// company-profile
Aptose Biosciences Inc.
APTOFExchangeOTCSectorBiological Products, (No Diagnostic Substances)Inc.A6Filings13Insiders10
// api This Aptose Biosciences Inc. insider-trading data is served live by the Form4API insider trading API. Get the same data via API.
// activity-summary
No insider transactions in the last 30 days.
No insider activity recorded for APTOF in the last 90 days.
Institutional Ownership
Top 13F-HR holders of Aptose Biosciences Inc. as of 2026-03-31
Total reported AUM
$39,965
QoQ change
—
Reporting period
2026-03-31
#1
DRW Securities, LLC
CIK 1481986
$32,921
20K shares
#2
Gleason Group, Inc.
CIK 1822632
$7,024
4K shares
#3
Farther Finance Advisors, LLC
CIK 1992825
$17
10 shares
Data source: SEC Form 13F-HR filings. Joined with insider activity above — see who's loading up institutionally while insiders are trading. Full 13F-HR API →
Insider Transactions
Sourced from SEC EDGAR Form 4 filings. Updated hourly.
| Date | Insider | Company | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Nov 25, 2024 | Rice William G. | APTOF | Purchase | 100,000 | $0.20 | $20K |
| Nov 25, 2024 | Rice William G. | APTOF | Purchase | 50,000 | — | — |
| Feb 5, 2024 | BURGER DENIS R | APTOF | Award | 3,333 | $0.00 | $0K |
| Feb 5, 2024 | Ashe Carol Gail | APTOF | Award | 3,333 | $0.00 | $0K |
| Feb 5, 2024 | Vincent Mark D. | APTOF | Award | 3,333 | $0.00 | $0K |
8 more transactions hidden
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