Latest Period
n/a
Security Snapshot
Aptose Biosciences Inc. - Common Shares (APTO) Institutional Ownership
CUSIP: 03835T309
13F Institutional Holders and Ownership History from Q2 2023 to Q1 2025
Institutions Reporting
Shares (Excl. Options)
Price
$0.11
- Type / Class
- Equity / Common Shares
- Symbol
- APTO
- Shares outstanding
- 2,587,950
- Price per share
- $0.11
Reported Shares, Excluding Options vs Price
Reported Value, Excluding Options
Total Investors
Quick Takeaways
- APTO - Aptose Biosciences Inc. - Common Shares is tracked under CUSIP 03835T309.
- Latest finished 13F holder period is not available.
- 2 significant owners is listed from Schedule 13D/13G reporting.
What Changed
- Holder count moved from 20 to 0 between Q4 2024 and Q1 2025.
- Reported value moved from $892,850 to $0.
Why This Matters
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Official SEC Source
Backed by Schedule 13D/13G
Ownership context comes from SEC Form 13F and, when available, Schedule 13D/13G filings.
See Original FilingInvestment Quick Answers
What is CUSIP 03835T309?
CUSIP 03835T309 identifies APTO - Aptose Biosciences Inc. - Common Shares in SEC 13F datasets.
Where can I see the latest institutional holders?
Use the ownership history tables below to review the newest available institutional filing periods.
Continue Investment Research
- Latest 13F filings for new institutional portfolio disclosures.
- Latest Schedule 13D/13G reports for activist and beneficial ownership updates.
- Latest 10-Q/10-K reports to cross-check issuer fundamentals.
- Recent insider transactions for management buying/selling context.
- SEC investors directory and top value investors for manager-level discovery.
- All institutional ownership pages to compare adjacent CUSIP pages.
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP 03835T309:
Significant Owners of Aptose Biosciences Inc. - Common Shares (APTO) based on Schedule 13D/G filings
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| ARMISTICE CAPITAL, LLC | 5% | $112,779 | 1,025,267 | Armistice Capital, LLC | 31 Dec 2024 | |||
| Bleichroeder LP | 1.6% | -78% | $4,583 | -$13,350 | 41,666 | -74% | Bleichroeder LP | 30 Jun 2025 |
Institutional Holders of Aptose Biosciences Inc. - Common Shares (APTO) across Reporting Periods
| Period | Reported Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2025 Q1 | 0 | $0 | -$892,850 | $0.11 | 0 |
| 2024 Q4 | 3,965,886 | $892,850 | -$203,734 | $0.23 | 20 |
| 2024 Q3 | 3,229,387 | $1,326,991 | +$213,806 | $0.41 | 22 |
| 2024 Q2 | 2,708,592 | $2,055,953 | +$1,284,637 | $0.76 | 21 |
| 2024 Q1 | 977,602 | $1,623,107 | -$345,174 | $1.66 | 20 |
| 2023 Q4 | 1,116,098 | $2,836,001 | +$82,831 | $2.54 | 27 |
| 2023 Q3 | 1,075,178 | $3,010,563 | +$253,698 | $2.80 | 24 |
| 2023 Q2 | 951,649 | $4,416,382 | +$4,416,382 | $4.64 | 22 |