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Related party transactions (Tables)

12 Months Ended

Sep. 30, 2025

Related party transactions [abstract]

Disclosure of transactions with subsidiaries

The Company’s principal subsidiaries whose revenues, based on the geographic delivery model, represent more than 3% of the consolidated revenues are as follows:

Name of subsidiary			Country of incorporation
CGI Technologies and Solutions Inc.			United States
CGI France SAS			France
CGI Federal Inc.			United States
CGI IT UK Limited			United Kingdom
CGI Information Systems and Management Consultants Inc.			Canada
Conseillers en gestion et informatique CGI inc.			Canada
CGI Deutschland B.V. & Co. KG			Germany
CGI Information Systems and Management Consultants Private Limited			India
CGI Sverige AB			Sweden
CGI Suomi Oy			Finland
CGI Nederland B.V.			Netherlands

Disclosure of compensation of key management personnel

Compensation of key management personnel, currently defined as the executive officers and the Board of Directors of the Company, was as follows for the year ended September 30:

			2025			2024
			$			$
Short-term employee benefits			30,043			31,076
Share-based payments			37,002			40,209

X

- Definition

The disclosure of interests in subsidiaries. [Refer: Total for all subsidiaries [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
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-IssueDate 2025-01-01
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- Definition

The disclosure of transactions between the entity and its related parties. [Refer: Total for all related parties [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 24
-IssueDate 2025-01-01
-Paragraph 18
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=24&code=ifrs-tx-2025-en-r&anchor=para_18&doctype=Standard
-URIDate 2025-03-27

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Note Effective 2027-01-01
-Name IFRS
-Number 19
-IssueDate 2025-01-01
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-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_230&doctype=Standard
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Note Effective 2027-01-01
-Name IFRS
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