Aptose Biosciences Inc. Annual report [Section 13 and 15(d), not S-K Item 405]

Annual report [Section 13 and 15(d), not S-K Item 405]

Cover
- Document And Entity Information
Financial Statements
Notes to Financial Statements
Accounting Policies
- Note 2 - Significant Accounting Policies (Policies)
Notes Tables
Notes Details

Note 17 - Income Taxes (Tables)

v3.26.1

Note 17 - Income Taxes (Tables)

12 Months Ended

Dec. 31, 2025

Notes To Financial Statements [Abstract]

Schedule of Loss before Income Taxes, Domestic and Foreign

For the years ended December 31, 2025 and 2024, the loss before income taxes is as follows:


	December 31, 2025			December 31, 2024
Loss attributed to U.S. foreign operations	$	(20,898	)	$	(21,564	)
Loss attributed to Canadian operations		(4,570	)		(3,866	)
Loss before income taxes	$	(25,468	)	$	(25,430	)

Schedule of Effective Income Tax Rate Reconciliation

Major items causing the Company’s income tax rate to differ from the statutory rate of approximately 15.0% (December 31, 2024 – 15.0%) are as follows:


	Year ended December 31, 2025			Year ended December 31, 2024
Net loss	$	(25,468	)	$	(25,430	)
Statutory Canadian corporate tax rate		15.0	%		15.0	%
Computed expected tax recovery	$	(3,820	)	$	(3,815	)
Foreign tax effects (United States)
Statutory tax rate difference between United States and Canada		(1,308	)		674
Changes in valuation allowances		1,317			(673	)
Other		(9	)		(1	)
Changes in valuation allowances		3,744			4,116
Non-taxable or non-deductible items		103			(392	)
Other		(27	)		91
	$	—		$	—

Schedule of Deferred Tax Assets and Liabilities

The tax effects of temporary differences that give rise to significant portions of the unrecognized deferred tax assets are presented below:


	December 31, 2025			December 31, 2024
Net operating losses carried forward	$	87,938		$	79,951
Research and development expenditures		5,023			5,016
Property, equipment, and other intangible assets		7,265			7,265
Research and development tax credits		4,822			4,864
Financing costs		718			909
Restricted interest and financing expenses		202			—
Right-of-use assets		5			13
Total deferred tax assets		105,973			98,018
Valuation allowance		(105,973	)		(98,018	)
Net deferred tax asset	$	—		$	—

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