X4 Pharmaceuticals
XFOR · NASDAQ
$3.02+$0.27 (+9.82%)TodayMarket closed ·
Prev close $2.75
Who owns XFOR
Largest institutional holders, from their latest 13F filings
The 10 largest institutions hold 69.9% of XFOR’s shares.
- Morgan Stanley Investment Management Inc. (US)10.0%
- Fidelity Management & Research Company LLC8.8%
- Bain Capital Life Sciences Investors, LLC8.4%
- Perceptive Advisors LLC8.4%
- Next 6 largest institutions34.3%
- All other shareholders30.1%
| Holder | Shares | % of shares |
|---|---|---|
| Morgan Stanley Investment Management Inc. (US) | 9.42M | 9.99% |
| Fidelity Management & Research Company LLC | 8.32M | 8.82% |
| Bain Capital Life Sciences Investors, LLC | 7.97M | 8.45% |
| Perceptive Advisors LLC | 7.93M | 8.41% |
| Saturn V Capital Management LP | 6.97M | 7.39% |
| Empery Asset Management, L.P. | 6.93M | 7.35% |
| Deep Track Capital LP | 5.88M | 6.23% |
| BlackRock Institutional Trust Company, N.A. | 5.10M | 5.41% |
| Kalehua Capital Management LLC | 3.72M | 3.95% |
| Vanguard Capital Management, LLC | 3.72M | 3.94% |
Largest mutual fund holders
| Holder | Shares | % of shares |
|---|---|---|
| Fidelity Small Cap Growth Fund | 3.39M | 3.59% |
| Vanguard Total Stock Market Index Fund | 2.60M | 2.76% |
| Morgan Stanley Institutional Small Co. Inception Portfolio | 2.31M | 2.45% |
| iShares Russell 2000 ETF | 1.98M | 2.10% |
| Fidelity Small Cap Growth K6 Fund | 1.69M | 1.79% |
Insider trades
Form 4 filings by officers, directors and large holders
Over the last 6 months, insiders sold $462.96K (5 trades) of XFOR on the open market, with no buys.
| Insider | Type | Shares | Value |
|---|---|---|---|
| KIRSKE DAVID | Sale | 11.77K | $33.66K |
| Volpone John | Sale | 24.58K | $109.23K |
| Craig Adam R | Sale | 47.44K | $210.83K |
| Gold Kelly | Award | 110.00K | — |
| KIRSKE DAVID | Sale | 8.54K | $36.43K |
| KIRSKE DAVID | Sale | 16.96K | $72.82K |
Short interest
Settled Sep 30, 2026
- Shares short
- 7.59M
- Days to cover
- 6.04
- % of shares outstanding
- 8.05%
- Average daily volume
- 1.26M
- Change since last report
- −7.8%
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