Were the Lam Research (LRCX) Form 4 share disposals open-market sales?

The reported disposals were not open-market sales. Several blocks of common stock, including 134,624 shares, were automatically withheld at $233.89 per share to satisfy tax withholding obligations triggered by vesting of restricted stock units, as described in the filing footnotes.

Lam Research (LRCX) CEO receives major stock awards and tax withholdings

Filing Impact

(Very High)

Filing Sentiment

(Neutral)

Form Type

Rhea-AI Filing Summary

LAM RESEARCH CORP President and CEO Timothy Archer reported equity compensation and related tax withholdings. He received a grant of 76,580 Market-based Performance Restricted Stock Units and 51,053 shares of common stock on 02/27/2026. The RSUs and performance units vest over time through 02/27/2029, while 134,624, 9,975, 8,111 and 19,584 common shares were automatically withheld at $233.89 per share to cover tax obligations as his restricted stock units vested.

Insider Trade Summary

8 transactions reported

Mixed 8 txns

Insider ARCHER TIMOTHY

Role President and CEO

Type	Security	Shares	Price	Value
Grant/Award	Market-based Performance Restricted Stock Unit	76,580	$0.00	--
Grant/Award	Common Stock	51,053	$0.00	--
Tax Withholding	Common Stock	134,624	$233.89	$31.49M
Tax Withholding	Common Stock	9,975	$233.89	$2.33M
Tax Withholding	Common Stock	8,111	$233.89	$1.90M
Tax Withholding	Common Stock	19,584	$233.89	$4.58M
holding	Common Stock	--	--	--
holding	Common Stock	--	--	--

Holdings After Transaction: Market-based Performance Restricted Stock Unit — 76,580 shares (Direct); Common Stock — 1,247,912 shares (Direct); Common Stock — 48,025.775 shares (Indirect, By 401(k))

Footnotes (1)

The restricted stock units will vest in three equal installments on 02/27/2027, 02/27/2028, and 02/27/2029. The amount reported includes shares subject to unvested restricted stock units. Represents shares that were automatically withheld upon vesting of restricted stock units to satisfy tax withholding obligations. The Market-based performance restricted stock units will vest between 0% and 150% on 2/27/2029. The performance of this award is based on the percentile ranking of Lam Research's Total Shareholder Return relative to the Total Shareholder Return of the companies in the PHLX Semiconductor Total Return Index during the performance period of 02/2/2026 through 02/01/2029.

Form 4 Insider Transactions: What Each Field Means →

03/02/2026 - 06:10 PM

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

OMB APPROVAL

OMB Number:			3235-0287
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hours per response:			0.5

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

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)
02/27/2026

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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	02/27/2026		A		51,053⁽¹⁾	A	$0	1,247,912⁽²⁾	D
Common Stock	02/27/2026		F		134,624⁽³⁾	D	$233.89	1,113,288⁽²⁾	D
Common Stock	02/27/2026		F		9,975⁽³⁾	D	$233.89	1,103,313⁽²⁾	D
Common Stock	02/27/2026		F		8,111⁽³⁾	D	$233.89	1,095,202⁽²⁾	D
Common Stock	02/27/2026		F		19,584⁽³⁾	D	$233.89	1,075,618⁽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)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
Market-based Performance Restricted Stock Unit	$0	02/27/2026		A		76,580		⁽⁴⁾	⁽⁴⁾	Common Stock	76,580	$0	76,580	D

Explanation of Responses:

1. The restricted stock units will vest in three equal installments on 02/27/2027, 02/27/2028, and 02/27/2029.

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

3. Represents shares that were automatically withheld upon vesting of restricted stock units to satisfy tax withholding obligations.

4. The Market-based performance restricted stock units will vest between 0% and 150% on 2/27/2029. The performance of this award is based on the percentile ranking of Lam Research's Total Shareholder Return relative to the Total Shareholder Return of the companies in the PHLX Semiconductor Total Return Index during the performance period of 02/2/2026 through 02/01/2029.

Remarks:

	Marta Woods by Power of Attorney	03/02/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

Source: View Original Filing on SEC EDGAR

FAQ

What insider transactions did LRCX CEO Timothy Archer report on this Form 4?

Timothy Archer reported equity awards and related tax withholdings. He received 76,580 Market-based Performance RSUs and 51,053 common shares, and had several blocks of common stock automatically withheld to satisfy tax obligations upon vesting of restricted stock units.

How many Lam Research (LRCX) performance RSUs did the CEO receive and when do they vest?

The CEO received 76,580 Market-based Performance Restricted Stock Units. These units may vest between 0% and 150% on 02/27/2029, based on Lam Research’s total shareholder return versus the PHLX Semiconductor Total Return Index over the performance period from 02/02/2026 through 02/01/2029.

What time-based restricted stock units did LRCX grant to CEO Timothy Archer?

Archer received 51,053 shares of Lam Research common stock as a restricted stock award. According to the filing, these restricted stock units vest in three equal installments on 02/27/2027, 02/27/2028 and 02/27/2029, reflecting a multi-year retention and incentive structure.

How many LRCX shares does the CEO hold directly after these transactions?

After the reported transactions, Timothy Archer directly held 1,075,618 Lam Research common shares in one line, with additional smaller adjustments shown, and 76,580 performance-based RSUs. The filing also notes indirect holdings in a 401(k) plan and a spouse’s 401(k) account.

How is performance measured for the Lam Research CEO’s Market-based RSUs?

Performance is tied to total shareholder return. Vesting of the Market-based performance RSUs between 0% and 150% on 02/27/2029 depends on Lam Research’s total shareholder return percentile rank versus the PHLX Semiconductor Total Return Index over the stated performance period.