Aptose Biosciences Inc. - Common Shares (APTO) Institutional Ownership

13F Institutional Holders and Ownership History from Q2 2023 to Q1 2025

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

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