8 insiders reported 9 Form 4 transactions for Aptose Biosciences Inc. (APTO) over the past 18 months (most recent 2026-07-02). Recent activity: Seizinger Bernd R. (Insider) Sell 17,000 shares, Bejar Rafael (Insider) Sell 244 shares, PLATZER ERICH (Insider) Sell 1,122 shares, Payne Fletcher (Insider) Sell 222 shares, Vincent Mark D. (Insider) Sell 14 shares. Source: SEC Form 4.
| Date | Insider | Title | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-07-02 | Seizinger Bernd R. | Insider | Sell | 17,000 | $29,240 |
| 2026-07-01 | Bejar Rafael | Insider | Sell | 244 | $420 |
| 2026-07-01 | PLATZER ERICH | Insider | Sell | 1,122 | $1,930 |
| 2026-07-01 | Payne Fletcher | Insider | Sell | 222 | $382 |
| 2026-07-01 | Vincent Mark D. | Insider | Sell | 14 | $24 |
| 2026-07-01 | Whitehead Warren | Insider | Sell | 33 | $57 |
| 2026-07-01 | Rice William G. | Chair, President & CEO | Sell | 613,252 | $1.1M |
| 2026-07-01 | BURGER DENIS R | Insider | Sell | 70 | $120 |
| 2026-07-01 | Payne Fletcher | Insider | Sell | 22 | $38 |
Source: SEC Form 4 filings · as of 2026-07-02