X4 PHARMACEUTICALS INC

Historical 13F Holders

Symbol
XFOR
CUSIP
98420X202
All holders as of
Q2 2026
Type
Equity
Class
COM NEW
Reported Value, Excluding Options
Total Filings

13D/G Filers

Investors who own more than 5% of a class must file a Schedule 13D or 13G. Each filer's latest filing for 98420X202 since 12/18/2024, largest first.

Filer % of Class Filed
Morgan Stanley 13G/A
10.2% 3/6/2026
Event 2/28/2026
Empery Asset Management, LP 13G/A
10.0% 1/15/2026
Event 12/31/2025
Coastlands Capital LP 13G
10.0% 10/3/2025
Event 10/3/2025
Deep Track Capital, LP 13G/A
8.3% 8/14/2026
Event 6/30/2026
Perceptive Advisors LLC 13G/A
8.1% 8/14/2026
Event 6/30/2026
Bain Capital Life Sciences Fund, L.P. 13G/A
7.4% 2/17/2026
Event 12/31/2025
Saturn V Capital Management LP 13G
7.4% 2/17/2026
Event 10/24/2025
Growth Equity Opportunities 18 VGE, LLC 13D/A
6.2% 10/29/2025
Event 10/27/2025
BlackRock, Inc. 13G 5.9% 7/30/2026
Event 6/30/2026
Trails Edge Capital Partners, LP 13G/A
5.8% 2/17/2026
Event 12/31/2025
Venrock Healthcare Capital Partners III, L.P. 13G
5.6% 9/21/2026
Event 9/14/2026
Under 5%, checked the "5 percent or less" box, or amended by a later filing (3)
FMR LLC 13G/A
4.6% 10/7/2026
Event 9/30/2026
Biotechnology Value Fund L P 13G/A
3.9% 2/17/2026
Event 12/31/2025
Nantahala Capital Management, LLC 13G/A
2.8% 2/13/2026
Event 12/31/2025

13F Holders by Quarter

Period Filings Shares, Excl. Options Value, Excl. Options
2026 Q3 2 1.17 k $3.41 k
2026 Q2 94 102 M $478 M
2026 Q1 84 95.0 M $393 M
2025 Q4 77 85.9 M $344 M
2025 Q3 42 13.7 M $46.7 M
2025 Q2 53 2.15 M $4.09 M
2025 Q1 2 83.0 k $20.0 k