Stock ownership · SEC 13F · Q4 2025
LAM RESEARCH CORP
Who owns LAM RESEARCH CORP (CUSIP 512807306)? A look at the institutions behind it, how tightly they hold it, and the latest quarter's moves.
- $297.2M
- Reported value
- 17
- Institutions
- 95%
- Top-5 share
The verdict
According to SEC Form 13F-HR filings in this corpus, LAM RESEARCH CORP ranks #48 of 775 tracked securities by reported institutional value (largest first), matching the /stocks listing among names with ≥5 reporting holders. 17 institutions report $297.2M as of Q4 2025, with ownership dominated by its top few institutional owners.
- 17
- institutions hold it
- $297.2M
- reported 13F value
- 95%
- held by top 5
- #48
- of 775 by value
Based on long positions reported to the SEC as of Q4 2025; 13F omits shorts, options and non-US holdings.
According to SEC Form 13F-HR filings in this corpus, LAM RESEARCH CORP ranks #48 of 775 tracked securities by reported institutional value (largest first), matching the /stocks listing among names with ≥5 reporting holders.
How 13F ownership is computed · All tracked stocks · Concentration rankings
SEC Form 13F-HR ownership desk
CUSIP 512807306 · Q4 2025 $297M reported
VALUE-HEAVY · HOLDERS-NARROW · CONC-DOM · NEAR-PEER · ACTIVITY-QUIET · BOOK-MID
- VALUE-HEAVY #48/775
- HOLDERS-NARROW 17 filers
- CONC-DOM 95% top-5
- NEAR-PEER UNITED AIRLINES HLDG
- ACTIVITY-QUIET 0 new
- BOOK-MID 6Q history
Photo-finish peer on reported value: UNITED AIRLINES HLDG
Read with: Ownership concentration guide - LAM RESEARCH CORP's top-five holders account for 95% of reported value — read concentration before treating any single filer as a signal.
Reported-value neighbourhood · LAM RESEARCH CORP
Nearest tracked securities by aggregate 13F reported value, not a full corpus reprint.
LAM RESEARCH CORP vs. the broadly-held institutional universe
Where this security's reporting-institution count sits among tracked 13F securities
17 Top 25% higher than 75% of 216 securities
Broadly-held tracked securities, banded by reporting-institution count
Each bar is a band; taller bars hold more securities. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source SEC Form 13F-HR filings · Q4 2025
Institutional ownership over time
The number of institutions reporting a LAM RESEARCH CORP position has risen from 1 to 17 over the last 6 quarters of 13F filings.
Top Institutional Holders
| # | Institution | Shares | Value | Share of reported |
|---|---|---|---|---|
| 1 | MARINER INVESTMENT GROUP LLC | 736,000 | $126.0M | 42.4% |
| 2 | Pacer Advisors, Inc. | 691,482 | $118.4M | 39.8% |
| 3 | GROUPAMA ASSET MANAGMENT | 115,073 | $19.7M | 6.6% |
| 4 | MidFirst Bank | 94,537 | $16.2M | 5.4% |
| 5 | J. Stern & Co. LLP | 3,459,377 | $3.5M | 1.2% |
| 6 | Alternative Investment Advisors, LLC. | 19,689 | $3.4M | 1.1% |
| 7 | DGS Capital Management, LLC | 17,447 | $3.0M | 1.0% |
| 8 | Oak Grove Capital LLC | 16,400 | $2.8M | 0.9% |
| 9 | Astoria Portfolio Advisors LLC. | 5,304 | $1.3M | 0.4% |
| 10 | Anchor Investment Management, LLC | 6,426 | $1.1M | 0.4% |
| 11 | CHELSEA COUNSEL CO | 4,000 | $686K | 0.2% |
| 12 | Stone Wealth Partners | 3,521 | $604K | 0.2% |
| 13 | Nolet Wealth Management, LLC | 1,546 | $265K | 0.1% |
| 14 | Ketron Financial | 1,433 | $245K | 0.1% |
| 15 | Bell Investment Advisors, Inc | 628 | $108K | 0.0% |
| 16 | TD Capital Management LLC | 25 | $4K | 0.0% |
| 17 | SG Trading Solutions, LLC | 12,049 | $2K | 0.0% |
Investment Discretion
SEC Form 13F requires each institutional filer to report whether it exercises sole or shared discretion over a position. Among LAM RESEARCH CORP's reported holders for Q4 2025, by reported value:
Latest Quarter Activity · Q4 2025
Frequently Asked Questions
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Nationwide stocks with similar institutional value or holder count
Two 13F-derived peer sets for LAM RESEARCH CORP: nearest aggregate reported value and nearest institutional holder count, not catalog browse links.
Similar reported value
Nearest stocks by aggregate 13F reported value ($297.2M here).
Similar holder count
Nearest stocks by number of disclosing 13F holders (17 here).
Source: U.S. Securities and Exchange Commission (SEC) - EDGAR Form 13F-HR institutional holdings filings · Q4 2025 13F-HR discloses long US-listed equity positions of managers with $100M+ qualifying assets, filed within 45 days of period end. Short positions and most derivatives are not disclosed.
PlainFundData is rendered directly from SEC EDGAR Form 13F-HR institutional holdings filings, no number is typed in by an editor. Holder lists, concentration, and reported value on this page are aggregated live from those 13F-HR extracts. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 2026-09-26.