Illumina
ILMN · NASDAQ
Who owns ILMN
Largest institutional holders, from their latest 13F filings
The 10 largest institutions hold 45.7% of ILMN’s shares.
- Capital World Investors10.2%
- BlackRock Institutional Trust Company, N.A.9.0%
- Vanguard Portfolio Management, LLC4.4%
- Vanguard Capital Management, LLC4.4%
- Next 6 largest institutions17.7%
- All other shareholders54.3%
| Holder | Shares | % of shares |
|---|---|---|
| Capital World Investors | 15.43M | 10.20% |
| BlackRock Institutional Trust Company, N.A. | 13.60M | 8.99% |
| Vanguard Portfolio Management, LLC | 6.63M | 4.38% |
| Vanguard Capital Management, LLC | 6.59M | 4.35% |
| State Street Investment Management (US) | 6.51M | 4.30% |
| WCM Investment Management | 6.21M | 4.10% |
| Fidelity Management & Research Company LLC | 4.13M | 2.73% |
| AQR Capital Management, LLC | 3.54M | 2.34% |
| PRIMECAP Management Company | 3.51M | 2.32% |
| Geode Capital Management, L.L.C. | 2.95M | 1.95% |
Largest mutual fund holders
| Holder | Shares | % of shares |
|---|---|---|
| iShares Core S&P Mid-Cap ETF | 5.30M | 3.50% |
| Vanguard Total Stock Market Index Fund | 4.58M | 3.03% |
| American Funds American Balanced Fund | 3.49M | 2.30% |
| Vanguard Small-Cap Index Fund | 3.30M | 2.18% |
| American Funds Growth Fund of America | 2.74M | 1.81% |
Insider trades
Form 4 filings by officers, directors and large holders
Over the last 6 months, insiders sold $592.32M (108 trades) of ILMN on the open market, with no buys.
| Insider | Type | Shares | Value |
|---|---|---|---|
| Thaysen Jacob | Tax withholding | 1.30K | $382.68K |
| Meister Keith A. | Award | 107 | $23.52K |
| Ullem Scott B. | Award | 113 | $24.84K |
| Coletti Julie Ann | Award | 5.31K | — |
| Coletti Julie Ann | Award | 5.31K | — |
| Coletti Julie Ann | Award | 14.21K | — |
| Coletti Julie Ann | Award | 4.55K | — |
| Barnard Steven | Tax withholding | 408 | $86.11K |
| Meister Keith A. | Sale | 11.35K | $2.49M |
| Meister Keith A. | Sale | 100.65K | $21.98M |
Congressional trades
Disclosed by members of Congress over the last 12 months
| Member | Type | Amount | Traded |
|---|---|---|---|
| Gil CisnerosHouse | Purchase | $1K–$15K | Feb 10, 2026 |
| Lisa McClainHouse | Sale | $1K–$15K | Oct 31, 2025 |
| Lisa McClainHouse | Sale | $1K–$15K | Oct 30, 2025 |
Short interest
Settled Sep 30, 2026
- Shares short
- 9.47M
- Days to cover
- 1.63
- % of shares outstanding
- 6.26%
- Average daily volume
- 5.80M
- Change since last report
- −10.5%
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