APTO insider transaction filings
Aptose Biosciences Inc. — 20 most recent Form 4 filings from SEC EDGAR, normalized by FilingPulse. Latest filing: 2026-07-02. Screen APTO transaction legs live →
Insider transaction summary — last 90 days
2026-06-24 to 2026-09-22, from the filings listed below: 8 Form 4 filings. Counts and totals are arithmetic on values as filed — descriptive data, not a recommendation.
- Open-market purchases (code P, non-derivative): none reported.
- Open-market sales (code S, non-derivative): none reported.
- Other reported legs (grants, option exercises, tax withholding, gifts, derivative-security transactions, …): 72.
By insider — same window
Open-market purchase/sale legs on non-derivative securities, grouped by the filing's reporting owner(s); joint filings appear once. Dollar totals cover priced legs only (shares × price as filed). Ordered by priced transaction value, largest first.
| Insider | Filings | Purchases (P) | Sales (S) | Other legs |
|---|---|---|---|---|
| Rice William G. — Chair, President & CEO, Director | 1 | — | — | 13 |
| BURGER DENIS R | 1 | — | — | 11 |
| PLATZER ERICH | 1 | — | — | 11 |
| Vincent Mark D. | 1 | — | — | 11 |
| Whitehead Warren | 1 | — | — | 10 |
| Bejar Rafael | 1 | — | — | 7 |
| Payne Fletcher | 1 | — | — | 5 |
| Seizinger Bernd R. | 1 | — | — | 4 |
Recent Form 4 filings — Aptose Biosciences Inc.
| Filed | Form | Insider | Reported transactions | Source |
|---|---|---|---|---|
| 2026-07-02 | 4 | Seizinger Bernd R. | Disposition to issuer (D): 17,000 @ $1.72 · Disposition to issuer (D): 3,333 (derivative) @ $0 · Disposition to issuer (D): 100,000 (derivative) @ $0 · Disposition to issuer (D): 50,000 (derivative) @ $0 | EDGAR |
| 2026-07-01 | 4 | Bejar Rafael | Disposition to issuer (D): 244 @ $1.72 · Disposition to issuer (D): 35,000 (derivative) @ $0 · Disposition to issuer (D): 200,000 (derivative) @ $0 · Disposition to issuer (D): 400,000 (derivative) @ $0 · Disposition to issuer (D): 343,000 (derivative) @ $0 · Disposition to issuer (D): 200,000 (derivative) @ $0 · +1 more | EDGAR |
| 2026-07-01 | 4 | Rice William G. — Chair, President & CEO, Director | Disposition to issuer (D): 613,252 @ $1.72 · Disposition to issuer (D): 70,000 (derivative) @ $0 · Disposition to issuer (D): 50,000 (derivative) @ $0 · Disposition to issuer (D): 400,000 (derivative) @ $0 · Disposition to issuer (D): 600,000 (derivative) @ $0 · Disposition to issuer (D): 700,000 (derivative) @ $0 · +7 more | EDGAR |
| 2026-07-01 | 4 | Whitehead Warren | Disposition to issuer (D): 33 @ $1.72 · Disposition to issuer (D): 3,333 (derivative) @ $0 · Disposition to issuer (D): 100,000 (derivative) @ $0 · Disposition to issuer (D): 50,000 (derivative) @ $0 · Disposition to issuer (D): 50,000 (derivative) @ $0 · Disposition to issuer (D): 50,000 (derivative) @ $0 · +4 more | EDGAR |
| 2026-07-01 | 4 | Vincent Mark D. | Disposition to issuer (D): 14 @ $1.72 · Disposition to issuer (D): 3,333 (derivative) @ $0 · Disposition to issuer (D): 100,000 (derivative) @ $0 · Disposition to issuer (D): 50,000 (derivative) @ $0 · Disposition to issuer (D): 50,000 (derivative) @ $0 · Disposition to issuer (D): 154,000 (derivative) @ $0 · +5 more | EDGAR |
| 2026-07-01 | 4 | Payne Fletcher | Disposition to issuer (D): 222 @ $1.72 · Disposition to issuer (D): 22 @ $1.72 · Disposition to issuer (D): 55,000 (derivative) @ $0 · Disposition to issuer (D): 200,000 (derivative) @ $0 · Disposition to issuer (D): 1,000,000 (derivative) @ $0 | EDGAR |
| 2026-07-01 | 4 | PLATZER ERICH | Disposition to issuer (D): 1,122 @ $1.72 · Disposition to issuer (D): 3,333 (derivative) @ $0 · Disposition to issuer (D): 100,000 (derivative) @ $0 · Disposition to issuer (D): 50,000 (derivative) @ $0 · Disposition to issuer (D): 50,000 (derivative) @ $0 · Disposition to issuer (D): 50,000 (derivative) @ $0 · +5 more | EDGAR |
| 2026-07-01 | 4 | BURGER DENIS R | Disposition to issuer (D): 70 @ $1.72 · Disposition to issuer (D): 3,333 (derivative) @ $0 · Disposition to issuer (D): 100,000 (derivative) @ $0 · Disposition to issuer (D): 50,000 (derivative) @ $0 · Disposition to issuer (D): 50,000 (derivative) @ $0 · Disposition to issuer (D): 50,000 (derivative) @ $0 · +5 more | EDGAR |
| 2024-11-26 | 4 | Rice William G. — Chair, President & CEO, Director | Purchase (P): 100,000 @ $0.20 · Purchase (P): 50,000 (derivative) | EDGAR |
| 2024-05-10 | 4 | LEDRU PHILIPPE | Holdings only — no transactions reported | EDGAR |
| 2024-02-07 | 4 | LEDRU PHILIPPE — Sr VP & Ch Commerical Officer | Grant/award (A): 11,000 (derivative) @ $0 | EDGAR |
| 2024-02-07 | 4 | Bejar Rafael — Sr VP & Chief Medical Officer | Grant/award (A): 35,000 (derivative) @ $0 | EDGAR |
| 2024-02-07 | 4 | Seizinger Bernd R. — Director | Grant/award (A): 3,333 (derivative) @ $0 | EDGAR |
| 2024-02-07 | 4 | Ashe Carol Gail — Director | Grant/award (A): 3,333 (derivative) @ $0 | EDGAR |
| 2024-02-07 | 4 | Rice William G. — Chair, President & CEO, Director | Grant/award (A): 70,000 (derivative) @ $0 | EDGAR |
| 2024-02-07 | 4 | Whitehead Warren — Director | Grant/award (A): 3,333 (derivative) @ $0 | EDGAR |
| 2024-02-07 | 4 | Vincent Mark D. — Director | Grant/award (A): 3,333 (derivative) @ $0 | EDGAR |
| 2024-02-07 | 4 | Payne Fletcher — Sr VP and CFO | Grant/award (A): 55,000 (derivative) @ $0 | EDGAR |
| 2024-02-07 | 4 | PLATZER ERICH — Director | Grant/award (A): 3,333 (derivative) @ $0 | EDGAR |
| 2024-02-07 | 4 | BURGER DENIS R — Director | Grant/award (A): 3,333 (derivative) @ $0 | EDGAR |
Recent 8-K events — Aptose Biosciences Inc.
| Filed | Form | Items reported | Source |
|---|---|---|---|
| 2026-07-01 | 8-K | 7.01 — Regulation FD Disclosure 9.01 — Financial Statements and Exhibits | EDGAR |
| 2026-07-01 | 8-K | 2.01 — Completion of Acquisition or Disposition of Assets 3.03 — Material Modification to Rights of Security Holders 5.01 — Changes in Control of Registrant 5.02 — Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers 8.01 — Other Events 9.01 — Financial Statements and Exhibits | EDGAR |
| 2026-06-15 | 8-K | 7.01 — Regulation FD Disclosure 9.01 — Financial Statements and Exhibits | EDGAR |
| 2026-05-29 | 8-K | 7.01 — Regulation FD Disclosure 9.01 — Financial Statements and Exhibits | EDGAR |
| 2026-05-13 | 8-K | 2.02 — Results of Operations and Financial Condition 9.01 — Financial Statements and Exhibits | EDGAR |
| 2026-04-30 | 8-K | 7.01 — Regulation FD Disclosure 9.01 — Financial Statements and Exhibits | EDGAR |
| 2026-03-31 | 8-K | 7.01 — Regulation FD Disclosure 9.01 — Financial Statements and Exhibits | EDGAR |
| 2026-03-31 | 8-K | 5.07 — Submission of Matters to a Vote of Security Holders | EDGAR |
| 2026-03-23 | 8-K | 7.01 — Regulation FD Disclosure 9.01 — Financial Statements and Exhibits | EDGAR |
| 2026-03-23 | 8-K | 1.01 — Entry into a Material Definitive Agreement 5.02 — Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers 9.01 — Financial Statements and Exhibits | EDGAR |
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