Aptose BiosciencesAPTOF
13F holders, Q1 2025 (March 31)16holders
1famous investor
$3.15avg. 13F price*
At the end of Q1 2025, 16 institutions reported holding Aptose Biosciences Inc. (APTOF) in their 13F filings. The largest holders were Bleichroeder LP ($382K), Sigma Planning Corp ($55K) and Citadel Advisors ($38K). One famous investor held it Ken Griffin (0.0% of Citadel Advisors's portfolio).
- Company
- Aptose Biosciences Inc.
- CUSIP
- 03835T408
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q1 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 4 | $38K |
| Exits | 0 | $0 |
Ownership 16 holders
| Bleichroeder LP | 0.10% | Add +53.1% | 121,366 | $382K |
| Sigma Planning Corp | 0.00% | Reduce -22.0% | 17,389 | $55K |
| Citadel Advisors | 0.00% | New | 12,007 | $38K |
| Northwestern Mutual Wealth Management Co. | 0.00% | Add +48749.7% | 2,060 | $6K |
| Royal Bank of Canada | 0.00% | Add +6221.8% | 1,351 | $4K |
| Federation des caisses Desjardins du Quebec | 0.00% | Add +3084.8% | 103 | $319 |
| Morgan Stanley | 0.00% | Reduce -42.1% | 101 | $318 |
| National Bank of Canada | 0.00% | New | 93 | $293 |
| Gleason Group, Inc. | 0.00% | Add +3.8% | 40 | $126 |
| NFSG Corp | 0.00% | Reduce -1.4% | 26 | $82 |
| TD Waterhouse Canada Inc. | 0.00% | Add +1.4% | 22 | $35 |
| HighMark Wealth Management LLC | 0.00% | Reduce -5.4% | 9 | $28 |
| Danske Bank A/S | 0.00% | New | 4 | $13 |
| SBI Securities Co., Ltd. | 0.00% | Reduce -6.5% | 4 | $13 |
| Group One Trading LLC | 0.00% | Reduce -17.7% | 3 | $9 |
| JPMorgan Chase & Co. | 0.00% | New | 36 | $8 |
"% of holder's portfolio" is APTOF's weight in each manager's 13F, not the share of Aptose Biosciences Inc. the manager owns.