BLACKROCK
Rank #1
12.6%
- Shares
- 19.02M
- Change
- +701.91K
- Change %
- +3.83%
- Filing
- Mar 31, 2026
Increased
Recent
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Top ILMN institutional shareholders, filing changes, and Form 4 insider activity with filters for buys, sales, option exercises, gifts, and tax withholding.
Ownership read
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
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
Top 120 institutional holders
Ranked by reported share count, with position changes and latest filing dates where the ownership feed supplies them.
BLACKROCK
Rank #1
12.6%
Increased
CAPITAL WORLD INVESTORS
Rank #2
10.3%
Decreased
VANGUARD GROUP INC
Rank #3
9.52%
Decreased
VANGUARD PORTFOLIO MANAGEMENT LLC
Rank #4
4.53%
Initiated
VANGUARD CAPITAL MANAGEMENT LLC
Rank #5
4.37%
Initiated
STATE STREET CORP
Rank #6
4.26%
Increased
WCM INVESTMENT MANAGEMENT
Rank #7
3.93%
Increased
AQR CAPITAL MANAGEMENT LLC
Rank #8
2.64%
Decreased
CORVEX MANAGEMENT LP
Rank #9
2.54%
Unchanged
SESSA CAPITAL IM
Rank #10
2.17%
Decreased
GEODE CAPITAL MANAGEMENT
Rank #11
2.02%
Increased
LOOMIS SAYLES & CO L P
Rank #12
1.95%
Decreased
INVESCO LTD.
Rank #13
1.76%
Decreased
JANUS HENDERSON GROUP PLC
Rank #14
1.39%
Increased
SOUTHPOINT CAPITAL ADVISORS LP
Rank #15
1.39%
Increased
PRIMECAP MANAGEMENT CO
Rank #16
1.37%
Increased
MORGAN STANLEY
Rank #17
1.22%
Decreased
NORTHERN TRUST CORP
Rank #18
1.05%
Increased
UBS AM
Rank #19
1.04%
Decreased
FMR LLC
Rank #20
1.03%
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 |
Recent insider transactions
Action codes are translated so open-market buys and sales are separate from awards, gifts, conversions, and tax withholding.
RICHO, ANNA
Director
Filed May 21, 2026
KING, DAVID P
Director
Filed May 21, 2026
SIEGEL, SUSAN E
Director
Filed May 21, 2026
ULLEM, SCOTT B.
Director
Filed May 21, 2026
DORSA, CAROLINE
Director
Filed May 21, 2026
GOTTLIEB, SCOTT
Director
Filed May 21, 2026
MEISTER, KEITH A.
Director
Filed May 21, 2026
SCHILLER, PHILIP W
Director
Filed May 21, 2026
DORSA, CAROLINE
Director
Filed May 20, 2026
MEISTER, KEITH A.
Director
Filed May 14, 2026
MEISTER, KEITH A.
Director
Filed May 14, 2026
MEISTER, KEITH A.
Director
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 |
Frequently asked
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.
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.
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.
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.
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.