Lam Research Corporation
MX ˙ BMV ˙ US5128071082
SecurityMX:LRCX / Lam Research Corporation
InstitutionDaiwa Securities Group Inc.
Latest Disclosed Ownership1,165,720 shares
Latest Disclosed Value $ 249,067,735
Daiwa Securities Group Inc. ownership in LRCX / Lam Research Corporation

On May 13, 2026 - Daiwa Securities Group Inc. filed a 13F-HR form disclosing ownership of 1,165,720 shares of Lam Research Corporation (MX:LRCX) valued at $249,067,735 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 357,094 shares of Lam Research Corporation. This represents a change in shares of 226.45% during the quarter.

Daiwa Securities Group Inc. has a history of taking positions in derivatives of the underlying security (LRCX) in the form of stock options.

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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Institutional Put/Call Ratios
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In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

MX:LRCX / Lam Research Corporation Historical Put/Call Ratio
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)
2026-05-13 2026-03-31 13F LAM RESEARCH COM NEW 512807306 1,165,720 808,626 226.45 249,068 408,206.56 0.7161
2026-02-10 2025-12-31 13F LAM RESEARCH COM NEW 512807306 357,094 14,478 4.23 61 35.56 0.1953
2025-11-14 2025-09-30 13F LAM RESEARCH COM NEW 512807306 342,616 44,613 14.97 46 55.17 0.1548
2025-08-14 2025-06-30 13F LAM RESEARCH COM NEW 512807306 298,003 7,389 2.54 29 38.10 0.1071
2025-05-13 2025-03-31 13F LAM RESEARCH COM NEW 512807306 290,614 -5,101 -1.72 21 0.00 0.0893
2025-02-07 2024-12-31 13F LAM RESEARCH COM NEW 512807306 295,715 295,715 21 0.0954
Disclosed Put Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share Price Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2026-05-13 2026-03-31 13F LAM RESEARCH COM NEW Put 750,000 6,456 n/a n/a n/a
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.