X4 Pharmaceuticals XFOR Institutional Ownership

NASDAQ XFOR

$2.90 +0.00 (+0.00%)

At close: Sep 30, 2026 · 4:00 PM EDT

Institutions by Trading Activity

90 Institutions

Increased 57 63.3%

Unchanged 20 22.2%

Reduced 13 14.4%

Ownership Statistics

13F · as of 30 Jun, 2026

Institutional Ownership

78.69%

▲+4.33 pp QoQ

Shares Held by Institutions

99.42Mn

of 126.34Mn outstanding

▲+9.97% QoQ

Shares Outstanding

126.34Mn

26.92Mn held outside 13F filers

Institutional Investors

filed 13F for Jun 2026

▲+6 vs prior quarter

Net Shares Added (QoQ)

+9.01Mn

accumulated since last quarter

Value of Holdings

$288.32Mn

reported market value

Shares Owned by Institutions

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Institutions

Accumulated Distributed

Latest quarter —

Net over range —

Accumulating quarters —

Ownership Summary

Quarter ending 30 Jun, 2026

X4 Pharmaceuticals, Inc (NASDAQ:XFOR) appears in 90 institutional 13F filings for the quarter ending June 2026.

Their combined ownership stood at 78.7% of outstanding shares in June 2026, up from 74.4% in March 2026.
Their total shares held in XFOR increased 9.97% from the prior quarter, while the number of investors in X4 Pharmaceuticals increased 76.47% year over year.
Activity in XFOR broke down as 57 buyers, 13 sellers, and 20 unchanged among 90 total holders.
Altogether, these fund groups held 99.42Mn shares in XFOR by June 2026, up by 9.01Mn shares quarter on quarter, and up 96.63Mn shares year over year.
Morgan Stanley is the top holder of X4 Pharmaceuticals as of June 30, 2026, with 9.46Mn shares representing 7.49% of outstanding stock.
Leading buyers of X4 Pharmaceuticals shares for the quarter ending June 2026 were BlackRock, Inc. (4.34Mn), Venrock Adviser, LLC (1.6Mn), PERCEPTIVE ADVISORS LLC (1.2Mn), GEODE CAPITAL MANAGEMENT, LLC (1.16Mn), State Street Corp (892.48K).
Top sellers of XFOR stock for the quarter ending June 2026 included Empery Asset Management, LP (2.01Mn), SUSQUEHANNA INTERNATIONAL GROUP, LLP (842.17K), Deep Track Capital, LP (460.78K), Samsara BioCapital, LLC (436.98K), BRAIDWELL LP (350.2K).
Per Business Quant, the top 10 investors in XFOR for the quarter ending June 2026 include Morgan Stanley (9.46Mn), FMR LLC (8.32Mn), Bain Capital Life Sciences Investors, LLC (7.97Mn), PERCEPTIVE ADVISORS LLC (7.93Mn), Saturn V Capital Management LP (6.97Mn), Empery Asset Management, LP (6.93Mn), Deep Track Capital, LP (5.88Mn), BlackRock, Inc. (5.55Mn), Kalehua Capital Management LLC (3.72Mn), VANGUARD CAPITAL MANAGEMENT LLC (3.72Mn).

Form 13F Holdings

90 Institutional Holders

Report period 30 Jun, 2026

Total shares held 99.42Mn

Of outstanding 78.69%

#	Institution	CIK	Shares Held	% of Outstanding	Change (QoQ)	Change (%)	Value (USD)
1	Morgan Stanley	0000895421	9,461,279	7.49%	▼5,713	-0.06%	$44.18Mn
2	FMR LLC	0000315066	8,321,657	6.59%	▲218,257	+2.69%	$38.86Mn
3	Bain Capital Life Sciences Investors, LLC	0001703031	7,967,454	6.31%	0	0.00%	$37.21Mn
4	PERCEPTIVE ADVISORS LLC	0001224962	7,933,491	6.28%	▲1,195,843	+17.75%	$37.05Mn
5	Saturn V Capital Management LP	0001964437	6,973,343	5.52%	▲516,697	+8.00%	$32.57Mn
6	Empery Asset Management, LP	0001469336	6,930,591	5.49%	▼2,013,527	-22.51%	$32.37Mn
7	Deep Track Capital, LP	0001856083	5,878,757	4.65%	▼460,778	-7.27%	$27.45Mn
8	BlackRock, Inc.	0002012383	5,554,906	4.40%	▲4,343,112	+358.40%	$25.94Mn
9	Kalehua Capital Management LLC	0002106181	3,722,840	2.95%	0	0.00%	$17.39Mn
10	VANGUARD CAPITAL MANAGEMENT LLC	0002100119	3,715,859	2.94%	▲218,247	+6.24%	$17.35Mn
11	NEA Management Company, LLC	0001512848	3,233,743	2.56%	0	0.00%	$15.10Mn
12	Rosalind Advisors, Inc.	0001622627	3,214,766	2.54%	0	0.00%	$15.01Mn
13	BRAIDWELL LP	0001920938	2,922,754	2.31%	▼350,200	-10.70%	$13.65Mn
14	Blackstone Inc.	0001393818	2,681,922	2.12%	0	0.00%	$12.52Mn
15	Trails Edge Capital Partners, LP	0002077247	2,571,478	2.04%	0	0.00%	$12.01Mn
16	Nantahala Capital Management, LLC	0001472322	2,449,468	1.94%	0	0.00%	$11.44Mn
17	BVF INC/IL	0001056807	2,233,742	1.77%	0	0.00%	$10.43Mn
18	GEODE CAPITAL MANAGEMENT, LLC	0001214717	2,098,047	1.66%	▲1,158,321	+123.26%	$9.80Mn
19	Venrock Adviser, LLC	0001615982	1,934,253	1.53%	▲1,603,728	+485.21%	$9.03Mn
20	Samsara BioCapital, LLC	0001744967	1,395,587	1.10%	▼436,979	-23.85%	$6.52Mn

Showing 1 to 20 of 90 holders