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XFOR · X4 Pharmaceuticals, Inc

Track XFOR — free Ask ALVIS about XFOR
$4.01 +0.08 (+1.91%)
Market Cap
$370.68M
Shares
94.32M

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

The Jun 30, 2026 filing window is still open — showing the latest known positions. Funds that have not filed yet carry their prior-quarter positions; a fund that filed without this stock counts as sold out.
Holders: 83
Total Value: $373,663,917
Total Shares: 90,470,858

Institutional Ownership Trend

6 quarters

Holder Concentration

Across 82 13F filers
Top Holder
10.5%
Mar 2025 → Mar 2026 · range 10.4% – 100.0%
of institutional value
Top 5
45.6%
Mar 2025 → Mar 2026 · range 45.6% – 100.0%
of institutional value
Top 10
71.3%
Mar 2025 → Mar 2026 · range 71.2% – 100.0%
of institutional value
HHI
623
Mar 2025 → Mar 2026 · range 623 – 9,993
Broadly held
Showing 83 of 83
All Common Calls Puts
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Holder Value (USD) % of 13F Shares Open
Mega MORGAN STANLEY $39,098,675 10.46% 9,466,992
Micro Empery Asset Management, LP $36,939,207 9.89% 8,944,118
Mega FMR LLC $33,467,042 8.96% 8,103,400
Mid Bain Capital Life Sciences Investors, LLC $32,905,585 8.81% 7,967,454
Mid PERCEPTIVE ADVISORS LLC $27,826,486 7.45% 6,737,648
Small Saturn V Capital Management LP $26,665,947 7.14% 6,456,646
Mid Deep Track Capital, LP $26,182,279 7.01% 6,339,535
Small Kalehua Capital Management LLC $15,375,329 4.11% 3,722,840
Mega VANGUARD CAPITAL MANAGEMENT LLC $14,445,137 3.87% 3,497,612
Mid BRAIDWELL LP $13,517,300 3.62% 3,272,954
Small Rosalind Advisors, Inc. $13,276,983 3.55% 3,214,766
Large Blackstone Inc. $11,076,337 2.96% 2,681,922
Small Trails Edge Capital Partners, LP $10,620,204 2.84% 2,571,478
Mid Nantahala Capital Management, LLC $10,116,302 2.71% 2,449,468
Mid BVF INC/IL $9,225,354 2.47% 2,233,742
Mid SAMSARA BIOCAPITAL, LLC $7,568,497 2.03% 1,832,566
Mega BlackRock, Inc. $5,004,708 1.34% 1,211,794
Mega MILLENNIUM MANAGEMENT LLC $4,999,422 1.34% 1,210,514
Large Woodline Partners LP $4,134,522 1.11% 1,001,095
Mega GEODE CAPITAL MANAGEMENT, LLC $3,881,067 1.04% 939,726
Mega GOLDMAN SACHS GROUP INC $3,643,213 0.97% 882,134
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $3,536,196 0.95% 856,222
Small STEMPOINT CAPITAL LP $3,513,564 0.94% 850,742
Mega VANGUARD FIDUCIARY TRUST CO Bank $1,985,427 0.53% 480,733
Mega STATE STREET CORP $1,666,595 0.45% 403,534
Large MARSHALL WACE, LLP $1,391,124 0.37% 336,834
Small Stonepine Capital Management, LLC $1,384,826 0.37% 335,309
Mid Venrock Adviser, LLC $1,365,068 0.37% 330,525
Mega UBS Group AG $1,104,114 0.30% 267,340
Large Qube Research & Technologies Ltd $904,280 0.24% 218,954
Mega NORTHERN TRUST CORP Bank $736,110 0.20% 178,235
Mid Pale Fire Capital SE $692,146 0.19% 167,590
Mega BANK OF AMERICA CORP /DE/ Bank $622,291 0.17% 150,676
Mid Affinity Asset Advisors, LLC $598,850 0.16% 145,000
Small Palumbo Wealth Management LLC $541,087 0.14% 131,014
Mid Brevan Howard Capital Management LP $525,835 0.14% 127,321
Mid Susquehanna Portfolio Strategies, LLC $423,733 0.11% 102,599
Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC $275,673 0.07% 66,749
Large OMERS ADMINISTRATION Corp $236,649 0.06% 57,300
Large Hudson Bay Capital Management LP $207,685 0.06% 50,287
Small Catalyst Funds Management Pty Ltd $195,691 0.05% 47,383
Mega JANE STREET GROUP, LLC $153,400 0.04% 37,143
Small Dynamic Technology Lab Private Ltd $149,592 0.04% 36,221
Mega CITIGROUP INC $147,709 0.04% 35,765
Mega Vanguard Global Advisers, LLC $136,195 0.04% 32,977
Small Diametric Capital, LP $119,658 0.03% 28,973
Large Police & Firemen's Retirement System of New Jersey Pension $111,360 0.03% 23,846
Large STIFEL FINANCIAL CORP $89,988 0.02% 21,789
Mega Invesco Ltd. $82,467 0.02% 19,968
Large Schonfeld Strategic Advisors LLC $80,592 0.02% 19,514
Large Jefferies Financial Group Inc. $80,427 0.02% 19,474
Micro CAXTON CORP $64,250 0.02% 15,557
Large ExodusPoint Capital Management, LP $60,723 0.02% 14,703
Mega TWO SIGMA INVESTMENTS, LP $57,274 0.02% 13,868
Large Creative Planning $57,072 0.02% 13,819
Mid Virtu Financial LLC $52,574 0.01% 12,730
Mid Jump Financial, LLC $50,869 0.01% 12,317
Mid Vanguard Personalized Indexing Management, LLC $47,598 0.01% 11,525
Small Pettinga Financial Advisors LLC $46,700 0.01% 10,000
Mid SummitTX Capital, L.P. $46,256 0.01% 11,200
Mid WINTON GROUP Ltd $43,778 0.01% 10,600
Small Indivisible Partners $41,300 0.01% 10,000
Mega BNP PARIBAS ARBITRAGE, SA $19,642 0.01% 4,756
Mega BARCLAYS PLC $11,621 0.00% 2,814
Mid Sterling Capital Management LLC $7,607 0.00% 1,629
Mega PNC FINANCIAL SERVICES GROUP, INC. $7,264 0.00% 1,759
Small State of Wyoming $4,398 0.00% 1,065
Large ACADIAN ASSET MANAGEMENT LLC $3,312 0.00% 802
Large Russell Investments Group, Ltd. $3,010 0.00% 729
Mid GROUP ONE TRADING LLC $2,940 0.00% 712
Small Bleichroeder LP $2,457 0.00% 595
Mid Blue Trust, Inc. $1,326 0.00% 284
Mid Allworth Financial LP $1,280 0.00% 310
Mid Tower Research Capital LLC (TRC) $743 0.00% 180
Mid QUADRANT CAPITAL GROUP LLC $528 0.00% 128
Mid Parallel Advisors, LLC $479 0.00% 116
Mega ROYAL BANK OF CANADA Bank $474 0.00% 115
Large JONES FINANCIAL COMPANIES LLLP $156 0.00% 38
Large Rockefeller Capital Management L.P. $136 0.00% 33
Mega JPMORGAN CHASE & CO $136 0.00% 33
Mid SBI Securities Co., Ltd. Broker-Dealer $42 0.00% 9
Micro HighMark Wealth Management LLC $24 0.00% 6
Large NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO $20 0.00% 5
Key facts CIK 1501697 CUSIP 98420X202 13F (30d) 5 filings 5 filers Visit website Investor relations

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