Lam Research Corporation
DE ˙ XTRA ˙ US5128071082
273,40 € ↓ -1,90 (-0,69%)
2026-05-29
DEL PRIS
SecurityDE:LAR0 / Lam Research Corporation
InstitutionAsset Management One Co., Ltd.
Latest Disclosed Ownership668,713 shares
Latest Disclosed Value $ 142,877,220
Asset Management One Co., Ltd. reports 2.13% increase in ownership of LAR0 / Lam Research Corporation

On May 8, 2026 - Asset Management One Co., Ltd. filed a 13F-HR form disclosing ownership of 668,713 shares of Lam Research Corporation (DE:LAR0) valued at $123,658,408 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 27, 2026 disclosing 654,768 shares of Lam Research Corporation. This represents a change in shares of 2.13% during the quarter. The current value of the position is $182,826,134 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.

Upgrade to unlock premium data and export to Excel .

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)
2026-05-08 2026-03-31 13F LAM RESEARCH COM NEW 512807306 668,713 13,945 2.13 142,877 24.42 0.4213
2026-01-27 2025-12-31 13F LAM RESEARCH COM NEW 512807306 654,768 56,131 9.38 114,835 43.26 0.3193
2025-10-22 2025-09-30 13F LAM RESEARCH COM NEW 512807306 598,637 45,946 8.31 80,157 49.00 0.2322
2025-07-31 2025-06-30 13F LAM RESEARCH COM NEW 512807306 552,691 10,476 1.93 53,799 36.48 0.1687
2025-04-23 2025-03-31 13F LAM RESEARCH COM NEW 512807306 542,215 32,462 6.37 39,419 5.36 0.1363
2025-01-30 2024-12-31 13F LAM RESEARCH COM NEW 512807306 509,753 509,753 37,416 0.1286
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.