v3.26.3
Notes to the interim condensed consolidated statement of income (loss) - Personnel costs and headcount (Details)
€ in Thousands
 6 Months Ended 12 Months Ended
Jun. 30, 2026
EUR (€)
employee
Jun. 30, 2025
EUR (€)
employee
Dec. 31, 2025
EUR (€)
Operating expenses      
Wages, salaries and similar costs € (8,880) € (5,920)  
Payroll taxes (3,606) (3,232)  
Provisions for retirement benefit obligations (82) 690  
Sharebased compensation expense (11,753) (6,721)  
Total personnel costs € (24,321) € (15,184)  
Number of employees | employee 87 84  
Expenses recorded on short-term provisions € 400   € 1,100
Expense of restructuring activities € 100   € 6,500
Inventiva S.A      
Operating expenses      
Number of employees | employee 60 75  
Inventiva Inc.      
Operating expenses      
Number of employees | employee 27 9  
Research and development expenses      
Operating expenses      
Wages, salaries and similar costs € (5,155) € (4,139)  
Payroll taxes (1,694) (1,675)  
Provisions for retirement benefit obligations (37) 255  
Sharebased compensation expense (3,509) (1,251)  
Total personnel costs (10,396) (6,811)  
Marketing - business development expenses      
Operating expenses      
Wages, salaries and similar costs (417) (65)  
Payroll taxes (79) (8)  
Sharebased compensation expense (460)    
Total personnel costs (955) (73)  
General and administrative expenses      
Operating expenses      
Wages, salaries and similar costs (3,308) (1,716)  
Payroll taxes (1,834) (1,549)  
Provisions for retirement benefit obligations (44) 435  
Sharebased compensation expense (7,784) (5,470)  
Total personnel costs € (12,970) € (8,300)