LRCX SEC Filing News — Lam Research Corporation

Latest SEC filings for Lam Research Corporation (LRCX) 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: 2026-09-10.

Lam Research Corporation designs, manufactures, markets, refurbishes, and services semiconductor processing equipment used in the fabrication of integrated circuits in the United States, China, Korea, Taiwan, Japan, Southeast Asia, and Europe. The company offers ALTUS systems to deposit conformal or selective films for tungsten or molybdenum metallization applications; SABRE electrochemical deposition products for copper interconnect transition, which support copper damascene manufacturing; Stri…
Sector: Technology Industry: Semiconductor Equipment & Materials Market Cap: $330.3B CIK: 707549
20
Total Filings
0
Bullish Classifications
14
Bearish Classifications
10
Insider Transactions
2
Material Events (8-K)
1
Periodic Reports
Rule-based classifications for LRCX 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.
LRCX Filing Activity Snapshot 2026-06-15 — 2026-09-10
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
$20.01M
BRANDT ERIC (Director) · 2026-06-15
54,500 shares · Form 4
Form 144 Notices
7
Proposed insider sales filed — Form 144 is a notice of intent, not a confirmed transaction. Actual sales are confirmed via Form 4.
Insider Transactions 10 · 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 10 filings in this group are Form 4s for Lam Research 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 10 insider filings shown, the breakdown is 9 open-market sale and 1 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 ×1
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 2026-09-10

LRCX insider ARCHER TIMOTHY (President and CEO) sold 30,000 shares (~$9.58M)

ARCHER TIMOTHY, listed as President and CEO at LAM RESEARCH CORP, reported an open-market sale of 30,000 LRCX 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
M Option exercise 30,000 $30.03 $901.0K
S Open-market sale 30,000 $319.26 $9.58M
M Option exercise derivative · Employee Stock Option (Right to Buy) 30,000 — —
Filing: Form 4 (Insider Transaction) Insider: ARCHER TIMOTHY (President and CEO) Shares: 30,000 Est. Value: $9.58M
View on SEC EDGAR → Open Filing Document →
Form 4 Open-market sale Insider Selling 2026-09-10

LRCX insider Mayer Bethany (Director) sold 9,557 shares (~$3.01M)

Mayer Bethany, listed as Director at LAM RESEARCH CORP, reported an open-market sale of 9,557 LRCX 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 9,557 $314.74 $3.01M
Filing: Form 4 (Insider Transaction) Insider: Mayer Bethany (Director) Shares: 9,557 Est. Value: $3.01M
View on SEC EDGAR → Open Filing Document →
Form 4 Open-market sale Insider Selling 2026-09-03

LRCX insider Varadarajan Seshasayee (Senior Vice President) sold 59,750 shares (~$17.41M)

Varadarajan Seshasayee, listed as Senior Vice President at LAM RESEARCH CORP, reported an open-market sale of 59,750 LRCX 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 20,000 $291.32 $5.83M
M Option exercise 12,270 $59.88 $734.7K
S Open-market sale 12,270 $291.32 $3.57M
M Option exercise 27,480 $30.03 $825.3K
S Open-market sale 27,480 $291.32 $8.01M
M Option exercise derivative · Employee Stock Option (Right to Buy) 12,270 — —
M Option exercise derivative · Employee Stock Option (Right to Buy) 27,480 — —
Filing: Form 4 (Insider Transaction) Insider: Varadarajan Seshasayee (Senior Vice President) Shares: 59,750 Est. Value: $17.41M
View on SEC EDGAR → Open Filing Document →
Form 4 Open-market sale Insider Selling 2026-09-01

LRCX insider Harter Ava (Chief Legal Officer) sold 5,000 shares (~$1.51M)

Harter Ava, listed as Chief Legal Officer at LAM RESEARCH CORP, reported an open-market sale of 5,000 LRCX 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 5,000 $302.46 $1.51M
Filing: Form 4 (Insider Transaction) Insider: Harter Ava (Chief Legal Officer) Shares: 5,000 Est. Value: $1.51M
View on SEC EDGAR → Open Filing Document →
Form 4 Open-market sale Insider Selling 2026-08-07

LRCX insider ARCHER TIMOTHY (President and CEO) sold 30,000 shares (~$9.00M)

ARCHER TIMOTHY, listed as President and CEO at LAM RESEARCH CORP, reported an open-market sale of 30,000 LRCX 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
M Option exercise 30,000 $30.03 $901.0K
S Open-market sale 30,000 $300.00 $9.00M
M Option exercise derivative · Employee Stock Option (Right to Buy) 30,000 — —
Filing: Form 4 (Insider Transaction) Insider: ARCHER TIMOTHY (President and CEO) Shares: 30,000 Est. Value: $9.00M
View on SEC EDGAR → Open Filing Document →
Form 4 Tax withholding Tax / Compensation Filing 2026-08-06

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

Harter Ava (Chief Legal 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 5,790 $307.42 $1.78M
Filing: Form 4 (Insider Transaction) Insider: Harter Ava (Chief Legal Officer) Shares: 5,790
View on SEC EDGAR → Open Filing Document →
Form 4 Open-market sale Insider Selling 2026-07-14

LRCX insider TALWALKAR ABHIJIT Y (Director) sold 18,282 shares (~$6.12M)

TALWALKAR ABHIJIT Y, listed as Director at LAM RESEARCH CORP, reported an open-market sale of 18,282 LRCX 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 18,282 $335.00 $6.12M
Filing: Form 4 (Insider Transaction) Insider: TALWALKAR ABHIJIT Y (Director) Shares: 18,282 Est. Value: $6.12M
View on SEC EDGAR → Open Filing Document →
Form 4 Open-market sale Insider Selling 2026-07-06

LRCX insider ARCHER TIMOTHY (President and CEO) sold 30,000 shares (~$11.70M)

ARCHER TIMOTHY, listed as President and CEO at LAM RESEARCH CORP, reported an open-market sale of 30,000 LRCX 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
M Option exercise 30,000 $30.03 $901.0K
S Open-market sale 30,000 $390.01 $11.70M
M Option exercise derivative · Employee Stock Option (Right to Buy) 30,000 — —
Filing: Form 4 (Insider Transaction) Insider: ARCHER TIMOTHY (President and CEO) Shares: 30,000 Est. Value: $11.70M
View on SEC EDGAR → Open Filing Document →
Form 4 Open-market sale Insider Selling 2026-06-15

LRCX insider BRANDT ERIC (Director) sold 54,500 shares (~$20.01M)

BRANDT ERIC, listed as Director at LAM RESEARCH CORP, reported an open-market sale of 54,500 LRCX 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 300 $355.71 $106.7K
S Open-market sale 1,393 $357.24 $497.6K
S Open-market sale 1,100 $357.98 $393.8K
S Open-market sale 3,828 $359.08 $1.37M
S Open-market sale 1,906 $360.15 $686.4K
S Open-market sale 819 $361.21 $295.8K
S Open-market sale 2,708 $362.40 $981.4K
S Open-market sale 2,345 $363.33 $852.0K
S Open-market sale 2,300 $364.41 $838.1K
S Open-market sale 1,200 $365.16 $438.2K
S Open-market sale 5,803 $367.01 $2.13M
S Open-market sale 4,030 $368.03 $1.48M
S Open-market sale 4,198 $369.16 $1.55M
S Open-market sale 5,037 $370.27 $1.87M
S Open-market sale 8,233 $371.17 $3.06M
S Open-market sale 7,700 $372.23 $2.87M
S Open-market sale 1,600 $373.09 $596.9K
Filing: Form 4 (Insider Transaction) Insider: BRANDT ERIC (Director) Shares: 54,500 Est. Value: $20.01M
View on SEC EDGAR → Open Filing Document →
Form 4 Open-market sale Insider Selling 2026-06-15

LRCX insider BRANDT ERIC (Director) sold 54,500 shares (~$19.12M)

BRANDT ERIC, listed as Director at LAM RESEARCH CORP, reported an open-market sale of 54,500 LRCX 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 974 $337.56 $328.8K
S Open-market sale 1,083 $338.62 $366.7K
S Open-market sale 1,895 $339.75 $643.8K
S Open-market sale 1,277 $340.68 $435.0K
S Open-market sale 1,070 $341.81 $365.7K
S Open-market sale 3,644 $342.91 $1.25M
S Open-market sale 1,481 $343.96 $509.4K
S Open-market sale 3,208 $344.92 $1.11M
S Open-market sale 2,832 $345.84 $979.4K
S Open-market sale 3,442 $346.79 $1.19M
S Open-market sale 6,592 $347.86 $2.29M
S Open-market sale 4,334 $348.73 $1.51M
S Open-market sale 1,517 $349.79 $530.6K
S Open-market sale 36 $350.77 $12.6K
S Open-market sale 1,172 $353.52 $414.3K
S Open-market sale 1,461 $354.08 $517.3K
S Open-market sale 1,331 $355.50 $473.2K
S Open-market sale 1,653 $356.27 $588.9K
S Open-market sale 1,455 $357.06 $519.5K
S Open-market sale 1,880 $358.22 $673.5K
S Open-market sale 780 $359.24 $280.2K
S Open-market sale 664 $360.24 $239.2K
S Open-market sale 1,756 $361.05 $634.0K
S Open-market sale 2,604 $362.20 $943.2K
S Open-market sale 5,717 $362.95 $2.07M
S Open-market sale 642 $364.00 $233.7K
Filing: Form 4 (Insider Transaction) Insider: BRANDT ERIC (Director) Shares: 54,500 Est. Value: $19.12M
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. Lam Research 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 Proposed Insider Sale 2026-09-09

LRCX Form 144 filed for proposed insider sale by BETHANY MAYER (9,557 shares) ~$3.01M

BETHANY MAYER filed a Form 144 with the SEC indicating intent to sell LRCX (LAM RESEARCH 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: BETHANY MAYER Shares: 9,557 Est. Value: $3.01M
View on SEC EDGAR → Open Filing Document →
Form 144 Large Proposed Insider Sale 2026-09-09

LRCX Form 144 filed for proposed insider sale by ARCHER TIMOTHY (30,000 shares) ~$9.58M

ARCHER TIMOTHY filed a Form 144 with the SEC indicating intent to sell LRCX (LAM RESEARCH 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: ARCHER TIMOTHY Shares: 30,000 Est. Value: $9.58M
View on SEC EDGAR → Open Filing Document →
Form 144 Large Proposed Insider Sale 2026-09-02

LRCX Form 144 filed for proposed insider sale by Varadarajan Seshasayee (59,750 shares) ~$17.41M

Varadarajan Seshasayee filed a Form 144 with the SEC indicating intent to sell LRCX (LAM RESEARCH 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: Varadarajan Seshasayee Shares: 59,750 Est. Value: $17.41M
View on SEC EDGAR → Open Filing Document →
Form 144 Proposed Insider Sale 2026-08-31

LRCX Form 144 filed for proposed insider sale by Harter Ava (5,000 shares) ~$1.51M

Harter Ava filed a Form 144 with the SEC indicating intent to sell LRCX (LAM RESEARCH 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: Harter Ava Shares: 5,000 Est. Value: $1.51M
View on SEC EDGAR → Open Filing Document →
Form 144 Large Proposed Insider Sale 2026-08-06

LRCX Form 144 filed for proposed insider sale by ARCHER TIMOTHY (30,000 shares) ~$9.00M

ARCHER TIMOTHY filed a Form 144 with the SEC indicating intent to sell LRCX (LAM RESEARCH 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: ARCHER TIMOTHY Shares: 30,000 Est. Value: $9.00M
View on SEC EDGAR → Open Filing Document →
Form 144 Large Proposed Insider Sale 2026-07-13

LRCX Form 144 filed for proposed insider sale by TALWALKAR ABHIJIT Y (18,282 shares) ~$6.12M

TALWALKAR ABHIJIT Y filed a Form 144 with the SEC indicating intent to sell LRCX (LAM RESEARCH 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: TALWALKAR ABHIJIT Y Shares: 18,282 Est. Value: $6.12M
View on SEC EDGAR → Open Filing Document →
Form 144 Large Proposed Insider Sale 2026-07-02

LRCX Form 144 filed for proposed insider sale by ARCHER TIMOTHY (30,000 shares) ~$11.70M

ARCHER TIMOTHY filed a Form 144 with the SEC indicating intent to sell LRCX (LAM RESEARCH 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: ARCHER TIMOTHY Shares: 30,000 Est. Value: $11.70M
View on SEC EDGAR → Open Filing Document →
Material Events 2 · Form 8-K

An 8-K reports a material event in the window between scheduled reports. There are 2 in this period for Lam Research 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 2026-08-27

LRCX filed 8-K — material company event

LAM RESEARCH CORP filed an 8-K with the SEC reporting a material event. Summary unavailable — view the original SEC filing for the full text.

Filing: 8-K (Material Event)
View on SEC EDGAR → Open Filing Document →
Form 8-K Material Company Update 2026-07-29

LRCX filed 8-K — material company event

LAM RESEARCH CORP filed an 8-K with the SEC reporting a material event. Summary unavailable — view the original SEC filing for the full text.

Filing: 8-K (Material Event)
View on SEC EDGAR → Open Filing Document →
Periodic Reports 1 · Forms 10-K and 10-Q

The periodic reports are where the audited and reviewed financial statements live. This period contains 1 annual report (10-K) for Lam Research Corporation.

The two are not equivalent in weight. A 10-K is audited by an external firm and includes the full risk factor disclosure, business description and management discussion; a 10-Q is unaudited, reviewed rather than examined, and much shorter. When a figure in a quarterly report is later revised, the annual report is usually where the correction appears.

An amended report — 10-K/A or 10-Q/A — restates or corrects something in the original filing, and is worth reading against the version it replaces.

Form 10-K Annual Report 2026-08-07

LRCX filed Annual Report (10-K)

LAM RESEARCH CORP filed its annual report with the SEC. This report includes audited financial statements, business overview, risk factors, and management discussion.

Filing: 10-K (Annual Report)
View on SEC EDGAR → Open Filing Document →

How we classify Lam Research 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 LRCX. Read these alongside the fundamentals rather than in isolation.

Frequently Asked Questions — LRCX SEC Filings

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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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