// company-profile
X4 Pharmaceuticals, Inc
XFORExchangeNasdaqSectorBiological Products, (No Diagnostic Substances)Inc.DEFilings92Insiders18
// api This X4 Pharmaceuticals, Inc insider-trading data is served live by the Form4API insider trading API. Get the same data via API.
// activity-summary
No insider transactions in the last 30 days.
// 90-day insight
Over the last 90 days, X4 Pharmaceuticals, Inc insiders sold $73K across 1 transaction with no open-market purchases.
- Most active insider: KIRSKE DAVID with 1 transaction totaling $73K.
- Largest single sale: $73K by KIRSKE DAVID on May 12, 2026.
Activity skews bearish — sales outpace buys.
Institutional Ownership
Top 13F-HR holders of X4 Pharmaceuticals, Inc as of 2026-03-31
Total reported AUM
$371.3M
QoQ change
+13.0%
Reporting period
2026-03-31
#1
MORGAN STANLEY
CIK 895421
$39.0M
9.4M shares
#2
Empery Asset Management, LP
CIK 1469336
$36.9M
8.9M shares
#3
FMR LLC
CIK 315066
$33.5M
8.1M shares
Data source: SEC Form 13F-HR filings. Joined with insider activity above — see who's loading up institutionally while insiders are trading. Full 13F-HR API →
Insider Transactions
Sourced from SEC EDGAR Form 4 filings. Updated hourly.
| Date | Insider | Company | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| May 12, 2026 | KIRSKE DAVID | XFOR | Sale | 16,961 | $4.29 | $73K |
| Jan 1, 2026 | de Craecker Francoise | XFOR | Award | 110,000 | $0.00 | $0K |
| Jan 1, 2026 | WYZGA MICHAEL S | XFOR | Award | 110,000 | $0.00 | $0K |
| Jan 1, 2026 | Bridger Gary | XFOR | Award | 110,000 | $0.00 | $0K |
| Jan 1, 2026 | Stewart Murray | XFOR | Award | 110,000 | $0.00 | $0K |
45 more transactions hidden
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