Lam Research (LRCX) insider buying and selling
Every Table I transaction reported by directors and officers of S&P 500 companies on SEC Form 4 filings (2 business days to file): each row labeled with its official transaction code, nothing filtered out beforehand.
Open-market purchases (code P) are the rare signal, in green; sales (code S) are common and often pre-scheduled (10b5-1). Table II (derivatives) is not included: its prices are exercise prices, not market values. Guide: insider buying.
| Date | Ticker | Insider | Role | Shares | Price | Amount | % of stake | Type / filing |
|---|
Download these transactions as CSV No account, no sign-up. The data is public: it comes from SEC Form 4 filings.
Lam Research Corporation (LRCX) insider buying and selling: no purchases, 23 sales
75 Form 4 Table I transactions filed with the SEC by Lam Research Corporation insiders between 2025-10-14 and 2026-09-10 (15-month history): 0 open-market purchases and 23 sales, plus 52 transactions under other Form 4 codes, broken down one by one below. The largest open-market trade is a sale of $26.8M by Archer Timothy on 2025-12-17.
Lam Research insider buying and selling over the last 12 months
Between Oct 21, 2025 and Oct 20, 2026, Lam Research insiders filed 22 sales worth $170.1M on the open market, and no purchases.
The biggest seller was Archer Timothy (President and CEO): $57.0M in 4 sales, out of 8 different sellers.
The largest trade of the period was a sale of $26.8M on Dec 17, 2025, by Archer Timothy (President and CEO), under a 10b5-1 plan. Form 4 on sec.gov (0001343600-25-000006).
Of the 22 sales, 13 (59%, $128.4M) carry the 10b5-1 plan flag on the Form 4, meaning they were scheduled months ahead; the other 9 do not.
The last three months show 5 sales, against 7 in the three before. The latest sale from Sep 9, 2026.
Against its sector (Technology, 85 companies with an insider page on this site), over the same dates the median is 22 sales and 0 purchases on the open market. Lam Research has more sales than 40 of the other 84, ranks 19 of 85 by net dollars sold, and 32 of the 85 have at least one purchase.
The 20 most important trades
With no open-market purchases, the table starts with LRCX's sales, largest first. The full history is in the tool above, already searched.
See all 75 LRCX trades in the full history →
| Trade date | Filed | Insider | Role | Amount | Code | Filing |
|---|---|---|---|---|---|---|
| 2025-12-17 | 2025-12-18 | Archer Timothy | President and CEO | $26.8M | S — Open-market sale (scheduled 10b5-1)2 Form 4 footnotesF1 This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 19, 2025 F2 The amount reported includes shares subject to unvested restricted stock units. | SEC |
| 2026-06-12 | 2026-06-15 | Brandt Eric | Director | $20.0M | S — Open-market sale (scheduled 10b5-1)19 Form 4 footnotesF1 This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 6, 2026. F2 The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $355.39 to $356.02, inclusive F3 The amount reported includes shares subject to unvested restricted stock units. F4 The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $356.685 to $357.67, inclusive F5 The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $357.68 to $358.35, inclusive F6 The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $358.73 to $359.54, inclusive F7 The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $359.84 to $360.79, inclusive F8 The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $360.85 to $361.83, inclusive F9 The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $361.87 to $362.82, inclusive F10 The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $363.92 to $363.77, inclusive F11 The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $363.92 to $364.85, inclusive F12 The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $364.98 to $365.67, inclusive F13 The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $366.56 to $367.55, inclusive F14 The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $367.62 to $368.49, inclusive F15 The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $368.70 to $369.64, inclusive F16 The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $369.70 to $370.69, inclusive F17 The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $370.70 to $371.59, inclusive F18 The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $371.77 to $372.76, inclusive F19 The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $372.79 to $373.36, inclusive | SEC |
| 2026-06-11 | 2026-06-15 | Brandt Eric | Director | $19.1M | S — Open-market sale (scheduled 10b5-1)27 Form 4 footnotesF1 This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 6, 2026. F2 The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $337.00 to $337.97, inclusive F3 The amount reported includes shares subject to unvested restricted stock units. F4 The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $338.19 to $339.15, inclusive F5 The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $339.23 to $340.20, inclusive F6 The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $340.278 to $341.249, inclusive F7 The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $341.418 to $342.202, inclusive F8 The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $342.415 to $343.39, inclusive F9 The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $343.40 to $344.377, inclusive F10 The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $344.396 to $345.348, inclusive F11 The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $345.386 to $346.336, inclusive F12 The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $346.383 to $347.359, inclusive F13 The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $347.383 to $348.355, inclusive F14 The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $348.391 to $349.351, inclusive F15 The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $349.409 to $350.260, inclusive F16 The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $352.824 to $353.805, inclusive F17 The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $353.818 to $354.743, inclusive F18 The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $354.805 to $355.746, inclusive F19 The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $355.75 to $356.709, inclusive F20 The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $356.759 to $357.703, inclusive F21 The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $357.762 to $358.70, inclusive F22 The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $358.79 to $359.735, inclusive F23 The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $359.819 to $360.59, inclusive F24 The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $360.60 to $361.54, inclusive F25 The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $361.595 to $362.550, inclusive F26 The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $362.58 to $363.57, inclusive F27 The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $363.765 to $364.37, inclusive | SEC |
| 2026-09-02 | 2026-09-03 | Varadarajan Seshasayee | Senior Vice President | $17.4M | S — Open-market sale (scheduled 10b5-1)2 Form 4 footnotesF1 This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 4, 2026. F2 The amount reported includes shares subject to unvested restricted stock units. | SEC |
| 2026-07-02 | 2026-07-06 | Archer Timothy | President and CEO | $11.7M | S — Open-market sale (scheduled 10b5-1)2 Form 4 footnotesF1 This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 24, 2026. F2 The amount reported includes shares subject to unvested restricted stock units. | SEC |
| 2026-03-04 | 2026-03-05 | Bettinger Douglas R | Chief Financial Officer & EVP | $11.2M | S — Open-market sale2 Form 4 footnotesF2 The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $223.90 to $224.39, inclusive F1 The amount reported includes shares subject to unvested restricted stock units. | SEC |
| 2026-09-09 | 2026-09-10 | Archer Timothy | President and CEO | $9.6M | S — Open-market sale (scheduled 10b5-1)2 Form 4 footnotesF1 This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 24, 2026. F2 The amount reported includes shares subject to unvested restricted stock units. | SEC |
| 2026-03-02 | 2026-03-03 | Bettinger Douglas R | Chief Financial Officer & EVP | $9.3M | S — Open-market sale2 Form 4 footnotesF2 The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $230.07 .00 to $230.39, inclusive F1 The amount reported includes shares subject to unvested restricted stock units. | SEC |
| 2026-08-06 | 2026-08-07 | Archer Timothy | President and CEO | $9.0M | S — Open-market sale (scheduled 10b5-1)2 Form 4 footnotesF1 This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 24, 2026. F2 The amount reported includes shares subject to unvested restricted stock units. | SEC |
| 2026-02-06 | 2026-02-09 | Brandt Eric | Director | $7.9M | S — Open-market saleForm 4 footnoteF1 The amount reported includes shares subject to unvested restricted stock units. | SEC |
| 2025-10-13 | 2025-10-14 | Vahedi Vahid | Senior Vice President | $7.2M | S — Open-market sale (scheduled 10b5-1)2 Form 4 footnotesF1 This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 11, 2025. F2 The amount reported includes shares subject to unvested restricted stock units. | SEC |
| 2026-07-13 | 2026-07-14 | Talwalkar Abhijit Y | Director | $6.1M | S — Open-market sale (scheduled 10b5-1)2 Form 4 footnotesF1 This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 11, 2026. F2 The amount reported includes shares subject to unvested restricted stock units. | SEC |
| 2025-11-14 | 2025-11-17 | Bettinger Douglas R | Chief Financial Officer & EVP | $6.0M | S — Open-market sale2 Form 4 footnotesF1 The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $150.48 to $150.82 inclusive F2 The amount reported includes shares subject to unvested restricted stock units. | SEC |
| 2026-05-01 | 2026-05-04 | Fernandes Neil J | Senior Vice President | $4.6M | S — Open-market sale (scheduled 10b5-1)2 Form 4 footnotesF1 This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 17, 2025. F2 The amount reported includes shares subject to unvested restricted stock units. | SEC |
| 2026-09-09 | 2026-09-10 | Mayer Bethany | Director | $3.0M | S — Open-market sale Indirect holding, through: By Trust Form 4 footnoteF1 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 | SEC |
| 2026-06-01 | 2026-06-02 | Fernandes Neil J | Senior Vice President | $2.4M | S — Open-market sale (scheduled 10b5-1)2 Form 4 footnotesF1 his transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 17, 2025. F2 The amount reported includes shares subject to unvested restricted stock units. | SEC |
| 2026-04-27 | 2026-04-28 | Harter Ava | Chief Legal Officer | $1.6M | S — Open-market saleForm 4 footnoteF1 The amount reported includes shares subject to unvested restricted stock units. | SEC |
| 2026-08-31 | 2026-09-01 | Harter Ava | Chief Legal Officer | $1.5M | S — Open-market sale (scheduled 10b5-1)2 Form 4 footnotesF1 This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on April 28, 2026. F2 The amount reported includes shares subject to unvested restricted stock units. | SEC |
| 2025-10-27 | 2025-10-28 | Harter Ava | Chief Legal Officer | $1.4M | S — Open-market saleForm 4 footnoteF1 The amount reported includes shares subject to unvested restricted stock units. | SEC |
| 2026-03-02 | 2026-03-03 | Harter Ava | Chief Legal Officer | $930k | S — Open-market sale | SEC |
The period balance: money in, money out
In the Form 4 filings submitted between Oct 14, 2025 and Sep 10, 2026 there is not one open-market purchase of Lam Research Corporation: 23 sales worth $177.4M and zero dollars bought.
Only codes P and S count, where an insider puts in or takes out their own money. A selling balance like Lam Research Corporation's is the norm in the S&P 500, where much of the pay comes as stock. It is not a recommendation to buy or sell: it is what was filed.
Every transaction, code by code
| Code | What it means | Trades | Reported amount |
|---|---|---|---|
| S | Open-market sale | 23 | $177.4M |
| A | Grant or award | 18 | $0 |
| M | Option exercise | 16 | $15.7M |
| F | Tax withholding (shares surrendered for taxes) | 12 | $89.1M |
| G | Gift | 6 | $0 |
| Total | Everything filed in the period | 75 | $282.1M |
31 of the 75 rows carry no usable amount on the Form 4: they count as trades and add $0. The code labels come from the SEC index.
Who has traded
Over the 15 months of history, 19 distinct people or entities have filed Lam Research Corporation transactions: none bought on the open market and 9 sold. Counted by CIK, the fixed number the SEC gives each filer, and not by name, which each filer types their own way.
Of the 9 who sold on the open market (23 sales in all), the three biggest sellers account for $130.6M of the $177.4M: 74% of the money in three people.
| Filer | Role | Transactions | Bought (count) | Sold (count) | Last filed |
|---|---|---|---|---|---|
| Archer Timothy | President and CEO | 12 | — | $57.0M (4) | 2026-09-10 |
| Brandt Eric | Director | 4 | — | $47.0M (3) | 2026-06-15 |
| Bettinger Douglas R | Chief Financial Officer & EVP | 8 | — | $26.5M (3) | 2026-03-05 |
| Varadarajan Seshasayee | Senior Vice President | 5 | — | $17.4M (1) | 2026-09-03 |
| Vahedi Vahid | Senior Vice President | 5 | — | $7.2M (1) | 2026-03-02 |
| Fernandes Neil J | Senior Vice President | 5 | — | $7.0M (2) | 2026-06-02 |
| Talwalkar Abhijit Y | Director | 3 | — | $6.1M (1) | 2026-07-14 |
| Harter Ava | Chief Legal Officer | 11 | — | $5.7M (5) | 2026-09-01 |
Shown here are the 8 who moved the most money, out of 19. The rest are in the full history, one link above. The name links to all their trades, in any company. "Transactions" counts any code; the money, open market only. Role: from their latest filing.
Month by month
By the month the trade was executed, not the month it was filed; months with no trades show zero. The busiest month was Mar 2026: 0 purchases and 4 sales, worth $21.8M. 4 of the 15 months have none.
| Month | Purchases | Amount | Sales | Amount |
|---|---|---|---|---|
| Aug 2025 | 0 | $0 | 0 | $0 |
| Sep 2025 | 0 | $0 | 0 | $0 |
| Oct 2025 | 0 | $0 | 2 | $8.7M |
| Nov 2025 | 0 | $0 | 3 | $6.2M |
| Dec 2025 | 0 | $0 | 1 | $26.8M |
| Jan 2026 | 0 | $0 | 0 | $0 |
| Feb 2026 | 0 | $0 | 1 | $7.9M |
| Mar 2026 | 0 | $0 | 4 | $21.8M |
| Apr 2026 | 0 | $0 | 1 | $1.6M |
| May 2026 | 0 | $0 | 1 | $4.6M |
| Jun 2026 | 0 | $0 | 3 | $41.5M |
| Jul 2026 | 0 | $0 | 2 | $17.8M |
| Aug 2026 | 0 | $0 | 2 | $10.5M |
| Sep 2026 | 0 | $0 | 3 | $30.0M |
| Oct 2026 | 0 | $0 | 0 | $0 |
The last month may be partial: a Form 4 is filed up to two business days later. The table does not say whether the pattern is good or bad; it says when it happened.
Lam Research Corporation (LRCX) analysis page →
Other Technology companies with insider trades
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How to read this data
12 of the 20 sales in the table are flagged as scheduled (10b5-1 plan): signed months ahead and executed automatically, so they say nothing about what the insider thinks today. Lam Research has no open-market purchase (code P) in the history, the most common case in the S&P 500: insiders are already paid in stock. The latest filing is from Sep 10, 2026, and a Form 4 arrives up to two business days after the trade.
19 of the 20 rows in the table carry footnotes from the Form 4 itself, folded into the code column and copied verbatim; a row with no footnote means the filing has none.
Guide: Insider buying · all guides
What is behind these trades
The concepts on this page, explained from scratch in the Academy. Free, no account.
- What the efficiency hypothesis says and what it does NOT sayIf an insider's purchase is public and anyone can read it, is there any information left in it? That is the exact question that brings people here.
- Who really moves the market: the types of investorWho sits on the other side of each order, and where a company's own insiders fit among them.
- Supply, demand and price: why it rises and falls constantlyHow a piece of news ends up inside the price, and why the reaction to a filed sale is rarely the one you would expect.
Source: SEC EDGAR Form 4. This is a list of public facts, not financial advice or a recommendation to buy or sell.