Insider trade

CEO sold ~$18.6M of LRCX shares in the open market

Traded Dec 17, 2025 · Filed Dec 18, 2025

Lam ResearchLRCX

~$18.6M
Reported value · 113K sh @ $163.86: 932K
Holds after · shares reported: +119.5%
stock since the trade · S&P 500 +13.8%, $154.98 → $340.10 on Oct 1

Why it stands out

The boss of Lam Research sold $18.6M of Lam Research shares. It was planned long ago, so it says very little.

Written from the filing's own figures. OQRO describes what was reported and never tells you what to buy or sell

View the official recordSEC Form 4 — Statement of Changes in Beneficial Ownership

All the details

Dates, kept separate

Transaction date: Dec 17, 2025
Reporting period: Not applicable
Filed with the SEC: Dec 18, 2025

CEO$1M+Pre-arranged plan referenced

Context

Classification

open market sale

Code S — open-market or private sale

Absolute commitment

~$18,565,338

Shares × reported transaction price

Timing vs results

56 days after results of Oct 22, 2025, 42 days before results of Jan 28, 2026

Results dates are the company's own 8-K (Item 2.02). Many companies only let insiders trade in a window after results

Price at the time

Closed at $154.98 on Dec 17, 2025, 162% above its 52-week low and 8% below its high, little changed over the previous 30 trading days

52-week range $59.09 (Apr 4, 2025) to $168.71 (Dec 11, 2025), 87% of the way up, from 250 adjusted closes. 30 trading days earlier: $155.78 on Nov 4, 2025. Describes the past only, not a forecast

Planned / mechanical clue

Footnote references a pre-arranged trading plan (Rule 10b5-1)

Only flagged when a footnote says so; never inferred

After it was reported

After	Stock	S&P 500	Difference
7 days	+3.4%	+1.4%	+1.9%
30 days	+29.1%	-0.4%	+29.6%
90 days	+35.8%	-3.0%	+38.9%
180 days	+117.2%	+8.9%	+108.3%

Past results only. Not a forecast.

Source receipt

Record ID: 0001343600-25-000006
Filed / recorded: Dec 18, 2025, 5:55 PM UTC
Added to OQRO: Oct 2, 2026, 12:28 PM UTC
Parser: form4-xml-v1
Data quality: Verified: identifiers matched exactly
Issuer: LAM RESEARCH CORP
Issuer CIK: 707549
Ticker: LRCX
Reporting person: Timothy Archer
Relationship: Officer
Officer title: President and CEO
Security: Common Stock
Table: Non-derivative (Table I)
Transaction date: Dec 17, 2025
Transaction code: S
Shares / units: 113,300
Price per share: $163.86
Acquired / disposed: Disposed (D)
Shares owned after: 932,409
Ownership form: Direct
Amendment: No

Footnotes from the filing

This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 19, 2025
The amount reported includes shares subject to unvested restricted stock units.