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Share-based compensation (Tables)
 9 Months Ended
Sep. 30, 2023
Share-based Payment Arrangements [Abstract]  
Schedule of Shares Outstanding
The following table summarizes the share option awards outstanding as of September 30, 2023:

 Average strike price per share in USDNumber of awardsWeighted average remaining life
in years
December 31, 202218.30 10,755,494 8.46
Granted2.39 3,436,141 8.57
Option Exchange - Granted2.06 898,585 8.57
Forfeited13.29 (2,110,729)N/A
Option Exchange - Forfeited22.55 (2,197,458)N/A
September 30, 202311.58 10,782,033 8.08
Schedule of Fair Value Assumption For Options Granted
The fair values of the options granted under the Equity Incentive Plan 2019 during the three and nine months ended September 30, 2023 were determined on the date of the grant using the following assumptions:
 Three Months EndedThree Months EndedNine Months EndedNine Months Ended
 September 30, 2023September 30, 2022September 30, 2023September 30, 2022
Share price, in USD
0.82 - 1.51
4.83 - 8.54
0.82 - 5.45
4.83 - 19.69
Strike price, in USD
0.82 - 1.51
4.83 - 8.54
0.82 - 5.45
4.83 - 19.69
Expected volatility, in %
80%
70% to 80%
75% to 80%
70% to 80%
Award life, in years
6.08
6.08
6.08
6.08
Expected dividends————
Risk-free interest rate, in %
4.11% - 4.62%
2.61% - 3.77%
3.39% - 4.62%
1.46% - 3.77%
Schedule of Other Equity Instruments Outstanding
Number of awards Weighted average grant date fair value
December 31, 20221,585,877 13.26 
Granted979,680 2.13 
Vested(1,323,841)10.15 
Forfeited(259,258)8.10 
September 30, 2023982,458 8.27 
Schedule of Share-based Compensation Reserve
The movement in the Share-based Compensation Reserves (included in Other reserves within equity) is as follows:
Three months endedNine months ended
(in KUSD)September 30, 2023September 30, 2022September 30, 2023September 30, 2022
Equity Incentive Plan 2019 - Share Options1,277 8,193 5,343 27,158 
Equity Incentive Plan 2019 - RSUs728 6,372 5,649 15,135 
ESPP Expense78 — 283 — 
Tax and social charge deductions - Incentive Plan 2019— — — (512)
Total2,083 14,565 11,275 41,781