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Illumina

775 hedge funds and large institutions have $14.9B invested in Illumina in 2025 Q3 according to their latest regulatory filings, with 112 funds opening new positions, 273 increasing their positions, 270 reducing their positions, and 71 closing their positions.

New
Increased
Maintained
Reduced
Closed

466% more call options, than puts

Call options by funds: $601M | Put options by funds: $106M

58% more first-time investments, than exits

New positions opened: 112 | Existing positions closed: 71

5% more funds holding

Funds holding: 738775 (+37)

4.03% more ownership

Funds ownership: 98.23%102.26% (+4%)

1% more repeat investments, than reductions

Existing positions increased: 273 | Existing positions reduced: 270

0% more capital invested

Capital invested by funds: $14.8B → $14.9B (+$72.3M)

18% less funds holding in top 10

Funds holding in top 10: 119 (-2)

Holders
775
Holders Change
+37
Holders Change %
+5.01%
% of All Funds
10.17%
Holding in Top 10
9
Holding in Top 10 Change
-2
Holding in Top 10 Change %
-18.18%
% of All Funds
0.12%
New
112
Increased
273
Reduced
270
Closed
71
Calls
$601M
Puts
$106M
Net Calls
+$494M
Net Calls Change
-$110M
Name Holding Trade Value Shares
Change
Change in
Stake
Capital World Investors
1
Capital World Investors
California
$1.9B +$330M +3,331,542 +20%
BlackRock
2
BlackRock
New York
$1.77B -$66.6M -671,290 -3%
Vanguard Group
3
Vanguard Group
Pennsylvania
$1.39B -$52.1M -525,153 -3%
State Street
4
State Street
Massachusetts
$570M +$37.9M +382,520 +7%
SC
5
Sessa Capital
New York
$445M -$3.58M -36,095 -0.8%
Loomis, Sayles & Company
6
Loomis, Sayles & Company
Massachusetts
$407M +$6.14M +61,899 +1%
WCM Investment Management
7
WCM Investment Management
California
$384M -$24.3M -244,790 -6%
CM
8
Corvex Management
New York
$364M
AQR Capital Management
9
AQR Capital Management
Connecticut
$316M +$10.1M +102,147 +3%
Geode Capital Management
10
Geode Capital Management
Massachusetts
$259M -$12.9M -130,279 -5%
Janus Henderson Group
11
Janus Henderson Group
United Kingdom
$193M +$10.9M +109,621 +6%
Bank of America
12
Bank of America
North Carolina
$180M -$3.77M -38,040 -2%
Primecap Management
13
Primecap Management
California
$179M -$7.26M -73,220 -4%
GAM
14
GuardCap Asset Management
United Kingdom
$176M -$18.4M -185,639 -9%
PC
15
PointState Capital
New York
$171M -$114M -1,150,354 -39%
Baillie Gifford & Co
16
Baillie Gifford & Co
United Kingdom
$160M -$5.4M -54,461 -3%
Bank of New York Mellon
17
Bank of New York Mellon
New York
$160M -$65M -655,019 -28%
UBS AM
18
UBS AM
Illinois
$151M -$20.5M -206,805 -12%
Northern Trust
19
Northern Trust
Illinois
$150M -$1.71M -17,197 -1%
Fidelity Investments
20
Fidelity Investments
Massachusetts
$149M +$43.9M +442,502 +39%
Morgan Stanley
21
Morgan Stanley
New York
$145M +$17.4M +175,195 +13%
SCA
22
Southpoint Capital Advisors
New York
$142M +$39.7M +400,000 +36%
UBS Group
23
UBS Group
Switzerland
$142M +$8.76M +88,282 +6%
AIM
24
ARK Investment Management
Florida
$139M +$29.7M +299,801 +26%
SM
25
Senvest Management
New York
$134M +$2.86M +28,789 +2%

ILMN Hedge Fund Activity: Q3 2025 in Review

775 of the 7,619 institutional investors tracked by Wall St. Rank reported a position in Illumina (ILMN) for Q3 2025, worth a combined $14.9B — up 0.49% from $14.8B a quarter earlier.

Buyers outnumbered sellers: 112 funds opened new ILMN positions and 71 closed out — a net gain of 41 holders — while 273 added to existing stakes and 270 trimmed.

The largest buyer was Capital World Investors, adding an estimated $330M. The largest seller was PointState Capital, cutting an estimated $114M.

  • 775 institutional investors held Illumina (ILMN) as of Q3 2025, up from 738 in Q2 2025.
  • Funds reported $14.9B of Illumina stock for Q3 2025, up 0.49% quarter-over-quarter.
  • 112 funds opened new Illumina positions in Q3 2025 and 71 closed out, a net change of +41 holders.
  • The largest Illumina buyer in Q3 2025 was Capital World Investors, an estimated $330M added.
  • The largest Illumina seller in Q3 2025 was PointState Capital, an estimated $114M sold.

Based on aggregated 13F filings for Q3 2025.