Operating expenses (Tables)

6 Months Ended

Jun. 30, 2026

Expenses by nature [abstract]

Disclosure of expenses by nature


(amounts in thousands of euros)
SALES AND MARKETING		FOR THE THREE MONTHS ENDED JUNE 30, 2025		FOR THE THREE MONTHS ENDED JUNE 30, 2026		FOR THE SIX MONTHS ENDED JUNE 30, 2025		FOR THE SIX MONTHS ENDED JUNE 30, 2026
Personnel costs		487		1,968		961		2,975
Consulting and professional fees		166		814		384		1,480
Other sales and marketing expenses		21		102		189		178
Sales & Marketing		674		2,885		1,534		4,633

Research and development expenses break down as follows:


(amounts in thousands of euros)
RESEARCH AND DEVELOPMENT EXPENSES		FOR THE THREE MONTHS ENDED JUNE 30, 2025		FOR THE THREE MONTHS ENDED JUNE 30, 2026		FOR THE SIX MONTHS ENDED JUNE 30, 2025		FOR THE SIX MONTHS ENDED JUNE 30, 2026
Sub-contracting, studies and research		30,139		31,481		59,292		51,276
Personnel costs		5,940		19,679		11,309		44,074
Consulting and professional fees		1,867		5,578		5,848		9,604
Intellectual property fees		238		443		476		874
Other research and development expenses		461		1,154		1,021		2,049
Research and development expenses		38,645		58,335		77,946		107,878


(amounts in thousands of euros)
GENERAL AND ADMINISTRATIVE EXPENSES		FOR THE THREE MONTHS ENDED JUNE 30, 2025		FOR THE THREE MONTHS ENDED JUNE 30, 2026		FOR THE SIX MONTHS ENDED JUNE 30, 2025		FOR THE SIX MONTHS ENDED JUNE 30, 2026
Personnel costs		5,488		17,461		10,547		19,101
Consulting and professional fees		1,768		4,829		3,703		8,173
Other general and administrative expenses		1,014		1,802		2,053		3,101
General and administrative expenses		8,270		24,092		16,303		30,376