X4 Pharmaceuticals Ownership | Who Owns X4 Pharmaceuticals?
X4 Pharmaceuticals Ownership Summary
X4 Pharmaceuticals is owned by 213.84% institutional investors, 0.61% insiders. Vanguard group is the largest institutional shareholder, holding 46.18% of XFOR shares. Fidelity Small Cap Growth is the top mutual fund, with 3.72% of its assets in X4 Pharmaceuticals shares.
XFOR Ownership Benchmark
| Type | Name | % Inst | % Insiders | % Retail |
|---|---|---|---|---|
| Stock | X4 Pharmaceuticals | 213.84% | 0.61% | -114.44% |
| Sector | Healthcare Stocks | 35.49% | 11.75% | 52.76% |
| Industry | Biotech Stocks | 34.83% | 11.71% | 53.46% |
Institutional Shareholders
Top Institutional Shareholders by Total Shares
| Holder | Shares | % Holding | Value |
|---|---|---|---|
| Vanguard group | 3.42M | 46.18% | $13.69M |
| Morgan stanley | 9.47M | 22.38% | $39.10M |
| Empery asset management, lp | 8.94M | 21.15% | $36.94M |
| Fmr | 8.10M | 19.16% | $33.47M |
| Bain capital life sciences investors | 7.97M | 18.84% | $32.91M |
| Perceptive advisors | 6.74M | 15.93% | $27.83M |
| Saturn v capital management | 6.46M | 15.27% | $26.67M |
| Deep track capital, lp | 6.34M | 14.99% | $26.18M |
| Kingdon capital management | 933.33K | 12.59% | $3.19M |
| Braidwell lp | 3.27M | 7.74% | $13.52M |
Top Institutional Shareholders by % of Total Assets
| Holder | Shares | % Assets | Value |
|---|---|---|---|
| Empery asset management, lp | 8.94M | 44.50% | $36.94M |
| Rosalind advisors | 3.21M | 5.33% | $13.28M |
| Saturn v capital management | 6.46M | 4.83% | $26.67M |
| Bain capital life sciences investors | 7.97M | 2.97% | $32.91M |
| Caxton | 15.56K | 1.60% | $64.25K |
| Samsara biocapital | 1.83M | 0.74% | $7.57M |
| Stempoint capital lp | 850.74K | 0.68% | $3.51M |
| Stonepine capital management | 335.31K | 0.55% | $1.38M |
| Perceptive advisors | 6.74M | 0.54% | $27.83M |
| Braidwell lp | 3.27M | 0.45% | $13.52M |
Top Buyers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Vanguard group | 3.42M | 0.00% | 3.01M |
| Blackrock | 10.68M | 0.00% | 1.94M |
| Deep track capital, lp | 6.34M | 0.43% | 1.33M |
| Morgan stanley | 9.47M | 0.00% | 1.26M |
| Millennium management | 1.21M | 0.00% | 1.15M |
Top Sellers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Nea management company | 499.56K | 0.07% | -14.49M |
| Orbimed advisors | - | - | -6.78M |
| Adage capital partners gp | - | - | -4.28M |
| Soleus capital management | - | - | -4.05M |
| Avidity partners management lp | - | - | -2.41M |
New Positions
| Holder | Shares | % Assets | Change | Value |
|---|---|---|---|---|
| Vanguard fiduciary trust | 480.73K | 0.00% | 480.73K | $1.99M |
| Boothbay fund management | 343.96K | 0.02% | 343.96K | $1.18M |
| Vr adviser | 330.52K | 0.05% | 330.52K | $1.37M |
| Brevan howard capital management lp | 127.32K | 0.00% | 127.32K | $525.84K |
| Catalyst funds management pty | 47.38K | 0.03% | 47.38K | $195.69K |
Sold Out
| Holder | Change |
|---|---|
| True wealth design | -3.00 |
| Frazier financial advisors | -10.00 |
| Headlands | -16.00 |
| Nelson, van denburg & campbell wealth management group | -22.00 |
| Eversource wealth advisors | -23.00 |
Institutional Ownership Trends
| Date | Holdings | Change % | Shares | Change % | Ownership | Change % | Increased Position | Change % | Decreased Position | Change % |
|---|---|---|---|---|---|---|---|---|---|---|
| Mar 31, 2026 | 81 | 6.58% | 90,437,640 | 5.26% | 213 | 0.02% | 39 | -30.36% | 22 | 214.29% |
| Dec 31, 2025 | 39 | -4.88% | 36,993,131 | 170.97% | 499 | 1.47% | 30 | 42.86% | 4 | -55.56% |
| Sep 30, 2025 | 22 | -55.10% | 3,669,963 | 33.55% | 49 | 3.60% | 10 | -16.67% | 5 | -86.11% |
| Jun 30, 2025 | 32 | -66.67% | 1,495,756 | -98.48% | - | 1028.22% | 8 | -80.95% | 23 | -4.17% |
| Mar 31, 2025 | 96 | 1.05% | 98,519,817 | -1.31% | 1 | 0.06% | 42 | 10.53% | 24 | 9.09% |
Top Mutual Funds Shareholders
| Holder | Shares | % Holding | Change |
|---|---|---|---|
| Fidelity Small Cap Growth | 3.39M | 3.72% | - |
| Vanguard US Total Market Shares ETF | 5.03M | 2.90% | 1.00 |
| Morgan Stanley Inception | 2.44M | 2.79% | 2.44M |
| Morgan Stanley Inst Inception I | 2.44M | 2.79% | 2.44M |
| Vanguard Total Stock Mkt Idx Inv | 2.49M | 2.73% | - |
| Fidelity Small Cap Growth K6 | 1.69M | 1.86% | - |
| EQ/Morgan Stanley Small Cap Growth K | 1.64M | 1.81% | 51.41K |
| Fidelity Select Biotechnology | 1.69M | 1.79% | - |
| Fidelity Advisor Biotechnology I | 1.34M | 1.42% | - |
| iShares Russell 2000 ETF | 84.03K | 1.17% | -14.31K |
Recent Insider Transactions
| Date | Name | Role | Activity | Value |
|---|---|---|---|---|
| May 12, 2026 | KIRSKE DAVID | Chief Financial Officer | Sell | $72.82K |
| Oct 23, 2025 | Craig Adam R | Executive Chairman | Buy | $250.00K |
| May 16, 2025 | Baldry Mark | Chief Commercial Officer | Buy | $2.56K |
| May 17, 2024 | Baldry Mark | Chief Commercial Officer | Buy | $14.65K |
| Nov 15, 2024 | Baldry Mark | Chief Commercial Officer | Buy | $4.60K |
Insider Transactions Trends
| Date | Buy | Sell |
|---|---|---|
| 2026 Q2 | - | 1 |
| 2026 Q1 | - | - |
| 2025 Q4 | 1 | - |
| 2025 Q3 | - | - |
| 2025 Q2 | 1 | - |
XFOR Ownership FAQ
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