Lam Research director sells 9,557 shares at $314.74

LAM RESEARCH CORP (LRCX) director Bethany Mayer reported selling 9,557 sharesSeptember 9, 2026weighted average price of $314.74 per share$314.08 and $314.99 per share.

Rhea-AI Filing Summary

LAM RESEARCH CORP (LRCX) director Bethany Mayer reported selling 9,557 sharesSeptember 9, 2026weighted average price of $314.74 per share$314.08 and $314.99 per share. After these transactions, the trust held 20,995 shares1,635 shares

Insider Trade Summary

Net Seller: 9,557 shares

Net Sell 2 txns

Insider Mayer Bethany

Role Director

Sold 9,557 shs ($3.01M)

Type	Security	Shares	Price	Value
Sale	Common Stock F1	9,557	$314.74	$3.01M
holding	Common Stock F2	--	--	--

Holdings After Transaction: Common Stock — 20,995 shares (Indirect, By Trust); Common Stock — 1,635 shares (Direct)

Footnotes (2)

1. F1. The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $314.08 to $314.99, inclusive
2. F2. The amount reported includes shares subject to unvested restricted stock units.

Key Figures

Shares sold: 9,557 shares Weighted average sale price: $314.74 per share Sale price range: $314.08–$314.99 per share +2 more

5 metrics

Shares sold 9,557 shares Common stock sold on September 9, 2026 by director via trust

Weighted average sale price $314.74 per share Average price for 9,557 shares sold on September 9, 2026

Sale price range $314.08–$314.99 per share Range of prices for multiple trades included in the reported sale

Indirect holdings after sale 20,995 shares Shares of common stock held indirectly through a trust after the sale

Direct holdings after transaction 1,635 shares Directly held common shares, including those underlying unvested restricted stock units

Key Terms

weighted average sale price, unvested restricted stock units, indirect ownership

3 terms

weighted average sale price financial

"The price reported in Column 4 is a weighted average sale price."

unvested restricted stock units financial

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

indirect ownership financial

"Shares held indirectly through a trust on behalf of the reporting person."

FAQ

What insider transaction did LRCX director Bethany Mayer report?

She reported a sale of 9,557 shares of Lam Research common stock on September 9, 2026 at a weighted average price of $314.74 per share, executed through a trust that holds her indirect ownership.

At what prices were Bethany Mayer’s LRCX shares sold?

The filing states that the 9,557 shares were sold at a weighted average price of $314.74 per share, in multiple transactions at prices ranging from $314.08 to $314.99 per share, inclusive.

How many LRCX shares does Bethany Mayer hold after the reported sale?

After the sale, a trust associated with her held 20,995 shares of Lam Research common stock indirectly, and she also reported 1,635 shares held directly, which include shares subject to unvested restricted stock units.

Is Bethany Mayer’s LRCX share sale under a Rule 10b5-1 trading plan?

No. The filing indicates that the transactions were not made under a Rule 10b5-1 trading plan, meaning no pre-arranged trading plan is disclosed for this sale.

How is Bethany Mayer’s ownership in LRCX structured?

Her reported holdings consist of 20,995 shares held indirectly through a trust and 1,635 shares held directly. The filing notes that the direct amount includes shares subject to unvested restricted stock units.

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Available on EDGAR 09/10/2026 - 01:04 PM Accepted by SEC EDGAR 09/10/2026 - 01:04 PM Learn about SEC filing dates

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^*

Mayer Bethany

(Last) (First) (Middle)

C/O LAM RESEARCH CORPORATION

4650 CUSHING PARKWAY

(Street)

FREMONT CALIFORNIA 94538

(City) (State) (Zip)

UNITED STATES

(Country)

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

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

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/09/2026

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

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

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

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	09/09/2026		S		9,557	D	$314.74(1)	20,995	I	By Trust
Common Stock								1,635(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)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $314.08 to $314.99, inclusive

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

Remarks:

	Marta Woods by Power of Attorney	09/10/2026
	** 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.
* Form 4: SEC 1474 (03-26)