Aptose Biosciences Inc. - APTOF
Detailed investor-level table based on 13F positions.
Early Q1 2026 data: only 1 institutional holders reported so far. The full shareholder list will grow as more funds file with the SEC.
Methodology:
Market value and % of portfolio use SEC reported VALUE ($000).
For PUT/CALL positions this reflects reported underlying exposure, not premium cash paid/received.
Details.
Rows: 0
| Investor | History | Status | Shares held | Market value ($000) | % of portfolio | Previous % | Rank | Change in shares | % change in shares | Source | Date reported |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Sigma Planning Corp | History | Reduced | 17,389 | 54 | 0.0% | 0.0% | 1 | -685,995 | -97.53% | Q1 2025 | May 02, 2025 |
| CITADEL ADVISORS LLC | History | New | 12,007 | 38 | 0.0% | — | 2 | +12,007 | New | Q1 2025 | May 15, 2025 |
| NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO | History | Added to | 2,060 | 6 | 0.0% | — | 3 | +1,927 | 1448.87% | Q1 2025 | May 14, 2025 |
| ROYAL BANK OF CANADA | History | Added to | 1,351 | 4 | 0.0% | — | 4 | +677 | 100.45% | Q1 2025 | Nov 21, 2025 |
| DRW Securities, LLC | History | Closed out | 0 | 0 | — | 0.0% | — | -592,829 | -100.0% | Q4 2024 | Feb 13, 2025 |
| UBS Group AG | History | Closed out | 0 | 0 | — | 0.0% | — | -57,827 | -100.0% | Q4 2024 | Feb 14, 2025 |
| Cetera Investment Advisers | History | Closed out | 0 | 0 | — | 0.0% | — | -19,206 | -100.0% | Q4 2024 | Feb 14, 2025 |
| MORGAN STANLEY | History | Reduced | 101 | 0 | — | 0.0% | — | -5,400 | -98.16% | Q1 2025 | May 15, 2025 |
| US BANCORP \DE\ | History | Closed out | 0 | 0 | — | — | — | -2,020 | -100.0% | Q4 2024 | Feb 05, 2025 |
| TD Waterhouse Canada Inc. | History | Reduced | 22 | 0 | — | — | — | -662 | -96.78% | Q1 2025 | May 09, 2025 |
| OSAIC HOLDINGS, INC. | History | Closed out | 0 | 0 | — | — | — | -420 | -100.0% | Q4 2024 | Jun 06, 2025 |
| SBI Securities Co., Ltd. | History | Reduced | 4 | 0 | — | — | — | -131 | -97.04% | Q1 2025 | May 02, 2025 |
| GROUP ONE TRADING LLC | History | Reduced | 3 | 0 | — | — | — | -112 | -97.39% | Q1 2025 | May 14, 2025 |
| NATIONAL BANK OF CANADA /FI/ | History | New | 93 | 0 | — | — | — | +93 | New | Q1 2025 | May 12, 2025 |
| JPMORGAN CHASE & CO | History | New | 36 | 0 | — | — | — | +36 | New | Q1 2025 | May 12, 2025 |
| DANSKE BANK A/S | History | New | 4 | 0 | — | — | — | +4 | New | Q1 2025 | Dec 18, 2025 |
| Steward Partners Investment Advisory, LLC | History | Closed out | 0 | 0 | — | — | — | -3 | -100.0% | Q4 2024 | Feb 06, 2025 |
| Federation des caisses Desjardins du Quebec | History | Added to | 103 | 0 | — | — | — | +1 | 0.98% | Q1 2025 | May 15, 2025 |
| FIL Ltd | History | Closed out | 0 | 0 | — | — | — | -1 | -100.0% | Q4 2024 | Feb 13, 2025 |
| CITIGROUP INC | History | Closed out | 0 | 0 | — | — | — | -1 | -100.0% | Q4 2024 | Feb 12, 2025 |