Lam Research: which funds bought and sold

Institutions that bought and sold Lam Research shares in Q2 2026, from the holdings they reported to the SEC on Form 13F for March 31, 2026 and June 30, 2026.

Between March 31, 2026 and June 30, 2026, 1,636 institutions that filed 13F reports for both quarters added to or opened positions in Lam Research, and 1,244 cut or closed them. Together they added a net 18.1M shares, +1.8% on what they held at the start of the quarter. Active managers and hedge funds on our list were net sellers of 4.9M shares (−3.0%); index fund managers were net buyers of 1.1M shares (+0.3%). 575 opened a new position and 92 sold out entirely.

Bought, Q2 2026 1,636 institutions, 575 of them new holders Sold, Q2 2026 1,244 institutions, 92 of them sold out

Net change, all compared +18.1M shares (+1.8%)

Net change, active managers −4.9M shares (−3.0%), 58 bought, 83 sold

Buyers versus sellers

institutions compared, 3,141

1,636 bought 261 1,244 sold

Active managers and hedge funds 58 bought · 83 sold · −4.9M

Index fund managers 4 bought · 8 sold · +1.1M

Other institutions 1,574 bought · 1,153 sold · +21.9M

Biggest buyers

by change in shares held

Biggest buyers
Institution	Change in shares	Shares June 30, 2026	Value
Jpmorgan Chase & Co	+12.6M +38.5%	45.3M	$18.6B
Price T Rowe Associates Inc Active manager	+11.4M +85.8%	24.6M	$10.7B
Van Eck Associates Corp	+8.9M +411.8%	11.1M	$4.8B
Goldman Sachs Group Inc	+2.2M +21.4%	12.7M	$5.5B
Wells Fargo & Company	+2.2M +42.2%	7.3M	$3.2B
SG Americas Securities, LLC	+2.0M +185.8%	3.1M	$1.3B
Invesco Ltd.	+1.9M +3.7%	52.3M	$22.7B
Nomura Asset Management International Inc.	+1.7M +8727.9%	1.7M	$724M
State Street Corp Index funds	+1.5M +2.6%	60.7M	$26.3B
Franklin Resources Inc Active manager	+1.3M +10.8%	13.1M	$5.7B
UBS Group AG	+1.2M +17.8%	7.7M	$3.3B
Swedbank AB	+1.1M +29.6%	4.6M	$2B
Rafferty Asset Management, LLC Index funds	+989K +55.4%	2.8M	$1.2B
Wellington Management Group LLP Active manager	+905K +291.2%	1.2M	$527M
Anther Capital Ltd	+741K +144.3%	1.3M	$544M
Canada Pension Plan Investment Board	+712K +25.0%	3.6M	$1.5B
Caisse De Depot Et Placement Du Quebec	+683K +89.3%	1.4M	$627M
AGF Management Ltd	+660K +9911.0%	667K	$289M
Bank Of Nova Scotia	+659K +70.2%	1.6M	$693M
BNP Paribas Financial Markets	+603K +26.6%	2.9M	$1.2B

Biggest buyers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
Price T Rowe Associates Inc Active manager	+11.4M +85.8%	24.6M	$10.7B
Franklin Resources Inc Active manager	+1.3M +10.8%	13.1M	$5.7B
Wellington Management Group LLP Active manager	+905K +291.2%	1.2M	$527M
Polar Capital Holdings PLC Active manager	+445K +23.3%	2.4M	$1B
Winslow Capital Management, LLC Active manager	+430K +2944.5%	444K	$192M
Dorsal Capital Management, LP Hedge fund	+400K New position	400K	$173M
Altimeter Capital Management, LP Hedge fund	+394K New position	394K	$171M
Palestra Capital Management LLC Hedge fund	+389K New position	389K	$169M
Sands Capital Management, LLC Active manager	+379K +50.1%	1.1M	$491M
Citadel Advisors LLC Hedge fund	+306K +27.5%	1.4M	$616M

Biggest sellers

by change in shares held

Biggest sellers
Institution	Change in shares	Shares June 30, 2026	Value
Artisan Partners Limited Partnership Active manager	−4.2M −84.4%	786K	$341M
Ameriprise Financial Inc	−3.5M −16.6%	17.3M	$7.5B
California Public Employees Retirement System	−2.2M −37.9%	3.6M	$1.6B
Massachusetts Financial Services Co Active manager	−2.1M −63.2%	1.2M	$540M
Nuveen, LLC	−1.8M −16.2%	9.2M	$4B
Grantham, Mayo, Van Otterloo & Co. LLC Active manager	−1.4M −20.8%	5.5M	$2.4B
Two Sigma Investments, LP Hedge fund	−1.3M −85.0%	225K	$97.6M
Nordea Investment Management AB	−1.2M −19.8%	5.0M	$2.1B
Assenagon Asset Management S.A.	−1.1M −50.9%	1.0M	$450M
National Bank Of Canada	−1.0M −41.5%	1.4M	$627M
Value Aligned Research Advisors, LLC	−979K −89.0%	122K	$52.7M
BNP Paribas Asset Management Holding S.A.	−953K −27.7%	2.5M	$1.1B
Arrowstreet Capital, Limited Partnership Hedge fund	−911K −6.9%	12.3M	$5.3B
UBS Am, A Distinct Business Unit Of UBS Asset Management Americas LLC	−909K −6.8%	12.5M	$5.4B
Capital Research Global Investors Active manager	−902K −34.6%	1.7M	$738M
Acadian Asset Management LLC Active manager	−901K −30.1%	2.1M	$906M
Millennium Management LLC Hedge fund	−892K −56.2%	696K	$302M
Focus Partners Wealth	−883K −35.0%	1.6M	$712M
Alkeon Capital Management LLC Hedge fund	−850K −21.8%	3.1M	$1.3B
D. E. Shaw & Co., Inc. Hedge fund	−740K −78.2%	206K	$89.4M

Biggest sellers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
Artisan Partners Limited Partnership Active manager	−4.2M −84.4%	786K	$341M
Massachusetts Financial Services Co Active manager	−2.1M −63.2%	1.2M	$540M
Grantham, Mayo, Van Otterloo & Co. LLC Active manager	−1.4M −20.8%	5.5M	$2.4B
Two Sigma Investments, LP Hedge fund	−1.3M −85.0%	225K	$97.6M
Arrowstreet Capital, Limited Partnership Hedge fund	−911K −6.9%	12.3M	$5.3B
Capital Research Global Investors Active manager	−902K −34.6%	1.7M	$738M
Acadian Asset Management LLC Active manager	−901K −30.1%	2.1M	$906M
Millennium Management LLC Hedge fund	−892K −56.2%	696K	$302M
Alkeon Capital Management LLC Hedge fund	−850K −21.8%	3.1M	$1.3B
D. E. Shaw & Co., Inc. Hedge fund	−740K −78.2%	206K	$89.4M

New positions

largest by value

Institution	Shares	Value June 30, 2026
Cardano Risk Management B.V.	536K	$232M
Wt Asset Management Ltd	493K	$214M
Dorsal Capital Management, LPHedge fund	400K	$173M
Altimeter Capital Management, LPHedge fund	394K	$171M
Palestra Capital Management LLCHedge fund	389K	$169M
Westfield Capital Management Co LPActive manager	286K	$124M
Cloudalpha Capital Management Limited/Hong Kong	271K	$117M
Capital World InvestorsActive manager	260K	$112M
Think Investments LP	143K	$61.9M
Harvest Portfolios Group Inc.	115K	$49.9M

Sold out

largest by value

Institution	Shares	Value March 31, 2026
Maplelane Capital, LLCHedge fund	621K	$133M
Voloridge Investment Management, LLCHedge fund	608K	$130M
Rakuten Investment Management, Inc.	288K	$57.6M
Seven Grand Managers, LLC	264K	$56.4M
Quadrature Capital LtdHedge fund	192K	$41M
Natixis	184K	$39.2M
Junto Capital Management LPHedge fund	166K	$35.5M
Nearwater Capital Markets, Ltd	118K	$25.2M
M & L Capital Management Ltd	78K	$16.7M
Third Point LLCHedge fund	75K	$16M

Who holds the shares

13F holdings at June 30, 2026

Institutions reporting: 3,097
Ten largest holders: 48.5%
Index fund managers: 35.6%
Active managers and hedge funds: 14.5%

Buying and selling by type of institution, March 31, 2026 to June 30, 2026
Type	Bought	Sold	New	Sold out	Net change in shares	Net %
Active managers and hedge funds	58	83	18	10	−4.9M	−3.0%
Index fund managers	4	8	0	0	+1.1M	+0.3%
Other institutions	1,574	1,153	557	82	+21.9M	+4.5%

Active managers and hedge funds: a list we maintain of about 400 well-known stock-picking firms and hedge funds, matched by SEC registration number (CIK) and checked against the filer names each quarter. Index fund managers: the large index houses, such as BlackRock, Vanguard, State Street, Geode and Northern Trust. Every other filer (banks, brokers, wealth managers, pension funds, insurers and firms not on the list) counts as another institution. A firm that files under several SEC registrations appears once for each.

What these filings can and cannot tell you

Form 13F lists the long positions in US-listed shares held by investment managers with more than $100 million in such holdings. Managers file it up to 45 days after each quarter ends, so this page shows what funds held at the end of each quarter, not what they are doing now: a position may have changed since. Short positions, most derivatives and smaller managers are not included, and a cut can mean a fund lost clients or rebalanced rather than a view on Lam Research.

Only managers that filed a holdings report for both quarters are compared (3,141 here). 94 other holders are left out: first-time or late filers, firms that changed their SEC registration, and filings that withheld positions under confidential treatment, any of which would otherwise look like a new position or a sale. Figures are as reported by each manager in the SEC's quarterly 13F data sets; option positions are excluded.

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