The 2016 Purdue spinout has been backed by angel investor Archibald Cox and the Ustar Tap accelerator as it seeks US defence agency-adoption for its missile propellant.
University of Michigan's manufacturing coolant spinout Fusion Coolant Systems has been backed by the institution's Mints fund, taking its total to $9.9m.
KIT-founded valve actuator manufacturer Memetis has received capital from the university and HTGF to help expand development and production.
The MIT industrial modelling tool spinout received commitments from Innogy and Shell to drive further adoption of its products in the energy sector.
Toyota has backed Imperial's spatial robotics software spinout SlamCore's latest round, adding to seed funding raised from Imperial Innovations and others in May 2017.
Satellite launching rocket producer Gilmour Space Technologies has been backed by Main Sequence Ventures, managers of Csiro Innovation Fund, taking its total to $17.4m.