Ampaire has closed a $19 million Series B funding round led by DiamondStream Partners, bringing the company's total funding to $68 million, including approximately $25 million in non-dilutive grants and contracts. The round included strategic participation from Alaska Airlines and International Airlines Group. The California-based company develops hybrid-electric propulsion systems for aircraft. It operates the world's largest fleet of flying full-scale hybrid-electric aircraft and has completed more than 38,000 hybrid-electric miles of test flights. Ampaire will use the proceeds to accelerate commercial deployment, expand flight operations under the FAA eIPP programme, produce additional Eco Caravan units, advance regulatory progress, and increase manufacturing capabilities. The company's Eco Caravan has demonstrated approximately 54-57% lower total fuel burn than legacy turboprop-powered configurations.

AraBat, an Italian startup founded in 2022, has secured €280,000 in public funding through Italy's TecnoNidi programme to build a pilot facility for battery recycling using agricultural waste. The company extracts lithium and rare earth metals from spent lithium-ion batteries using weak organic acids and biomass from crops like oranges and artichokes, rather than traditional industrial solvents. The funding adds to €70,000 received in March from Italy's circular economy competition, bringing total disclosed government funding to €350,000. AraBat has also signed development agreements with Japanese electronics manufacturer TAIYO YUDEN and established a joint venture with Canadian firms EVSX and St-Georges Eco-Mining to build an industrial plant in Puglia, where AraBat holds 51 per cent ownership. The company operates with between two and 10 employees and holds an Italian patent for its AraMet technology.