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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
Morgan Stanley
1
Morgan Stanley
New York
$39.1M +$4.72M +1,258,977 +15%
EAM
2
Empery Asset Management
New York
$36.9M -$26.2K -6,987 -0.1%
Fidelity Investments
3
Fidelity Investments
Massachusetts
$33.5M -$1.48M -395,700 -5%
BCLSI
4
Bain Capital Life Sciences Investors
Massachusetts
$32.9M
PA
5
Perceptive Advisors
New York
$27.8M +$1.59M +423,196 +7%
SVCM
6
Saturn V Capital Management
Texas
$26.7M +$2.46M +656,116 +11%
DTC
7
Deep Track Capital
Connecticut
$26.2M +$4.97M +1,325,874 +26%
KCM
8
Kalehua Capital Management
Texas
$15.4M
VCM
9
Vanguard Capital Management
Pennsylvania
$14.4M +$13.1M +3,497,612 New
B
10
Braidwell
Connecticut
$13.5M -$359K -95,950 -3%
NMC
11
NEA Management Company
Maryland
$13.4M
RA
12
Rosalind Advisors
Ontario, Canada
$13.3M +$2.28M +608,846 +23%
Blackstone Inc
13
Blackstone Inc
New York
$11.1M
TECP
14
Trails Edge Capital Partners
Georgia
$10.6M
NCM
15
Nantahala Capital Management
Connecticut
$10.1M
BI
16
BVF Inc
California
$9.23M
SB
17
Samsara BioCapital
California
$7.57M -$477K -127,434 -7%
BlackRock
18
BlackRock
New York
$5M -$56.2K -15,014 -1%
Millennium Management
19
Millennium Management
New York
$5M +$4.32M +1,154,536 +2,062%
WP
20
Woodline Partners
California
$4.13M +$899 +240 +0%
Geode Capital Management
21
Geode Capital Management
Massachusetts
$3.88M -$2.7K -721 -0.1%
Goldman Sachs
22
Goldman Sachs
New York
$3.64M +$188K +50,244 +6%
Susquehanna International Group
23
Susquehanna International Group
Pennsylvania
$3.54M +$3.12M +834,087 +3,768%
SC
24
Stempoint Capital
New York
$3.51M -$179K -47,723 -5%
VFT
25
Vanguard Fiduciary Trust
Pennsylvania
$1.99M +$1.8M +480,733 New