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More Details of Aptose Biosciences Inc Company

Aptose Biosciences Inc. is a clinical-stage biotechnology company engaged in developing precision medicines addressing unmet medical needs in oncology, with an initial focus on hematology. The Company's small molecule cancer therapeutics pipeline includes products designed to provide single agent efficacy and to enhance the efficacy of other anti-cancer therapies and regimens without overlapping toxicities. Its lead clinical-stage compound Tuspetinib (TUS), is an oral kinase inhibitor that has demonstrated activity as a monotherapy and in combination therapy in patients with relapsed or refractory acute myeloid leukemia (AML) and is being developed as a frontline triplet therapy in newly diagnosed AML. Its Luxeptinib (LUX) is being developed for the treatment of patients with certain B-cell malignancies, including chronic lymphocytic leukemia (CLL), small lymphocytic lymphoma (SLL), and certain non-Hodgkin’s lymphomas (NHL) who are resistant or intolerant to conventional treatments.

undefined Info

Ticker SymbolAPTO
Company nameAptose Biosciences Inc
IPO dateJun 04, 1993
CEODr. William Glenn Rice, Ph.D.
Number of employees35
Security typeOrdinary Share
Fiscal year-endJun 04
Address251 Consumers Rd Suite 1105
CityNORTH YORK
Stock exchangeNASDAQ Capital Market Consolidated
CountryCanada
Postal codeM2J 4R3
Phone16474799828
Websitehttps://aptose.com/
Ticker SymbolAPTO
IPO dateJun 04, 1993
CEODr. William Glenn Rice, Ph.D.

Company Executives of undefined

Name
Name/Position
Position
Shareholding
Change
Dr. William Glenn Rice, Ph.D.
Dr. William Glenn Rice, Ph.D.
Chairman of the Board, President, Chief Executive Officer
Chairman of the Board, President, Chief Executive Officer
5.78K
-5.86%
Dr. Rafael Bejar, M.D., Ph.D
Dr. Rafael Bejar, M.D., Ph.D
Senior Vice President, Chief Medical Officer
Senior Vice President, Chief Medical Officer
244.00
--
Dr. Denis R. Burger, Ph.D.
Dr. Denis R. Burger, Ph.D.
Lead Independent Director
Lead Independent Director
48.00
--
Mr. Warren Whitehead, CPA
Mr. Warren Whitehead, CPA
Independent Director
Independent Director
33.00
--
Dr. Mark D. Vincent, M.D.
Dr. Mark D. Vincent, M.D.
Independent Director
Independent Director
14.00
--
Dr. Bernd R. Seizinger, M.D., Ph.D.
Dr. Bernd R. Seizinger, M.D., Ph.D.
Independent Director
Independent Director
--
--
Dr. Erich M. O. Platzer, M.D., Ph.D.
Dr. Erich M. O. Platzer, M.D., Ph.D.
Independent Director
Independent Director
--
--
Mr. Fletcher Payne
Mr. Fletcher Payne
Chief Financial Officer, Senior Vice President, Company Secretary, Chief Business Officer
Chief Financial Officer, Senior Vice President, Company Secretary, Chief Business Officer
--
--
Name
Name/Position
Position
Shareholding
Change
Dr. William Glenn Rice, Ph.D.
Dr. William Glenn Rice, Ph.D.
Chairman of the Board, President, Chief Executive Officer
Chairman of the Board, President, Chief Executive Officer
5.78K
-5.86%
Dr. Rafael Bejar, M.D., Ph.D
Dr. Rafael Bejar, M.D., Ph.D
Senior Vice President, Chief Medical Officer
Senior Vice President, Chief Medical Officer
244.00
--
Dr. Denis R. Burger, Ph.D.
Dr. Denis R. Burger, Ph.D.
Lead Independent Director
Lead Independent Director
48.00
--
Mr. Warren Whitehead, CPA
Mr. Warren Whitehead, CPA
Independent Director
Independent Director
33.00
--
Dr. Mark D. Vincent, M.D.
Dr. Mark D. Vincent, M.D.
Independent Director
Independent Director
14.00
--
Dr. Bernd R. Seizinger, M.D., Ph.D.
Dr. Bernd R. Seizinger, M.D., Ph.D.
Independent Director
Independent Director
--
--

Revenue Breakdown

No Data
No Data
By Business
By Region
No Data

Shareholding Stats

Updated: Sat, Aug 23
Updated: Sat, Aug 23
Shareholders
Shareholder Types
Shareholders
Shareholders
Proportion
Hanmi Science Co Ltd
19.93%
DRW Securities, LLC
0.77%
Rice (William Glenn)
0.23%
The Gleason Group Inc.
0.16%
RBC Dominion Securities, Inc.
0.05%
Other
78.85%
Shareholders
Shareholders
Proportion
Hanmi Science Co Ltd
19.93%
DRW Securities, LLC
0.77%
Rice (William Glenn)
0.23%
The Gleason Group Inc.
0.16%
RBC Dominion Securities, Inc.
0.05%
Other
78.85%
Shareholder Types
Shareholders
Proportion
Corporation
19.93%
Investment Advisor
0.99%
Individual Investor
0.32%
Other
78.76%

Institutional Shareholding

Updated: Wed, Oct 1
Updated: Wed, Oct 1
Reporting Period
No. of institutions
Shares Held
Proportion
Change
2025Q3
41
25.33K
0.99%
-203.81K
2025Q2
56
658.14K
25.78%
-99.04K
2025Q1
71
671.74K
26.32%
+301.48K
2024Q4
77
255.43K
11.98%
+28.79K
2024Q3
82
6.34M
23.32%
+217.80K
2024Q2
84
5.82M
20.50%
+1.39M
2024Q1
86
4.12M
30.74%
+1.82M
2023Q4
96
2.53M
36.18%
+902.50K
2023Q3
116
2.49M
38.66%
+321.90K
2023Q2
123
1.45M
22.97%
-1.41M
View more

Shareholder Activity

Name
Shares Held
Proportion
Change
Chg %
Date
Hanmi Science Co Ltd
508.71K
19.93%
--
--
Apr 22, 2025
DRW Securities, LLC
19.76K
0.77%
+19.76K
--
Jun 30, 2025
Rice (William Glenn)
5.78K
0.23%
-360.00
-5.86%
Apr 22, 2025
The Gleason Group Inc.
4.21K
0.16%
+4.17K
+10415.00%
Jun 30, 2025
RBC Dominion Securities, Inc.
1.34K
0.05%
+1.33K
+12081.82%
Mar 31, 2025
Platzer (Erich)
1.12K
0.04%
--
--
Apr 22, 2025
Seizinger (Bernd R.)
566.00
0.02%
--
--
Apr 22, 2025
Bejar (Rafael)
244.00
0.01%
--
--
Apr 22, 2025
Payne (Charles Fletcher)
244.00
0.01%
--
--
Apr 22, 2025
Burger (Denis R)
48.00
0%
--
--
Apr 22, 2025
View more

Related ETFs

Name
Proportion
No Data

Dividend

A total of 0.00 USD has been distributed in dividends over the past 5 years.
Date
Dividend
Record Date
Payment Date
Ex-dividend Date
No Data

Stock Split

Date
Type
Ratio
Feb 18, 2025
Merger
30→1
Feb 18, 2025
Merger
30→1
Feb 18, 2025
Merger
30→1
Feb 18, 2025
Merger
30→1
Jun 02, 2023
Merger
15→1
Jun 02, 2023
Merger
15→1
Date
Type
Ratio
Feb 18, 2025
Merger
30→1
Feb 18, 2025
Merger
30→1
Feb 18, 2025
Merger
30→1
Feb 18, 2025
Merger
30→1
Jun 02, 2023
Merger
15→1
Jun 02, 2023
Merger
15→1
Jun 02, 2023
Merger
15→1
Jun 02, 2023
Merger
15→1
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