Lam Research (LRCX) SVP Rammohan reports initial insider stock and RSU holdings

Rhea-AI Filing Summary

LAM RESEARCH CORP executive Karthikeyan Rammohan filed an initial Form 3 reporting his equity holdings as SVP, Global Ops & Ent Solns. The filing lists direct holdings of common stock and multiple grants of market-based performance restricted stock units that vest between 0% and 150% based on total shareholder return versus the PHLX Semiconductor Total Return Index over multi‑year performance periods ending in 2027, 2028, and 2029. It also notes additional common stock held indirectly through a trust and a 401(k) plan.

SEC Form 3

FORM 3

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

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

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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1. Name and Address of Reporting Person^*

Rammohan Karthikeyan

(Last) (First) (Middle)

C/O LAM RESEARCH CORPORATION

4650 CUSHING PKWY

(Street)

FREMONT CA 94538

(City) (State) (Zip)

2. Date of Event Requiring Statement (Month/Day/Year)
03/06/2026

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

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

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	SVP, Global Ops & Ent Solns

5. 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 Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Common Stock	16,600(1)	D
Common Stock	79,856	I	By Trust
Common Stock	2,578.029	I	By 401K

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Market-based Performance Restricted Stock Unit	(2)	(2)	Common Stock	4,609	$0	D
Market-based Performance Restricted Stock Unit	(3)	(3)	Common Stock	6,840	$0	D
Market-based Performance Restricted Stock Unit	(4)	(4)	Common Stock	8,328	$0	D

Explanation of Responses:

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

2. The Market-based performance restricted stock units will vest between 0% and 150% on 2/28/2028. 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 02/03/2025 through 02/02/2028.

3. The Market-based performance restricted stock units will vest between 0% and 150% on 03/01/2027. 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 02/01/2024 through 01/31/2027.

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	03/10/2026
	** 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 5 (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.
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FAQ

What does the Form 3 filing by LRCX executive Karthikeyan Rammohan show?

The filing shows Karthikeyan Rammohan’s initial ownership in LAM RESEARCH CORP, including common stock and market-based performance restricted stock units, reflecting both direct holdings and indirect interests through a trust and a 401(k) retirement plan.

What equity awards does Karthikeyan Rammohan hold at Lam Research (LRCX)?

He holds several market-based performance restricted stock units. These awards can vest between 0% and 150% depending on Lam Research’s total shareholder return compared with the PHLX Semiconductor Total Return Index over specified multi‑year performance periods.

How is vesting of the Lam Research (LRCX) performance RSUs determined?

The market-based performance RSUs vest between 0% and 150% on set future dates, based on Lam Research’s total shareholder return percentile ranking versus the PHLX Semiconductor Total Return Index over defined performance periods ending in 2027, 2028, and 2029.

What indirect Lam Research (LRCX) share ownership is reported for Rammohan?

The Form 3 reports indirect ownership of Lam Research common stock held by a trust and additional shares held through a 401(k) plan, in addition to his directly owned common shares and performance-based restricted stock units.

Does the Lam Research (LRCX) Form 3 indicate any stock purchases or sales?

No specific buy or sell transactions are identified. The Form 3 functions as an initial statement of beneficial ownership, listing Rammohan’s existing holdings in common stock and performance-based restricted stock units as of the reported date.