Who owns Lam Research (LRCX)
Which tracked institutional funds hold LRCX, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See LRCX company fundamentals →
Ownership as of the 2026-Q1 13F filings (latest filed 2026-05-18). 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
How the tape is positioned
The tracked-fund tape on LRCX is one-sided between 2026-Q1 and 2026-Q2: 30 added or opened and 1800 trimmed or exited — on balance reducing.
A prompt to read the filings, not a verdict. 13F is a quarter-end snapshot disclosed up to 45 days late; a fund adds or exits for mandate, benchmark, and timing reasons that have nothing to do with a view on the stock. This is a starting question, not a signal to trade.
Conviction spread
LRCX’s largest tracked holder by dollar value, BlackRock, Inc., sizes it at 1.1% of its own reported 13F book, while the median holder sizes it at 0.5% of theirs — a 0.6pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in LRCX divided by its whole reported 13F book, so it is comparable across funds of different sizes and is unaffected by stock splits. A higher share means a fund has committed more of its book to the name — a starting question about conviction, not a verdict or a signal to trade.
Institutional & insider positioning
Between 2025-Q4 and 2026-Q1, across 2626 tracked filers holding LRCX, 1283 increased or opened the position and 1230 reduced or closed it; over the same quarter, open-market insider Form 4 buying and selling roughly offset.
This fuses two public signals for the same quarter — how tracked institutions changed their positions and whether insiders bought or sold in the open market. It describes what was filed; it is a starting question, not a verdict or a signal to trade.
New buyers & exits
Funds opening or closing a position in LRCX between the 2026-Q1 and 2026-Q2 13F filings, and the largest changes among funds holding it in both. New buyers and exits are counted on fund presence (split-invariant); adds and trims are measured on reported value.
New buyers 5
- Capital World Investors$112M
- Duquesne Family Office LLC$19M
- Hudson Bay Capital Management LP$6M
- MONTANOVA CAPITAL, LLC$2M
- MAVERICK CAPITAL LTD$2M
Full exits 1791
- VANGUARD CAPITAL MANAGEMENT LLC$17.3B
- VANGUARD PORTFOLIO MANAGEMENT LLC$7.9B
- GEODE CAPITAL MANAGEMENT, LLC$7.5B
- JPMORGAN CHASE & CO$6.5B
- AMERIPRISE FINANCIAL INC$4.4B
- MORGAN STANLEY$4.1B
Largest adds
- BlackRock, Inc.$29.5B
- Invesco Ltd.$17.1B
- STATE STREET CORP$13.7B
- PRICE T ROWE ASSOCIATES INC /MD/$7.8B
- FMR LLC$7.4B
- NORGES BANK$6.4B
Largest trims
- TWO SIGMA INVESTMENTS, LP$223M
- D. E. Shaw & Co., Inc.$113M
- BALYASNY ASSET MANAGEMENT L.P.$103M
- DISCOVERY CAPITAL MANAGEMENT, LLC / CT$62M
- MILLENNIUM MANAGEMENT LLC$38M
- Schonfeld Strategic Advisors LLC$30M
Institutional holders
One row per tracked fund, largest reported value first. “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding. Rows marked stale are from an earlier filing than the security’s latest quarter — that fund is absent from the newest snapshot (position exited, or reported under a different name).
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| BlackRock, Inc. added | 132,727,776 | $57.5B | 19.7% | 2026-Q2 |
| STATE STREET CORP added | 60,704,130 | $26.3B | 9.0% | 2026-Q2 |
| Invesco Ltd. added | 52,319,973 | $22.7B | 7.8% | 2026-Q2 |
| VANGUARD CAPITAL MANAGEMENT LLC new | 81,155,744 | $17.3B | 6.0% | 2026-Q1 |
| FMR LLC added | 33,677,858 | $14.6B | 5.0% | 2026-Q2 |
| PRICE T ROWE ASSOCIATES INC /MD/ added | 24,596,295 | $10.7B | 3.7% | 2026-Q2 |
| VANGUARD PORTFOLIO MANAGEMENT LLC new | 37,060,963 | $7.9B | 2.7% | 2026-Q1 |
| NORGES BANK trimmed | 18,123,399 | $7.9B | 2.7% | 2026-Q2 |
| GEODE CAPITAL MANAGEMENT, LLC added | 35,175,926 | $7.5B | 2.6% | 2026-Q1 |
| JPMORGAN CHASE & CO added | 32,712,933 | $6.5B | 2.2% | 2026-Q1 |
| AMERIPRISE FINANCIAL INC trimmed | 20,788,130 | $4.4B | 1.5% | 2026-Q1 |
| COATUE MANAGEMENT LLC trimmed | 9,441,603 | $4.1B | 1.4% | 2026-Q2 |
| MORGAN STANLEY trimmed | 18,971,122 | $4.1B | 1.4% | 2026-Q1 |
| NORTHERN TRUST CORP trimmed | 14,189,351 | $3.0B | 1.0% | 2026-Q1 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC added | 13,424,016 | $2.9B | 1.0% | 2026-Q1 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP trimmed | 13,179,818 | $2.8B | 1.0% | 2026-Q1 |
| FRANKLIN RESOURCES INC added | 11,793,519 | $2.5B | 0.9% | 2026-Q1 |
| Grantham, Mayo, Van Otterloo & Co. LLC trimmed | 5,464,726 | $2.4B | 0.8% | 2026-Q2 |
| Legal & General Group Plc added | 11,050,912 | $2.4B | 0.8% | 2026-Q1 |
| Nuveen, LLC added | 11,006,627 | $2.4B | 0.8% | 2026-Q1 |
| BANK OF AMERICA CORP /DE/ trimmed | 10,659,658 | $2.3B | 0.8% | 2026-Q1 |
| GOLDMAN SACHS GROUP INC trimmed | 10,477,727 | $2.2B | 0.8% | 2026-Q1 |
| Amundi added | 10,147,479 | $2.2B | 0.7% | 2026-Q1 |
| JANUS HENDERSON GROUP PLC added | 9,265,026 | $2.0B | 0.7% | 2026-Q1 |
| Bank of New York Mellon Corp trimmed | 8,932,438 | $1.9B | 0.7% | 2026-Q1 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC added | 7,767,896 | $1.7B | 0.6% | 2026-Q1 |
| VANGUARD FIDUCIARY TRUST CO new | 7,207,173 | $1.5B | 0.5% | 2026-Q1 |
| AQR CAPITAL MANAGEMENT LLC added | 3,485,364 | $1.5B | 0.5% | 2026-Q2 |
| UBS Group AG trimmed | 6,526,433 | $1.4B | 0.5% | 2026-Q1 |
| TIGER GLOBAL MANAGEMENT LLC trimmed | 3,163,495 | $1.4B | 0.5% | 2026-Q2 |
| DIMENSIONAL FUND ADVISORS LP added | 6,312,616 | $1.3B | 0.5% | 2026-Q1 |
| NORDEA INVESTMENT MANAGEMENT AB trimmed | 6,189,689 | $1.3B | 0.4% | 2026-Q1 |
| California Public Employees Retirement System added | 5,870,899 | $1.3B | 0.4% | 2026-Q1 |
| BARCLAYS PLC trimmed | 5,665,732 | $1.2B | 0.4% | 2026-Q1 |
| WELLS FARGO & COMPANY/MN trimmed | 5,141,784 | $1.1B | 0.4% | 2026-Q1 |
| Artisan Partners Limited Partnership trimmed | 5,029,666 | $1.1B | 0.4% | 2026-Q1 |
| DEUTSCHE BANK AG\ trimmed | 4,499,280 | $961M | 0.3% | 2026-Q1 |
| FIRST TRUST ADVISORS LP trimmed | 4,225,554 | $903M | 0.3% | 2026-Q1 |
| VOYA INVESTMENT MANAGEMENT LLC trimmed | 3,982,286 | $850M | 0.3% | 2026-Q1 |
| ALKEON CAPITAL MANAGEMENT LLC trimmed | 3,900,456 | $833M | 0.3% | 2026-Q1 |
| Swiss National Bank added | 3,686,200 | $788M | 0.3% | 2026-Q1 |
| CITIGROUP INC added | 3,608,466 | $771M | 0.3% | 2026-Q1 |
| Swedbank AB trimmed | 3,588,587 | $767M | 0.3% | 2026-Q1 |
| Capital Research Global Investors trimmed | 1,702,812 | $738M | 0.3% | 2026-Q2 |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. added | 3,444,139 | $736M | 0.3% | 2026-Q1 |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ trimmed | 3,309,521 | $726M | 0.2% | 2026-Q1 |
| HSBC HOLDINGS PLC trimmed | 3,391,189 | $723M | 0.2% | 2026-Q1 |
| JENNISON ASSOCIATES LLC added | 3,373,306 | $721M | 0.2% | 2026-Q1 |
| National Pension Service added | 3,364,610 | $719M | 0.2% | 2026-Q1 |
| AMERICAN CENTURY COMPANIES INC added | 3,282,745 | $701M | 0.2% | 2026-Q1 |
| Mitsubishi UFJ Asset Management Co., Ltd. added | 3,167,860 | $677M | 0.2% | 2026-Q1 |
| Sumitomo Mitsui Trust Group, Inc. trimmed | 3,099,313 | $662M | 0.2% | 2026-Q1 |
| TD Asset Management Inc added | 3,056,874 | $653M | 0.2% | 2026-Q1 |
| ROYAL BANK OF CANADA trimmed | 3,046,507 | $651M | 0.2% | 2026-Q1 |
| ACADIAN ASSET MANAGEMENT LLC added | 2,991,882 | $639M | 0.2% | 2026-Q1 |
| Allianz Asset Management GmbH trimmed | 2,957,819 | $632M | 0.2% | 2026-Q1 |
| Pictet Asset Management Holding SA trimmed | 2,905,362 | $620M | 0.2% | 2026-Q1 |
| CITADEL ADVISORS LLC added | 1,420,975 | $616M | 0.2% | 2026-Q2 |
| ENVESTNET ASSET MANAGEMENT INC trimmed | 2,859,751 | $611M | 0.2% | 2026-Q1 |
| CANADA PENSION PLAN INVESTMENT BOARD added | 2,847,498 | $608M | 0.2% | 2026-Q1 |
| Vanguard Global Advisers, LLC new | 2,740,832 | $586M | 0.2% | 2026-Q1 |
| PNC FINANCIAL SERVICES GROUP, INC. trimmed | 2,639,909 | $564M | 0.2% | 2026-Q1 |
| Focus Partners Wealth added | 2,525,689 | $542M | 0.2% | 2026-Q1 |
| NATIONAL BANK OF CANADA /FI/ added | 2,474,441 | $529M | 0.2% | 2026-Q1 |
| WELLINGTON MANAGEMENT GROUP LLP added | 1,215,581 | $527M | 0.2% | 2026-Q2 |
| ALLIANCEBERNSTEIN L.P. trimmed | 2,966,378 | $508M | 0.2% | 2026-Q1 |
| SANDS CAPITAL MANAGEMENT, LLC added | 1,133,965 | $491M | 0.2% | 2026-Q2 |
| RHUMBLINE ADVISERS trimmed | 2,297,150 | $491M | 0.2% | 2026-Q1 |
| BNP PARIBAS FINANCIAL MARKETS trimmed | 2,266,862 | $484M | 0.2% | 2026-Q1 |
| OAKTOP CAPITAL MANAGEMENT II, L.P. trimmed | 2,249,394 | $481M | 0.2% | 2026-Q1 |
| DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main added | 2,243,923 | $479M | 0.2% | 2026-Q1 |
| Bank Julius Baer & Co. Ltd, Zurich added | 2,211,855 | $466M | 0.2% | 2026-Q1 |
| VANGUARD ASSET MANAGEMENT, Ltd new | 2,182,915 | $466M | 0.2% | 2026-Q1 |
| VAN ECK ASSOCIATES CORP trimmed | 2,166,541 | $463M | 0.2% | 2026-Q1 |
| Russell Investments Group, Ltd. added | 2,144,089 | $452M | 0.2% | 2026-Q1 |
| Assenagon Asset Management S.A. added | 2,116,233 | $452M | 0.2% | 2026-Q1 |
| Robeco Institutional Asset Management B.V. trimmed | 2,060,775 | $440M | 0.2% | 2026-Q1 |
| CINCINNATI INSURANCE CO trimmed | 2,034,770 | $435M | 0.1% | 2026-Q1 |
| BANK OF MONTREAL /CAN/ added | 2,021,976 | $432M | 0.1% | 2026-Q1 |
| ProShare Advisors LLC trimmed | 1,961,746 | $419M | 0.1% | 2026-Q1 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM trimmed | 1,922,942 | $411M | 0.1% | 2026-Q1 |
| Polar Capital Holdings Plc trimmed | 1,913,491 | $409M | 0.1% | 2026-Q1 |
| Bridgewater Associates, LP trimmed | 938,224 | $407M | 0.1% | 2026-Q2 |
| PRINCIPAL FINANCIAL GROUP INC trimmed | 1,839,740 | $393M | 0.1% | 2026-Q1 |
| Rafferty Asset Management, LLC trimmed | 1,785,457 | $381M | 0.1% | 2026-Q1 |
| POLEN CAPITAL MANAGEMENT LLC trimmed | 859,036 | $372M | 0.1% | 2026-Q2 |
| PRUDENTIAL FINANCIAL INC trimmed | 1,720,831 | $368M | 0.1% | 2026-Q1 |
| TRUIST FINANCIAL CORP trimmed | 1,712,540 | $366M | 0.1% | 2026-Q1 |
| RAYMOND JAMES FINANCIAL INC trimmed | 1,669,226 | $353M | 0.1% | 2026-Q1 |
| MACKENZIE FINANCIAL CORP trimmed | 1,617,352 | $346M | 0.1% | 2026-Q1 |
| SCHRODER INVESTMENT MANAGEMENT GROUP trimmed | 1,582,367 | $338M | 0.1% | 2026-Q1 |
| KBC Group NV added | 1,560,414 | $333M | 0.1% | 2026-Q1 |
| LORD, ABBETT & CO. LLC trimmed | 1,551,029 | $331M | 0.1% | 2026-Q1 |
| Temasek Holdings (Private) Ltd trimmed | 755,004 | $327M | 0.1% | 2026-Q2 |
| VICTORY CAPITAL MANAGEMENT INC trimmed | 1,518,911 | $325M | 0.1% | 2026-Q1 |
| Whale Rock Capital Management LLC trimmed | 742,638 | $322M | 0.1% | 2026-Q2 |
| LPL Financial LLC added | 1,482,642 | $317M | 0.1% | 2026-Q1 |
| NEUBERGER BERMAN GROUP LLC trimmed | 1,463,046 | $313M | 0.1% | 2026-Q1 |
| Universal- Beteiligungs- und Servicegesellschaft mbH trimmed | 1,429,231 | $305M | 0.1% | 2026-Q1 |
| VANGUARD GROUP INC added | 131,185,330 | $22.5B | 7.7% | 2025-Q4 stale |
Ownership over time
Tracked institutional holder count and total shares held by filing quarter (independent scales). The curated-era tail and any mid-ingest latest quarter are handled honestly — a partial quarter is not drawn as a collapse.
Reading this table
Funds hold the same stock for different reasons — an index fund “holds” almost everything, an active manager sizes a name to a mandate and a benchmark, and each fund entered at its own price and time. Because 13F is filed up to 45 days after quarter-end, every row is a backward-looking snapshot; a manager may have traded since. Share-class siblings (a company’s A and C shares) are rolled up to one line so a dual-class name is never double-counted. Compare like-for-like. A large holder is not an endorsement, and a fund exiting is not a warning — this is a starting question, not a verdict.
About 13F filings
A Form 13F is a quarterly disclosure that institutional investment managers with over $100 million in US-listed equities must file with the SEC. In plain English: it is a snapshot of the long stock positions a fund held at the end of a quarter. It covers long US-listed equities only — not short positions, options, cash, or private holdings — and the funds shown are the large sample we track, not the complete 13F universe.