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Lam Research Corporation

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Lam Research Corporation insider trading

Lam Research Corporation files with the SEC as a Special Industry Machinery, NEC company headquartered in Fremont, CA. Every time one of its executives or directors buys or sells the stock, the filing appears here the moment it reaches the SEC — with grants and option exercises set apart from the trades that cost the insider their own money.

From SEC filings

Recent LRCX insider transactions

6 insiders traded LRCX on the open market between Jun 12, 2026 and Sep 09, 2026 — 24 sales worth $74.9M, of which 23 were pre-scheduled under a 10b5-1 plan.

Bought
—
Sold
$74.9M

23 of 24 on a 10b5-1 plan

Net
−$74.9M
Insiders
6

Open-market purchases (code P) and sales (code S) from Lam Research Corporation's own SEC Form 4 filings. Grants and option exercises are excluded — they are compensation, not decisions. Share counts are derived from the reported value and price. Verify any figure against the original filing before acting on it; this is monitoring, not advice.

Filing history last read from EDGAR on Sep 25, 2026. The live dashboard shows new filings the moment they clear.

Every LRCX Form 4 on SEC.gov

SEC Form 4 data, Q3 2024 to Q2 2026

LRCX insider trading by quarter

Between Jul 01, 2024 and Jun 30, 2026, 9 insiders traded LRCX on the open market: 1 purchase worth $602 and 66 sales worth $132M, 55 of the sales pre-scheduled under a 10b5-1 plan. In the last four quarters alone: 0 purchases and 60 sales ($119M), by 7 insiders.

QuarterBoughtSold
Q2 2026—−$47.7M46 sales · 45 on a plan
Q1 2026—−$29.7M6 sales
Q4 2025—−$41.7M8 sales · 5 on a plan
Q3 2025——
Q2 2025+$6021 buy—
Q1 2025—−$9.9M2 sales · all on a plan
Q4 2024—−$653.7K2 sales · 1 on a plan
Q3 2024—−$2.4M2 sales · all on a plan
Largest purchase
+$602 of LRCX by Harter Ava (Chief Legal Officer) on Apr 08, 2025.
Largest sale
−$18.6M of LRCX by Archer Timothy (President and CEO) on Dec 17, 2025, under a 10b5-1 plan.

Open-market transactions through Jun 30, 2026most recent first

  • Brandt Eric10b5-1

    Director

    −$2.9M

    Jun 12, 2026

    7,700 sh · $372.23

  • Brandt Eric10b5-1

    Director

    −$596.9K

    Jun 12, 2026

    1,600 sh · $373.09

  • Brandt Eric10b5-1

    Director

    −$2.3M

    Jun 11, 2026

    6,592 sh · $347.86

  • Brandt Eric10b5-1

    Director

    −$2.1M

    Jun 11, 2026

    5,717 sh · $362.95

  • Brandt Eric10b5-1

    Director

    −$1.5M

    Jun 11, 2026

    4,334 sh · $348.73

  • Brandt Eric10b5-1

    Director

    −$1.2M

    Jun 11, 2026

    3,644 sh · $342.91

  • Brandt Eric10b5-1

    Director

    −$1.2M

    Jun 11, 2026

    3,442 sh · $346.79

  • Brandt Eric10b5-1

    Director

    −$1.1M

    Jun 11, 2026

    3,208 sh · $344.92

  • Brandt Eric10b5-1

    Director

    −$979.4K

    Jun 11, 2026

    2,832 sh · $345.84

  • Brandt Eric10b5-1

    Director

    −$943.2K

    Jun 11, 2026

    2,604 sh · $362.20

  • Brandt Eric10b5-1

    Director

    −$673.5K

    Jun 11, 2026

    1,880 sh · $358.22

  • Brandt Eric10b5-1

    Director

    −$643.8K

    Jun 11, 2026

    1,895 sh · $339.75

  • Brandt Eric10b5-1

    Director

    −$634K

    Jun 11, 2026

    1,756 sh · $361.05

  • Brandt Eric10b5-1

    Director

    −$588.9K

    Jun 11, 2026

    1,653 sh · $356.27

  • Brandt Eric10b5-1

    Director

    −$530.6K

    Jun 11, 2026

    1,517 sh · $349.79

From SEC's quarterly Form 3, 4 and 5 data sets: code P purchases and code S sales of common stock, by the date the trade happened. Where a fund and the people who control it each report the same block, it is counted once. Trades made in the last days of Q2 2026 but filed after it closed arrive with SEC's next quarterly release.

Lam Research Corporation company record

SEC industry classification
Special Industry Machinery, NEC
Headquarters
Fremont, CA
Incorporated in
DE
Listed on
Nasdaq
SEC Central Index Key
0000707549

Sourced from this company's own SEC submissions record. The industry label is SEC's Standard Industrial Classification, which is more specific than the Technology sector shown above.

After insiders bought LRCX

What the stock actually did in the 90 days following each open-market purchase

Don't check LRCX — let it ping you

Get told the moment an insider moves on LRCX

Pro watches Lam Research Corporation for you and sends a Telegram ping within moments of a Form 4 clearing EDGAR — a C-suite open-market buy, a cluster, a 10b5-1 regime break — long before it reaches the press. Add LRCX to a watchlist, see each mover's benchmark-measured track record and which legendary funds hold it, and read the full filing history instead of the last 72 hours.

Track LRCX on the live dashboardFilings on SEC.gov

The live dashboard is free to open. Alerts, watchlists, full filing history and each mover's benchmark-measured track record are Pro. Monitoring, not advice.

How to read LRCX insider activity

Open-market purchase (code P)
An insider spending their own money at market price. This is the only buy code that reliably carries signal — it is a decision, not compensation.
Grants and option exercises (codes A, M)
Scheduled compensation. Most "insider buying" headlines are really this, which is why InsiderPulse weights it at a fraction of a real purchase.
Cluster buy
Two or more different insiders buying on the open market in the same window. One executive buying can mean anything; three is much harder to explain away.

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This week on the tape: who actually chose to sellThe weekly split of scheduled 10b5-1 selling vs deliberate sales, with the deciders named.

Questions

Are LRCX insiders buying or selling?
Between Jun 12, 2026 and Sep 09, 2026, 6 Lam Research Corporation insiders made no open-market purchases and 24 sales worth $74.9M, a net sale of $74.9M. 23 of the sales were pre-scheduled under a Rule 10b5-1 plan.
How much LRCX stock have insiders bought and sold in the last two years?
Between Jul 01, 2024 and Jun 30, 2026, 9 Lam Research Corporation insiders made 1 open-market purchase worth $602 and 66 sales worth $132M. 55 of the sales were pre-scheduled under a Rule 10b5-1 plan. In the four quarters to Jun 30, 2026: no purchases and 60 sales ($119M). The largest purchase was Harter Ava buying $602 on Apr 08, 2025. The largest sale was Archer Timothy selling $18.6M on Dec 17, 2025.
What was the largest recent LRCX insider trade?
Archer Timothy (President and CEO) sold $11.7M of LRCX stock on Jul 02, 2026 at about $390.01 a share, under a pre-scheduled 10b5-1 plan.
When did an insider last buy LRCX shares?
No open-market purchase by a Lam Research Corporation insider appears in the filings from Jun 12, 2026 to Sep 09, 2026 — every recorded open-market transaction in that period was a sale. Before that, the most recent purchase in SEC's data was Harter Ava buying $602 on Apr 08, 2025.
Where does LRCX insider trading data come from?
From the Form 4 filings Lam Research Corporation's officers, directors and 10% owners must send the SEC within two business days of a trade. Each row on this page links to its original filing on SEC EDGAR. Share grants and option exercises are kept apart from open-market purchases and sales, because only the latter cost the insider their own money.

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