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Aptose Biosciences Inc. SEC Filings

Filed On Filing
02 Jul 2026 Form 4: Seizinger Bernd R., FORMER DIRECTOR

Returned 17,000 shares to the issuer ($29.2K) · Disposed of 3,333 Director Stock Option (Right to Buy) (Disposition to Issuer) · Disposed of 150,000 Stock Option (right to buy) (Disposition to Issuer)

01 Jul 2026 Form 4: Whitehead Warren, FORMER DIRECTOR

Returned 33 shares to the issuer ($56.8) · Disposed of 106,333 Director Stock Option (Right to Buy) (Disposition to Issuer) · Disposed of 402,500 Director Option Grant (Disposition to Issuer) · 1 more

01 Jul 2026 Form 4: Vincent Mark D., FORMER DIRECTOR

Returned 14 shares to the issuer ($24.1) · Disposed of 278,333 Director Stock Option (Right to Buy) (Disposition to Issuer) · Disposed of 204,000 Director Option Grant (Disposition to Issuer) · 1 more

01 Jul 2026 Form 4: Rice William G., Director

Returned 613,252 shares to the issuer ($1.05M) · Disposed of 813,000 Employee Stock Option ("Right to Buy") (Disposition to Issuer) · Disposed of 50,000 Warrants (Disposition to Issuer) · 5 more

01 Jul 2026 Form 4: Platzer Erich, FORMER DIRECTOR

Returned 1,122 shares to the issuer ($1.93K) · Disposed of 268,333 Director Stock Option (Right to Buy) (Disposition to Issuer) · Disposed of 185,000 Director Option Grant (Disposition to Issuer) · 2 more

01 Jul 2026 Form 4: Payne Fletcher, FORMER SVP AND CFO

Returned 244 shares to the issuer ($420) · Disposed of 255,000 Employee Stock Option (Right to Buy) (Disposition to Issuer) · Disposed of 1,000,000 Common Stock (Option) (Disposition to Issuer)

01 Jul 2026 Form 4: Burger Denis R, FORMER DIRECTOR

Returned 70 shares to the issuer ($120) · Disposed of 488,667 Director Stock Option (Right to Buy) (Disposition to Issuer) · Disposed of 40,000 Stock Options (Right to Buy) (Disposition to Issuer)

01 Jul 2026 Form 4: Bejar Rafael, Former SVP&Ch Medical Officer

Returned 244 shares to the issuer ($420) · Disposed of 778,000 Employee Stock Option (Right to Buy) (Disposition to Issuer) · Disposed of 200,000 Employee Stock Option (Disposition to Issuer) · 2 more

01 Jul 2026 15-12G
01 Jul 2026 SC 13E3/A
01 Jul 2026 8-K: Completion of Acquisition or Disposition of Assets; Material Modification to Rights of Security Holders +3 more
01 Jul 2026 8-K: Regulation FD Disclosure
15 Jun 2026 8-K: Regulation FD Disclosure
29 May 2026 8-K: Regulation FD Disclosure
13 May 2026 10-Q
13 May 2026 8-K: Results of Operations and Financial Condition
30 Apr 2026 8-K: Regulation FD Disclosure
01 Apr 2026 UPLOAD
01 Apr 2026 SC 13E3/A
31 Mar 2026 10-K

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