Security key
03835T309
Aptose Biosciences Inc. - Common Shares (APTO)
CUSIP: 03835T309
Q4 2023 13F Holders as of 31 Dec 2023
- Security type / class
- Equity / Common Shares
- Total 13F shares
- 1,116,098
- Total 13F value
- $2,836,001
- Share change
- +33,725
- SEC-reported price per share
- $2.54
- Number of holders
- 27
- Value change
- +$82,831
- Number of buys
- 11
- Number of sells
- 7
- Shares outstanding
- 2,587,950
Holder snapshot
6 signals
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q4 2023
Institutions
27
Top holders
10
APTO full security history
Ownership snapshot
Full 13F holder table
Aptose Biosciences Inc. SEC filings
Aptose Biosciences Inc. company facts
Broader feeds
Ownership snapshot
Top reported holders of APTO - Aptose Biosciences Inc. - Common Shares (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
Donald R. Wilson Jr.
Disclosed value leader
Donald R. Wilson Jr.
Comparable rows
0/15
Latest evidence
30 Sep 2023
3/4/5
13F
Highest disclosed value: $12,885,141
15 rows are not safely comparable across share classes.
Showing 1-6 of 15 holder rows.
Quick read
Donald R. Wilson Jr. has the largest disclosed position value at $12.89M.
0 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens Donald R. Wilson Jr.'s linked filing trail.
Disclosed position value
Top 5
Donald R. Wilson Jr.
$12.89M
DRW Securities, LLC
$1.66M
Sigma Planning Corp
$408.2K
Nantahala Capital Management, LLC
$382.2K
Carlson Capital, L.P.
$298.7K
Value bars compare disclosed positions; verify each figure against the linked filing evidence.
Detailed SEC evidence table Showing 1-6 of 15 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Donald R. Wilson Jr. |
3/4/5
10%+ Owner
|
—
denominator unverified
|
$12,885,141
8,892,437 shares
|
— | 03 Aug 2021 |
| DRW Securities, LLC |
13F
Company
|
—
denominator unverified
|
$1,660,000
592,829 shares
|
— | 30 Sep 2023 |
| Sigma Planning Corp |
13F
Company
|
—
denominator unverified
|
$408,201
145,786 shares
|
— | 30 Sep 2023 |
| Nantahala Capital Management, LLC |
13F
Company
|
—
denominator unverified
|
$382,152
136,483 shares
|
— | 30 Sep 2023 |
| Carlson Capital, L.P. |
13F
Company
|
—
denominator unverified
|
$298,665
106,666 shares
|
— | 30 Sep 2023 |
| Annandale Capital, LLC |
13F
Company
|
—
denominator unverified
|
$209,000
74,666 shares
|
— | 30 Sep 2023 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
13F holder rows
Institutional holders as of Q4 2023
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
27
Shares
1,116,098
Rows available
27
| Investor | Option | Weight % | Change % | SEC-reported value | * Price | Shares | Share Change | Activity | Report Period |
|---|
* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.
Compare Q4 2023 vs Q3 2023 Across Filers
Q3 2023 holders
24
Q4 2023 holders
27
Holder diff
3
| Investor | Q3 2023 Shares | Q4 2023 Shares | Share Diff | Share Chg % | Q3 2023 value | Q4 2023 value | Value change | Value Chg % |
|---|