Company profile
Aptose Biosciences Inc. Insider Trading
APTOFEvery SEC Form 4 insider trading filing for Aptose Biosciences Inc. (APTOF) since April 2023: open-market buys and sells by directors and officers, option exercises, and cluster activity, updated as each filing is reported to the SEC. Why 2023?
- Exchange
- OTC
- Sector
- Biological Products, (No Diagnostic Substances)
- CIK
- 0000882361
- Filings
- 21
- Insiders
- 10
- Last filing
- 2026-06-30
Activity summary
No insider transactions in the last 30 days. The most recent was on June 30, 2026, when Rafael Bejar sold 244 shares. 21 filings from 10 insiders are on record below.
Three year balance
Buy and sell value by quarter, Q3 23 to Q2 26. Aptose Biosciences Inc. insiders are net sellers across the period shown.
Bars below the rule are sales, above are purchases. Largest quarter on the chart is $1.1M.
90 day insight
Over the last 90 days, Aptose Biosciences Inc. insiders sold $1.1M across 50 transactions with no open-market purchases.
- Most active insider: William G. Rice with 13 transactions totaling $1.1M.
- Largest single sale: $1.1M by William G. Rice on Jun 30, 2026.
Activity skews bearish: sales outpace buys.
Insider Transactions
Sourced from SEC EDGAR Form 4 filings. Updated hourly.
| Date | Insider | Company | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Jun 30, 2026 | Rafael Bejar | APTOF | Disposition | 244 | $1.72 | $420 |
| Jun 30, 2026 | Rafael Bejar | APTOF | Disposition | 35,000 | — | — |
| Jun 30, 2026 | Rafael Bejar | APTOF | Disposition | 200,000 | — | — |
| Jun 30, 2026 | Rafael Bejar | APTOF | Disposition | 400,000 | — | — |
| Jun 30, 2026 | Rafael Bejar | APTOF | Disposition | 343,000 | — | — |
45 more transactions hidden
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By total value filed.
Institutional Ownership
Top 13F-HR holders of Aptose Biosciences Inc. as of 2026-06-30
Data source: quarterly 13F-HR filings: institutional holders report positions within 45 days of quarter end. Joined with insider activity above: see who's loading up institutionally while insiders are trading. Full 13F-HR API →