Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
820 institutional managers reported holding ILMN for the quarter ended Mar 31, 2026. Reported positions total over 95% of shares outstanding; the top 10 hold 51%. 86 opened new positions; 107 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| BlackRock | 19.02M | 12.35% | $2.34B | added +3.8% | ≤2013 |
| Capital Group (American Funds) | 15.55M | 10.10% | $1.92B | trimmed -22.6% | 2023 Q4 |
| Vanguard Group | 14.81M | 9.62% | $1.83B | added +3% | ≤2013 |
| State Street | 6.43M | 4.17% | $792.3M | added +3.9% | ≤2013 |
| WCM Investment Management | 5.92M | 3.85% | $729.9M | added +45.5% | 2018 Q3 |
| AQR Capital | 3.98M | 2.58% | $490.6M | trimmed -10.1% | 2024 Q1 |
| Corvex Management LP (focused) | 3.83M | 2.49% | $471.9M | unchanged | 2023 Q4 |
| Sessa Capital IM, L.p. (focused) | 3.28M | 2.13% | $403.7M | trimmed -3.8% | 2025 Q2 |
| Geode Capital | 3.05M | 1.98% | $376.0M | added +6.4% | ≤2013 |
| Loomis Sayles & CO L P | 2.94M | 1.91% | $362.7M | trimmed -29.5% | 2020 Q1 |
| UBS | 2.73M | 1.77% | $335.9M | trimmed -12.4% | ≤2013 |
| Invesco | 2.66M | 1.73% | $327.5M | trimmed -3.3% | ≤2013 |
| Janus Henderson | 2.10M | 1.36% | $258.9M | added +1.4% | ≤2013 |
| Southpoint Capital Advisors LP (focused) | 2.10M | 1.36% | $258.8M | added +20% | 2025 Q1 |
| PRIMECAP Management | 2.07M | 1.34% | $254.8M | added +3.9% | ≤2013 |
| Morgan Stanley | 1.84M | 1.20% | $227.2M | trimmed -27.1% | ≤2013 |
| Northern Trust | 1.58M | 1.02% | $194.5M | added +2.3% | ≤2013 |
| FMR (Fidelity) | 1.55M | 1.00% | $190.6M | trimmed -8.7% | ≤2013 |
| Senvest Management, LLC (focused) | 1.54M | 1.00% | $190.3M | added +10.2% | 2023 Q1 |
| Baillie Gifford | 1.54M | 1.00% | $189.2M | trimmed -5.6% | ≤2013 |
| Bank OF America CORP /DE/ | 1.52M | 0.98% | $186.9M | trimmed -17.7% | ≤2013 |
| BNY Mellon | 1.50M | 0.97% | $184.8M | trimmed -7.6% | ≤2013 |
| Ameriprise Financial INC | 1.16M | 0.75% | $142.5M | trimmed -4.4% | ≤2013 |
| Legal & General Group PLC | 1.15M | 0.75% | $141.7M | added +1.9% | ≤2013 |
| ARK Investment Management | 1.13M | 0.73% | $139.2M | trimmed -26.7% | 2024 Q4 |
| AllianceBernstein | 1.09M | 0.71% | $134.5M | added +360.9% | ≤2013 |
| Jupiter Asset Management LTD | 1.09M | 0.71% | $134.0M | added +300.9% | 2025 Q3 |
| Sumitomo Mitsui Trust Group, INC. | 1.04M | 0.67% | $127.7M | trimmed -17.4% | ≤2013 |
| MFS Investment Management | 1.02M | 0.67% | $126.2M | added +82.6% | 2025 Q4 |
| Pggm Investments | 990.5k | 0.64% | $122.1M | trimmed -13.8% | 2022 Q3 |
| Nordea Investment Management AB | 987.1k | 0.64% | $121.6M | added +4.5% | ≤2013 |
| Renaissance Technologies | 972.6k | 0.63% | $119.9M | trimmed -14.3% | 2023 Q4 |
| Guardcap Asset Management LTD (focused) | 887.5k | 0.58% | $109.4M | trimmed -43.7% | 2018 Q2 |
| Vaughan Nelson Investment Management, L.p. | 863.7k | 0.56% | $106.4M | opened | 2026 Q1 |
| Letko, Brosseau & Associates INC | 852.9k | 0.55% | $105.1M | trimmed -0.7% | 2024 Q3 |
| Federated Hermes, INC. | 816.9k | 0.53% | $100.7M | trimmed -2.3% | ≤2013 |
| Edmond DE Rothschild Holding S.a. | 767.4k | 0.50% | $94.6M | trimmed -24.8% | 2015 Q2 |
| Goldman Sachs | 755.1k | 0.49% | $93.0M | added +84.3% | ≤2013 |
| First Trust Advisors LP | 734.6k | 0.48% | $90.5M | trimmed -15.6% | ≤2013 |
| Amova Asset Management Americas, INC. | 721.5k | 0.47% | $88.9M | trimmed -18.6% | 2024 Q4 |
| Thrivent Financial for Lutherans | 682.1k | 0.44% | $84.1M | added +13.6% | ≤2013 |
| Charles Schwab Investment Management | 645.7k | 0.42% | $79.6M | added +4.9% | ≤2013 |
| Wellington Management | 624.9k | 0.41% | $77.0M | added +377.5% | ≤2013 |
| Quantinno Capital Management LP | 617.5k | 0.40% | $76.1M | added +18.5% | 2023 Q4 |
| Rhumbline Advisers | 609.8k | 0.40% | $75.1M | added +1.2% | ≤2013 |
| Ilex Capital Partners (UK) LLP | 605.3k | 0.39% | $74.6M | added +103.9% | 2025 Q1 |
| Brown Advisory INC | 592.4k | 0.39% | $73.0M | added +0.5% | ≤2013 |
| Dimensional Fund Advisors | 582.8k | 0.38% | $71.8M | added +3.3% | ≤2013 |
| Natixis Advisors, LLC | 563.3k | 0.37% | $69.4M | added +87.1% | ≤2013 |
| Patient Capital Management, LLC (focused) | 544.8k | 0.35% | $67.1M | trimmed -5.4% | 2023 Q4 |
Largest 50 of 820 shown; the full ranked, searchable register is at boothcheck.com/holders/ILMN. Related filers are grouped using the filings' own included-manager declarations. Historically, several managers opening new positions in the same quarter said almost nothing about the quarter that followed (59,118 cases since 2013). A filed record, not a forecast. Nothing here is investment advice.