Upper90
Assembly Line
STAX Engineering Secures $40M to Bring the 3 Largest Shipping Vessel Classes into California Air Resources Board Compliance
STAX Engineering, a pioneer in maritime emissions capture and control, closed a $40M funding round led by Upper90, a leading provider of hybrid growth capital. Upper90 has provided flexible capital to finance the build out of STAX’s fleet of mobile emissions capture and control barges; the expansion will accelerate over the next six months to meet increasing demand across container and auto carrier classes as well as broaden coverage to include tankers. As California Air Resources Board regulations expand to include tankers beginning in January 2025, this concerted push from STAX will best position the organization to service the newly regulated class.
STAX’s patented, flexible exhaust capture system is designed to fit all ships without modification, even in the most congested ports. Once the exhaust is captured and funneled into the STAX system, it is filtered. STAX removes 99% of particulate matter (PM) and 95% of oxides of nitrogen (NOx) before being released as purified gas. To date, STAX has treated 83 at-berth vessels for a cumulative of 4,000 hours and controlled 31 tons of pollutants—and counting.