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, Vincent Mark D. (Insider) Sell 14 shares, BURGER DENIS R (Insider) Sell 70 shares, PLATZER ERICH (Insider) Sell 1,122 shares, Payne Fletcher (Insider) Sell 222 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 | Vincent Mark D. | Insider | Sell | 14 | $24 |
| 2026-07-01 | BURGER DENIS R | Insider | Sell | 70 | $120 |
| 2026-07-01 | PLATZER ERICH | Insider | Sell | 1,122 | $1,930 |
| 2026-07-01 | Payne Fletcher | Insider | Sell | 222 | $382 |
| 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 | Bejar Rafael | Insider | Sell | 244 | $420 |
| 2026-07-01 | Payne Fletcher | Insider | Sell | 22 | $38 |
Source: SEC Form 4 filings · as of 2026-07-02