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X4 Pharmaceuticals

84 hedge funds and large institutions have $388M invested in X4 Pharmaceuticals in 2026 Q1 according to their latest regulatory filings, with 18 funds opening new positions, 22 increasing their positions, 23 reducing their positions, and 11 closing their positions.

New
Increased
Maintained
Reduced
Closed

64% more first-time investments, than exits

New positions opened: 18 | Existing positions closed: 11

50% more funds holding in top 10

Funds holding in top 10: 46 (+2)

8% more capital invested

Capital invested by funds: $358M → $388M (+$30.4M)

6% more funds holding

Funds holding: 7984 (+5)

1.01% more ownership

Funds ownership: 102.28%103.28% (+1%)

4% less repeat investments, than reductions

Existing positions increased: 22 | Existing positions reduced: 23

Holders
84
Holders Change
+5
Holders Change %
+6.33%
% of All Funds
1.03%
Holding in Top 10
6
Holding in Top 10 Change
+2
Holding in Top 10 Change %
+50%
% of All Funds
0.07%
New
18
Increased
22
Reduced
23
Closed
11
Calls
Puts
Net Calls
Net Calls Change
Name Holding Trade Value Shares
Change
Change in
Stake
State Street
26
State Street
Massachusetts
$1.67M +$769K +205,300 +104%
Marshall Wace
27
Marshall Wace
United Kingdom
$1.39M +$960K +256,378 +319%
SCM
28
Stonepine Capital Management
Oregon
$1.38M -$967K -258,264 -44%
VA
29
VR Adviser
New York
$1.37M +$1.24M +330,525 New
UBS Group
30
UBS Group
Switzerland
$1.1M +$986K +263,211 +6,375%
ACA
31
Acorn Capital Advisors
New York
$967K -$147K -39,310 -14%
Qube Research & Technologies (QRT)
32
Qube Research & Technologies (QRT)
United Kingdom
$904K +$566K +151,207 +223%
Northern Trust
33
Northern Trust
Illinois
$736K
PFCS
34
Pale Fire Capital SE
Czech Republic
$692K
Bank of America
35
Bank of America
North Carolina
$622K +$430K +114,915 +321%
AAA
36
Affinity Asset Advisors
New York
$599K
PWM
37
Palumbo Wealth Management
New York
$541K +$66.1K +17,657 +16%
BHCM
38
Brevan Howard Capital Management
Jersey
$526K +$477K +127,321 New
SPS
39
Susquehanna Portfolio Strategies
Pennsylvania
$424K +$222K +59,340 +137%
DTL
40
Dynamic Technology Lab
Singapore
$385K +$136K +36,221 New
Charles Schwab
41
Charles Schwab
California
$276K -$146 -39 -0.1%
OAC
42
OMERS Administration Corp
Ontario, Canada
$237K -$194K -51,900 -48%
Hudson Bay Capital Management
43
Hudson Bay Capital Management
Connecticut
$208K +$67.6K +18,048 +56%
CFM
44
Catalyst Funds Management
Australia
$196K +$177K +47,383 New
Jane Street
45
Jane Street
New York
$153K -$203K -54,270 -59%
Citigroup
46
Citigroup
New York
$148K +$12.9K +3,433 +11%
VGA
47
Vanguard Global Advisers
Pennsylvania
$136K +$124K +32,977 New
DC
48
Diametric Capital
Massachusetts
$120K +$109K +28,973 New
Stifel Financial
49
Stifel Financial
Missouri
$90K +$4.84K +1,293 +6%
Invesco
50
Invesco
Georgia
$82.5K +$74.8K +19,968 New