v3.25.4

Investments in Group Enterprises and Associates - Summary of Investments in Group Enterprises and Associates (Detail) |  |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Mar. 21, 2025 | Mar. 19, 2025 | Jan. 31, 2025 | Jan. 31, 2024 | Nov. 30, 2018 | Dec. 31, 2025 | Dec. 31, 2024
Ascendis Pharma GmbH [member] |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |
Company |  |  |  |  |  | Ascendis Pharma GmbH |
Ownership |  |  |  |  |  | 100.00% |
Ascendis Pharma Endocrinology GmbH [member] |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |
Company |  |  |  |  |  | Ascendis Pharma Endocrinology GmbH |
Ownership |  |  |  |  |  | 100.00% |
Ascendis Pharma, LLC [member] |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |
Company |  |  |  |  |  | Ascendis Pharma, LLC |
Ownership |  |  |  |  |  | 100.00% |
Ascendis Pharma Endocrinology, Inc. [member] |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |
Company |  |  |  |  |  | Ascendis Pharma Endocrinology, Inc. |
Ownership |  |  |  |  |  | 100.00% |
Ascendis Pharma Ophthalmology Division A/S [member] |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |
Company |  |  |  |  |  | Ascendis Pharma, Ophthalmology Division A/S |
Ownership |  |  |  |  |  | 100.00% |
Ascendis Pharma Endocrinology Division A/S [member] |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |
Company |  |  |  |  |  | Ascendis Pharma Endocrinology Division A/S |
Ownership |  |  |  |  |  | 100.00% |
Ascendis Pharma Bone Diseases A/S [member] |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |
Company |  |  |  |  |  | Ascendis Pharma Bone Diseases A/S |
Ownership |  |  |  |  |  | 100.00% |
Ascendis Pharma Growth Disorders A/S [member] |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |
Company |  |  |  |  |  | Ascendis Pharma Growth Disorders A/S |
Ownership |  |  |  |  |  | 100.00% |
Ascendis Pharma Oncology Division AS [member] |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |
Company |  |  |  |  |  | Ascendis Pharma Oncology Division A/S |
Ownership |  |  |  |  |  | 100.00% |
Ascendis Pharma Europe A/S [member] |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |
Company |  |  |  |  |  | Ascendis Pharma Europe A/S |
Ownership |  |  |  |  |  | 100.00% |
Ascendis Pharma UK Limited [member] |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |
Company |  |  |  |  |  | Ascendis Pharma UK Limited |
Ownership |  |  |  |  |  | 100.00% |
Ascendis Pharma Iberia S.L. [member] |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |
Company |  |  |  |  |  | Ascendis Pharma Iberia S.L. |
Ownership |  |  |  |  |  | 100.00% |
Ascendis Pharma France SASU [member] |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |
Company |  |  |  |  |  | Ascendis Pharma France SASU |
Ownership |  |  |  |  |  | 100.00% |
Ascendis Pharma Italia S.R.L. [member] |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |
Company |  |  |  |  |  | Ascendis Pharma Italia S.R.L. |
Ownership |  |  |  |  |  | 100.00% |
Ascendis Pharma Sverige AB [member] |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |
Company |  |  |  |  |  | Ascendis Pharma Sverige AB |
Ownership |  |  |  |  |  | 100.00% |
Ascendis Pharma Switzerland GmbH [member] |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |
Company |  |  |  |  |  | Ascendis Pharma Switzerland GmbH |
Ownership |  |  |  |  |  | 100.00% |
Ascendis Pharma Belgium BV [member] |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |
Company |  |  |  |  |  | Ascendis Pharma Belgium BV |
Ownership |  |  |  |  |  | 100.00% |
ASND Portugal Unipessoal, Lda [member] |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |
Company |  |  |  |  |  | ASND Portugal, Unipessoal, Lda. |
Ownership |  |  |  |  |  | 100.00% |
VISEN |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |
Company |  |  |  |  |  | VISEN Pharmaceuticals |
Ownership | 39.20% | 43.90% |  |  | 50.00% | 39.20% | 43.90%
Eyconis Inc. |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |
Company |  |  |  |  |  | Eyconis Inc. |
Ownership |  |  | 33.20% | 41.60% |  | 33.20% |

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