Who owns Illumina (ILMN)
Which tracked institutional funds hold ILMN, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See ILMN company fundamentals →
Ownership as of the 2026-Q2 13F filings (latest filed 2026-09-22). 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
How the tape is positioned
The tracked-fund tape on ILMN is one-sided between 2026-Q1 and 2026-Q2: 418 added or opened and 108 trimmed or exited — on balance accumulating.
A prompt to read the filings, not a verdict. 13F is a quarter-end snapshot disclosed up to 45 days late; a fund adds or exits for mandate, benchmark, and timing reasons that have nothing to do with a view on the stock. This is a starting question, not a signal to trade.
Conviction spread
ILMN’s largest tracked holder by dollar value, BlackRock, Inc., sizes it at 0.1% of its own reported 13F book, while the median holder sizes it at 0.1% of theirs — a 0.0pp gap the other way — the median holder sizes ILMN more heavily than its largest holder by dollar value does.
Book-share is each fund’s reported value in ILMN divided by its whole reported 13F book, so it is comparable across funds of different sizes and is unaffected by stock splits. A higher share means a fund has committed more of its book to the name — a starting question about conviction, not a verdict or a signal to trade.
Institutional & insider positioning
Between 2026-Q1 and 2026-Q2, across 881 tracked filers holding ILMN, 443 increased or opened the position and 438 reduced or closed it; over the same quarter, open-market insider Form 4s were net sales.
This fuses two public signals for the same quarter — how tracked institutions changed their positions and whether insiders bought or sold in the open market. It describes what was filed; it is a starting question, not a verdict or a signal to trade.
New buyers & exits
Funds opening or closing a position in ILMN between the 2026-Q1 and 2026-Q2 13F filings, and the largest changes among funds holding it in both. New buyers and exits are counted on fund presence (split-invariant); adds and trims are measured on reported value.
New buyers 59
- Jupiter Topco LLC$359M
- AGF MANAGEMENT LTD$240M
- Howard Capital Management, LLC$31M
- PFA Pension, Forsikringsaktieselskab$30M
- Artisan Partners Limited Partnership$29M
- Zurich Insurance Group Ltd/FI$18M
Full exits 63
- JANUS HENDERSON GROUP PLC$259M
- PGGM Investments$122M
- Thrivent Financial for Lutherans$84M
- NATIXIS ADVISORS, LLC$69M
- Pacer Advisors, Inc.$59M
- Amundi$43M
Largest adds
- BlackRock, Inc.$1.4B
- Capital World Investors$796M
- FMR LLC$609M
- WCM INVESTMENT MANAGEMENT, LLC$408M
- PRIMECAP MANAGEMENT CO/CA/$363M
- STATE STREET CORP$352M
Largest trims
- Sessa Capital IM, L.P.$207M
- Southpoint Capital Advisors LP$189M
- MARSHALL WACE, LLP$44M
- ALLIANCEBERNSTEIN L.P.$35M
- Woodline Partners LP$24M
- Ilex Capital Partners (UK) LLP$24M
Institutional holders
One row per tracked fund, most shares held first (every row is from one quarter; reported value breaks ties). “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding.
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| BlackRock, Inc. added | 19,191,398 | $3.4B | 13.8% | 2026-Q2 |
| Capital World Investors trimmed | 15,425,298 | $2.7B | 11.1% | 2026-Q2 |
| VANGUARD PORTFOLIO MANAGEMENT LLC trimmed | 6,627,157 | $1.2B | 4.8% | 2026-Q2 |
| VANGUARD CAPITAL MANAGEMENT LLC trimmed | 6,587,534 | $1.2B | 4.7% | 2026-Q2 |
| STATE STREET CORP added | 6,507,288 | $1.1B | 4.7% | 2026-Q2 |
| WCM INVESTMENT MANAGEMENT, LLC added | 6,206,701 | $1.1B | 4.6% | 2026-Q2 |
| FMR LLC added | 4,523,417 | $795M | 3.3% | 2026-Q2 |
| AQR CAPITAL MANAGEMENT LLC trimmed | 3,544,465 | $623M | 2.5% | 2026-Q2 |
| PRIMECAP MANAGEMENT CO/CA/ added | 3,514,649 | $618M | 2.5% | 2026-Q2 |
| GEODE CAPITAL MANAGEMENT, LLC trimmed | 2,946,669 | $517M | 2.1% | 2026-Q2 |
| Corvex Management LP trimmed | 2,830,552 | $498M | 2.0% | 2026-Q2 |
| Jupiter Topco LLC new | 2,039,763 | $359M | 1.5% | 2026-Q2 |
| Invesco Ltd. trimmed | 1,994,241 | $351M | 1.4% | 2026-Q2 |
| LOOMIS SAYLES & CO L P trimmed | 1,931,948 | $340M | 1.4% | 2026-Q2 |
| WELLINGTON MANAGEMENT GROUP LLP added | 1,812,928 | $319M | 1.3% | 2026-Q2 |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ added | 1,744,209 | $308M | 1.3% | 2026-Q2 |
| Bank of New York Mellon Corp added | 1,671,192 | $294M | 1.2% | 2026-Q2 |
| MORGAN STANLEY trimmed | 1,654,664 | $291M | 1.2% | 2026-Q2 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC trimmed | 1,502,137 | $264M | 1.1% | 2026-Q2 |
| BANK OF AMERICA CORP /DE/ trimmed | 1,455,287 | $256M | 1.0% | 2026-Q2 |
| NORTHERN TRUST CORP trimmed | 1,429,299 | $251M | 1.0% | 2026-Q2 |
| AGF MANAGEMENT LTD new | 1,364,815 | $240M | 1.0% | 2026-Q2 |
| BAILLIE GIFFORD & CO trimmed | 1,335,846 | $235M | 1.0% | 2026-Q2 |
| JPMORGAN CHASE & CO added | 1,181,215 | $214M | 0.9% | 2026-Q2 |
| Legal & General Group Plc added | 1,173,286 | $206M | 0.8% | 2026-Q2 |
| AMERIPRISE FINANCIAL INC trimmed | 1,148,102 | $202M | 0.8% | 2026-Q2 |
| Sessa Capital IM, L.P. trimmed | 1,118,374 | $197M | 0.8% | 2026-Q2 |
| ARK Investment Management LLC trimmed | 1,045,010 | $184M | 0.8% | 2026-Q2 |
| NORDEA INVESTMENT MANAGEMENT AB added | 1,013,065 | $178M | 0.7% | 2026-Q2 |
| Senvest Management, LLC trimmed | 1,008,718 | $177M | 0.7% | 2026-Q2 |
| GOLDMAN SACHS GROUP INC added | 992,574 | $175M | 0.7% | 2026-Q2 |
| VANGUARD FIDUCIARY TRUST CO added | 951,296 | $167M | 0.7% | 2026-Q2 |
| Sumitomo Mitsui Trust Group, Inc. trimmed | 950,071 | $167M | 0.7% | 2026-Q2 |
| FIRST TRUST ADVISORS LP added | 907,489 | $160M | 0.7% | 2026-Q2 |
| ALLIANCEBERNSTEIN L.P. trimmed | 881,041 | $109M | 0.4% | 2026-Q2 |
| PointState Capital LP added | 862,210 | $152M | 0.6% | 2026-Q2 |
| JUPITER ASSET MANAGEMENT LTD trimmed | 840,681 | $148M | 0.6% | 2026-Q2 |
| UBS Group AG trimmed | 840,533 | $148M | 0.6% | 2026-Q2 |
| LETKO, BROSSEAU & ASSOCIATES INC trimmed | 830,293 | $146M | 0.6% | 2026-Q2 |
| NORGES BANK added | 827,073 | $145M | 0.6% | 2026-Q2 |
| RENAISSANCE TECHNOLOGIES LLC trimmed | 826,642 | $145M | 0.6% | 2026-Q2 |
| GUARDCAP ASSET MANAGEMENT Ltd trimmed | 740,132 | $129M | 0.5% | 2026-Q2 |
| EDMOND DE ROTHSCHILD HOLDING S.A. trimmed | 738,165 | $130M | 0.5% | 2026-Q2 |
| Chevy Chase Trust Holdings, LLC added | 727,705 | $128M | 0.5% | 2026-Q2 |
| Quantinno Capital Management LP added | 670,767 | $118M | 0.5% | 2026-Q2 |
| VAUGHAN NELSON INVESTMENT MANAGEMENT, L.P. trimmed | 637,701 | $112M | 0.5% | 2026-Q2 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC trimmed | 635,168 | $112M | 0.5% | 2026-Q2 |
| Amova Asset Management Americas, Inc. trimmed | 617,972 | $109M | 0.4% | 2026-Q2 |
| DIMENSIONAL FUND ADVISORS LP added | 608,463 | $107M | 0.4% | 2026-Q2 |
| Alyeska Investment Group, L.P. added | 581,730 | $102M | 0.4% | 2026-Q2 |
| FEDERATED HERMES, INC. trimmed | 575,799 | $101M | 0.4% | 2026-Q2 |
| BROWN ADVISORY INC trimmed | 568,256 | $100M | 0.4% | 2026-Q2 |
| RHUMBLINE ADVISERS trimmed | 560,716 | $99M | 0.4% | 2026-Q2 |
| FRANKLIN RESOURCES INC added | 551,123 | $97M | 0.4% | 2026-Q2 |
| Stephens Investment Management Group LLC added | 537,926 | $95M | 0.4% | 2026-Q2 |
| Casdin Capital, LLC | 530,000 | $93M | 0.4% | 2026-Q2 |
| Caisse de depot et placement du Quebec added | 492,139 | $87M | 0.4% | 2026-Q2 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP added | 468,602 | $82M | 0.3% | 2026-Q2 |
| CITIGROUP INC added | 465,311 | $82M | 0.3% | 2026-Q2 |
| Spyglass Capital Management LLC added | 458,767 | $81M | 0.3% | 2026-Q2 |
| STIFEL FINANCIAL CORP trimmed | 446,598 | $79M | 0.3% | 2026-Q2 |
| Swiss National Bank trimmed | 420,400 | $74M | 0.3% | 2026-Q2 |
| ENVESTNET ASSET MANAGEMENT INC added | 414,094 | $73M | 0.3% | 2026-Q2 |
| M&G PLC trimmed | 404,208 | $71M | 0.3% | 2026-Q2 |
| Southpoint Capital Advisors LP trimmed | 400,000 | $70M | 0.3% | 2026-Q2 |
| ROYAL BANK OF CANADA trimmed | 399,667 | $70M | 0.3% | 2026-Q2 |
| DEUTSCHE BANK AG\ added | 392,417 | $69M | 0.3% | 2026-Q2 |
| PRINCIPAL FINANCIAL GROUP INC added | 377,323 | $66M | 0.3% | 2026-Q2 |
| JANE STREET GROUP, LLC added | 372,628 | $66M | 0.3% | 2026-Q2 |
| KEYBANK NATIONAL ASSOCIATION/OH trimmed | 371,127 | $65M | 0.3% | 2026-Q2 |
| National Pension Service added | 369,856 | $65M | 0.3% | 2026-Q2 |
| LMR Partners LLP added | 364,307 | $64M | 0.3% | 2026-Q2 |
| Gotham Asset Management, LLC added | 356,183 | $63M | 0.3% | 2026-Q2 |
| Patient Capital Management, LLC trimmed | 345,314 | $61M | 0.2% | 2026-Q2 |
| California Public Employees Retirement System added | 338,864 | $60M | 0.2% | 2026-Q2 |
| PANAGORA ASSET MANAGEMENT INC added | 334,193 | $59M | 0.2% | 2026-Q2 |
| Nuveen, LLC added | 333,234 | $59M | 0.2% | 2026-Q2 |
| Douglas Lane & Associates, LLC trimmed | 324,679 | $57M | 0.2% | 2026-Q2 |
| Robeco Institutional Asset Management B.V. added | 307,785 | $54M | 0.2% | 2026-Q2 |
| ION Fund Management Ltd trimmed | 306,384 | $54M | 0.2% | 2026-Q2 |
| RAYMOND JAMES FINANCIAL INC trimmed | 305,553 | $54M | 0.2% | 2026-Q2 |
| Diamond Hill Capital Management, LLC (Investment Advisor) trimmed | 301,642 | $53M | 0.2% | 2026-Q2 |
| CIBC Bancorp USA Inc. trimmed | 298,654 | $53M | 0.2% | 2026-Q2 |
| VIRGINIA RETIREMENT SYSTEMS ET Al trimmed | 295,711 | $52M | 0.2% | 2026-Q2 |
| JENNISON ASSOCIATES LLC added | 295,268 | $52M | 0.2% | 2026-Q2 |
| VANGUARD ASSET MANAGEMENT, Ltd added | 295,056 | $52M | 0.2% | 2026-Q2 |
| OVERSEA-CHINESE BANKING Corp Ltd added | 291,819 | $51M | 0.2% | 2026-Q2 |
| Ilex Capital Partners (UK) LLP trimmed | 289,131 | $51M | 0.2% | 2026-Q2 |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. added | 282,402 | $50M | 0.2% | 2026-Q2 |
| TEACHER RETIREMENT SYSTEM OF TEXAS added | 273,919 | $48M | 0.2% | 2026-Q2 |
| Pictet Asset Management Holding SA added | 268,581 | $48M | 0.2% | 2026-Q2 |
| IEQ CAPITAL, LLC trimmed | 267,932 | $47M | 0.2% | 2026-Q2 |
| ASR Vermogensbeheer N.V. trimmed | 246,356 | $43M | 0.2% | 2026-Q2 |
| AustralianSuper Pty Ltd added | 236,751 | $42M | 0.2% | 2026-Q2 |
| EXCHANGE TRADED CONCEPTS, LLC trimmed | 230,127 | $40M | 0.2% | 2026-Q2 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM trimmed | 228,312 | $40M | 0.2% | 2026-Q2 |
| BAMCO INC /NY/ added | 227,094 | $40M | 0.2% | 2026-Q2 |
| BARCLAYS PLC added | 217,323 | $38M | 0.2% | 2026-Q2 |
| Russell Investments Group, Ltd. added | 215,127 | $38M | 0.2% | 2026-Q2 |
| Cannell & Spears LLC trimmed | 210,021 | $37M | 0.2% | 2026-Q2 |
Ownership over time
Tracked institutional holder count and total shares held by filing quarter (independent scales). The curated-era tail and any mid-ingest latest quarter are handled honestly — a partial quarter is not drawn as a collapse.
Reading this table
Funds hold the same stock for different reasons — an index fund “holds” almost everything, an active manager sizes a name to a mandate and a benchmark, and each fund entered at its own price and time. Because 13F is filed up to 45 days after quarter-end, every row is a backward-looking snapshot; a manager may have traded since. Share-class siblings (a company’s A and C shares) are rolled up to one line so a dual-class name is never double-counted. Compare like-for-like. A large holder is not an endorsement, and a fund exiting is not a warning — this is a starting question, not a verdict.
About 13F filings
A Form 13F is a quarterly disclosure that institutional investment managers with over $100 million in US-listed equities must file with the SEC. In plain English: it is a snapshot of the long stock positions a fund held at the end of a quarter. It covers long US-listed equities only — not short positions, options, cash, or private holdings — and the funds shown are the large sample we track, not the complete 13F universe.