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APTO insider filings

Aptose Biosciences Inc. — 21 most recent insider filings (SEC Forms 3/4/5) from EDGAR, normalized by FilingPulse. Latest filing: 2026-07-02. Screen APTO transaction legs live →

Insider transaction summary — last 90 days

No insider filings (Forms 3/4/5) for APTO between 2026-07-10 and 2026-10-08. The table below lists the most recent filings on record.

Recent insider filings — Aptose Biosciences Inc.

FiledFormInsiderReported transactionsSource
2026-07-024Seizinger 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) @ $0EDGAR
2026-07-014Bejar RafaelDisposition 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 moreEDGAR
2026-07-014Rice William G. — Chair, President & CEO, DirectorDisposition 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 moreEDGAR
2026-07-014Whitehead WarrenDisposition 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 moreEDGAR
2026-07-014Vincent 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 moreEDGAR
2026-07-014Payne FletcherDisposition 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) @ $0EDGAR
2026-07-014PLATZER ERICHDisposition 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 moreEDGAR
2026-07-014BURGER DENIS RDisposition 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 moreEDGAR
2024-11-264Rice William G. — Chair, President & CEO, DirectorPurchase (P): 100,000 @ $0.20 · Purchase (P): 50,000 (derivative)EDGAR
2024-05-104LEDRU PHILIPPEHoldings only — no transactions reportedEDGAR
2024-02-074LEDRU PHILIPPE — Sr VP & Ch Commerical OfficerGrant/award (A): 11,000 (derivative) @ $0EDGAR
2024-02-074Bejar Rafael — Sr VP & Chief Medical OfficerGrant/award (A): 35,000 (derivative) @ $0EDGAR
2024-02-074Seizinger Bernd R. — DirectorGrant/award (A): 3,333 (derivative) @ $0EDGAR
2024-02-074Ashe Carol Gail — DirectorGrant/award (A): 3,333 (derivative) @ $0EDGAR
2024-02-074Rice William G. — Chair, President & CEO, DirectorGrant/award (A): 70,000 (derivative) @ $0EDGAR
2024-02-074Whitehead Warren — DirectorGrant/award (A): 3,333 (derivative) @ $0EDGAR
2024-02-074Vincent Mark D. — DirectorGrant/award (A): 3,333 (derivative) @ $0EDGAR
2024-02-074Payne Fletcher — Sr VP and CFOGrant/award (A): 55,000 (derivative) @ $0EDGAR
2024-02-074PLATZER ERICH — DirectorGrant/award (A): 3,333 (derivative) @ $0EDGAR
2024-02-074BURGER DENIS R — DirectorGrant/award (A): 3,333 (derivative) @ $0EDGAR
2023-09-254Seizinger Bernd R. — DirectorPurchase (P): 17,000 @ $3.14EDGAR

Recent 8-K events — Aptose Biosciences Inc.

FiledFormItems reportedSource
2026-07-018-K7.01 — Regulation FD Disclosure
9.01 — Financial Statements and Exhibits		EDGAR
2026-07-018-K2.01 — 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
2026-06-158-K7.01 — Regulation FD Disclosure
9.01 — Financial Statements and Exhibits		EDGAR
2026-05-298-K7.01 — Regulation FD Disclosure
9.01 — Financial Statements and Exhibits		EDGAR
2026-05-138-K2.02 — Results of Operations and Financial Condition
9.01 — Financial Statements and Exhibits		EDGAR
2026-04-308-K7.01 — Regulation FD Disclosure
9.01 — Financial Statements and Exhibits		EDGAR
2026-03-318-K7.01 — Regulation FD Disclosure
9.01 — Financial Statements and Exhibits		EDGAR
2026-03-318-K5.07 — Submission of Matters to a Vote of Security HoldersEDGAR
2026-03-238-K7.01 — Regulation FD Disclosure
9.01 — Financial Statements and Exhibits		EDGAR
2026-03-238-K1.01 — 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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