Aptose Biosciences Inc. (APTO) has 15 known insider and institutional holders on record. The largest holder is Marango Jotin with 600,000 shares. Other notable holders include Hanmi Pharmaceutical Co., Ltd. and Chow Gregory K..
APTO Insider Ownership
Top Holder
Marango Jotin
600,000 shares
Buys (12 mo)
0
$0.00 value
Sells (12 mo)
0
$0.00 value
Top Insider Holders
| # |
Name |
Role |
Shares Owned |
Last Filed |
Relative Size |
| 1 |
Marango Jotin |
Senior VP, CFO, and Cbo |
600,000 |
2022-01-20 |
|
| 2 |
Hanmi Pharmaceutical Co., Ltd. |
10 Percent Owner |
508,710 |
2025-03-20 |
|
| 3 |
Chow Gregory K. |
Executive VP & CFO |
343,000 |
2021-01-06 |
|
| 4 |
Payne Fletcher |
Sr VP and CFO |
55,000 |
2024-02-07 |
|
| 5 |
Loewy Caroline M |
Director |
50,000 |
2022-01-20 |
|
| 6 |
Rice William G. |
Chair, President & CEO |
50,000 |
2024-11-26 |
|
| 7 |
Bejar Rafael |
Sr VP & Chief Medical Officer |
35,000 |
2024-02-07 |
|
| 8 |
Ledru Philippe |
Sr VP & Ch Commerical Officer |
11,000 |
2024-02-07 |
|
| 9 |
Wilson Donald R. Jr. |
10 Percent Owner |
4,162 |
2021-08-05 |
|
| 10 |
Platzer Erich |
Director |
3,333 |
2024-02-07 |
|
| 11 |
Seizinger Bernd R. |
Director |
3,333 |
2024-02-07 |
|
| 12 |
Ashe Carol Gail |
Director |
3,333 |
2024-02-07 |
|
| 13 |
Whitehead Warren |
Director |
3,333 |
2024-02-07 |
|
| 14 |
Burger Denis R |
Director |
3,333 |
2024-02-07 |
|
| 15 |
Vincent Mark D. |
Director |
3,333 |
2024-02-07 |
|
No ownership data available for APTO.
