XFOR X4 Pharmaceuticals, Inc.
X4 Pharmaceuticals, Inc. (XFOR) Institutional Ownership
What the institutions did with XFOR last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended June 30, 2026.
Every manager below opens. Subscribers can see any firm's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.
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Each block is one manager, sized by shares held and colored by how much they moved the position last quarter. Green added, red cut, grey stood pat.
Largest holders
| Manager | Shares | % of reported |
|---|---|---|
| MORGAN STANLEY | 9.5M | 9.0% |
| FMR LLC | 8.3M | 7.9% |
| Bain Capital Life Sciences Investors, LLC | 8.0M | 7.6% |
| PERCEPTIVE ADVISORS LLC | 7.9M | 7.5% |
| Kalehua Capital Management LLC | 7.4M | 7.1% |
| Saturn V Capital Management LP | 7.0M | 6.6% |
| Empery Asset Management, LP | 6.9M | 6.6% |
| Deep Track Capital, LP | 5.9M | 5.6% |
| BlackRock, Inc. | 5.6M | 5.3% |
| Nantahala Capital Management, LLC | 4.9M | 4.7% |
| VANGUARD CAPITAL MANAGEMENT LLC | 3.7M | 3.5% |
| NEA Management Company, LLC | 3.2M | 3.1% |
| Rosalind Advisors, Inc. | 3.2M | 3.1% |
| BRAIDWELL LP | 2.9M | 2.8% |
| Blackstone Inc. | 2.7M | 2.5% |
| Trails Edge Capital Partners, LP | 2.6M | 2.4% |
| BVF INC/IL | 2.2M | 2.1% |
| GEODE CAPITAL MANAGEMENT, LLC | 2.1M | 2.0% |
| Venrock Adviser, LLC | 1.9M | 1.8% |
| SAMSARA BIOCAPITAL, LLC | 1.4M | 1.3% |
| STATE STREET CORP | 1.3M | 1.2% |
| Woodline Partners LP | 1.0M | 1.0% |
| GOLDMAN SACHS GROUP INC | 916.5K | 0.9% |
| NORTHERN TRUST CORP | 652.8K | 0.6% |
| VANGUARD FIDUCIARY TRUST CO | 572.0K | 0.5% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| BlackRock, Inc. | Increased | 1.2M | 5.6M | +4.3M |
| Nantahala Capital Management, LLC | Increased | 2.4M | 4.9M | +2.4M |
| Empery Asset Management, LP | Reduced | 8.9M | 6.9M | -2.0M |
| STEMPOINT CAPITAL LP | Sold Out | 1.7M | 0 | -1.7M |
| Venrock Adviser, LLC | Increased | 330.5K | 1.9M | +1.6M |
| MILLENNIUM MANAGEMENT LLC | Sold Out | 1.2M | 0 | -1.2M |
| PERCEPTIVE ADVISORS LLC | Increased | 6.7M | 7.9M | +1.2M |
| GEODE CAPITAL MANAGEMENT, LLC | Increased | 939.7K | 2.1M | +1.2M |
| STATE STREET CORP | Increased | 403.5K | 1.3M | +892.5K |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | 856.2K | 14.1K | -842.2K |
| VANGUARD PORTFOLIO MANAGEMENT LLC | New | 0 | 542.1K | +542.1K |
| Saturn V Capital Management LP | Increased | 6.5M | 7.0M | +516.7K |
| NORTHERN TRUST CORP | Increased | 178.2K | 652.8K | +474.6K |
| Deep Track Capital, LP | Reduced | 6.3M | 5.9M | -460.8K |
| SAMSARA BIOCAPITAL, LLC | Reduced | 1.8M | 1.4M | -437.0K |
| Verdad Advisers, LP | New | 0 | 352.1K | +352.1K |
| BRAIDWELL LP | Reduced | 3.3M | 2.9M | -350.2K |
| MARSHALL WACE, LLP | Sold Out | 336.8K | 0 | -336.8K |
| ACORN CAPITAL ADVISORS, LLC | Sold Out | 234.0K | 0 | -234.0K |
| Qube Research & Technologies Ltd | Sold Out | 219.0K | 0 | -219.0K |
| FMR LLC | Increased | 8.1M | 8.3M | +218.3K |
| VANGUARD CAPITAL MANAGEMENT LLC | Increased | 3.5M | 3.7M | +218.2K |
| UBS Group AG | Reduced | 267.3K | 58.0K | -209.3K |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | Increased | 66.7K | 263.3K | +196.5K |
| Bank of New York Mellon Corp | New | 0 | 196.3K | +196.3K |
| Pale Fire Capital SE | Sold Out | 167.6K | 0 | -167.6K |
| Brevan Howard Capital Management LP | Sold Out | 127.3K | 0 | -127.3K |
| Stonepine Capital Management, LLC | Reduced | 335.3K | 225.0K | -110.3K |
| Nuveen, LLC | New | 0 | 107.4K | +107.4K |
| BANK OF AMERICA CORP /DE/ | Reduced | 150.7K | 46.9K | -103.8K |
| ALPS ADVISORS INC | New | 0 | 95.7K | +95.7K |
| RHUMBLINE ADVISERS | New | 0 | 95.1K | +95.1K |
| VANGUARD FIDUCIARY TRUST CO | Increased | 480.7K | 572.0K | +91.3K |
| DEUTSCHE BANK AG\ | New | 0 | 78.9K | +78.9K |
| Invesco Ltd. | Increased | 20.0K | 96.8K | +76.8K |
| GSA CAPITAL PARTNERS LLP | New | 0 | 76.3K | +76.3K |
| AMERICAN CENTURY COMPANIES INC | New | 0 | 74.8K | +74.8K |
| WELLS FARGO & COMPANY/MN | New | 0 | 67.7K | +67.7K |
| Squarepoint Ops LLC | New | 0 | 67.1K | +67.1K |
| PRICE T ROWE ASSOCIATES INC /MD/ | New | 0 | 66.4K | +66.4K |
| Palumbo Wealth Management LLC | Reduced | 131.0K | 67.1K | -63.9K |
| OMERS ADMINISTRATION Corp | Sold Out | 57.3K | 0 | -57.3K |
| WELLINGTON MANAGEMENT GROUP LLP | New | 0 | 51.8K | +51.8K |
| Hudson Bay Capital Management LP | Sold Out | 50.3K | 0 | -50.3K |
| MetLife Investment Management, LLC | New | 0 | 48.0K | +48.0K |
| Catalyst Funds Management Pty Ltd | Sold Out | 47.4K | 0 | -47.4K |
| Point72 Asset Management, L.P. | New | 0 | 41.1K | +41.1K |
| JANE STREET GROUP, LLC | Sold Out | 37.1K | 0 | -37.1K |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | New | 0 | 37.1K | +37.1K |
| Dynamic Technology Lab Private Ltd | Sold Out | 36.2K | 0 | -36.2K |
| GOLDMAN SACHS GROUP INC | Increased | 882.1K | 916.5K | +34.4K |
| CITIGROUP INC | Increased | 35.8K | 70.1K | +34.3K |
| JPMORGAN CHASE & CO | Increased | 33 | 33.6K | +33.5K |
| Diametric Capital, LP | Sold Out | 29.0K | 0 | -29.0K |
| Police & Firemen's Retirement System of New Jersey | New | 0 | 23.8K | +23.8K |
| AXQ CAPITAL, LP | New | 0 | 22.9K | +22.9K |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE | New | 0 | 22.1K | +22.1K |
| Jump Financial, LLC | Increased | 12.3K | 34.3K | +21.9K |
| Schonfeld Strategic Advisors LLC | Sold Out | 19.5K | 0 | -19.5K |
| Jefferies Financial Group Inc. | Sold Out | 19.5K | 0 | -19.5K |
13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.