Timothy Archer - 17 Dec 2025 Form 4 Insider Report for LAM RESEARCH CORP (LRCX)

Reporting relationship: President and CEO
Issuer ticker: LRCX
Reported as of: 17 Dec 2025
Net transaction value: -$24,755,760
SEC form: 4
Accepted by SEC: 18 Dec 2025, 12:55:57 UTC
Prior SEC filing: 14 Mar 2025
Next SEC filing: 05 Feb 2026
Source filing: View source filing
Reporting owner signature: Marta Woods by Power of Attorney

Key filing fact

Timothy Archer filed Form 4 for LAM RESEARCH CORP (LRCX) on 18 Dec 2025.

Key facts

This page summarizes Timothy Archer's Form 4 filing for LAM RESEARCH CORP (LRCX).
4 reported transactions and 1 derivative row are listed below.
Accepted by SEC: 18 Dec 2025, 12:55.

Change

Previous filing in this sequence was filed on 14 Mar 2025.
Current net transaction value: -$24,755,760.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001343600 Primary reporting owner

ARCHER TIMOTHY

Relationship: President and CEO
Address: 4650 CUSHING PARKWAY, FREMONT
Signature: Marta Woods by Power of Attorney
Signature date: 18 Dec 2025

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

LRCX transaction

Common Stock

Sale

Transaction value: $8,193,000
Shares: -50,000
Change %: -5.1%
Price: $163.86
Shares after: 932,409
Date: 17 Dec 2025
Ownership: Direct
Footnotes: F1, F2

LRCX transaction

Common Stock

Options Exercise

Transaction value: $2,002,578
Shares: +113,300
Change %: +12%
Price: $17.68
Shares after: 1,045,709
Date: 17 Dec 2025
Ownership: Direct
Footnotes: F1, F2

LRCX transaction

Common Stock

Sale

Transaction value: $18,565,338
Shares: -113,300
Change %: -11%
Price: $163.86
Shares after: 932,409
Date: 17 Dec 2025
Ownership: Direct
Footnotes: F1, F2

LRCX holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 48,026
Date: 17 Dec 2025
Ownership: By 401(k)

LRCX holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 5,670
Date: 17 Dec 2025
Ownership: By Spouse 401(k)

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

LRCX transaction Derivative

Employee Stock Option (Right to Buy)

Options Exercise

Transaction value: $0
Shares: -113,300
Change %: -100%
Price: $0.000000
Shares after: 0
Date: 17 Dec 2025
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 113,300
Exercise price: $17.68
Footnotes: F1, F3

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Rule 10b5-1 trading plan

These transactions were reported as open-market trades under a Rule 10b5-1 plan. The plan lets an insider set trading instructions in advance, which can reduce the risk of trading while in possession of material nonpublic information.

Original filing language: transaction made pursuant to a contract, instruction, or written plan intended to satisfy Rule 10b5-1(c).

Explanation of responses 3 footnotes

Footnote F1

This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 19, 2025

Footnote F2

The amount reported includes shares subject to unvested restricted stock units.

Footnote F3

The stock options will become exercisable in three equal installments on 03/01/2020, 03/01/2021, and 03/01/2022.