Ascendance Secures €12.2M Investment And Begins Scaling Up its STERNA Hybrid-Electric Propulsion System

Toulouse start­up Ascen­dance has announced a €12.2M invest­ment through France’s France 2030 – Pre­mière Usine (First Fac­to­ry) pro­gram, allow­ing the com­pa­ny to move from pro­to­type devel­op­ment of its STERNA Hybrid Pack propul­sion sys­tem, to series pro­duc­tion.

Announced yes­ter­day (Wednes­day), the four-year fund­ing com­mit­ment also enables Ascen­dance to move for­ward with its bat­tery solu­tion, with assem­bly of its ATEA air­craft to fol­low. The invest­ment rep­re­sents a deci­sive indus­tri­al mile­stone for struc­tur­ing a decar­bonized and sov­er­eign aero­space sec­tor in Europe.

Mov­ing for­ward, the com­pa­ny will struc­ture its pro­duc­tion capa­bil­i­ties and accel­er­ate invest­ment to meet grow­ing demand in both civ­il and defense mar­kets.

Jean-Christophe Lam­bert, CEO of Ascen­dance, said: “Tomor­row’s avi­a­tion is not decreed—it is built, indus­tri­al­ized, and it must hap­pen here, in Europe. With France 2030 sup­port, we cross a major mile­stone. This fund­ing enables us to move from pro­to­type to pro­duc­tion. It is a deci­sive step in build­ing a Euro­pean hybrid-elec­tric sec­tor capa­ble of respond­ing to both decar­boniza­tion and sov­er­eign­ty imper­a­tives.”

Beyond the fund­ing, Ascen­dance says this deci­sion sig­nals strong sup­port from France for a next-gen­er­a­tion avi­a­tion sector—one that is both sus­tain­able and sov­er­eign.

It says the deci­sion also val­i­dates the tech­no­log­i­cal choice Ascen­dance has pur­sued since its found­ing in 2018; that hybrid-elec­tric is rec­og­nized as the most cred­i­ble path­way for decar­boniz­ing civ­il avi­a­tion in the near and medi­um term, while meet­ing per­for­mance, endurance, and resilience require­ments for defense appli­ca­tions.

From Pro­to­type to Series Pro­duc­tion

At the core of this scal­ing: STERNA Hybrid Pack, the mod­u­lar hybrid-elec­tric propul­sion sys­tem devel­oped by Ascen­dance. Built on over four years of bench test­ing and pro­tect­ed by sev­er­al patents, STERNA deliv­ers sig­nif­i­cant reduc­tions in fuel con­sump­tion and CO₂ emis­sions. The sys­tem com­bines next-gen­er­a­tion bat­ter­ies with pro­pri­etary ener­gy man­age­ment soft­ware called the Hybrid Oper­at­ing Sys­tem.

This sys­tem is designed to equip region­al air­craft and defense drones alike. It forms the tech­no­log­i­cal foun­da­tion for ATEA, a ver­ti­cal take­off and land­ing air­craft cur­rent­ly in the final inte­gra­tion phase—a low-car­bon alter­na­tive to light heli­copters for region­al trans­port (pas­sen­gers, car­go, med­ical, secu­ri­ty mis­sions).

A Clear Indus­tri­al Roadmap to Mar­ket

With France 2030 sup­port, Ascen­dance has estab­lished a con­crete, mul­ti-phase pro­duc­tion strat­e­gy.

Phase 1: Pro­duc­tion Capac­i­ty — Ascen­dance will accel­er­ate estab­lish­ment of pro­duc­tion capac­i­ty for STERNA with­in its cur­rent facil­i­ties at Muret L’Herm air­field, enabling equip­ping of ini­tial civ­il air­craft pro­grams and defense drones.

Phase 2: Fac­to­ry Expan­sion — Over the medi­um term, Ascen­dance plans cre­ation of a new ded­i­cat­ed man­u­fac­tur­ing facil­i­ty to increase pro­duc­tion vol­umes and pro­gres­sive­ly inte­grate assem­bly of its civ­il and defense air­craft. This scale-up will lever­age opti­mized indus­tri­al process­es com­bin­ing automa­tion, robot­ics, and advanced man­u­fac­tur­ing meth­ods.

Mar­ket Impact — This struc­tured roadmap posi­tions Ascen­dance to meet grow­ing demand across civ­il and defense sec­tors, while demon­strat­ing indus­tri­al matu­ri­ty and man­u­fac­tur­ing com­mit­ment to oper­a­tors, part­ners, and investors world­wide.

A Strong Sig­nal for Euro­pean Tech­no­log­i­cal Sov­er­eign­ty

By sup­port­ing Ascen­dance, France accom­pa­nies the emer­gence of an indus­tri­al actor posi­tioned on crit­i­cal tech­nolo­gies for tomor­row’s avi­a­tion. At a moment when the lim­its of all-elec­tric and uncer­tain­ties around hydro­gen chal­lenge the sec­tor, hybrid-elec­tric is estab­lish­ing itself as an imme­di­ate­ly deploy­able solu­tion to reduce emis­sions while guar­an­tee­ing per­for­mance and auton­o­my.

This fund­ing is part of a broad­er strat­e­gy to strength­en indus­tri­al and tech­no­log­i­cal sov­er­eign­ty for France and Europe, secur­ing key val­ue chains in high-stakes mar­kets.

About Ascen­dance

Found­ed in 2018 by Lam­bert, Thibault Bal­divia, Clé­ment Dinel and Benoît Fer­ran, Ascen­dance designs and indus­tri­al­izes next-gen­er­a­tion hybrid-elec­tric propul­sion sys­tems to meet the decar­boniza­tion and per­for­mance chal­lenges of civ­il and defense avi­a­tion, dri­ven by the con­vic­tion that hybrid-elec­tric opens a new era of mod­ern avi­a­tion.

Based in Toulouse — Europe’s aero­space cap­i­tal — and backed by Bpifrance, the France 2030 pro­gram, and the Région Occ­i­tanie, the start­up devel­ops STERNA Hybrid Pack, an inno­v­a­tive dual-use hybrid-elec­tric propul­sion sys­tem com­bin­ing per­for­mance, range, and emis­sions reduc­tion.

This hybrid propul­sion sys­tem pow­ers ATEA, a ver­ti­cal take­off and land­ing (VTOL) air­craft designed as a low-car­bon alter­na­tive to light heli­copters for region­al air trans­port — pas­sen­gers, car­go, med­ical, and secu­ri­ty mis­sions. Ascen­dance thus car­ries a dual civ­il and defense ambi­tion in ser­vice of a sov­er­eign aero­nau­ti­cal tran­si­tion.