SEC Form 4
Lam Research Corp (LRCX) insider trading
In the 12 months to Oct 24, 2026, 8 LRCX insiders reported open-market sales of $170.1M across 22 filings; no open-market purchases were filed.
Latest filing · Last 12 months · Source: SEC EDGAR · How we count
- Open-market sales
- $170.1M
- 22 filings · 8 insiders
- Open-market purchases
- $0
- 0 filings
- Pre-arranged sales (10b5-1)
- 13 of 22
- $128.4M of $170.1M sold (75%)
Who traded LRCX, and when
- Sale
- Sale, pre-arranged (10b5-1)
LRCX daily close from Oct 24, 2025 to Oct 23, 2026, between $139.59 and $433.33, last $230.10. 22 sale and 0 purchase filings by 8 insiders, marked at their filing dates. Timothy Archer, President and CEO: sold $57.0M across 4 filings, first filed Dec 18, 2025, last Sep 10, 2026. Eric Brandt, Director: sold $47.0M across 3 filings, first filed Feb 9, 2026, last Jun 15, 2026. Douglas R. Bettinger, Chief Financial Officer & EVP: sold $26.5M across 3 filings, first filed Nov 17, 2025, last Mar 5, 2026. Seshasayee Varadarajan, Senior Vice President: sold $17.4M across 1 filing, first filed Sep 3, 2026, last Sep 3, 2026. Neil J. Fernandes, Senior Vice President: sold $7.0M across 2 filings, first filed May 4, 2026, last Jun 2, 2026. Abhijit Y. Talwalkar, Director: sold $6.1M across 1 filing, first filed Jul 14, 2026, last Jul 14, 2026. 2 others: sold $9.0M across 8 filings, first filed Oct 28, 2025, last Sep 10, 2026.
Largest mark · tap a row for others
Eric Brandt · Director
Filing 1 of 2 within a week · $39,129,706 total
Sale $19,118,360
54,500 shares at $350.80 avg
Filed Jun 15, 2026 · traded Jun 11
Pre-arranged (10b5-1) · close on filing date $388.92
Timothy Archer · President and CEO
President and CEO
$57.0M soldEric Brandt · Director
Director
$47.0M soldDouglas R. Bettinger · Chief Financial Officer & EVP
Chief Financial Officer & EVP
$26.5M soldSeshasayee Varadarajan · Senior Vice President
Senior Vice President
$17.4M soldNeil J. Fernandes · Senior Vice President
Senior Vice President
$7.0M soldAbhijit Y. Talwalkar · Director
Director
$6.1M sold2 others
Combined, one mark per week
$9.0M soldHas Lam Research Corp's CEO sold stock?
Yes. Timothy Archer (CEO) sold 253,300 shares ($57.0M) between Dec 2025 and Sep 2026, all under a pre-arranged 10b5-1 plan.
Open-market trades
22 filings in the last 12 months| Insider | Role | Sold | Bought | Filings | Pre-arranged (10b5-1) | Last filed |
|---|---|---|---|---|---|---|
| Timothy Archer | President and CEO | $57.0M | — | 4 | 100% of sales | |
| Eric Brandt | Director | $47.0M | — | 3 | 83% of sales | |
| Douglas R. Bettinger | Chief Financial Officer & EVP | $26.5M | — | 3 | — | |
| Seshasayee Varadarajan | Senior Vice President | $17.4M | — | 1 | 100% of sales | |
| Neil J. Fernandes | Senior Vice President | $7.0M | — | 2 | 100% of sales | |
| Abhijit Y. Talwalkar | Director | $6.1M | — | 1 | 100% of sales | |
| Ava Harter | Chief Legal Officer | $5.7M | — | 5 | 26% of sales | |
| Bethany Mayer | Director | $3.2M | — | 3 | 7% of sales |
| Filed | Insider | Type | Shares | Avg price | Value | Held after | Source |
|---|---|---|---|---|---|---|---|
traded | Timothy Archer President and CEO | SalePre-arranged (10b5-1) | 30,000 | $319.26 | $9.6M | 1,075,966 | |
traded | Bethany Mayer Director | Sale | 9,557 | $314.74 | $3.0M | 20,995 | |
traded | Seshasayee Varadarajan Senior Vice President | SalePre-arranged (10b5-1) | 59,750 | $291.32 | $17.4M | 205,546 | |
traded | Ava Harter Chief Legal Officer | SalePre-arranged (10b5-1) | 5,000 | $302.46 | $1.5M | 42,462 | |
traded | Timothy Archer President and CEO | SalePre-arranged (10b5-1) | 30,000 | $300.00 | $9.0M | 1,075,966 | |
traded | Abhijit Y. Talwalkar Director | SalePre-arranged (10b5-1) | 18,282 | $335.00 | $6.1M | 87,142 | |
traded | Timothy Archer President and CEO | SalePre-arranged (10b5-1) | 30,000 | $390.01 | $11.7M | 1,075,966 | |
traded | Eric Brandt Director | SalePre-arranged (10b5-1) | 54,500 | $350.80 | $19.1M | 252,731 | |
traded | Eric Brandt Director | SalePre-arranged (10b5-1) | 54,500 | $367.18 | $20.0M | 187,151 | |
traded | Neil J. Fernandes Senior Vice President | SalePre-arranged (10b5-1) | 7,659 | $309.60 | $2.4M | 58,470 | |
traded | Neil J. Fernandes Senior Vice President | SalePre-arranged (10b5-1) | 18,170 | $255.14 | $4.6M | 66,129 | |
traded | Ava Harter Chief Legal Officer | Sale | 6,010 | $258.66 | $1.6M | 53,205 | |
traded | Douglas R. Bettinger Chief Financial Officer & EVP | Sale | 50,057 | $224.03 | $11.2M | 1,081,705 | |
traded | Ava Harter Chief Legal Officer | Sale | 1,500 | $222.66 | $334.0K | 53,205 | |
traded | Douglas R. Bettinger Chief Financial Officer & EVP | Sale | 40,329 | $230.22 | $9.3M | 1,054,012 | |
traded | Ava Harter Chief Legal Officer | Sale | 4,000 | $232.50 | $930.0K | 54,705 | |
traded | Eric Brandt Director | Sale | 35,000 | $225.60 | $7.9M | 253,705 | |
traded | Timothy Archer President and CEO | SalePre-arranged (10b5-1) | 163,300 | $163.86 | $26.8M | 932,409 | |
traded | Douglas R. Bettinger Chief Financial Officer & EVP | Sale | 40,080 | $150.60 | $6.0M | 987,237 | |
traded | Bethany Mayer Director | SalePre-arranged (10b5-1) | 30 | $159.52 | $4.8K | 3,257 | |
traded | Bethany Mayer Director | SalePre-arranged (10b5-1) | 1,298 | $159.99 | $207.7K | 1,652 | |
traded | Ava Harter Chief Legal Officer | Sale | 9,010 | $157.47 | $1.4M | 56,786 |
GET /stocks/filings/vX/form-4?tickers=LRCX&filing_date.gte=2025-10-24&sort=filing_date.desc&limit=500{
"status": "OK",
"results": [
{
"tickers": [
"LRCX"
],
"issuer_cik": "0000707549",
"owner_cik": "0001405693",
"accession_number": "0001405693-26-000011",
"form_type": "4",
"filing_date": "2026-09-10",
"period_of_report": "2026-09-09",
"issuer_name": "LAM RESEARCH CORP",
"issuer_trading_symbol": "LRCX",
"owner_name": "Mayer Bethany",
"is_director": true,
"is_officer": false,
"is_ten_percent_owner": false,
"is_other": false,
"security_type": "non_derivative",
"record_type": "transaction",
"security_title": "Common Stock",
"transaction_timeliness": "O",
"aff_10b5_one": false,
"transaction_date": "2026-09-09",
"transaction_code": "S",
"equity_swap_involved": false,
"transaction_shares": 9557,
"transaction_price_per_share": 314.74,
"transaction_acquired_disposed": "D",
"shares_owned_following_transaction": 20995,
"transaction_value": 3007970.18,
"not_subject_to_section_16": false,
"direct_or_indirect": "I",
"nature_of_ownership": "By Trust",
"footnotes": [
{
"id": "F1",
"description": "The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $314.08 to $314.99, inclusive"
}
]
},
{
"tickers": [
"LRCX"
],
"issuer_cik": "0000707549",
"owner_cik": "0001343600",
"accession_number": "0001343600-26-000013",
"form_type": "4",
"filing_date": "2026-09-10",
"period_of_report": "2026-09-09",
"issuer_name": "LAM RESEARCH CORP",
"issuer_trading_symbol": "LRCX",
"owner_name": "ARCHER TIMOTHY",
"is_director": false,
"is_officer": true,
"is_ten_percent_owner": false,
"is_other": false,
"officer_title": "President and CEO",
"security_type": "non_derivative",
"record_type": "transaction",
"security_title": "Common Stock",
"transaction_timeliness": "O",
"aff_10b5_one": true,
"transaction_date": "2026-09-09",
"transaction_code": "S",
"equity_swap_involved": false,
"transaction_shares": 30000,
"transaction_price_per_share": 319.26,
"transaction_acquired_disposed": "D",
"shares_owned_following_transaction": 1075966,
"transaction_value": 9577800,
"not_subject_to_section_16": false,
"direct_or_indirect": "D",
"footnotes": [
{
"id": "F1",
"description": "This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 24, 2026."
},
{
"id": "F2",
"description": "The amount reported includes shares subject to unvested restricted stock units."
}
]
}
]
}
// trimmed to 2 resultsThe response includes every Form 4 record; this page keeps open-market purchases and sales on common stock and removes duplicate joint-filer rows.
Other insider activity (not market trades) · 78 records
- Option exercises20 records
- Tax withholding33 records
- Grants and awards19 records
- Gifts6 records
Reported on Form 4 but not purchases or sales in the market, so not counted in the totals above.
Build this yourself
This page joins two Massive endpoints: Form 4 filings and daily prices. Ask an agent to watch for new filings:
Using the Massive API (massive.com/docs/llms.txt), check Form 4 filings for LRCX every day with transaction_code=P and tell me when an insider files an open-market purchase, with their role, shares, price and the filing link.
How to read this page
- Open-market purchase or sale
- A buy or sell of the company's stock at market price. Grants, option exercises, shares withheld for tax, gifts and employee stock plan purchases are listed separately and not counted.
- Pre-arranged (10b5-1)
- The insider marked the filing as made under a trading plan set up in advance (SEC Rule 10b5-1). The mark covers the whole filing, and an unmarked filing may still be under a plan.
- Filing date
- Insiders have two business days to report a trade. Totals and the chart use the filing date, when the trade became public.