v3.25.4

Ownership | 12 Months Ended
--- | ---
Dec. 31, 2025
Disclosure Of Beneficial Ownership [abstract] |
Ownership | Note 22—Ownership The following investors, or groups of affiliated investors, are known by us to beneficially own more than 5% of the Company’s outstanding ordinary shares at December 31, 2025: • Entities affiliated with RA Capital Management, LLC, USA • Westfield Capital Management Company, L.P., USA • Entities affiliated with FMR LLC, USA • Avoro Capital Advisors LLC, USA • Entities affiliated with Artisan Partners LP, USA • Entities affiliated with Janus Henderson Group plc, United Kingdom • Entities affiliated with Capital International Investors The Company’s American Depository Shares are held through BNY (Nominees) Limited as nominee, of The Bank of New York Mellon, UK (as registered holder of the Company’s outstanding ADSs).

X
- Definition Disclosure Of Beneficial Ownership [abstract] + References No definition available. + Details
Name: | asnd_DisclosureOfBeneficialOwnershipAbstract
Namespace Prefix: | asnd_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The entire disclosure of beneficial ownership explanatory. + References No definition available. + Details
Name: | asnd_DisclosureOfBeneficialOwnershipExplanatory
Namespace Prefix: | asnd_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration