Illumina, Inc. (ILMN) Ownership
ILMN ownership summary
as of October 18, 2026- Institutions
- 107.3% of shares outstanding
- Insiders
- 0.21% of shares outstanding
- Shares outstanding
- 151.0M
- Float
- 150.5M shares available to trade
- Short interest
- 10.26% 9.5M shares short
- Days to cover
- 2.43 short interest down 10.5% vs prior month
- Institutions 107.34%
- Insiders 0.21%
ILMN top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | BlackRock Inc | 12.71% | 19.2M | $5.04B | +167,808 (+0.9%) | June 30, 2026 |
| 2 | Capital World Investors | 10.22% | 15.4M | $4.05B | −124,662 (−0.8%) | June 30, 2026 |
| 3 | Vanguard Portfolio Management, LLC | 4.39% | 6.6M | $1.74B | −196,497 (−2.9%) | June 30, 2026 |
| 4 | Vanguard Capital Management, LLC | 4.36% | 6.6M | $1.73B | −7,302 (−0.1%) | June 30, 2026 |
| 5 | State Street Corp | 4.31% | 6.5M | $1.71B | +77,944 (+1.2%) | June 30, 2026 |
| 6 | WCM Investment Management | 4.11% | 6.2M | $1.63B | +283,528 (+4.8%) | June 30, 2026 |
| 7 | FMR Inc | 3.00% | 4.5M | $1.19B | +3.0M (+192.4%) | June 30, 2026 |
| 8 | AQR Capital Management LLC | 2.35% | 3.5M | $930.6M | −436,615 (−11.0%) | June 30, 2026 |
| 9 | PRIMECAP Management Company | 2.33% | 3.5M | $922.7M | +1.4M (+70.0%) | June 30, 2026 |
| 10 | Geode Capital Management, LLC | 1.95% | 2.9M | $773.6M | −104,610 (−3.4%) | June 30, 2026 |
| 11 | Corvex Management LP | 1.87% | 2.8M | $743.1M | −999,056 (−26.1%) | June 30, 2026 |
| 12 | HHG PLC | 1.39% | 2.1M | $551.5M | +29,094 (+1.4%) | March 31, 2026 |
| 13 | Jupiter Topco LLC | 1.35% | 2.0M | $535.5M | +2.0M (0.0%) | June 30, 2026 |
| 14 | Amvescap Plc. | 1.32% | 2.0M | $523.6M | −663,361 (−25.0%) | June 30, 2026 |
| 15 | Loomis, Sayles & Company LP | 1.28% | 1.9M | $507.2M | −1.0M (−34.4%) | June 30, 2026 |
| 16 | Wellington Management Company LLP | 1.20% | 1.8M | $476.0M | +1.2M (+190.1%) | June 30, 2026 |
| 17 | Massachusetts Financial Services Company | 1.16% | 1.7M | $457.9M | +720,487 (+70.4%) | June 30, 2026 |
| 18 | Bank of New York Mellon Corp | 1.11% | 1.7M | $438.8M | +171,176 (+11.4%) | June 30, 2026 |
| 19 | Morgan Stanley - Brokerage Accounts | 1.10% | 1.7M | $434.4M | −188,948 (−10.2%) | June 30, 2026 |
| 20 | UBS Asset Mgmt Americas Inc | 0.99% | 1.5M | $394.4M | −61,102 (−3.9%) | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 10 holders added 9.1M shares and 10 cut 3.8M.
ILMN top mutual fund and ETF holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Vanguard MStar Total Stk Mkt Idx Invest | 3.02% | 4.6M | $1.20B | −10,173 (−0.2%) | August 31, 2026 |
| 2 | Vanguard 500 Index Investor | 2.63% | 4.0M | $1.04B | +4.0M (0.0%) | September 30, 2026 |
| 3 | Vanguard Small Cap Index | 2.25% | 3.4M | $892.2M | +90,854 (+2.7%) | September 30, 2026 |
| 4 | American Funds Growth Fd of Amer A | 1.45% | 2.2M | $573.2M | −561,200 (−20.4%) | September 30, 2026 |
| 5 | iShares Core S&P 500 ETF | 1.33% | 2.0M | $528.3M | −3,256 (−0.2%) | September 30, 2026 |
| 6 | American Funds American Balanced A | 1.29% | 1.9M | $511.1M | −1.5M (−44.2%) | September 30, 2026 |
| 7 | Vanguard MStar Small Cap Growth Indx Inv | 1.25% | 1.9M | $496.6M | +942,551 (+99.3%) | September 30, 2026 |
| 8 | State Street® SPDR® S&P 500® ETF | 1.23% | 1.9M | $486.4M | — | September 30, 2026 |
| 9 | American Funds New Economy A | 1.19% | 1.8M | $473.4M | −880,597 (−32.8%) | September 30, 2026 |
| 10 | Vanguard Capital Opportunity Inv | 1.17% | 1.8M | $462.5M | +516,400 (+41.5%) | June 30, 2026 |
| 11 | Fidelity OTC | 0.94% | 1.4M | $370.7M | +1.1M (+323.9%) | August 31, 2026 |
| 12 | American Funds New Perspective A | 0.79% | 1.2M | $315.0M | −196,815 (−14.1%) | September 30, 2026 |
| 13 | iShares Biotechnology ETF | 0.78% | 1.2M | $308.5M | −8,904 (−0.8%) | September 30, 2026 |
| 14 | JPMorgan Large Cap Growth I | 0.74% | 1.1M | $293.0M | +509,636 (+84.0%) | August 31, 2026 |
| 15 | State Street®HlthCrSelSectSPDR®ETF | 0.71% | 1.1M | $281.1M | +3,328 (+0.3%) | September 30, 2026 |
| 16 | MFS Mid Cap Growth A | 0.68% | 1.0M | $268.5M | — | August 31, 2026 |
| 17 | Janus Henderson Enterprise D | 0.66% | 998K | $262.0M | −68,736 (−6.4%) | August 31, 2026 |
| 18 | Invesco S&P 500® Equal Weight ETF | 0.63% | 955K | $250.7M | −1,995 (−0.2%) | September 30, 2026 |
| 19 | Fidelity Contrafund | 0.63% | 954K | $250.4M | +167,485 (+21.3%) | August 31, 2026 |
| 20 | American Funds Fundamental Invs A | 0.62% | 932K | $244.8M | −67,700 (−6.8%) | September 30, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
ILMN insider transactions
latest 11| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2026-02-18 | Patricia Leckman | Sell | $116.18 | 2,370 | $275,347 |
| 2026-02-10 | Gilbert Ray Cisneros, Jr. | Buy | $119.32 | — | — |
| 2026-02-09 | Scott Gottlieb | Buy | $117.81 | 200 | $23,562 |
| 2026-01-29 | Ro Khanna | Sell | $149.69 | — | — |
| 2025-12-12 | Scott M Davies | Sell | $136.09 | 323 | $43,957 |
| 2025-11-03 | Scott Gottlieb | Buy | $122.13 | 500 | $61,065 |
| 2025-10-31 | Lisa C. McClain | Sell | $123.64 | — | — |
| 2025-10-30 | Lisa C. McClain | Sell | $99.01 | — | — |
| 2025-10-30 | Lisa C. McClain | Buy | $99.01 | — | — |
| 2025-06-09 | Lisa C. McClain | Buy | $84.98 | — | — |
| 2025-05-12 | Ankur Dhingra | Buy | $81.21 | 6,100 | $495,381 |
Reported trades by company officers, directors and other filers (including disclosures by members of Congress where EODHD lists them). "—" where the filing gives no share count.
ILMN shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns ILMN
Institutional investors own 107.3% of Illumina's shares and insiders 0.21%. The largest holder is BlackRock Inc with 12.71% of the shares (19.2M), as of June 30, 2026. Among the top 20 institutions, 10 added shares and 10 reduced their stake in the latest filings. Short interest is 10.26% of the float, or 2.43 days of average trading volume. The share count rose 3.6% since 2014.
Related: ILMN analyst forecast, ILMN key metrics. See the ILMN stock overview for the latest quote and news.
ILMN ownership FAQ
Who owns the most Illumina stock?
The largest shareholders of Illumina are BlackRock Inc (12.71%), Capital World Investors (10.22%), Vanguard Portfolio Management, LLC (4.39%), Vanguard Capital Management, LLC (4.36%), State Street Corp (4.31%).
What percentage of Illumina is owned by institutions?
Institutions hold 107.3% of Illumina's shares outstanding; insiders hold 0.21%.
Which funds own Illumina?
The largest fund holders of Illumina are Vanguard MStar Total Stk Mkt Idx Invest (3.02%), Vanguard 500 Index Investor (2.63%), Vanguard Small Cap Index (2.25%), American Funds Growth Fd of Amer A (1.45%), iShares Core S&P 500 ETF (1.33%).
What is Illumina's short interest?
9.5M shares of Illumina were sold short, 10.26% of the float; at the average daily volume it would take 2.43 days to cover.
Are insiders buying or selling Illumina?
Of the latest 11 reported insider transactions in Illumina (since May 12, 2025), 6 were purchases and 5 were sales.
How many shares of Illumina are outstanding?
Illumina has 151.0M shares outstanding, of which 150.5M are in the public float.