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Share Capital and Treasury Shares - Summary of Reserves Within Equity (Detail) - shares | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Disclosure of reserves within equity [line items] |  |  |  |
Conversion of class B ordinary shares to class A ordinary shares |  | 4,281,379 | 0 | 21,243,000
Class A ordinary shares [Member] |  |  |  |
Disclosure of reserves within equity [line items] |  |  |  |
Beginning balance, Number of shares |  | 62,327,851 | 62,327,851 | 41,084,851
Convertion of class B ordinary shares to class A ordiniary shares Number of shares |  |  |  | 21,243,000
Repurchase of ordinary shares | [1] |  | 0 |
Issued during the year | [2],[3],[4] | 77,467,980 |  |
Conversion of class B ordinary shares to class A ordinary shares |  | 4,281,379 |  |
Ending balance, Number of shares |  | 144,077,210 | 62,327,851 | 62,327,851
Class B ordinary shares excluding treasury shares [Member] |  |  |  |
Disclosure of reserves within equity [line items] |  |  |  |
Beginning balance, Number of shares |  | 114,138,955 | 183,283,628 | 204,526,628
Convertion of class B ordinary shares to class A ordiniary shares Number of shares |  |  |  | (21,243,000)
Repurchase of ordinary shares | [1] | (36,923,963) | (69,144,673) |
Issued during the year | [2],[3],[4] | 54,524,730 |  |
Conversion of class B ordinary shares to class A ordinary shares |  | (4,281,379) |  |
Ending balance, Number of shares |  | 127,458,343 | 114,138,955 | 183,283,628
Class B treasury shares [Member] |  |  |  |
Disclosure of reserves within equity [line items] |  |  |  |
Beginning balance, Number of shares |  | 69,144,673 | 0 |
Repurchase of ordinary shares | [1] | 36,923,963 | 69,144,673 |
Issued during the year | [2],[3],[4] | 0 |  |
Ending balance, Number of shares |  | 106,068,636 | 69,144,673 | 0
[1] | On September 30, 2021 and December 31,2022, the Company repurchased 69,144,673 and 36,923,963 ,respectively, Class B ordinary shares from the immediate holding company, amounting to HK$5,000,000,000 and HK$2,500,000,000. Details on N ote 28.
[2] | During the year ended December 31, 2022, the Company acquired a controlling stake in AMTD Digital by issuing 67,200,330 Class A and 51,253,702 Class B shares to the selling shareholders of AMTD Digital at a consideration of HK$7,756,228,581.
[3] | In January 2022, the convertible bond has been converted into 1,856,436 class A ordinary shares at the conversion price of US$8.08 per share.
[4] | In January and April 2022, the Company issued 8,411,215 Class A and 3,271,028 Class B shares to the private investors at US$4.28 per share.

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