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
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- Security type / class
- Equity / Common Shares
- Symbol
- APTO
- Shares outstanding
- 2,587,950
- SEC-reported price per share
- $0.11
13F Shares, Excluding Options vs Price
13F Value, Excluding Options
Total Investors
Key facts
- 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.
Change
- Holder count moved from 20 to 0 between Q4 2024 and Q1 2025.
- SEC-reported value moved from $892,850 to $0.
Research use
- 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.
Evidence
Source: SEC Schedule 13D/G
Open SEC evidence
Ownership context comes from Schedule 13D/G and available holder history for this CUSIP.
Security key
03835T309
Latest holder period
n/a
13F holders
13D/G owners
2
CIK / CUSIP context first
APTO full holder history
Aptose Biosciences Inc. SEC filings
Aptose Biosciences Inc. company facts
Aptose Biosciences Inc. insider transactions
Broader feeds
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP 03835T309:
13D/G owners
Significant owners
Large-stake holder rows connected to Schedule 13D/G evidence.
Rows
2
Security
APTO
| 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 |
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
8
Latest
n/a
Rows shown
1-8 of 8
| Period | 13F 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 |