LAM RESEARCH (LRCX) Institutional Ownership & Top Holders
The most recent SEC Form 13F filings (Q2 2026) show 22 hedge funds and institutional investors holding a combined 17.8M shares of LAM RESEARCH (LRCX), valued at $7.7B. The median portfolio weight is 2.4%.
Institutional ownership changes in LRCX reflect net selling, as the combined position decreased by 828K shares (4.5%) from the previous quarter.
Among 13F filers, the funds with the highest portfolio allocation to LRCX are Monolith (14.9% of its 13F portfolio), Heard Capital (14.1%), and Trivest Advisors (11.7%). In Q2 2026, Monolith made the largest position increase (+14.9%), while RIPOSTE CAPITAL made the largest reduction (-5.4%).
Top 10 Institutional Holders in LAM RESEARCH (LRCX), Ranked by Portfolio Weight
Based on the latest SEC Form 13F filings (Q2 2026).
| # | Fund | Shares | Market Value | Portfolio Weight |
|---|---|---|---|---|
| 1 | Monolith | 57,100 | $24.7M | 14.9% |
| 2 | Heard Capital | 757,760 | $328.4M | 14.1% |
| 3 | Trivest Advisors | 860,000 | $372.7M | 11.7% |
| 4 | Coatue Management | 9,441,603 | $4.1B | 8.4% |
| 5 | 11 Capital Partners | 65,290 | $28.3M | 8.3% |
| 6 | Dorsal Capital Management | 400,000 | $173.3M | 6.2% |
| 7 | Tiger Global | 3,163,495 | $1.4B | 5.7% |
| 8 | Palestra | 388,886 | $168.5M | 5.7% |
| 9 | Manchester Global Management | 115,720 | $50.1M | 5.5% |
| 10 | Polen Capital Management | 859,036 | $372.2M | 3.2% |
- 22Institutional investors
- 17,767,490Shares held (disclosed)
- $7.7B13F market value
- 2.4%Median portfolio weight
Ownership History
Quarter-by-quarter share count, market value, and portfolio conviction weight (up to 5 of the heaviest weight-by-portfolio funds) of LRCX. Sourced from 13F filings; reflects long equity positions only.
Quarter-over-Quarter ActivityQ2 2026
The biggest weight-increase and weight-decrease changes among funds that hold LRCX. Deltas compare the selected filing to the previous reporting quarter.
Top buyers
- Monolith+14.9% · +57,100 shares
- 11 Capital Partners+8.3% · +65,290 shares
- Dorsal Capital Management+6.2% · +400,000 shares
Top sellers
- RIPOSTE CAPITAL-5.4% · -55,000 shares
- M & L Capital Management-4.1% · -78,050 shares
- Tyro Capital Management-2.0% · -37,862 shares
Ownership Statistics
- Funds holding
- 22
- Median weight
- 2.4%
- Largest holder
- Monolith · 14.9%
- Smallest holder
- Mairs & Power · 0.0%
- Shares held
- 17,767,490 (-828,037)
All Institutional HoldersSortable · searchable
All institutional investors (Max 50) holding LRCX in the selected quarter. Click a fund name to drill into its full 13F portfolio.
| 1 | Monolith | 57,100 | $24.7M | 14.9% |
| 2 | Heard Capital | 757,760 | $328.4M | 14.1% |
| 3 | Trivest Advisors | 860,000 | $372.7M | 11.7% |
| 4 | Coatue Management | 9,441,603 | $4.1B | 8.4% |
| 5 | 11 Capital Partners | 65,290 | $28.3M | 8.3% |
| 6 | Dorsal Capital Management | 400,000 | $173.3M | 6.2% |
| 7 | Tiger Global | 3,163,495 | $1.4B | 5.7% |
| 8 | Palestra | 388,886 | $168.5M | 5.7% |
| 9 | Manchester Global Management | 115,720 | $50.1M | 5.5% |
| 10 | Polen Capital Management | 859,036 | $372.2M | 3.2% |
| 11 | Whale Rock | 742,638 | $321.8M | 2.6% |
| 12 | Appaloosa | 382,500 | $165.7M | 2.2% |
| 13 | E20 Capital | 51,894 | $22.5M | 1.8% |
| 14 | Altimeter | 394,080 | $170.8M | 1.7% |
| 15 | Melqart | 30,961 | $13.4M | 1.3% |
| 16 | Duquesne Family Office | 43,600 | $18.9M | 0.4% |
| 17 | UTIMCO - The University of Texas | 2,425 | $1.1M | 0.1% |
| 18 | George Kaiser Family Foundation | 2,058 | $891.8K | 0.1% |
| 19 | Maverick Capital | 4,083 | $1.8M | 0.0% |
| 20 | Davis Selected Advisers | 2,780 | $1.2M | 0.0% |
| 21 | Causeway Capital Management | 816 | $353.6K | 0.0% |
| 22 | Mairs & Power | 765 | $331.5K | 0.0% |
Institutional Investor Count Over Time
Number of institutional investors disclosing a long position in LAM RESEARCH CORP (LRCX) each reporting quarter. Sourced from SEC Form 13F-HR filings.
See LAM RESEARCH CORP (LRCX) insider transactions (SEC Form 4) →
Methodology & FAQ
Methodology: How We Track LRCX Institutional Holdings
Our data is systematically aggregated directly from quarterly Form 13F-HR disclosures submitted to the U.S. Securities and Exchange Commission (SEC).
- Who must file: This dataset includes filings from U.S. institutional investment managers, hedge funds, mutual funds, university endowments, and family offices managing at least $100 million in Section 13(f) securities (including equities, options, convertibles, ETFs, and warrants).
- What is included: We capture long positions in Section 13(f) securities for LAM RESEARCH CORP (LRCX). By SEC regulation, 13F filings do not require the disclosure of short positions, non-U.S. holdings, or OTC derivatives. Listed options are excluded from portfolio weight calculations to ensure comparability across filers.
- Metric definition: “Portfolio Weight” shows how much of a fund's total reported 13F portfolio value (excluding listed options) is allocated to LRCX on the specific reporting date.
- How to use this data: Quarter-over-quarter changes in shares and portfolio weight reflect a combination of active trading and market price movements. These are descriptive metrics of fund allocation, not explicit buy or sell signals.
How do you measure hedge fund conviction and institutional concentration in LRCX?
We evaluate fund conviction by looking at portfolio weight rather than just absolute share count. By tracking how the largest holders , such as Monolith , Heard Capital , and Trivest Advisors as of Q2 2026, change their position sizing quarter-over-quarter, we help investors distinguish between deliberate position sizing changes and passive mark-to-market drift.
Does the LRCX ownership data include short interest or options?
SEC Form 13F mandates the disclosure of long positions in Section 13(f) securities, which includes equities and listed options (put and call contracts), but excludes short interest, swaps, and OTC derivatives by regulatory design. On this platform, listed options are excluded from portfolio weight calculations to ensure comparability across filers.
Are family offices and university endowments included in this LRCX data?
Yes. In addition to traditional hedge funds and large asset managers, any institutional entity exercising investment discretion over at least $100 million in Section 13(f) securities must file a Form 13F. This explicitly includes single-family offices and university endowments. If a qualifying family office or endowment holds LRCX stock, their allocation is systematically aggregated alongside traditional fund data.
When is the institutional ownership data updated, and is there a reporting lag?
Institutional investment managers are required to file their Form 13F within 45 days after the end of a calendar quarter (the standard “T+45” window). Our platform re-ingests new filings from the SEC EDGAR database on a nightly cycle, typically within 24–48 hours of publication, providing a point-in-time snapshot of reported consensus positioning for LRCX as of each filing date.