X4 PHARMACEUTICALS INC (XFOR) is held by 45 institutional investors that disclose positions via SEC 13F filings. The largest disclosed holder is MORGAN STANLEY as of Q1 2026.

Are institutions buying or selling XFOR?

In Q1 2026, 22 institutions opened or increased positions in X4 PHARMACEUTICALS INC while 21 reduced or exited — a net buying quarter.

What is the Smart Money Verdict on XFOR?

The Smart Money Verdict combines four independent sources (institutional 13F activity, insider trades, activist filings, and congressional trades) into a single assessment for X4 PHARMACEUTICALS INC.

How many hedge funds hold XFOR?

45 institutional investors report holding X4 PHARMACEUTICALS INC (XFOR) as of Q1 2026, based on SEC 13F filings.

Is institutional money flowing into XFOR?

As of Q1 2026, tracked institutions in X4 PHARMACEUTICALS INC show 22 buyers versus 21 sellers — net inflows.

X4 PHARMACEUTICALS INC

XFOR·98420X202·US·Common Stock·Healthcare - Biotechnology-Activist

Holders

Avg rating(9 Elite)

$134M

Total Value

51% (51)

Fund Consensus

22 buying - 21 selling

Smart Money Verdict

View all

Held by 45 funds

9 elite

Who's Trading

ActivistPAPerceptive Advisors LLC7.3%May 15, 2026

InsiderKDKIRSKE DAVIDSell $73KMay 12, 2026

Activist

Morgan Stanley10.2%Mar 6, 2026

ActivistBVBIOTECHNOLOGY VALUE FUND L P2.1%Feb 17, 2026

ActivistSVSaturn V Capital Management LP7.4%Feb 17, 2026

ActivistBLBain Capital Life Sciences Fund, L.P.0.0%Feb 17, 2026

ActivistTETrails Edge Capital Partners, LP5.8%Feb 17, 2026

ActivistNANantahala Capital Management, LLC2.8%Feb 13, 2026

InsiderCRCraig Adam RBuy $250KOct 23, 2025

InsiderBMBaldry MarkBuy $3KMay 16, 2025

View all insider trades View all activist filings

13F: Mar 31, 2026Insider & Congress: Updated regularly

Fund	Action	Shares	Value	Weight	Est. P&L	Conviction
MORGAN STANLEY	Increased	9.5M(+15.3%)	$39.1M	0.0%	+8.74%	33
FMR LLC	Decreased	8.1M(-4.7%)	$33.5M	0.0%	+6.01%	0
VAVANGUARD CAPITAL MANAGEMENT LLC	New	3.5M	$14.4M	0.0%	+32.43%	39
Blackstone Inc.	Unchanged	2.7M	$11.1M	0.0%	+6.01%	0
BlackRock, Inc.	Decreased	1.2M(-1.2%)	$5M	0.0%	-14.31%	0
MILLENNIUM MANAGEMENT LLC	Increased	1.2M(+2062.5%)	$5M	0.0%	-13.85%	43
Woodline Partners LP	Increased	1M(+0.0%)	$4.1M	0.0%	+6.01%	27
GEODE CAPITAL MANAGEMENT, LLC	Decreased	939,726(-0.1%)	$3.9M	0.0%	-33.49%	0
GOLDMAN SACHS GROUP INC	Increased	882,134(+6.0%)	$3.6M	0.0%	+7.23%	28
SUSQUEHANNA INTERNATIONAL GROUP, LLP	Increased	856,222(+3768.2%)	$3.5M	0.0%	+31.58%	43
VFVANGUARD FIDUCIARY TRUST CO	New	480,733	$2M	0.0%	+32.43%	36
STATE STREET CORP	Increased	403,534(+103.6%)	$1.7M	0.0%	-1.61%	41
MWMARSHALL WACE, LLP	Increased	336,834(+318.7%)	$1.4M	0.0%	+24.99%	41
UBS Group AG	Increased	267,340(+6374.7%)	$1.1M	0.0%	+29.43%	41
Qube Research & Technologies Ltd	Increased	218,954(+223.2%)	$904,280	0.0%	+22.95%	40
NORTHERN TRUST CORP	Unchanged	178,235	$736,111	0.0%	+6.01%	0
BANK OF AMERICA CORP /DE/	Increased	150,676(+321.3%)	$622,292	0.0%	-26.42%	27
Brevan Howard Capital Management LP	New	127,321	$525,836	0.0%	+32.43%	33
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	Decreased	66,749(-0.1%)	$275,673	0.0%	+6.01%	0
OMERS ADMINISTRATION Corp	Decreased	57,300(-47.5%)	$236,649	0.0%	+6.01%	0