Lam Research (NASDAQ: LRCX) CEO reports 271,530-share equity award

Rhea-AI Filing Summary

Lam Research president and CEO Timothy Archer reported equity award activity involving both derivative units and common stock. On 02/04/2026, an award of 181,020 market-based performance restricted stock units coded "M" was settled at an exercise price of $0, leaving 0 such units directly owned. On the same date, Archer acquired 271,530 shares of Lam Research common stock, also coded "M" at a price of $0, and directly held 1,203,939 common shares following the transaction. He also indirectly holds 48,025.775 shares through a 401(k) account and 5,670.061 shares through a spouse’s 401(k). The footnotes explain that the original 181,020 performance units were granted on 03/01/2023 with vesting between 0% and 150% based on Lam Research total shareholder return versus the PHLX Semiconductor total return index over the performance period from 02/01/2023 through 01/31/2026, with vesting scheduled on 03/01/2026.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

ARCHER TIMOTHY

(Last) (First) (Middle)

4650 CUSHING PARKWAY

(Street)

FREMONT CA 94538

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
LAM RESEARCH CORP [ LRCX ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	President and CEO

3. Date of Earliest Transaction (Month/Day/Year)
02/04/2026

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	02/04/2026		M		271,530(1)	A	$0	1,203,939(2)	D
Common Stock								48,025.775	I	By 401(k)
Common Stock								5,670.061	I	By Spouse 401(k)

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Market-based Performance Restricted Stock Unit	$0	02/04/2026		M			181,020	(3)	(3)	Common Stock	181,020	$0	0	D

Explanation of Responses:

1. On 03/01/2023, the Reporting Person received a grant of 181,020 Market-based Performance Restricted Stock Units vesting between 0% and 150% on 03/01/2026. The vesting of this award is based on the total return stock price performance of Lam Research shares (assuming reinvestment of dividends) relative to the market price performance of the PHLX Semiconductor Sector Total Return Index, comparing the 50-trading day trailing average closing price over the performance period from 02/01/2023 through 01/31/2026.

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

3. The Market-based performance restricted stock units will vest between 0% and 150% on 03/01/2026. The performance of this award is based on the Lam Research Total Shareholder Return performance relative to the PHLX Semiconductor Total Return Index Total Shareholder Return during the performance period of 02/01/2023 through 01/31/2026.

Remarks:

	Marta Woods by Power of Attorney	02/05/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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FAQ

What insider transaction did Lam Research (LRCX) disclose for Timothy Archer?

Lam Research reported that CEO Timothy Archer had a performance-based equity award settle on 02/04/2026. An award of 181,020 market-based performance restricted stock units coded "M" at $0 converted, and his directly held common stock increased to 1,203,939 shares after the transaction.

How many Lam Research (LRCX) common shares does the CEO hold after this filing?

After the reported 02/04/2026 transaction, CEO Timothy Archer directly holds 1,203,939 shares of Lam Research common stock. He also has indirect holdings of 48,025.775 shares through a 401(k) and 5,670.061 shares through his spouse’s 401(k), as disclosed.

What are the terms of the performance stock units in this Lam Research (LRCX) Form 4?

The filing states Archer received 181,020 market-based performance restricted stock units on 03/01/2023. These units vest between 0% and 150% on 03/01/2026 based on Lam Research total shareholder return versus the PHLX Semiconductor total return index over 02/01/2023–01/31/2026.

What does transaction code "M" mean in the Lam Research (LRCX) CEO’s Form 4?

Transaction code "M" indicates an exercise or conversion of a derivative security. In this case, 181,020 market-based performance restricted stock units were settled at an exercise price of $0, and 271,530 Lam Research common shares coded "M" were acquired on 02/04/2026 at $0.

Are unvested restricted stock units included in the Lam Research (LRCX) CEO share totals?

Yes. A footnote explains that the amount of Lam Research common stock reported as beneficially owned by CEO Timothy Archer includes shares subject to unvested restricted stock units, meaning some of the disclosed holdings are tied to awards that have not yet fully vested.

How is Lam Research (LRCX) performance measured for the CEO’s market-based units?

The performance units measure Lam Research total shareholder return, assuming dividend reinvestment, against the PHLX Semiconductor Sector Total Return Index. The comparison uses 50-trading-day trailing average closing prices over the performance period from 02/01/2023 through 01/31/2026 to determine vesting levels.