X4 PHARMACEUTICALS INC (XFOR)
Institutional ownership reported to the SEC as of Q2 2026, across 21 quarters.
87
Reporting holders
$480.7M
Reported value
103.3%
Of shares outstanding
0.5%
Held as options
+8
Holder change
Institutions report 102,440,277 shares against 99,146,743 outstanding. Shares only - option lines are excluded, which is why this can be compared with the company at all. The count comes from the cover page of the company's own most recent report, so it is dated when that was filed rather than at quarter end. Over 100% because an adviser and a sub-adviser can both report the same shares, and both are counted.
Options share is the part of reported value carried in derivative lines rather than shares. A high figure means institutions are expressing a view on this security without owning much of it.
Holders
| Filer | Value | Shares | Their book | Held | Change |
|---|---|---|---|---|---|
| MORGAN STANLEY | $44.2M | 9,461,279 | 0.00% | 5q | HELD |
| FMR LLC | $38.9M | 8,321,657 | 0.00% | 3q | +2.7%+$1.0M |
| Bain Capital Life Sciences Investors, LLC | $37.2M | 7,967,454 | 2.21% | 5q | HELD |
| PERCEPTIVE ADVISORS LLC | $37.0M | 7,933,491 | 0.56% | 3q | +17.7%+$5.6M |
| Kalehua Capital Management LLC | $34.8M | 7,445,680 | 11.09% | 3q | HELD |
| Saturn V Capital Management LP | $32.6M | 6,973,343 | 4.67% | 3q | +8.0%+$2.4M |
| Empery Asset Management, LP | $32.4M | 6,930,591 | 37.43% | 3q | -22.5%-$9.4M |
| Deep Track Capital, LP | $27.5M | 5,878,757 | 0.40% | 4q | -7.3%-$2.2M |
| BlackRock, Inc. | $25.9M | 5,554,906 | 0.00% | 5q | +358.4%+$20.3M |
| Nantahala Capital Management, LLC | $22.9M | 4,898,936 | 0.38% | 4q | +100.0%+$11.4M |
| VANGUARD CAPITAL MANAGEMENT LLC | $17.4M | 3,715,859 | 0.00% | 2q | +6.2%+$1.0M |
| Rosalind Advisors, Inc. | $15.0M | 3,214,766 | 5.58% | 4q | HELD |
| BRAIDWELL LP | $13.6M | 2,922,754 | 0.50% | 3q | -10.7%-$1.6M |
| Blackstone Inc. | $12.5M | 2,681,922 | 0.04% | 3q | HELD |
| Trails Edge Capital Partners, LP | $12.0M | 2,571,478 | 1.91% | 3q | HELD |
| BVF INC/IL | $10.4M | 2,233,742 | 0.27% | 4q | HELD |
| GEODE CAPITAL MANAGEMENT, LLC | $9.8M | 2,098,047 | 0.00% | 5q | +123.3%+$5.4M |
| Venrock Adviser, LLC | $9.0M | 1,934,253 | 0.27% | 2q | +485.2%+$7.5M |
| SAMSARA BIOCAPITAL, LLC | $6.5M | 1,395,587 | 0.54% | 3q | -23.8%-$2.0M |
| STATE STREET CORP | $6.1M | 1,296,017 | 0.00% | 5q | +221.2%+$4.2M |
| Woodline Partners LP | $4.7M | 1,001,095 | 0.01% | 3q | HELD |
| GOLDMAN SACHS GROUP INC | $4.3M | 916,536 | 0.00% | 3q | +3.9%+$160.7K |
| NORTHERN TRUST CORP | $3.0M | 652,849 | 0.00% | 3q | +266.3%+$2.2M |
| VANGUARD FIDUCIARY TRUST CO | $2.7M | 572,038 | 0.00% | 2q | +19.0%+$426.4K |
| VANGUARD PORTFOLIO MANAGEMENT LLC | $2.5M | 542,128 | 0.00% | new | NEW |
| Stonepine Capital Management, LLC | $2.1M | 449,978 | 0.54% | 4q | +34.2%+$535.5K |
| Verdad Advisers, LP | $1.6M | 352,093 | 1.57% | new | NEW |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | $1.2M | 14,050 | 0.00% | 5q | -98.4%-$74.0M |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $1.2M | 263,264 | 0.00% | 3q | +294.4%+$917.7K |
| Sixth Street Partners Management Company, L.P. | $1.2M | 263,264 | 0.00% | new | NEW |
| Caption Management, LLC | $1.2M | options only | 0.01% | new | OPTIONS |
| Bank of New York Mellon Corp | $916.9K | 196,340 | 0.00% | new | NEW |
| Affinity Asset Advisors, LLC | $677.1K | 145,000 | 0.03% | 3q | HELD |
| Nuveen, LLC | $501.5K | 107,389 | 0.00% | new | NEW |
| Invesco Ltd. | $451.9K | 96,772 | 0.00% | 2q | +384.6%+$358.7K |
| ALPS ADVISORS INC | $447.0K | 95,726 | 0.00% | new | NEW |
| RHUMBLINE ADVISERS | $444.0K | 95,081 | 0.00% | new | NEW |
| Susquehanna Portfolio Strategies, LLC | $407.6K | 87,282 | 0.01% | 3q | -14.9%-$71.5K |
| DEUTSCHE BANK AG\ | $368.4K | 78,885 | 0.00% | new | NEW |
| AMERICAN CENTURY COMPANIES INC | $349.3K | 74,795 | 0.00% | new | NEW |
| CITIGROUP INC | $327.4K | 70,112 | 0.00% | 5q | +96.0%+$160.4K |
| WELLS FARGO & COMPANY/MN | $316.2K | 67,712 | 0.00% | new | NEW |
| Palumbo Wealth Management LLC | $313.4K | 67,116 | 0.07% | 4q | -48.8%-$298.4K |
| Squarepoint Ops LLC | $313.3K | 67,078 | 0.00% | new | NEW |
| UBS Group AG | $271.1K | 58,043 | 0.00% | 5q | -78.3%-$977.4K |
| WELLINGTON MANAGEMENT GROUP LLP | $241.9K | 51,800 | 0.00% | new | NEW |
| MetLife Investment Management, LLC | $224.0K | 47,969 | 0.00% | new | NEW |
| BANK OF AMERICA CORP /DE/ | $218.8K | 46,861 | 0.00% | 5q | -68.9%-$484.8K |
| Point72 Asset Management, L.P. | $191.8K | 41,072 | 0.00% | new | NEW |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | $173.1K | 37,073 | 0.00% | new | NEW |
| Jump Financial, LLC | $160.0K | 34,253 | 0.00% | 2q | +178.1%+$102.4K |
| Vanguard Global Advisers, LLC | $154.0K | 32,977 | 0.00% | 2q | HELD |
| JPMORGAN CHASE & CO | $141.9K | 33,552 | 0.00% | 5q | +101572.7%+$141.8K |
| Police & Firemen's Retirement System of New Jersey | $111.4K | 23,846 | 0.00% | new | NEW |
| AXQ CAPITAL, LP | $106.8K | 22,880 | 0.01% | new | NEW |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE | $103.1K | 22,083 | 0.00% | new | NEW |
| BARCLAYS PLC | $90.8K | 19,439 | 0.00% | 3q | +590.8%+$77.6K |
| TWO SIGMA INVESTMENTS, LP | $90.7K | 19,426 | 0.00% | 4q | +40.1%+$26.0K |
| STIFEL FINANCIAL CORP | $86.5K | 18,519 | 0.00% | 3q | -15.0%-$15.3K |
| RENAISSANCE TECHNOLOGIES LLC | $84.5K | 18,100 | 0.00% | new | NEW |
| INTECH INVESTMENT MANAGEMENT LLC | $80.7K | 17,290 | 0.00% | new | NEW |
| NEW YORK STATE COMMON RETIREMENT FUND | $77.1K | 16,500 | 0.00% | new | NEW |
| BNP PARIBAS FINANCIAL MARKETS | $76.5K | 16,384 | 0.00% | 5q | +244.5%+$54.3K |
| VOYA INVESTMENT MANAGEMENT LLC | $74.0K | 15,838 | 0.00% | new | NEW |
| CAXTON CORP | $72.7K | 15,557 | 3.92% | 3q | HELD |
| WINTON GROUP Ltd | $67.2K | 14,400 | 0.00% | 2q | +35.8%+$17.7K |
| Creative Planning | $64.8K | 13,872 | 0.00% | 3q | HELD |
| ALLIANCEBERNSTEIN L.P. | $60.2K | 14,580 | 0.00% | new | NEW |
| PRUDENTIAL FINANCIAL INC | $58.4K | 12,500 | 0.00% | new | NEW |
| ProShare Advisors LLC | $49.4K | 10,588 | 0.00% | new | NEW |
| Indivisible Partners | $46.9K | 10,000 | 0.00% | 3q | HELD |
| Pettinga Financial Advisors LLC | $46.7K | 10,000 | 0.01% | new | NEW |
| Legal & General Group Plc | $36.7K | 7,858 | 0.00% | new | NEW |
| Tower Research Capital LLC (TRC) | $36.2K | 7,745 | 0.00% | 5q | +4202.8%+$35.3K |
| Ameritas Investment Partners, Inc. | $34.3K | 7,338 | 0.00% | new | NEW |
| Russell Investments Group, Ltd. | $33.5K | 7,178 | 0.00% | 5q | +884.6%+$30.1K |
| ROYAL BANK OF CANADA | $12.0K | 2,559 | 0.00% | new | NEW |
| PNC Financial Services Group, Inc. | $8.2K | 1,759 | 0.00% | 5q | HELD |
| Sterling Capital Management LLC | $7.6K | 1,629 | 0.00% | new | NEW |
| GROUP ONE TRADING LLC | $3.3K | 712 | 0.00% | 5q | HELD |
| Bleichroeder LP | $2.8K | 595 | 0.00% | 5q | HELD |
| Blue Trust, Inc. | $1.3K | 284 | 0.00% | 5q | HELD |
| GSA CAPITAL PARTNERS LLP | $356 | 76,314 | 0.02% | new | NEW |
| PRICE T ROWE ASSOCIATES INC /MD/ | $310 | 66,379 | 0.00% | new | NEW |
| Rockefeller Capital Management L.P. | $154 | 33 | 0.00% | 4q | HELD |
| JONES FINANCIAL COMPANIES LLLP | $153 | 38 | 0.00% | 5q | HELD |
| Caitong International Asset Management Co., Ltd | $140 | 30 | 0.00% | new | NEW |
| SBI Securities Co., Ltd. | $42 | 9 | 0.00% | 5q | -83.3% |
| HighMark Wealth Management LLC | $28 | 6 | 0.00% | 5q | HELD |
Five percent filings
Anyone crossing 5% of a company must say so within days - far sooner than the next quarterly holdings report. A 13D declares an intent to influence the company; a 13G is the passive version. See all activist filings →
| Filed | Form | Filer | % of class |
|---|---|---|---|
| 2026-08-14 | 13G/A | Deep Track Capital, LPwith 3 co-filers | 8.3% |
| 2026-08-14 | 13G/A | Perceptive Advisors LLCwith 2 co-filers | 8.1% |
| 2026-07-30 | 13G | BlackRock, Inc. | 5.9% |
Quarter by quarter
Coverage begins with the quarter ending 2018-12-31. Earlier filings exist only as occasional late amendments, too sparse to describe a market, so they are not shown.
| Quarter | Holders | Value | Shares | New | Added | Trimmed | Options |
|---|---|---|---|---|---|---|---|
| Q2 2026 | 87 | $480.7M | 102,440,277 | 32 | 24 | 11 | 0.5% |
| Q1 2026 | 79 | $392.6M | 94,997,690 | 14 | 22 | 17 | 0.0% |
| Q4 2025 | 74 | $344.8M | 85,897,357 | 36 | 16 | 7 | 0.4% |
| Q3 2025 | 41 | $47.9M | 13,652,304 | 11 | 10 | 10 | 2.4% |
| Q2 2025 | 46 | $4.6M | 1,995,744 | 47 | 0 | 1 | 17.0% |
| Q1 2025 | 4 | $82.3K | 83,045 | 3 | 0 | 0 | 100.0% |
| Q4 2024 | 2 | $229.0K | 0 | 0 | 0 | 0 | 100.0% |
| Q3 2024 | 2 | $190.1K | 0 | 0 | 0 | 0 | 100.0% |
| Q2 2024 | 2 | $155.1K | 0 | 0 | 0 | 0 | 100.0% |
| Q1 2024 | 2 | $262.4K | 0 | 0 | 0 | 0 | 100.0% |
| Q4 2023 | 2 | $400.8K | 0 | 0 | 0 | 0 | 100.0% |
| Q3 2023 | 3 | $506.1K | 0 | 0 | 0 | 0 | 100.0% |
| Q2 2023 | 3 | $1.4M | 0 | 2 | 0 | 0 | 100.0% |
| Q1 2023 | 2 | $12.9K | 0 | 0 | 0 | 0 | 100.0% |
| Q4 2022 | 2 | $13.9K | 0 | 1 | 0 | 0 | 100.0% |
| Q3 2022 | 2 | $122.0K | 0 | 0 | 0 | 0 | 100.0% |
| Q2 2022 | 2 | $168.0K | 0 | 0 | 0 | 0 | 100.0% |
| Q1 2022 | 2 | $1.4M | 0 | 0 | 0 | 0 | 100.0% |
| Q4 2021 | 2 | $117.0K | 0 | 2 | 0 | 0 | 100.0% |
| Q3 2021 | 2 | $23.0K | 0 | 1 | 0 | 0 | 100.0% |
| Q2 2021 | 1 | $16.0K | 0 | 1 | 0 | 0 | 100.0% |