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Share-based payments (Tables) | 12 Months Ended
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Sep. 30, 2025
Share-Based Payment Arrangements [Abstract] |
Disclosure of information concerning PSUs | The following table presents information concerning the number of outstanding PSUs granted by the Company under the Share Unit Plan:
Outstanding as at September 30, 2023 | 2,252,450 |
Granted 1 | 799,418 |
Exercised (Note 19) | (280,265) |
Forfeited | (243,403) |
Outstanding as at September 30, 2024 | 2,528,200 |
Granted 1 | 674,259 |
Exercised (Note 19) | (765,318) |
Forfeited | (418,173) |
Dividends | 8,588 |
Outstanding as at September 30, 2025 | 2,027,556 |
1 The PSUs granted in 2025 had a weighted average grant date fair value of $159.44 per unit ($137.90 in 2024).
Disclosure of information concerning outstanding stock options | The following table presents information concerning the outstanding stock options granted by the Company:
|  | 2025 |  | 2024
| Number of options | Weighted average exercise price per share | Number of options | Weighted average exercise price per share
|  | $ |  | $
Outstanding, beginning of year | 3,862,527 |  | 74.53 |  | 5,211,472 |  | 70.21 |
Exercised (Note 19) | (947,071) |  | 65.45 |  | (1,333,876) |  | 57.38 |
Forfeited | — |  | — |  | (12,575) |  | 97.84 |
Expired | (2,983) |  | 84.91 |  | (2,494) |  | 98.65 |
Outstanding, end of year | 2,912,473 |  | 77.48 |  | 3,862,527 |  | 74.53 |
Exercisable, end of year | 2,912,473 |  | 77.48 |  | 3,699,805 |  | 73.51 |
Disclosure of range of exercise prices of outstanding stock options | The following table summarizes information about the outstanding stock options granted by the Company as at September 30, 2025:
|  | Options outstanding and exercisable |
Range of exercise price | Number of options | Weighted average remaining contractual life | Weighted average exercise price |  |
$ |  | (in years) | $ |  |
47.81 to 52.63 | 43,095 |  | 0.02 | 49.10 |  |  |
57.21 to 63.23 | 1,391,588 |  | 1.51 | 63.22 |  |  |
67.04 to 85.62 | 847,418 |  | 2.93 | 84.47 |  |  |
97.84 to 110.73 | 630,372 |  | 4.93 | 101.50 |  |  |
| 2,912,473 |  | 2.64 | 77.48 |  |
Disclosure of number of options and weighted average remaining contractual life | The following table summarizes information about the outstanding stock options granted by the Company as at September 30, 2025:
|  | Options outstanding and exercisable |
Range of exercise price | Number of options | Weighted average remaining contractual life | Weighted average exercise price |  |
$ |  | (in years) | $ |  |
47.81 to 52.63 | 43,095 |  | 0.02 | 49.10 |  |  |
57.21 to 63.23 | 1,391,588 |  | 1.51 | 63.22 |  |  |
67.04 to 85.62 | 847,418 |  | 2.93 | 84.47 |  |  |
97.84 to 110.73 | 630,372 |  | 4.93 | 101.50 |  |  |
| 2,912,473 |  | 2.64 | 77.48 |  |
Disclosure of share-based payment expense | The share-based payment expense recorded in costs of services, selling and administrative is as follows:
|  | Year ended September 30
|  | 2025 | 2024
|  | $ | $
PSUs |  | 68,636 |  | 67,054 |
Stock options |  | — |  | 786 |
Share purchase plan |  | 196,510 |  | 181,989 |
DSUs |  | (743) |  | 4,384 |
|  | 264,403 |  | 254,213

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- Definition The disclosure of the number and weighted average exercise prices of other equity instruments (ie other than share options). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 2 -IssueDate 2025-01-01 -Paragraph 45 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2025-en-r&anchor=para_45&doctype=Standard -URIDate 2025-03-27 + Details
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- Definition The disclosure of the number and weighted average exercise prices of share options. [Refer: Weighted average [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2025-01-01 -Paragraph 45 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2025-en-r&anchor=para_45_b&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 -Paragraph 31 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_31_b&doctype=Standard -URIDate 2025-03-27 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2027-01-01 -Name IFRS -Number 19 -IssueDate 2025-01-01 -Paragraph 31 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_31_b&doctype=Standard -URIDate 2025-03-27 + Details
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- Definition The disclosure of the number and weighted average remaining contractual life of outstanding share options. [Refer: Weighted average [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2025-01-01 -Paragraph 45 -Subparagraph d -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2025-en-r&anchor=para_45_d&doctype=Standard -URIDate 2025-03-27 + Details
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