Were the Lam Research (LRCX) share dispositions open-market sales?

The filing describes the dispositions as shares automatically withheld to satisfy tax withholding obligations upon restricted stock unit vesting. This indicates they were tax-withholding dispositions, not open-market sales initiated for investment reasons by the executive.

Lam Research (LRCX) CLO logs new stock awards and tax trades

Filing Impact

(Very High)

Filing Sentiment

(Neutral)

Form Type

Rhea-AI Filing Summary

Lam Research chief legal officer Ava Harter reported stock awards and related tax withholdings. On 02/27/2026, she received grants of 7,106 shares of common stock and 8,685 market-based performance restricted stock units at $0.00 per share. The common stock units will vest in three equal installments on 02/27/2027, 02/27/2028, and 02/27/2029. The performance 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 from 02/02/2026 through 02/01/2029. To satisfy tax withholding obligations upon vesting of restricted stock units, 1,988 shares were withheld on 02/27/2026 and 3,199 shares were withheld on 03/27/2026, at a price of $233.89 per share, leaving 58,705.455 common shares directly owned after the March transaction. The reported holdings include shares underlying unvested restricted stock units.

Insider Trade Summary

4 transactions reported

Mixed 4 txns

Insider Harter Ava

Role Chief Legal Officer

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock	3,199	$233.89	$748K
Grant/Award	Market-based Performance Restricted Stock Unit	8,685	$0.00	--
Grant/Award	Common Stock	7,106	$0.00	--
Tax Withholding	Common Stock	1,988	$233.89	$465K

Holdings After Transaction: Common Stock — 58,705.455 shares (Direct); Market-based Performance Restricted Stock Unit — 8,685 shares (Direct)

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 - 06:12 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
Estimated average burden
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^*

Harter Ava

(Last)

(First)

(Middle)

4650 CUSHING PKWY

(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)
	Chief Legal Officer

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		7,106⁽¹⁾	A	$0	63,892.455⁽²⁾	D
Common Stock	02/27/2026		F		1,988⁽³⁾	D	$233.89	61,904.455⁽²⁾	D
Common Stock	03/27/2026		F		3,199⁽³⁾	D	$233.89	58,705.455⁽²⁾	D

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		8,685		⁽⁴⁾	⁽⁴⁾	Common Stock	8,685	$0	8,685	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 stock transactions did LRCX’s chief legal officer report on this Form 4?

Ava Harter reported grants of 7,106 shares of Lam Research common stock and 8,685 market-based performance restricted stock units, plus two tax-withholding dispositions totaling 5,187 shares that were automatically withheld upon restricted stock unit vesting.

How many Lam Research (LRCX) shares does Ava Harter own after these transactions?

After the March 27, 2026 tax-withholding disposition, Ava Harter directly owns 58,705.455 shares of Lam Research common stock. This amount includes shares that are subject to unvested restricted stock units as disclosed in the filing footnotes.

What are the vesting terms of the new restricted stock units reported by LRCX?

The time-based restricted stock units vest in three equal installments on February 27, 2027, February 27, 2028, and February 27, 2029. The filing states that the reported share amount includes those unvested restricted stock units held by the executive.

How do the market-based performance RSUs for LRCX’s CLO vest?

The market-based performance restricted stock units may vest between 0% and 150% on February 27, 2029. Vesting depends on Lam Research’s total shareholder return versus the PHLX Semiconductor Total Return Index over the performance period from February 2, 2026 through February 1, 2029.

At what price were LRCX shares withheld for taxes in this Form 4?

Shares withheld to satisfy tax obligations were valued at $233.89 per share. This price applied to both the 1,988 shares withheld on February 27, 2026 and the 3,199 shares withheld on March 27, 2026, according to the transaction details.