v3.26.1
Financial risk management - Financial risk factors (Details) - EUR (€)
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Financial risk management    
Financial assets € 3,133,264,000 € 3,494,788,000
Financial liabilities 39,541,000 96,533,000
Liquidity risk [member]    
Liquidity risk    
Financial Investments And Cash And Cash Equivalents € 2,998,000,000  
Maximum Notice Period For Converting Cash And Cash Equivalents. 3 months  
Current financial instruments    
Financial risk management    
Financial liabilities at fair value through profit or loss € 5,000 5,000
Non-current contingent consideration related to milestones CellPoint    
Financial risk management    
Financial liabilities at fair value through profit or loss   20,576,000
Trade & other liabilities    
Financial risk management    
Financial liabilities at amortised cost 32,621,000 64,230,000
Lease liabilities    
Financial risk management    
Financial liabilities at amortised cost 6,915,000 11,722,000
Equity instruments    
Financial risk management    
Financial assets held at fair value through other comprehensive income 46,809,000 52,941,000
Contingent consideration receivable [member]    
Financial risk management    
Financial assets held at fair value through profit or loss 54,705,000 47,207,000
Current financial investments    
Financial risk management    
Financial assets held at fair value through profit or loss 1,472,031,000 1,484,599,000
Financial assets at amortized cost 1,438,149,000 1,768,917,000
Cash and cash equivalents    
Financial risk management    
Financial assets at amortized cost 87,868,000 64,239,000
Restricted cash (current and non-current)    
Financial risk management    
Financial assets at amortized cost 1,759,000 1,985,000
Other non-current assets.    
Financial risk management    
Financial assets at amortized cost 1,200,000 1,266,000
Trade receivables    
Financial risk management    
Financial assets at amortized cost 9,568,000 32,471,000
Escrow account [member]    
Financial risk management    
Financial assets at amortized cost   € 41,163,000
Convertible loan [member]    
Financial risk management    
Financial assets held at fair value through profit or loss € 21,175,000