Lam Research Corporation
Lam Research Corporation (LRCX) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · LRCX · as of Sep 30, 2025
Ownership Breakdown
2,164
Institutional Holders
▲ 227 vs Q2
$136.21B
Total Inst. Value
▲ $33.69B vs Q2
1.25B
Shares Outstanding
freeFloat 99.60%
1.02B
13F Shares Held
▼ 36.46M vs Q2
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
LRCX largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
VANGUARD GROUP INC special industry machinery, nec | 130.97M | 10.28% | 10.28% | $17.54T | Nov 7, 2025 | ▲ 364.9K |
BLACKROCK, INC. special industry machinery, nec | 124.26M | 9.75% | 9.75% | $16.64T | Nov 12, 2025 | ▲ 2.06M |
STATE STREET CORP special industry machinery, nec | 59.82M | 4.69% | 4.69% | $8.02T | Nov 14, 2025 | ▲ 265.8K |
GEODE CAPITAL MANAGEMENT, LLC special industry machinery, nec | 33.62M | 2.64% | 2.64% | $4.49T | Nov 12, 2025 | ▼ 182.0K |
JPMORGAN CHASE & CO special industry machinery, nec | 29.94M | 2.35% | 2.35% | $4.01T | Nov 26, 2025 | ▼ 10.68M |
AMERIPRISE FINANCIAL INC special industry machinery, nec | 25.32M | 1.99% | 1.99% | $3.39T | Nov 14, 2025 | ▼ 5.13M |
FMR LLC special industry machinery, nec | 23.35M | 1.83% | 1.83% | $3.13T | Nov 13, 2025 | ▼ 2.30M |
INVESCO LTD. special industry machinery, nec | 21.18M | 1.66% | 1.66% | $2.84T | Nov 13, 2025 | ▲ 3.26M |
MORGAN STANLEY special industry machinery, nec | 19.86M | 1.56% | 1.56% | $2.66T | May 27, 2026 | ▲ 797.9K |
NORTHERN TRUST CORP special industry machinery, nec | 14.58M | 1.14% | 1.14% | $1.95T | Nov 14, 2025 | ▲ 3.4K |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q3 2025 vs prior quarter
Q3 2025
28
Increased
+35.06M shares0
New Positions
first time holders21
Decreased
−37.24M shares0
Sold Out
fully exitedNet shares change (top 50)
2.18M
+35.06M / −37.24M
Net new holders
+7
0 new / 0 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
LRCX insider trading · insider activity
Source: SEC Form 4
Insiders have been primarily selling shares recently. Selling may be driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment.
1
Buy transactions
4
Sell transactions
0.25
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
Fernandes Neil J Senior Vice President | Jun 1, 2026 | Sale | 7,659 | $309.60 | $2.37M | 58.5K | Form 4 ↗ |
Fernandes Neil J Senior Vice President | May 1, 2026 | Sale | 18,170 | $255.14 | $4.64M | 66.1K | Form 4 ↗ |
Harter Ava Chief Legal Officer | Apr 27, 2026 | Sale | 6,010 | $258.66 | $1.55M | 53.2K | Form 4 ↗ |
TALWALKAR ABHIJIT Y director | Mar 10, 2026 | Gift | 4,571 | — | — | 105.4K | Form 4 ↗ |
Bettinger Douglas R Chief Financial Officer & EVP | Mar 4, 2026 | Sale | 50,057 | $224.03 | $11.21M | 1.08M | Form 4 ↗ |
Harter Ava Chief Legal Officer | Mar 4, 2026 | Sale | 1,500 | $222.66 | $334.0K | 53.2K | Form 4 ↗ |
Bettinger Douglas R Chief Financial Officer & EVP | Mar 2, 2026 | Sale | 40,329 | $230.22 | $9.28M | 1.05M | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
Lam Research Corporation (LRCX) is primarily owned by institutional investors, who hold approximately 81.3% of total shares outstanding. Company insiders own approximately 0.40%, while retail and public investors account for the remaining 18.26%.
The largest institutional shareholder of Lam Research Corporation is VANGUARD GROUP INC, holding approximately 130.97 million shares — equal to 10.28% of outstanding shares — as of September 30, 2025.
A total of 2,164 institutional investors currently hold LRCX stock, with a combined institutional value of approximately $136.21 billion as of the most recent 13F filing period.
Frequently asked questions
LRCX ownershipLam Research Corporation (LRCX) is primarily owned by institutional investors, who hold approximately 81.3% of shares. The largest shareholder is VANGUARD GROUP INC with a 10.28% stake. Company insiders hold 0.40%. Data sourced from SEC Form 13F as of September 30, 2025.