Bleichroeder LP

13F Holdings History for Aptose Biosciences Inc. - Common Shares (APTO)

Symbol: APTO
Investment type: Equity / Common Shares
Latest Disclosed Ownership: 41.7K shares
Security Ownership: 1.61%

Shares, Excluding Options vs Price

Value, Excluding Options

Bleichroeder LP ownership in Aptose Biosciences Inc. Common Shares (APTO)

2025-08-14 - Bleichroeder LP has filed an SCHEDULE 13G/A form with the Securities and Exchange Commission (SEC) disclosing ownership of 41.7K shares of Aptose Biosciences Inc. Common Shares (APTO). This represents 1.61% percent ownership of the company. In their previous filing dated 2025-05-13, Bleichroeder LP had reported owning 163K shares, indicating a decrease of -74.4% percent.

Reporting Name	Ownership %	Change	Value $	Shares owned	Change	Activity %	Price	Form	Report date	Filed at
Bleichroeder LP	1.61%	-78.2%	$4.58K	41.7K	-121,366	-74.4%	$0.11	13G/A	6/30/2025	14 Aug 2025 11:18:41
Bleichroeder LP	6.3%	-15%	$17.9K	163K			$0.11	13G/A	3/31/2025	13 May 2025 12:28:45
Bleichroeder LP	7.5%	+21.7%	$17.9K	163K	-3,586,968	-95.7%	$0.11	13G/A	3/24/2025	24 Mar 2025 18:48:11
Bleichroeder LP	6.2%		$413K	3.75M			$0.11	13G/A	3/19/2025	21 Mar 2025 19:14:11
Bleichroeder LP	6.2%		$413K	3.75M			$0.11	13G	12/31/2024	13 Feb 2025 20:26:59

Holdings date	Option	Weight	Change	Value $	Shares	Change	Activity %	Price	All Holders
3/31/2025			-0.14%	$0	0	-2,500,000	-100%		Q1 2025
12/31/2024		0.14%	+0.14%	$563K	2.5M	+2,500,000	NEW	$0.23	Q4 2024

* Reported Price is the price of the security as of the portfolio date. This value is significant in that it is the last known price at which the security was still held.
An asterisk sign (*) next to the price indicates that the price is likely invalid.