BLACKROCK
Rank #1
12.6%
- Shares
- 19.02M
- Change
- +701.91K
- Change %
- +3.83%
- Filing
- Mar 31, 2026
Increased
Methodology published · Market data, model notes, and corrections process are public · Data policy · Corrections policy
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.
Ownership read
ILMN insider sentiment: Net selling.
BLACKROCK is the largest loaded institutional holder. 58 sale rows and 0 purchase rows are visible in the loaded Form 4 history. Use the filters below to separate real buying and selling from option exercises, gifts, awards, and tax withholding.
Insider flow
ILMN
Purchases—
Sales2.08M
Directional bars ignore awards, gifts, conversions, and tax withholding rows.
Top holder
19.02M
BLACKROCK
Insider stance
Net selling
$181.94M sold / — bought
Latest filing
May 21, 2026
Most recent holder or insider filing date
Rows loaded
240
120 holder / 120 insider
- Holder rows
- 120
- Market data feed
- Latest filing
- May 21, 2026
- Most recent holder or insider filing date
- Increased / initiated
- 70
- 49 decreased in loaded rows
- Insider rows
- 120
- Market data feed
Top 120 institutional holders
Illumina Inc (ILMN) institutional ownership
Ranked by reported share count, with position changes and latest filing dates where the ownership feed supplies them.
CAPITAL WORLD INVESTORS
Rank #2
10.3%
- Shares
- 15.55M
- Change
- -4.55M
- Change %
- -22.64%
- Filing
- Mar 31, 2026
Decreased
VANGUARD GROUP INC
Rank #3
9.52%
- Shares
- 14.36M
- Change
- -272.50K
- Change %
- -1.86%
- Filing
- Dec 31, 2025
Decreased
VANGUARD PORTFOLIO MANAGEMENT LLC
Rank #4
4.53%
- Shares
- 6.82M
- Change
- +6.82M
- Change %
- —
- Filing
- Mar 31, 2026
Initiated
VANGUARD CAPITAL MANAGEMENT LLC
Rank #5
4.37%
- Shares
- 6.59M
- Change
- +6.59M
- Change %
- —
- Filing
- Mar 31, 2026
Initiated
STATE STREET CORP
Rank #6
4.26%
- Shares
- 6.43M
- Change
- +239.23K
- Change %
- +3.87%
- Filing
- Mar 31, 2026
Increased
WCM INVESTMENT MANAGEMENT
Rank #7
3.93%
- Shares
- 5.92M
- Change
- +1.85M
- Change %
- +45.48%
- Filing
- Mar 31, 2026
Increased
AQR CAPITAL MANAGEMENT LLC
Rank #8
2.64%
- Shares
- 3.98M
- Change
- -445.05K
- Change %
- -10.05%
- Filing
- Mar 31, 2026
Decreased
CORVEX MANAGEMENT LP
Rank #9
2.54%
- Shares
- 3.83M
- Change
- —
- Change %
- 0.00%
- Filing
- Mar 31, 2026
Unchanged
SESSA CAPITAL IM
Rank #10
2.17%
- Shares
- 3.28M
- Change
- -128.21K
- Change %
- -3.77%
- Filing
- Mar 31, 2026
Decreased
GEODE CAPITAL MANAGEMENT
Rank #11
2.02%
- Shares
- 3.05M
- Change
- +182.23K
- Change %
- +6.35%
- Filing
- Mar 31, 2026
Increased
LOOMIS SAYLES & CO L P
Rank #12
1.95%
- Shares
- 2.94M
- Change
- -1.23M
- Change %
- -29.45%
- Filing
- Mar 31, 2026
Decreased
INVESCO LTD.
Rank #13
1.76%
- Shares
- 2.66M
- Change
- -90.38K
- Change %
- -3.29%
- Filing
- Mar 31, 2026
Decreased
JANUS HENDERSON GROUP PLC
Rank #14
1.39%
- Shares
- 2.10M
- Change
- +29.09K
- Change %
- +1.40%
- Filing
- Mar 31, 2026
Increased
SOUTHPOINT CAPITAL ADVISORS LP
Rank #15
1.39%
- Shares
- 2.10M
- Change
- +349.54K
- Change %
- +19.97%
- Filing
- Mar 31, 2026
Increased
PRIMECAP MANAGEMENT CO
Rank #16
1.37%
- Shares
- 2.07M
- Change
- +77.62K
- Change %
- +3.90%
- Filing
- Mar 31, 2026
Increased
MORGAN STANLEY
Rank #17
1.22%
- Shares
- 1.84M
- Change
- -685.43K
- Change %
- -27.10%
- Filing
- Mar 31, 2026
Decreased
NORTHERN TRUST CORP
Rank #18
1.05%
- Shares
- 1.58M
- Change
- +35.01K
- Change %
- +2.27%
- Filing
- Mar 31, 2026
Increased
UBS AM
Rank #19
1.04%
- Shares
- 1.56M
- Change
- -24.33K
- Change %
- -1.53%
- Filing
- Mar 31, 2026
Decreased
FMR LLC
Rank #20
1.03%
- Shares
- 1.55M
- Change
- -147.49K
- Change %
- -8.71%
- Filing
- Mar 31, 2026
Decreased
| # | Institution | % held | Shares | Change | Change % | Filing date |
|---|---|---|---|---|---|---|
| 1 | 12.6% | 19.02M | +701.91K Increased | +3.83% | Mar 31, 2026 | |
| 2 | 10.3% | 15.55M | -4.55M Decreased | -22.64% | Mar 31, 2026 | |
| 3 | 9.52% | 14.36M | -272.50K Decreased | -1.86% | Dec 31, 2025 | |
| 4 | 4.53% | 6.82M | +6.82M Initiated | — | Mar 31, 2026 | |
| 5 | 4.37% | 6.59M | +6.59M Initiated | — | Mar 31, 2026 | |
| 6 | 4.26% | 6.43M | +239.23K Increased | +3.87% | Mar 31, 2026 | |
| 7 | WCM INVESTMENT MANAGEMENT | 3.93% | 5.92M | +1.85M Increased | +45.48% | Mar 31, 2026 |
| 8 | AQR CAPITAL MANAGEMENT LLC | 2.64% | 3.98M | -445.05K Decreased | -10.05% | Mar 31, 2026 |
| 9 | CORVEX MANAGEMENT LP | 2.54% | 3.83M | — Unchanged | 0.00% | Mar 31, 2026 |
| 10 | SESSA CAPITAL IM | 2.17% | 3.28M | -128.21K Decreased | -3.77% | Mar 31, 2026 |
| 11 | 2.02% | 3.05M | +182.23K Increased | +6.35% | Mar 31, 2026 | |
| 12 | LOOMIS SAYLES & CO L P | 1.95% | 2.94M | -1.23M Decreased | -29.45% | Mar 31, 2026 |
| 13 | 1.76% | 2.66M | -90.38K Decreased | -3.29% | Mar 31, 2026 | |
| 14 | JANUS HENDERSON GROUP PLC | 1.39% | 2.10M | +29.09K Increased | +1.40% | Mar 31, 2026 |
| 15 | SOUTHPOINT CAPITAL ADVISORS LP | 1.39% | 2.10M | +349.54K Increased | +19.97% | Mar 31, 2026 |
| 16 | PRIMECAP MANAGEMENT CO | 1.37% | 2.07M | +77.62K Increased | +3.90% | Mar 31, 2026 |
| 17 | 1.22% | 1.84M | -685.43K Decreased | -27.10% | Mar 31, 2026 | |
| 18 | 1.05% | 1.58M | +35.01K Increased | +2.27% | Mar 31, 2026 | |
| 19 | 1.04% | 1.56M | -24.33K Decreased | -1.53% | Mar 31, 2026 | |
| 20 | 1.03% | 1.55M | -147.49K Decreased | -8.71% | Mar 31, 2026 |
Showing 20 of 120 matching institutional rows.Load more institutions
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.
RICHO, ANNA
Director
- Shares
- 2.07K
- % company
- <0.01%
- Price
- $144.83
- Value
- $300,088
Filed May 21, 2026
KING, DAVID P
Director
- Shares
- 2.07K
- % company
- <0.01%
- Price
- $144.83
- Value
- $300,088
Filed May 21, 2026
SIEGEL, SUSAN E
Director
- Shares
- 2.07K
- % company
- <0.01%
- Price
- $144.83
- Value
- $300,088
Filed May 21, 2026
ULLEM, SCOTT B.
Director
- Shares
- 2.07K
- % company
- <0.01%
- Price
- $144.83
- Value
- $300,088
Filed May 21, 2026
DORSA, CAROLINE
Director
- Shares
- 2.07K
- % company
- <0.01%
- Price
- $144.83
- Value
- $300,088
Filed May 21, 2026
GOTTLIEB, SCOTT
Director
- Shares
- 2.07K
- % company
- <0.01%
- Price
- $144.83
- Value
- $300,088
Filed May 21, 2026
MEISTER, KEITH A.
Director
- Shares
- 2.07K
- % company
- <0.01%
- Price
- $144.83
- Value
- $300,088
Filed May 21, 2026
SCHILLER, PHILIP W
Director
- Shares
- 2.07K
- % company
- <0.01%
- Price
- $144.83
- Value
- $300,088
Filed May 21, 2026
DORSA, CAROLINE
Director
- Shares
- 1.51K
- % company
- <0.01%
- Price
- $141.92
- Value
- $214,583
Filed May 20, 2026
MEISTER, KEITH A.
Director
- Shares
- 52.78K
- % company
- 0.03%
- Price
- $144.80
- Value
- $7,641,965
Filed May 14, 2026
MEISTER, KEITH A.
Director
- Shares
- 12.31K
- % company
- <0.01%
- Price
- $144.13
- Value
- $1,774,096
Filed May 14, 2026
MEISTER, KEITH A.
Director
- Shares
- 180
- % company
- <0.01%
- Price
- $147.80
- Value
- $26,604
Filed May 14, 2026
| # | Insider | % company | Action | Shares | Price | Value | Filing date |
|---|---|---|---|---|---|---|---|
| 1 | RICHO, ANNA Director | <0.01% | Award / grant | 2.07K | $144.83 | $300,088 | May 21, 2026 |
| 2 | KING, DAVID P Director | <0.01% | Award / grant | 2.07K | $144.83 | $300,088 | May 21, 2026 |
| 3 | SIEGEL, SUSAN E Director | <0.01% | Award / grant | 2.07K | $144.83 | $300,088 | May 21, 2026 |
| 4 | ULLEM, SCOTT B. Director | <0.01% | Award / grant | 2.07K | $144.83 | $300,088 | May 21, 2026 |
| 5 | DORSA, CAROLINE Director | <0.01% | Award / grant | 2.07K | $144.83 | $300,088 | May 21, 2026 |
| 6 | GOTTLIEB, SCOTT Director | <0.01% | Award / grant | 2.07K | $144.83 | $300,088 | May 21, 2026 |
| 7 | MEISTER, KEITH A. Director | <0.01% | Award / grant | 2.07K | $144.83 | $300,088 | May 21, 2026 |
| 8 | SCHILLER, PHILIP W Director | <0.01% | Award / grant | 2.07K | $144.83 | $300,088 | May 21, 2026 |
| 9 | DORSA, CAROLINE Director | <0.01% | Sale to issuer | 1.51K | $141.92 | $214,583 | May 20, 2026 |
| 10 | MEISTER, KEITH A. Director | 0.03% | Sale to issuer | 52.78K | $144.80 | $7,641,965 | May 14, 2026 |
| 11 | MEISTER, KEITH A. Director | <0.01% | Sale to issuer | 12.31K | $144.13 | $1,774,096 | May 14, 2026 |
| 12 | MEISTER, KEITH A. Director | <0.01% | Sale to issuer | 180 | $147.80 | $26,604 | May 14, 2026 |
Showing 12 of 120 matching Form 4 rows. Percent of company uses current shares outstanding when available.Load more insiders
Frequently asked
Common questions.
Who are the largest ILMN shareholders?
BLACKROCK is the largest institutional holder in the loaded ILMN ownership feed, with 19.02 million shares, or about 12.62% of shares outstanding. The table ranks additional institutions by reported share count.
What is institutional ownership of ILMN?
The current TECHi snapshot has 120 loaded institutional rows for Illumina Inc. 70 rows are marked increased or initiated, while 49 rows are marked decreased, with the latest holder filing dated Mar 31, 2026.
Where can I see Illumina Inc insider transactions?
The insider transaction table currently shows 120 loaded Form 4 rows for ILMN, with the latest insider filing dated May 21, 2026. It separates purchases, sales, option exercises, awards, gifts, and tax withholding so administrative transactions are not confused with open-market trades.
Are ILMN insiders buying or selling?
The loaded ILMN Form 4 rows currently read Net selling: 58 sale rows and 0 purchase rows. Awards, gifts, conversions, and tax withholding are shown separately because they do not carry the same signal as open-market buying or selling.
Who is the most active ILMN insider in the loaded filings?
MEISTER, KEITH A. is the most active insider by absolute share movement in the loaded ILMN rows, with 1.37 million shares moving across the visible filing history. Review the action labels before treating that activity as buying or selling.