplete because of SEC availability, amendments, parsing, caching, or outages. Latest source filing date shown: 2026-10-06.

International Bancshares Corporation, a multibank financial holding company, engages in the provision of commercial and retail banking services in Texas and the State of Oklahoma. The company accepts checking and saving deposits; and offers commercial, real estate, personal, home improvement, automobile, and other installment and term loans. It also provides international banking services, including letters of credit, commercial and industrial loans, and foreign exchange services. In addition, i…

Sector: Financial Services Industry: Banks - Regional Market Cap: $4.1B CIK: 315709

Total Filings

Bullish Classifications

Bearish Classifications

Insider Transactions

Material Events (8-K)

Periodic Reports

Rule-based classifications for IBOC currently lean bearish. Of the 12 filing records displayed, 1 carry bearish classifications (such as insider sales or negative 8-K disclosures) versus 0 bullish. This does not necessarily signal fundamental deterioration — insiders sell for many reasons — but it is worth monitoring alongside the company's core financial metrics.

IBOC Filing Activity Snapshot 2026-02-26 — 2026-10-06

Insider Transactions (Form 4)

0 buys vs 1 sell

Net insider selling in this period — insiders sell for many reasons beyond conviction.

Largest Form 144 Filing

$720.0K

Norton Larry A (Director) · 2026-05-22

10,000 shares · Form 4

Form 144 Notices

Proposed insider sale filed — Form 144 is a notice of intent, not a confirmed transaction. Actual sales are confirmed via Form 4.

Insider Transactions 1 · Forms 3, 4 and 5

A Form 4 is filed within two business days of a company insider — an officer, a director, or a holder of more than ten percent of the stock — changing their position in the shares. All 1 filing in this group is a Form 4 for International Bancshares Corporation.

The difficulty with reading these filings as a group is that a single form type covers transactions that mean entirely different things. An executive spending their own money to buy stock and an executive having shares withheld to pay tax on a vesting grant both appear as a Form 4. Every filing below is therefore tagged with the nature of the underlying transaction, taken from the transaction code reported on the form itself.

Across the 1 insider filing shown, the breakdown is 1 open-market sale. 1 of them involved a discretionary open-market trade; the rest are compensation and administrative mechanics.

What each transaction type means

Open-market sale ×1: The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.

Form 4 Open-market sale Insider Selling 2026-05-22

IBOC insider Norton Larry A (Director) sold 10,000 shares (~$720.0K)

Norton Larry A, listed as Director at INTERNATIONAL BANCSHARES CORP, reported an open-market sale of 10,000 IBOC shares in a Form 4 filing. This is a confirmed insider sale, not just a proposed sale notice.

The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`S`	Open-market sale	10,000	$72.00	$720.0K

Filing: Form 4 (Insider Transaction) Insider: Norton Larry A (Director) Shares: 10,000 Est. Value: $720.0K

View on SEC EDGAR → Open Filing Document →

Proposed Insider Sales 1 · Form 144

A Form 144 is a notice of intent to sell restricted or control securities. It is not a record that anything was sold. International Bancshares Corporation has 1 such notice in this period.

The distinction matters because a Form 144 is frequently reported as though it were a completed insider sale. The filer may sell all of the shares covered, some of them, or none at all, and there is no obligation to update the notice either way. A sale that is actually executed by an officer or director shows up separately on a Form 4, which is the filing to check before treating a proposed sale as a real one.

Form 144 Proposed Insider Sale 2026-05-21

IBOC Form 144 filed for proposed insider sale by Norton Properties LTD (10,000 shares) ~$720.0K

Norton Properties LTD filed a Form 144 with the SEC indicating intent to sell IBOC (INTERNATIONAL BANCSHARES CORP) shares. Form 144 reflects a proposed sale, not a completed transaction. The actual execution, if any, would typically appear later in a Form 4.

Filing: Form 144 (Proposed Sale Notice) Insider: Norton Properties LTD Shares: 10,000 Est. Value: $720.0K

View on SEC EDGAR → Open Filing Document →

Material Events 7 · Form 8-K

An 8-K reports a material event in the window between scheduled reports. There are 7 in this period for International Bancshares Corporation. Each 8-K names the item number it is filed under, and that number is the fastest way to tell a routine disclosure from a consequential one.

Item 2.02 is an earnings release, Item 5.02 is a change of directors or officers, and Item 1.01 or 2.01 covers a material agreement or a completed acquisition. Item 7.01 and Item 8.01 are the general-purpose disclosure items and carry no fixed meaning on their own.

Form 8-K Material Company Update 2026-10-06