Lam Research Corporation
US ˙ NasdaqGS ˙ US5128071082

SecurityLRCX / Lam Research Corporation
InstitutionStock Portfolio - Stock Portfolio
Latest Disclosed Ownership131,304 shares
Latest Disclosed Value $ 12,781,131
Stock Portfolio - Stock Portfolio ownership in LRCX / Lam Research Corporation

On August 25, 2025 - Stock Portfolio - Stock Portfolio filed a NPORT-P form disclosing ownership of 131,304 shares of Lam Research Corporation (US:LRCX) valued at $12,781,131 USD as of June 30, 2025. The entity filed a previous NPORT-P on May 28, 2025 disclosing 131,304 shares of Lam Research Corporation. This represents a change in shares of 0.00% during the quarter. The current value of the position is $39,821,877 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2025-08-25 2025-06-30 NP Lam Research EC US5128073062 131,304 0 0.00 12,781 33.90 1.6639
2025-05-28 2025-03-31 NP Lam Research EC US5128073062 131,304 -34,876 -20.99 9,546 -20.48 1.3828
2025-02-19 2024-12-31 NP Lam Research EC US5128073062 166,180 152,077 1,078.33 12,003 4.29 1.6070
2024-11-27 2024-09-30 NP Lam Research EC US5128071082 14,103 4,935 53.83 11,509 17.90 1.5299
2024-08-20 2024-06-30 NP Lam Research EC US5128071082 9,168 0 0.00 9,763 9.60 1.3871
2024-05-28 2024-03-31 NP Lam Research EC US5128071082 9,168 -477 -4.95 8,907 17.91 1.3287
2024-02-02 2023-12-31 NP Lam Research EC US5128071082 9,645 -1,655 -14.65 7,555 6.66 1.2708
2023-11-29 2023-09-30 NP Lam Research EC US5128071082 11,300 -3,100 -21.53 7,083 -23.50 1.2668
2023-08-22 2023-06-30 NP Lam Research EC US5128071082 14,400 -7,000 -32.71 9,257 -18.40 1.5814
2023-05-26 2023-03-31 NP Lam Research EC US5128071082 21,400 5,400 33.75 11,345 68.71 2.0321
2023-03-01 2022-12-31 NP Lam Research EC US5128071082 16,000 300 1.91 6,725 17.02 1.2226
2022-11-28 2022-09-30 NP Lam Research EC US5128071082 15,700 -300 -1.88 5,746 -15.72 1.0519
2022-08-22 2022-06-30 NP Lam Research EC US5128071082 16,000 800 5.26 6,818 -16.56 1.1469
2022-05-27 2022-03-31 NP Lam Research EC US5128071082 15,200 -1,800 -10.59 8,172 -33.16 1.1203
2022-02-28 2021-12-31 NP Lam Research EC US5128071082 17,000 17,000 12,226 1.4031
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.