NASDAQ · Healthcare · Holders
Illumina Inc. (ILMN) Institutional Ownership & Insider Trading History
Top ILMN institutional shareholders, filing changes, and Form 4 insider activity with filters for buys, sales, option exercises, gifts, and tax withholding.
- Last confirmed price
- $269.42+0.01%
- Oct 23, 2026, 4:00 PM EDT · Prices may be delayed
Data dates
Prices as of Oct 23, 4:00 PM EDT · Fundamentals checked Oct 25, 12:02 AM EDT · Statement period ended Jun 28, 2026
Ownership read
ILMN insider transaction activity: Mixed, sale-heavy.
Blackrock Inc. is the largest institutional holder. 18 classified sales and 4 classified purchases appear in the recent insider records. 6 transactions lack a reliable action code. Use the filters below to separate open-market activity from option exercises, gifts, awards, and tax withholding.
Insider flow
ILMN
Directional bars ignore awards, gifts, conversions, and tax withholding rows.
Top holder
19.19M
Blackrock Inc.
Insider transaction activity
Mixed, sale-heavy
$592.86M sold / $1.58M bought · 6 unclassified
Observations shown
90
10 holder / 80 insider
- Increased / initiated
- Unavailable
- Prior positions were not supplied
- Insider rows
- 80
- Transaction dates shown per row
Ownership concentration and transaction activity
- Top 10 reported holders
- 49.73% outstanding
- Changes with share-count history
- Prior-position data unavailable
- New / exited positions
- Prior-position data unavailable
- Largest increase with share-count history
- Prior share counts unavailable
These changes cover the holders shown. A holder missing from this list may still own shares. Compare positions from the same reporting quarters.
Net shares sold: 3,051,831
Sale-code S shares minus purchase-code P shares in this sample. Includes disclosed plans and unknown plan status; excludes grants, gifts, exercises and withholding. This is activity, not sentiment.
- Grant: 49
- Purchase / sale; plan unknown: 22
- Conversion / exercise: 3
- Other / unclassified: 6
Top 10 institutional holders
Illumina Inc. (ILMN) institutional ownership
Ranked by reported share count, with position changes and separate position and filing dates where ownership data supplies them.
| # | Institution | % held | Shares | Position / filing date |
|---|---|---|---|---|
| 1 | 12.7% | 19.19M | Position as of Jun 30, 2026Filing date unknown | |
| 2 | 10.2% | 15.43M | Position as of Jun 30, 2026Filing date unknown | |
| 3 | 4.39% | 6.63M | Position as of Jun 30, 2026Filing date unknown | |
| 4 | 4.36% | 6.59M | Position as of Jun 30, 2026Filing date unknown | |
| 5 | 4.31% | 6.51M | Position as of Jun 30, 2026Filing date unknown | |
| 6 | WCM Investment Management, LLC | 4.11% | 6.21M | Position as of Jun 30, 2026Filing date unknown |
| 7 | 3.00% | 4.52M | Position as of Jun 30, 2026Filing date unknown | |
| 8 | AQR Capital Management, LLC | 2.35% | 3.54M | Position as of Jun 30, 2026Filing date unknown |
| 9 | Primecap Management Company | 2.33% | 3.51M | Position as of Jun 30, 2026Filing date unknown |
| 10 | 1.95% | 2.95M | Position as of Jun 30, 2026Filing date unknown |
Recent insider transactions
Illumina Inc. (ILMN) Form 4 filings
Action codes are translated so open-market buys and sales are separate from awards, gifts, conversions, and tax withholding. Window: Dec 31, 2024–Sep 8, 2026 · 80 records.
| # | Insider | % company | Action | Shares | Price | Value | Transaction / filing |
|---|---|---|---|---|---|---|---|
| 1 | COLETTI JULIE ANN Officer | 0.01% | Award / grantAward, grant, or acquisition under an equity compensation plan.Transaction context
Position sold = shares sold ÷ (shares sold + holdings after). Separate accounts or security classes may not represent total beneficial ownership. | 18.76K | No cash value | No cash value | Sep 8, 2026Filing date unavailableOriginal filing link unavailable |
| 2 | MEISTER KEITH A Director | 0.17% | SaleOpen-market or direct sale reported on Form 4.Transaction context
Position sold = shares sold ÷ (shares sold + holdings after). Separate accounts or security classes may not represent total beneficial ownership. | 263.56K | $217.03 | $57,199,201 | Sep 4, 2026Filing date unavailableOriginal filing link unavailable |
| 3 | MEISTER KEITH A Director | 0.25% | SaleOpen-market or direct sale reported on Form 4.Transaction context
Position sold = shares sold ÷ (shares sold + holdings after). Separate accounts or security classes may not represent total beneficial ownership. | 375.94K | $226.74 | $85,241,664 | Aug 27, 2026Filing date unavailableOriginal filing link unavailable |
| 4 | MEISTER KEITH A Director | 0.45% | SaleOpen-market or direct sale reported on Form 4.Transaction context
Position sold = shares sold ÷ (shares sold + holdings after). Separate accounts or security classes may not represent total beneficial ownership. | 679.57K | $214.19 | $145,556,398 | Aug 21, 2026Filing date unavailableOriginal filing link unavailable |
| 5 | WEDEL CHRISTENSEN JAKOB Officer | <0.01% | SaleOpen-market or direct sale reported on Form 4.Transaction context
Position sold = shares sold ÷ (shares sold + holdings after). Separate accounts or security classes may not represent total beneficial ownership. | 1.03K | $191.52 | $197,840 | Aug 18, 2026Filing date unavailableOriginal filing link unavailable |
| 6 | SULLIVAN MICHAEL C Officer | <0.01% | Award / grantAward, grant, or acquisition under an equity compensation plan.Transaction context
Position sold = shares sold ÷ (shares sold + holdings after). Separate accounts or security classes may not represent total beneficial ownership. | 4.50K | $199.87 | $900,015 | Aug 5, 2026Filing date unavailableOriginal filing link unavailable |
| 7 | MEISTER KEITH A Director | 0.49% | SaleOpen-market or direct sale reported on Form 4.Transaction context
Position sold = shares sold ÷ (shares sold + holdings after). Separate accounts or security classes may not represent total beneficial ownership. | 741.13K | $199.91 | $148,159,897 | Aug 5, 2026Filing date unavailableOriginal filing link unavailable |
| 8 | DAVIES SCOTT M Officer | <0.01% | SaleOpen-market or direct sale reported on Form 4.Transaction context
Position sold = shares sold ÷ (shares sold + holdings after). Separate accounts or security classes may not represent total beneficial ownership. | 615 | $200.00 | $123,000 | Jul 30, 2026Filing date unavailableOriginal filing link unavailable |
| 9 | MEISTER KEITH A Director | <0.01% | Award / grantAward, grant, or acquisition under an equity compensation plan.Transaction context
Position sold = shares sold ÷ (shares sold + holdings after). Separate accounts or security classes may not represent total beneficial ownership. | 142 | $149.19 | $21,185 | Jun 30, 2026Filing date unavailableOriginal filing link unavailable |
| 10 | ULLEM SCOTT B Director | <0.01% | Award / grantAward, grant, or acquisition under an equity compensation plan.Transaction context
Position sold = shares sold ÷ (shares sold + holdings after). Separate accounts or security classes may not represent total beneficial ownership. | 167 | $149.19 | $24,914 | Jun 30, 2026Filing date unavailableOriginal filing link unavailable |
| 11 | DAVIES SCOTT M Officer | <0.01% | SaleOpen-market or direct sale reported on Form 4.Transaction context
Position sold = shares sold ÷ (shares sold + holdings after). Separate accounts or security classes may not represent total beneficial ownership. | 615 | $180.00 | $110,700 | Jun 25, 2026Filing date unavailableOriginal filing link unavailable |
| 12 | SKOVRONSKY DANIEL Director | <0.01% | Award / grantAward, grant, or acquisition under an equity compensation plan.Transaction context
Position sold = shares sold ÷ (shares sold + holdings after). Separate accounts or security classes may not represent total beneficial ownership. | 1.67K | $164.28 | $275,005 | Jun 16, 2026Filing date unavailableOriginal filing link unavailable |
Frequently asked
Questions about this quote
Who are the largest ILMN shareholders?
Blackrock Inc. is the largest reported institutional holder of ILMN, with 19.19 million shares, or about 12.71% of shares outstanding.
What does the institutional filing activity show for ILMN?
Illumina Inc. has 10 institutional rows on file. Previous position sizes are unavailable, so increases and reductions cannot be determined.
What insider transactions are available for ILMN?
TECHi shows 80 dated ILMN insider transactions through Sep 8, 2026, with transaction types kept separate so administrative actions are not presented as open-market trades.
Are ILMN insiders buying or selling?
The displayed ILMN activity reads Mixed, sale-heavy: 18 sales and 4 purchases. Other transaction types remain separate.
Who is the most active reported ILMN insider?
MEISTER KEITH A has the largest absolute share movement in the displayed ILMN filing rows, totaling 3.43 million shares. The action labels provide the transaction context.
What this page answers
Check who owns the float and whether insiders are active.
Explore Institutional concentration, insider transaction pattern, and float context.
Keep in mind Filings are delayed or transactions are administrative rather than economic.
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