Company · CIK 0000882361 · SIC 2836 — Biological Products, (No Diagnostic Substances)
Aptose Biosciences Inc. · APTOF
Insider activity reported against this company. All insider holders · On EDGAR ↗
Reported at this company — common stock
| Trade | Reported (ET) | Insider | Shares | Avg price | Total | Owned after | Δ stake | Flags |
|---|---|---|---|---|---|---|---|---|
| Jun 30, 2026 DForm 4 → | Jul 2, 11:01 am EDT | Bernd R. SeizingerOther | 17,000 | $1.72 | $29,240 | 0 | — | |
| Jun 30, 2026 DForm 4 → | Jul 1, 5:09 pm EDT | Warren WhiteheadOther | 33 | $1.72 | $57 | 0 | — | |
| Jun 30, 2026 DForm 4 → | Jul 1, 5:01 pm EDT | William G. RiceChair, President & CEO, Director | 613,252 | $1.72 | $1,054,793 | 0 | — | |
| Jun 30, 2026 DForm 4 → | Jul 1, 4:55 pm EDT | Erich PlatzerOther | 1,122 | $1.72 | $1,930 | 0 | — | |
| Jun 30, 2026 DForm 4 → | Jul 1, 4:49 pm EDT | Fletcher PayneOther | 244 | $1.72 | $420 | 0 | — | |
| Jun 30, 2026 DForm 4 → | Jul 1, 4:47 pm EDT | Denis R BurgerOther | 70 | $1.72 | $120 | 0 | — | |
| Jun 30, 2026 DForm 4 → | Jul 1, 4:34 pm EDT | Rafael BejarOther | 244 | $1.72 | $420 | 0 | — |
Reported at this company — derivatives (options, RSUs, warrants)
| Trade | Reported (ET) | Insider | Shares | Avg price | Total | Owned after | Δ stake | Flags |
|---|---|---|---|---|---|---|---|---|
| Jun 30, 2026 DForm 4 → | Jul 2, 11:01 am EDT | Bernd R. SeizingerOther | 153,333 | — | — | 0 | — | |
| Jun 30, 2026 DForm 4 → | Jul 1, 5:09 pm EDT | Warren WhiteheadOther | 548,833 | — | — | 0 | — | |
| Jun 30, 2026 DForm 4 → | Jul 1, 5:03 pm EDT | Mark D. VincentOther | 522,333 | — | — | 0 | — | |
| Jun 30, 2026 DForm 4 → | Jul 1, 5:01 pm EDT | William G. RiceChair, President & CEO, Director | 5,413,000 | — | — | 0 | — | |
| Jun 30, 2026 DForm 4 → | Jul 1, 4:55 pm EDT | Erich PlatzerOther | 503,333 | — | — | 0 | — | |
| Jun 30, 2026 DForm 4 → | Jul 1, 4:49 pm EDT | Fletcher PayneOther | 1,255,000 | — | — | 0 | — | |
| Jun 30, 2026 DForm 4 → | Jul 1, 4:47 pm EDT | Denis R BurgerOther | 528,667 | — | — | 0 | — | |
| Jun 30, 2026 DForm 4 → | Jul 1, 4:34 pm EDT | Rafael BejarOther | 1,578,000 | — | — | 0 | — |