Illumina
ILMN
939 hedge funds and large institutions have $27.5B invested in Illumina in 2026 Q2 according to their latest regulatory filings, with 162 funds opening new positions, 301 increasing their positions, 334 reducing their positions, and 65 closing their positions.
174% more call options, than puts
Call options by funds: $144M | Put options by funds: $52.4M
149% more first-time investments, than exits
New positions opened: 162 | Existing positions closed: 65
42% more capital invested
Capital invested by funds: $19.3B → $27.5B (+$8.15B)
30% more funds holding in top 10
Funds holding in top 10: 10 → 13 (+3)
10% more funds holding
Funds holding: 850 → 939 (+89)
0.77% more ownership
Funds ownership: 102.49% → 103.26% (+0.77%)
10% less repeat investments, than reductions
Existing positions increased: 301 | Existing positions reduced: 334
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Fidelity Investments
Boston,
Massachusetts
|
+$436M |
| 2 |
Primecap Management
Pasadena,
California
|
+$212M |
| 3 |
AM
AGF Management
Toronto,
Ontario, Canada
|
+$200M |
| 4 |
Wellington Management Group
Boston,
Massachusetts
|
+$174M |
| 5 |
Massachusetts Financial Services
Boston,
Massachusetts
|
+$105M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
SC
Sessa Capital
New York
|
-$316M |
| 2 |
SCA
Southpoint Capital Advisors
New York
|
-$249M |
| 3 |
Loomis, Sayles & Company
Boston,
Massachusetts
|
-$148M |
| 4 |
CM
Corvex Management
New York
|
-$146M |
| 5 |
Invesco
Atlanta,
Georgia
|
-$97.1M |
ILMN Hedge Fund Activity: Q2 2026 in Review
939 of the 8,348 institutional investors tracked by Wall St. Rank reported a position in Illumina (ILMN) for Q2 2026, worth a combined $27.5B — up 42% from $19.3B a quarter earlier.
Buyers outnumbered sellers: 162 funds opened new ILMN positions and 65 closed out — a net gain of 97 holders — while 301 added to existing stakes and 334 trimmed.
The largest buyer was Fidelity Investments, adding an estimated $436M. The largest seller was Sessa Capital, cutting an estimated $316M.
- 939 institutional investors held Illumina (ILMN) as of Q2 2026, up from 850 in Q1 2026.
- Funds reported $27.5B of Illumina stock for Q2 2026, up 42% quarter-over-quarter.
- 162 funds opened new Illumina positions in Q2 2026 and 65 closed out, a net change of +97 holders.
- The largest Illumina buyer in Q2 2026 was Fidelity Investments, an estimated $436M added.
- The largest Illumina seller in Q2 2026 was Sessa Capital, an estimated $316M sold.
Based on aggregated 13F filings for Q2 2026.