Illumina
ILMN
721 hedge funds and large institutions have $12.3B invested in Illumina in 2025 Q1 according to their latest regulatory filings, with 85 funds opening new positions, 266 increasing their positions, 276 reducing their positions, and 210 closing their positions.
20% more call options, than puts
Call options by funds: $139M | Put options by funds: $116M
0.39% more ownership
Funds ownership: 97.45% → 97.84% (+0.39%)
4% less repeat investments, than reductions
Existing positions increased: 266 | Existing positions reduced: 276
16% less funds holding
Funds holding: 854 → 721 (-133)
27% less funds holding in top 10
Funds holding in top 10: 15 → 11 (-4)
40% less capital invested
Capital invested by funds: $20.6B → $12.3B (-$8.34B)
60% less first-time investments, than exits
New positions opened: 85 | Existing positions closed: 210
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
CM
Corvex Management
New York
|
+$230M |
| 2 |
AQR Capital Management
Greenwich,
Connecticut
|
+$180M |
| 3 |
Jacobs Levy Equity Management
Florham Park,
New Jersey
|
+$125M |
| 4 |
Brown Advisory
Baltimore,
Maryland
|
+$108M |
| 5 |
UBS Group
Zurich,
Switzerland
|
+$106M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Norges Bank
Oslo,
Norway
|
-$177M |
| 2 |
AllianceBernstein
Nashville,
Tennessee
|
-$150M |
| 3 |
Bessemer Group
Woodbridge,
New Jersey
|
-$145M |
| 4 |
Artisan Partners
Milwaukee,
Wisconsin
|
-$141M |
| 5 |
Ameriprise
Minneapolis,
Minnesota
|
-$112M |
ILMN Hedge Fund Activity: Q1 2025 in Review
721 of the 7,458 institutional investors tracked by Wall St. Rank reported a position in Illumina (ILMN) for Q1 2025, worth a combined $12.3B — down 40% from $20.6B a quarter earlier.
Sellers outnumbered buyers: 210 funds closed out of ILMN and 85 opened new positions — a net loss of 125 holders — while 276 trimmed existing stakes and 266 added.
The largest buyer was Corvex Management, adding an estimated $230M. The largest seller was Norges Bank, cutting an estimated $177M.
- 721 institutional investors held Illumina (ILMN) as of Q1 2025, down from 854 in Q4 2024.
- Funds reported $12.3B of Illumina stock for Q1 2025, down 40% quarter-over-quarter.
- 85 funds opened new Illumina positions in Q1 2025 and 210 closed out, a net change of -125 holders.
- The largest Illumina buyer in Q1 2025 was Corvex Management, an estimated $230M added.
- The largest Illumina seller in Q1 2025 was Norges Bank, an estimated $177M sold.
Based on aggregated 13F filings for Q1 2025.