v3.26.1
Share-based payments (Tables)
12 Months Ended
Dec. 31, 2025
Disclosure of terms and conditions of share-based payment arrangement [line items]  
Disclosure of number and weighted average grant date fair value of other equity Instruments Explanatory

Information on free shares activity is as follows:

 

Number of Free shares Outstanding

 

Weighted-Average Grant Date Fair Value (in €)

 

 

 

 

 

 

Balance as of January 1, 2023

 

909,113

 

 

11.18

 

Granted

 

342,900

 

 

3.08

 

Vested

 

(167,433

)

 

22.45

 

Cancelled

 

(67,042

)

 

11.40

 

 

 

 

 

 

Balance as of December 31, 2023

 

1,017,538

 

 

6.59

 

Granted

 

-

 

 

-

 

Additional shares due to May 2024 modification

 

44,650

 

 

1.71

 

Vested

 

(342,675

)

 

11.89

 

Cancelled

 

(210,219

)

 

6.00

 

 

 

 

 

 

Balance as of December 31, 2024

 

509,295

 

 

2.84

 

Granted

 

-

 

 

-

 

Vested

 

(231,992

)

 

2.60

 

Cancelled

 

(25,356

)

 

3.21

 

 

 

 

 

 

Balance as of December 31, 2025

 

251,946

 

 

3.02

 

Warrants [member]  
Disclosure of terms and conditions of share-based payment arrangement [line items]  
Summary of Information on Stock Option Activity

Information on warrants activity is as follows:

 

Warrants Exercisable

 

Weighted-Average Exercise Price Per Share (in €)

 

Warrants Outstanding

 

Weighted-Average Exercise Price Per Share (in €)

 

Remaining Average Useful Life (in years)

 

 

 

 

 

 

 

 

 

 

 

 

Balance as of January 1, 2023

 

896,225

 

 

27.18

 

 

896,225

 

 

27.18

 

 

3.3

 

Granted

 

 

 

 

 

-

 

 

-

 

 

 

Exercised

 

 

 

 

 

-

 

 

-

 

 

 

Forfeited or Expired

 

(557,350

)

 

27.48

 

 

(557,350

)

 

27.48

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Balance as of December 31, 2023

 

338,875

 

 

26.69

 

 

338,875

 

 

26.69

 

 

2.4

 

Granted

 

 

 

 

 

-

 

 

-

 

 

 

Exercised

 

 

 

 

 

-

 

 

-

 

 

 

Forfeited or Expired

 

 

 

 

 

-

 

 

-

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Balance as of December 31, 2024

 

338,875

 

 

26.69

 

 

338,875

 

 

26.69

 

 

1.4

 

Granted

 

 

 

 

 

75,000

 

 

2.59

 

 

 

Exercised

 

 

 

 

 

-

 

 

-

 

 

 

Forfeited or Expired

 

 

 

 

 

(244,375

)

 

27.91

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Balance as of December 31, 2025

 

117,938

 

 

19.35

 

 

169,500

 

 

14.25

 

 

4.8

 

Summary of assumptions Weighted-average Fair Values of Warrants Granted and Assumptions Used for Black-Scholes Option Pricing Model

The weighted-average fair values of warrants granted and the assumptions used for the Black-Scholes option pricing model were as follows:

 

For the twelve-month period ended December 31,

2025

 

 

Weighted-Average fair values of warrants granted

1.43€

Assumptions:

 

Risk-free interest rate

2.82%

Share entitlement per warrant

1

Subscription price

0.13€

Exercise price

2.59€

Underlying stock price at grant date

2.36€

Expected volatility

70.73%

Expected term (in years)

5.5

Vesting conditions

Service

Vesting period

Graded

Stock options [member]  
Disclosure of terms and conditions of share-based payment arrangement [line items]  
Summary of Information on Stock Option Activity

Information on stock option activity follows:

 

 

Options Exercisable

 

Weighted-Average Exercise Price Per Share (in €)

 

Options Outstanding

 

Weighted-Average Exercise Price Per Share (in €)

 

Remaining Average contractual Life (in years)

 

 

 

 

 

 

 

 

 

 

 

 

Balance as of January 1, 2023

 

7,400,519

 

 

24.58

 

 

8,787,264

 

 

22.31

 

 

4.6

 

Granted

 

 

 

 

 

1,835,411

 

 

2.86

 

 

 

Exercised

 

 

 

 

 

-

 

 

-

 

 

 

Forfeited or Expired

 

 

 

 

 

(79,516

)

 

22.86

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Balance as of December 31, 2023

 

7,913,183

 

 

23.63

 

 

10,543,159

 

 

18.92

 

 

4.6

 

Granted

 

 

 

 

 

3,054,163

 

 

2.51

 

 

 

Exercised

 

 

 

 

 

-

 

 

-

 

 

 

Forfeited or Expired

 

 

 

 

 

(1,078,028

)

 

4.50

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Balance as of December 31, 2024

 

8,546,368

 

 

22.34

 

 

12,519,294

 

 

16.16

 

 

4.6

 

Granted

 

 

 

 

 

6,346,033

 

 

1.49

 

 

 

Exercised

 

 

 

 

 

(13,438

)

 

2.17

 

 

 

Forfeited or Expired

 

 

 

 

 

(2,811,646

)

 

31.33

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Balance as of December 31, 2025

 

7,523,716

 

 

14.42

 

 

16,040,242

 

 

7.71

 

 

6.4

 

Summary of assumptions Vesting Details

The weighted-average fair values of stock options granted and the assumptions used for the Black-Scholes option pricing model were as follows:

 

 

For the twelve-month period ended December 31,

2023

2024

2025

 

 

 

 

Weighted-Average fair values of stock options granted

1.65€

1.41€

0.89€

Assumptions:

 

 

 

Risk-free interest rate

2.45% - 2.75%

2.51% - 2.99%

2.78% - 3.06%

Share entitlement per options

1

1 - 1.06

1

Exercise price

1.74€ - 3.17€

1.70€ - 2.82€

1.26€ - 4.07€

Underlying stock price at grant date

1.70€-3.09€

1.67€-2.76€

1.26€-4.02€

Expected volatility

63.7% - 64.4%

64.6%- 65.2%

65.0%- 72.2%

Expected term (in years)

6.03 - 6.15

6.03 - 6.17

5.93 - 6.16

Vesting conditions

Performance & Service or Service

Performance & Service or Service

Performance & Service or Service only

Vesting period

Graded

Graded

Graded