Funding rounds
Announced	Stage	Amount	Valuation	Lead investors	Other investors	Confidence
May 21, 2026	Undisclosed	€17.0M	—	—	Electricite de France (EDF), Exergon, Fortil, Groupe ADF, Ingerop, Normandie Participations, Onet Technologies, REEL Group, SNEF Group	Confirmed
Dec 5, 2024	Seed	€2.5M	—	—	Axe Capitole, CEA Investissement, Ekium, Exergon, Fortil, Groupe ADF, NGE, REEL Group	Reported

Totals add known amounts using recorded USD conversions where available; other currencies are shown separately. A ~ marks an estimated amount.

Sources9

1
CompanyRéacteur nucléaire 4ème génération | Otrera - Redefine nuclear energy
Otrera · Supports Organization · description, Organization · name, Organization · website
“Otrera développe un réacteur nucléaire innovant de 4ème génération pour produire une énergie durable, bas carbone et compétitive.”
2
DatabaseOtrera - PitchBook company profile
PitchBook · Supports Organization · employee range, Organization · linkedin url, Organization · x url
“employee_range: 11-50 (profile: 45)”
3
DatabaseSixth-Domain public startup directory
Sixth-Domain · Supports Organization · country, Organization · kind
“{"country": "France", "hq_iso2": "FR", "id": "41a69f99-36ac-4f74-80b8-ec77e220e939"}”
4
DatabaseOtrera - Crunchbase company profile
Crunchbase · Supports Organization · employee range, Organization · hq city, Organization · linkedin url, Organization · x url
“employee_range: 11-50 (profile: 11-50)”
5
DatabaseOtrera - LinkedIn company profile
LinkedIn · Supports Organization · employee range, Organization · linkedin url
“employee_range: 11-50 (profile: 11-50 employees)”

6
CompanyTechnologie et combustible | OTRERA - Redefine nuclear energy
Otrera · Supports System
“Le réacteur OTRERA 110 produit 110 MW d’électricité et 180 MW de chaleur à 100-150°C que l’on peut multiplier facilement en implantant plusieurs réacteurs et moduler pour s’adapter aux besoins.”

7
CompanyOTRERA accelerates: €17M secured to advance its 4th-generation fast neutron reactor
Otrera · May 21, 2026 · Supports Funding round · amount
“OTRERA announces €17 million in funding, consisting of equity and grants from the France 2030 program.”
8
NewsOtrera boucle sa première levée de fonds de 2,5 millions
Gomet' · Dec 23, 2024 · Supports Funding round · amount
“a annoncé le 5 décembre dernier la clôture de son premier tour de levée de fonds, qui a permis de réunir 2,5 millions d’euros”
9
NewsFrench Nuclear Startup Otrera Completes €17 Million Funding Round For Generation IV Reactor
NucNet · Supports Funding round
“The funding round also includes shareholders such as Groupe ADF, Groupe EDF, Exergon Fund, Ingerop, Fortil Group, Normandie Participations, Onet Technologies, REEL Group, and SNEF Group.”

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