13F Insight
DOSSIER · 13F Holders · Q3 2026

LAM RESEARCH CORP

16 institutions still hold LAM RESEARCH CORP as of Q3 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 512807906·16 13F holders·last filed Sep 30, 2026
Market cap
—
13F value held
$2.2B
visible holders
Holders
16
filers reporting
Concentration
35.98%
IMC-Chicago, LLC #1
top holder share
AI Holders Summary · Q3 2026

16 institutions reported LAM RESEARCH CORP in Q3 2026. IMC-Chicago, LLC leads at 36.0% of the visible book.

Top holders

Sorted by position value. Source: SEC EDGAR 13F-HR filings.

#HolderValueShares% port.Quarter
01
IMC-Chicago, LLC
CIK 0001452861· Market maker
$778M2.4M0.16%Q3 202602
Optiver Holding B.V.
CIK 0001859606· Market maker
$747M1.7M0.20%Q2 202603
JPMORGAN CHASE & CO
CIK 0000019617
$155M477K0.01%Q3 202604
SIMPLEX TRADING, LLC
CIK 0001488542
$145M443K0.08%Q3 202605
GROUP ONE TRADING LLC
CIK 0000932540
$145M441K0.20%Q3 202606
NATIONAL BANK OF CANADA /FI/
CIK 0000926171
$128M3K0.09%Q2 202607
CIBC Bancorp USA Inc.
CIK 0001711924
$19M45K0.02%Q2 202608
CMT Capital Markets Trading GmbH
CIK 0001632813
$15M71K0.16%Q1 202609
SG Americas Securities, LLC
CIK 0001313360
$12M311K0.01%Q1 202610
Maven Securities LTD
CIK 0001633046
$7M16K0.14%Q2 202611
HRT FINANCIAL LP
CIK 0001475597
$6M36K0.02%Q4 202512
Capital Markets Trading UK LLP
CIK 0001719165
$4M18K0.05%Q1 202613
OSAIC HOLDINGS, INC.
CIK 0001677044
$131K50.00%Q3 202614
Orion Capital Management LLC
CIK 0001846758
$130K3000.04%Q2 202615
Cane Capital Partners, LLC
CIK 0002086121
$59K5000.02%Q3 202616
CONCOURSE FINANCIAL GROUP SECURITIES, INC.
CIK 0000752798
$00—Q2 2025