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Aptose Biosciences Inc. (APTO) Stock Price & Insider Trading
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Aptose Biosciences Inc. (APTO)
Latest APTO Insider Trades
About Aptose Biosciences Inc. (APTO) Aptose Biosciences Inc. files with the SEC under CIK 0000882361. The registration was withdrawn on 23 March 2026, so the planned offering is not going ahead in its filed form.
SEC filings for APTO on EDGAR
90-Day SEC Filing Activity Form 4 transaction type Transactions Shares Total value Derivative transaction 72 11,134,478
Dollar totals are shown for open-market purchases and sales only. Grants, option exercises, gifts and tax withholding are reported by share count because they are not trades at a market price.
APTO Insider Transactions (Form 4) 74 9 Form 4 filings on record, the earliest from Nov 26, 2024, newest first.
Date Insider Transaction Security Shares Price Value Jun 30, 2026 BS Bernd R. Seizinger Derivative Common Shares 17,000 $1.72
Recent APTO Form 8-K Filings 5
APTO Insider Trading - FAQ
What is the latest insider trade for APTO? Aptose Biosciences Inc. (APTO) had 8 insider filings in the last 90 days, with the most recent on 2026-07-02. The full record for APTO runs to 9 Form 4 filings, the earliest from 2024-11-26. InsiderAlpha tracks every Form 4, Form 144, and 8-K filing in real time.
How many insiders are buying APTO stock? No insider purchases of APTO were filed in the last 90 days. 2 purchases are on record for this company.
How many insiders are selling APTO stock? No insider sales of APTO were filed in the last 90 days.
Where can I see APTO SEC filings (Form 4, 10-K, 10-Q, 8-K)? This page tracks APTO Form 4 insider transactions, Form 144 sale notices, and 8-K material event disclosures in one timeline. Annual 10-K and quarterly 10-Q reports live on the company's SEC EDGAR page.
How can I follow APTO insider buys? Create a free InsiderAlpha account and press Watch on this page to add APTO to your watchlist. A free account also opens the full scored daily plan with every past day and 3 months of price history. No card is required. Sign up at https://insideralpha.ai/register.
More Companies with Insider Activity Every Form 4 below links to the original document on SEC EDGAR, so the numbers on this page can be checked against the filing they came from.
What is SEC Form 4? The filing insiders must submit within two business days of a trade, and how to read its transaction codes. Track APTO insider activity as it files Real-time Form 4 alerts, AI-scored daily trade ideas and 10b5-1 plan flags.
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$29K
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Most-Active APTO Insiders - Last 90 Days 8 Jun 30, 2026 WW Warren Whitehead Derivative Director Stock Option (Right to Buy) 3,333 $0.00 -
Jun 30, 2026 WW Warren Whitehead Derivative Director Stock Option (Right to Buy) 50,000 $0.00 -
Jun 30, 2026 WW Warren Whitehead Derivative Stock Options (Right to Buy) 40,000 $0.00 -
Jun 30, 2026 WW Warren Whitehead Derivative Director Stock Option (Right to Buy) 53,000 $0.00 -
Jun 30, 2026 MV Mark D. Vincent Derivative Director Stock Option (Right to Buy) 3,333 $0.00 -
Jun 30, 2026 MV Mark D. Vincent Derivative Director Stock Option (Right to Buy) 100,000 $0.00 -
Jun 30, 2026 MV Mark D. Vincent Derivative Director Stock Option (Right to Buy) 50,000 $0.00 -
Jun 30, 2026 MV Mark D. Vincent Derivative Director Stock Option (Right to Buy) 5,000 $0.00 -
Jun 30, 2026 MV Mark D. Vincent Derivative Director Stock Option (Right to Buy) 60,000 $0.00 -
Jun 30, 2026 MV Mark D. Vincent Derivative Director Stock Option (Right to Buy) 50,000 $0.00 -
Jun 30, 2026 MV Mark D. Vincent Derivative Stock Options (Right to Buy) 40,000 $0.00 -
Jun 30, 2026 MV Mark D. Vincent Derivative Director Stock Option (Right to Buy) 10,000 $0.00 -
Jun 30, 2026 WR William G. Rice - Officer Derivative Common Shares 613,252 $1.72 $1.05M
Jun 30, 2026 WR William G. Rice - Officer Derivative Employee Stock Option ("Right to Buy") 70,000 $0.00 -
Jun 30, 2026 WR William G. Rice - Officer Derivative Employee Stock Option ("Right to Buy") 400,000 $0.00 -
Jun 30, 2026 WR William G. Rice - Officer Derivative Performance Stock Options 600,000 $0.00 -
Jun 30, 2026 WR William G. Rice - Officer Derivative Employee Option Grant 700,000 $0.00 -
Jun 30, 2026 WR William G. Rice - Officer Derivative Employee Stock Option ("Right to Buy") 343,000 $0.00 -
Jun 30, 2026 WR William G. Rice - Officer Derivative Employee Option Grant 2,000,000 $0.00 -
Jun 30, 2026 WR William G. Rice - Officer Derivative Stock Options (Right to Buy) 400,000 $0.00 -
Jun 30, 2026 WR William G. Rice - Officer Derivative Employee Stock Option (Right to Buy) 100,000 $0.00 -
Jun 30, 2026 WR William G. Rice - Officer Derivative Employee Stock Option (Right to Buy) 50,000 $0.00 -
Jun 30, 2026 WR William G. Rice - Officer Derivative Employee Stock Option (Right to Buy) 300,000 $0.00 -
Jun 30, 2026 WR William G. Rice - Officer Derivative Common Shares 400,000 $0.00 -
Jun 30, 2026 EP Erich Platzer Derivative Director Stock Option (Right to Buy) 3,333 $0.00 -
Jun 30, 2026 EP Erich Platzer Derivative Director Stock Option (Right to Buy) 100,000 $0.00 -
Jun 30, 2026 EP Erich Platzer Derivative Director Stock Option (Right to Buy) 50,000 $0.00 -
Jun 30, 2026 EP Erich Platzer Derivative Director Stock Option (Right to Buy) 50,000 $0.00 -
Jun 30, 2026 EP Erich Platzer Derivative Director Option Grant 50,000 $0.00 -
Jun 30, 2026 EP Erich Platzer Derivative Director Option Grant 135,000 $0.00 -
Jun 30, 2026 EP Erich Platzer Derivative Stock Options (Right to Buy) 40,000 $0.00 -
Jun 30, 2026 EP Erich Platzer Derivative Director Stock Option 10,000 $0.00 -
Jun 30, 2026 EP Erich Platzer Derivative Director Stock Option (Right to Buy) 5,000 $0.00 -
Jun 30, 2026 EP Erich Platzer Derivative Director Stock Option (Right to Buy) 60,000 $0.00 -
Jun 30, 2026 FP Fletcher Payne Derivative Employee Stock Option (Right to Buy) 55,000 $0.00 -
Jun 30, 2026 FP Fletcher Payne Derivative Employee Stock Option (Right to Buy) 200,000 $0.00 -
Jun 30, 2026 FP Fletcher Payne Derivative Common Stock (Option) 1,000,000 $0.00 -
Jun 30, 2026 DB Denis R. Burger Derivative Director Stock Option (Right to Buy) 3,333 $0.00 -
Jun 30, 2026 DB Denis R. Burger Derivative Director Stock Option (Right to Buy) 100,000 $0.00 -
Jun 30, 2026 DB Denis R. Burger Derivative Director Stock Option (Right to Buy) 50,000 $0.00 -
Jun 30, 2026 DB Denis R. Burger Derivative Director Stock Option (Right to Buy) 50,000 $0.00 -
Jun 30, 2026 DB Denis R. Burger Derivative Director Stock Option (Right to Buy) 50,000 $0.00 -
Jun 30, 2026 DB Denis R. Burger Derivative Director Stock Option (Right to Buy) 160,334 $0.00 -
Jun 30, 2026 DB Denis R. Burger Derivative Stock Options (Right to Buy) 40,000 $0.00 -
Jun 30, 2026 DB Denis R. Burger Derivative Director Stock Option (Right to Buy) 5,000 $0.00 -
Jun 30, 2026 DB Denis R. Burger Derivative Director Stock Option (Right to Buy) 60,000 $0.00 -
Jun 30, 2026 DB Denis R. Burger Derivative Director Stock Option (Right to Buy) 10,000 $0.00 -
Jun 30, 2026 RB Rafael Bejar Derivative Common Shares 244 $1.72 $420
Jun 30, 2026 RB Rafael Bejar Derivative Employee Stock Option (Right to Buy) 35,000 $0.00 -
Jun 30, 2026 RB Rafael Bejar Derivative Employee Stock Option 200,000 $0.00 -
Jun 30, 2026 RB Rafael Bejar Derivative Performance Stock Option 400,000 $0.00 -
Jun 30, 2026 RB Rafael Bejar Derivative Employee Stock Option (Right to Buy) 343,000 $0.00 -
Jun 30, 2026 RB Rafael Bejar Derivative Employee Option Grant 200,000 $0.00 -
Jun 30, 2026 RB Rafael Bejar Derivative Employee Stock Option (Right to Buy) 400,000 $0.00 -
Nov 25, 2024 WR William G. Rice - Officer Open-market purchase Common Shares 100,000 $6.00 $20K
Nov 25, 2024 WR William G. Rice - Officer Open-market purchase Warrants 50,000 - -
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