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LRCX · Lam Research Corp

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Market Cap
$363.18B
Shares
1.25B

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Holders: 3,128
Total Value: $485,812,347,607
Total Shares: 1,121,204,380
Showing 1–100 of 3,239 holdings by value · page 1 of 33

Institutional Ownership Trend

26 quarters

Holder Concentration

Across 3,128 13F filers · Δ vs Mar 31, 2026
Top Holder
11.8%
Sep 2023 → Jun 2026 · range 10.0% – 12.7%
−0.9 pts
Top 5
33.3%
Sep 2023 → Jun 2026 · range 32.0% – 38.0%
+0.2 pts
Top 10
46.5%
Sep 2023 → Jun 2026 · range 44.5% – 50.3%
+1.0 pts
HHI
327
Sep 2023 → Jun 2026 · range 314 – 424
Broadly held−10

Quarterly Activity

vs Mar 31, 2026
New
615
Increased
1,076
Decreased
1,170
Sold Out
144
Unchanged
267
Holder count: +471
Institutional value: +117.4%
Shares held: +7.1%

Top Buyers

vs Mar 31, 2026
Institution Added Now Holds Open

Top Sellers

vs Mar 31, 2026
Institution Sold Now Holds Open

Top New Positions

vs Mar 31, 2026
Institution Acquired Value (USD) Open

Top Sold-Out Positions

vs Mar 31, 2026
Institution Previously Held Last Value (USD) Open
Showing 100 of 3,239
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Holder Value (USD) % of 13F Shares Open
Key facts CIK 707549 CUSIP 512807306 13F (30d) 1500 filings 1445 filers Visit website Investor relations