KIRSKE DAVID has filed 5 insider transactions across 1 company since August 2025.
Most recent transaction: a sale of 16961 shares of X4 Pharmaceuticals, Inc ($XFOR) on May 12, 2026.
Activity breakdown: 0 open-market purchases and 1 sale.
| Transaction Date | Company | Ticker | Insider Name | Title | Transaction Type | Security | Shares | Price | Shares Owned Following | Total Shares Outstanding | % of Owned | % of Outstanding |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| May 12, 2026 | X4 Pharmaceuticals, Inc | $XFOR | KIRSKE DAVID | Chief Financial Officer | S | Common Stock | 16961 | $4.29 | 176,293.0000 | 43,272,773 | 8.78% | 0.04% |
| Oct. 29, 2025 | X4 Pharmaceuticals, Inc | $XFOR | KIRSKE DAVID | Chief Financial Officer | A | Stock Option (right to buy) | 1552769 | $0.00 | 1,552,769.0000 | 43,272,773 | 9999.99% | 3.59% |
| Aug. 14, 2025 | X4 Pharmaceuticals, Inc | $XFOR | KIRSKE DAVID | Chief Financial Officer | A | Common Stock | 193254 | $0.00 | 193,254.0000 | 201,062,211 | 9999.99% | 0.10% |
| Aug. 12, 2025 | X4 Pharmaceuticals, Inc | $XFOR | KIRSKE DAVID | Chief Financial Officer | A | Stock Option (right to buy) | 1073249 | $0.00 | 1,073,249.0000 | 201,062,211 | 9999.99% | 0.53% |
| Aug. 14, 2025 | X4 Pharmaceuticals, Inc | $XFOR | KIRSKE DAVID | Chief Financial Officer | A | Stock Option (right to buy) | 352800 | $0.00 | 352,800.0000 | 201,062,211 | 9999.99% | 0.18% |