Aptose Biosciences Inc.
APTODelisted- Industry
- Biological Products, (No Diagnostic Substances)
- SEC CIK
- 0000882361
Aptose Biosciences Inc. was delisted in 2025; its insiders filed their last Form 4 on Jul 2, 2026; 24 institutions reported holding it in 13F filings for Q4 2024, worth $892.9K in total; no superinvestor held it.
13F holders, Q1 2025
Institutional positions in Aptose Biosciences Inc. as of Mar 31, 2025. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
APTO is no longer listed, and 13F filings after Q4 2024 list far fewer holders. See Q4 2024
- Institutional holders
- 0
- −24 vs. Q4 2024
- Shares held
- 0
- −3.97M (−100.0%) vs. Q4 2024
- Total value
- $0
- −$892.9K (−100.0%) vs. Q4 2024
- New holders
- 0
- 0 more added
- Sold out
- 24
- 0 more reduced
Compare with Q4 2024: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting APTO on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 0 | $0 |
| Q1 2026 | 0 | $0 |
| Q4 2025 | 0 | $0 |
| Q3 2025 | 0 | $0 |
| Q2 2025 | 0 | $0 |
| Q1 2025 | 0 | $0 |
| Q4 2024 | 24 | $892.9K |
| Q3 2024 | 25 | $1.33M |
| Q2 2024 | 23 | $2.11M |
| Q1 2024 | 25 | $1.75M |
| Q4 2023 | 27 | $3.37M |
| Q3 2023 | 26 | $3.05M |
| Q2 2023 | 23 | $4.46M |
| Q1 2023 | 0 | $0 |
| Q4 2022 | 0 | $0 |
| Q3 2022 | 0 | $0 |
| Q2 2022 | 0 | $0 |
| Q1 2022 | 0 | $0 |
| Q4 2021 | 0 | $0 |
| Q3 2021 | 0 | $0 |
| Q2 2021 | 0 | $0 |
| Q1 2021 | 0 | $0 |
Institutions, Q1 2025
Shares, value and share of portfolio for each institution holding Aptose Biosciences Inc.; share changes are against Q4 2024.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Bleichroeder LP | 0 | $0 | 0.00% | −2,500,000−100.0% | Sold out |
| Sigma Planning Corp | 0 | $0 | 0.00% | −703,384−100.0% | Sold out |
| DRW Securities, LLC | 0 | $0 | 0.00% | −592,829−100.0% | Sold out |
| UBS Group AG | 0 | $0 | 0.00% | −57,827−100.0% | Sold out |
| HRT Financial LP | 0 | $0 | 0.00% | −43,112−100.0% | Sold out |
| Annandale Capital, LLC | 0 | $0 | 0.00% | −26,666−100.0% | Sold out |
| Cetera Investment Advisers | 0 | $0 | 0.00% | −19,206−100.0% | Sold out |
| Two Sigma Securities, LLC | 0 | $0 | 0.00% | −11,398−100.0% | Sold out |
| Morgan Stanley | 0 | $0 | 0.00% | −5,501−100.0% | Sold out |
| US Bancorp | 0 | $0 | 0.00% | −2,020−100.0% | Sold out |
| Gleason Group, Inc. | 0 | $0 | 0.00% | −1,216−100.0% | Sold out |
| Newbridge Financial Services Group, Inc. | 0 | $0 | 0.00% | −832−100.0% | Sold out |
| TD Waterhouse Canada Inc. | 0 | $0 | 0.00% | −684−100.0% | Sold out |
| Advisor Group Holdings, Inc. | 0 | $0 | 0.00% | −420−100.0% | Sold out |
| HighMark Wealth Management LLC | 0 | $0 | 0.00% | −300−100.0% | Sold out |
| Northwestern Mutual Wealth Management Co | 0 | $0 | 0.00% | −133−100.0% | Sold out |
| SBI Securities Co., Ltd. | 0 | $0 | 0.00% | −135−100.0% | Sold out |
| Group One Trading, L.P. | 0 | $0 | 0.00% | −115−100.0% | Sold out |
| Federation des caisses Desjardins du Quebec | 0 | $0 | 0.00% | −102−100.0% | Sold out |
| Steward Partners Investment Advisory, LLC | 0 | $0 | 0.00% | −3−100.0% | Sold out |
| Pacific Capital Wealth Advisors, Inc | 0 | $0 | 0.00% | −6−100.0% | Sold out |
| FIL Ltd | 0 | $0 | 0.00% | −1−100.0% | Sold out |
| Citigroup Inc | 0 | $0 | 0.00% | −1−100.0% | Sold out |
| Royal Bank of Canada | 0 | $0 | 0.00% | −674−100.0% | Sold out |