What SEC filings does KLA Corporation submit to the SEC?

KLA Corporation (KLAC) 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 KLAC?

A Form 4 for KLAC 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 KLA 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 KLAC?

The 10-K is KLA 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 KLAC SEC filings directly on EDGAR?

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

How often does KLA Corporation file with the SEC?

KLA 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 KLAC shares. 8-K filings occur whenever a material event happens — which can be several times per quarter for an active company.

KLAC SEC Filing News — KLA Corporation

Latest SEC filings for KLA Corporation (KLAC) 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: 2026-09-16.

KLA Corporation, together with its subsidiaries, provides process control and process-enabling solutions for manufacturing wafers, reticles/masks, chemicals/materials, integrated circuits (ICs), packaged ICs, and printed circuit boards. It operates through three segments: Semiconductor Process Control; Specialty Semiconductor Process; and PCB and Component Inspection. The company offers inspection and review tools to identify, locate, characterize, review, and analyze defects on various surfaces…

Sector: Technology Industry: Semiconductor Equipment & Materials Market Cap: $216.3B CIK: 319201

Total Filings

Bullish Classifications

Bearish Classifications

Insider Transactions

Material Events (8-K)

Periodic Reports

Rule-based classifications for KLAC currently lean bearish. Of the 20 filing records displayed, 14 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.

KLAC Filing Activity Snapshot 2026-08-10 — 2026-09-16

Insider Transactions (Form 4)

0 buys vs 9 sells

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

Largest Form 144 Filing

$17.42M

WALLACE RICHARD P · 2026-08-11

87,568 shares · Form 144

Form 144 Notices

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

Insider Transactions 13 · 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 13 filings in this group are Form 4s for KLA 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 13 insider filings shown, the breakdown is 9 open-market sale and 4 tax withholding. 9 of them involved a discretionary open-market trade; the rest are compensation and administrative mechanics.

What each transaction type means

Open-market sale ×9: 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.
Tax withholding ×4: Shares were withheld by the company to settle tax due when equity vested. This is an automatic administrative step and not a decision to sell.

Form 4 Open-market sale Insider Selling 2026-09-16

KLAC insider WALLACE RICHARD P (President and CEO) sold 72,019 shares (~$12.38M)

WALLACE RICHARD P, listed as President and CEO at KLA CORP, reported an open-market sale of 72,019 KLAC 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	72,019	$171.88	$12.38M

Filing: Form 4 (Insider Transaction) Insider: WALLACE RICHARD P (President and CEO) Shares: 72,019 Est. Value: $12.38M

View on SEC EDGAR → Open Filing Document →

Form 4 Open-market sale Insider Selling 2026-08-14

KLAC insider Lorig Brian (EVP, KLA Global Services) sold 59,586 shares (~$12.40M)

Lorig Brian, listed as EVP, KLA Global Services at KLA CORP, reported an open-market sale of 59,586 KLAC 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	59,586	$208.13	$12.40M

Filing: Form 4 (Insider Transaction) Insider: Lorig Brian (EVP, KLA Global Services) Shares: 59,586 Est. Value: $12.40M

View on SEC EDGAR → Open Filing Document →

Form 4 Open-market sale Insider Selling 2026-08-13

KLAC insider Higgins Bren D. (EVP & Chief Financial Officer) sold 31,500 shares (~$6.61M)

Higgins Bren D., listed as EVP & Chief Financial Officer at KLA CORP, reported an open-market sale of 31,500 KLAC 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	31,500	$209.87	$6.61M

Filing: Form 4 (Insider Transaction) Insider: Higgins Bren D. (EVP & Chief Financial Officer) Shares: 31,500 Est. Value: $6.61M

View on SEC EDGAR → Open Filing Document →

Form 4 Open-market sale Insider Selling 2026-08-12

KLAC insider Khan Ahmad A. (President, Semi. Prod. & Cust.) sold 33,180 shares (~$6.60M)

Khan Ahmad A., listed as President, Semi. Prod. & Cust. at KLA CORP, reported an open-market sale of 33,180 KLAC 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	33,180	$198.95	$6.60M

Filing: Form 4 (Insider Transaction) Insider: Khan Ahmad A. (President, Semi. Prod. & Cust.) Shares: 33,180 Est. Value: $6.60M

View on SEC EDGAR → Open Filing Document →

Form 4 Open-market sale Insider Selling 2026-08-12

KLAC insider WALLACE RICHARD P (President and CEO) sold 87,568 shares (~$17.42M)

WALLACE RICHARD P, listed as President and CEO at KLA CORP, reported an open-market sale of 87,568 KLAC 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	87,568	$198.95	$17.42M

Filing: Form 4 (Insider Transaction) Insider: WALLACE RICHARD P (President and CEO) Shares: 87,568 Est. Value: $17.42M

View on SEC EDGAR → Open Filing Document →

Form 4 Open-market sale Insider Selling 2026-08-11

KLAC insider Kirloskar Virendra A (SVP & Chief Accounting Officer) sold 529 shares (~$108.2K)

Kirloskar Virendra A, listed as SVP & Chief Accounting Officer at KLA CORP, reported an open-market sale of 529 KLAC 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	529	$204.56	$108.2K

Filing: Form 4 (Insider Transaction) Insider: Kirloskar Virendra A (SVP & Chief Accounting Officer) Shares: 529 Est. Value: $108.2K

View on SEC EDGAR → Open Filing Document →

Form 4 Open-market sale Insider Selling 2026-08-11

KLAC insider Wilkinson Mary Beth (EVP, CLO and Secretary) sold 1,661 shares (~$339.8K)

Wilkinson Mary Beth, listed as EVP, CLO and Secretary at KLA CORP, reported an open-market sale of 1,661 KLAC 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	1,661	$204.56	$339.8K

Filing: Form 4 (Insider Transaction) Insider: Wilkinson Mary Beth (EVP, CLO and Secretary) Shares: 1,661 Est. Value: $339.8K

View on SEC EDGAR → Open Filing Document →

Form 4 Tax withholding Tax / Compensation Filing 2026-08-10

KLAC insider Form 4 filed for equity award, exercise, or tax withholding

WALLACE RICHARD P (President and CEO) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were withheld by the company to settle tax due when equity vested. This is an automatic administrative step and not a decision to sell.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`F`	Tax withholding on vested shares	12,761	$193.22	$2.47M

Filing: Form 4 (Insider Transaction) Insider: WALLACE RICHARD P (President and CEO) Shares: 12,761

View on SEC EDGAR → Open Filing Document →

Form 4 Tax withholding Tax / Compensation Filing 2026-08-10

KLAC insider Form 4 filed for equity award, exercise, or tax withholding

Lorig Brian (EVP, KLA Global Services) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were withheld by the company to settle tax due when equity vested. This is an automatic administrative step and not a decision to sell.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`F`	Tax withholding on vested shares	2,875	$193.22	$555.5K

Filing: Form 4 (Insider Transaction) Insider: Lorig Brian (EVP, KLA Global Services) Shares: 2,875

View on SEC EDGAR → Open Filing Document →

Form 4 Open-market sale Insider Selling 2026-08-10

KLAC insider Wilkinson Mary Beth (EVP, CLO and Secretary) sold 21,831 shares (~$4.31M)

Wilkinson Mary Beth, listed as EVP, CLO and Secretary at KLA CORP, reported an open-market sale of 21,831 KLAC 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
`F`	Tax withholding on vested shares	1,208	$193.22	$233.4K
`S`	Open-market sale	21,831	$197.57	$4.31M

Filing: Form 4 (Insider Transaction) Insider: Wilkinson Mary Beth (EVP, CLO and Secretary) Shares: 21,831 Est. Value: $4.31M

View on SEC EDGAR → Open Filing Document →

Form 4 Tax withholding Tax / Compensation Filing 2026-08-10

KLAC insider Form 4 filed for equity award, exercise, or tax withholding

Khan Ahmad A. (President, Semi. Prod. & Cust.) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were withheld by the company to settle tax due when equity vested. This is an automatic administrative step and not a decision to sell.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`F`	Tax withholding on vested shares	4,531	$193.22	$875.5K

Filing: Form 4 (Insider Transaction) Insider: Khan Ahmad A. (President, Semi. Prod. & Cust.) Shares: 4,531

View on SEC EDGAR → Open Filing Document →

Form 4 Tax withholding Tax / Compensation Filing 2026-08-10

KLAC insider Form 4 filed for equity award, exercise, or tax withholding

Higgins Bren D. (EVP & Chief Financial Officer) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were withheld by the company to settle tax due when equity vested. This is an automatic administrative step and not a decision to sell.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`F`	Tax withholding on vested shares	4,531	$193.22	$875.5K

Filing: Form 4 (Insider Transaction) Insider: Higgins Bren D. (EVP & Chief Financial Officer) Shares: 4,531

View on SEC EDGAR → Open Filing Document →

Form 4 Open-market sale Insider Selling 2026-08-10

KLAC insider Kirloskar Virendra A (SVP & Chief Accounting Officer) sold 2,405 shares (~$475.2K)

Kirloskar Virendra A, listed as SVP & Chief Accounting Officer at KLA CORP, reported an open-market sale of 2,405 KLAC 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
`F`	Tax withholding on vested shares	520	$193.22	$100.5K
`S`	Open-market sale	2,405	$197.57	$475.2K

Filing: Form 4 (Insider Transaction) Insider: Kirloskar Virendra A (SVP & Chief Accounting Officer) Shares: 2,405 Est. Value: $475.2K

View on SEC EDGAR → Open Filing Document →

Proposed Insider Sales 7 · 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. KLA Corporation has 7 such notices 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 Large Proposed Insider Sale 2026-09-15

KLAC Form 144 filed for proposed insider sale by WALLACE RICHARD P (72,019 shares) ~$12.38M

WALLACE RICHARD P filed a Form 144 with the SEC indicating intent to sell KLAC (KLA 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. The proposed dollar value is large enough to merit attention.

Filing: Form 144 (Proposed Sale Notice) Insider: WALLACE RICHARD P Shares: 72,019 Est. Value: $12.38M

View on SEC EDGAR → Open Filing Document →

Form 144 Large Proposed Insider Sale 2026-08-13

KLAC Form 144 filed for proposed insider sale by Lorig Brian (59,586 shares) ~$12.40M

Lorig Brian filed a Form 144 with the SEC indicating intent to sell KLAC (KLA 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. The proposed dollar value is large enough to merit attention.

Filing: Form 144 (Proposed Sale Notice) Insider: Lorig Brian Shares: 59,586 Est. Value: $12.40M

View on SEC EDGAR → Open Filing Document →

Form 144 Large Proposed Insider Sale 2026-08-12

KLAC Form 144 filed for proposed insider sale by Higgins Bren D. (31,500 shares) ~$6.61M

Higgins Bren D. filed a Form 144 with the SEC indicating intent to sell KLAC (KLA 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. The proposed dollar value is large enough to merit attention.

Filing: Form 144 (Proposed Sale Notice) Insider: Higgins Bren D. Shares: 31,500 Est. Value: $6.61M

View on SEC EDGAR → Open Filing Document →

Form 144 Large Proposed Insider Sale 2026-08-11

KLAC Form 144 filed for proposed insider sale by Khan Ahmad A. (33,180 shares) ~$6.60M

Khan Ahmad A. filed a Form 144 with the SEC indicating intent to sell KLAC (KLA 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. The proposed dollar value is large enough to merit attention.

Filing: Form 144 (Proposed Sale Notice) Insider: Khan Ahmad A. Shares: 33,180 Est. Value: $6.60M

View on SEC EDGAR → Open Filing Document →

Form 144 Large Proposed Insider Sale 2026-08-11

KLAC Form 144 filed for proposed insider sale by WALLACE RICHARD P (87,568 shares) ~$17.42M

Filing: Form 144 (Proposed Sale Notice) Insider: WALLACE RICHARD P Shares: 87,568 Est. Value: $17.42M

View on SEC EDGAR → Open Filing Document →

Form 144 Proposed Insider Sale 2026-08-10

KLAC Form 144 filed for proposed insider sale by Wilkinson Mary Beth (1,661 shares) ~$339.8K

Wilkinson Mary Beth filed a Form 144 with the SEC indicating intent to sell KLAC (KLA 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: Wilkinson Mary Beth Shares: 1,661 Est. Value: $339.8K

View on SEC EDGAR → Open Filing Document →

Form 144 Proposed Insider Sale 2026-08-10

KLAC Form 144 filed for proposed insider sale by Kirloskar Virendra A (529 shares) ~$108.2K

Kirloskar Virendra A filed a Form 144 with the SEC indicating intent to sell KLAC (KLA 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: Kirloskar Virendra A Shares: 529 Est. Value: $108.2K

View on SEC EDGAR → Open Filing Document →

How we classify KLA Corporation's filings

Straight from EDGAR

Each displayed record links to an original source document. StrongBuyAnalytics provides navigation and brief excerpts or summaries, not the filing itself. Parsing may omit context or contain errors, so read the original document in full.

Transaction codes, not guesswork

The nature shown on each insider filing comes from the transaction code the filer entered on the form itself — P for an open-market purchase, A for a compensation award, F for shares withheld to pay tax, M for an option exercise. Where one filing contains several codes, the transaction table lists them line by line.

Why the distinction matters

Insider activity is routinely summarised as buying or selling, which flattens together decisions that mean very different things. Shares withheld for tax on a vesting grant are an automatic administrative step; shares bought on the open market are someone committing their own money at the current price.

What this page does not tell you

A filing records what happened, not why. Form 4 does not always disclose whether a sale was executed under a pre-arranged Rule 10b5-1 plan, and no single filing is a basis for a decision on KLAC. Read these alongside the fundamentals rather than in isolation.

Frequently Asked Questions — KLAC SEC Filings

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KLAC Full Analysis

Publisher, sources & limitations — September 15, 2026. StrongBuyAnalytics provides navigation and brief excerpts or summaries for educational use. Original filings remain at SEC EDGAR or other displayed source links; StrongBuyAnalytics does not author them. Filing dates are source dates, not publication dates for this page. Coverage can be delayed, incomplete, amended, or unavailable because of SEC/source availability, parsing, caching, or outages. Verify every material statement in the original filing.

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