LAM RESEARCH CORP (LRCX) insider trading
No open-market insider purchases of LAM RESEARCH CORP are on record; 1 open-market sale is.
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Insider purchases
No open-market purchases on record.
Insider sales
1 open-market sale on record
| Filed | Insider | Sold |
|---|---|---|
| Oct 26 Form 4 (opens sec.gov) |
Timothy ArcherPresident · planned (10b5-1) · option shares | $7.1M 31,400 at $227.02 |
Most insider sales are planned in advance or made for personal reasons, so a sale says less than a buy.
LRCX trades reported by members of Congress
| Reported | Member | Trade | Amount |
|---|---|---|---|
| Oct 29 |  David TaylorR-OH · House14 days after the trade | Buy | $1K–$15K |
| Sep 2 |  Sheldon WhitehouseD-RI · Senate20 days after the trade | Sale | $1K–$15K |
| Jul 21 |  Alan ArmstrongR-OK · Senate113 days after the trade | Buy | $1K–$15K |
| Jul 21 | Alan ArmstrongR-OK · Senate116 days after the trade | Buy | $1K–$15K |
Members of Congress report trades up to 45 days later, in dollar ranges. Every member's trades.
Planned insider sales of LRCX (Form 144)
| Filed | Insider | To sell |
|---|---|---|
| Oct 23 Form 144 | ARCHER TIMOTHYOfficer, Director · 10b5-1 plan | $7.1M 31,400 shares from Oct 23 |
A Form 144 is filed before an insider sells restricted or control shares; the Form 4 reports the sale once made.
Questions
Are insiders buying LRCX stock?
Not recently: no open-market purchases were filed in the last 90 days.
Who bought LRCX stock most recently?
No insider has bought LRCX on the open market in the filings on record.
How does InsiderBeacon score an insider buy?
Out of 100, from who bought, how much their stake grew, the size of the trade, whether other insiders bought within ten days, where the price sat in its 52-week range, and whether it was a first or a routine buy. The score is fixed when the filing arrives. The formula and the research behind it.
Data as of Oct 26, 2026, from SEC EDGAR Form 4 filings: open-market purchases (code P) of $25,000 or more, and open-market sales. Every row links to its filing. Scores summarise what a filing says (how the score works); outcomes are hypothetical, from the first close after the filing, and past results don't predict future ones. Disclaimer