Marble Institute of Technology

Research

What the registry showed, and when. We publish the misses next to the hits.

Zipline's fleet, day by day

Zipline's visible fleet doubled in six months to 2,853, and 406 of the 429 aircraft it added before its Uber deal were in the public file before the announcement.

Chart: Zipline's visible fleet and its funding-round valuations rose together from 2024. The fleet line is reconstructed before March 2026 and observed daily after.

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Ag drones after US policy

Heavy drone imports from China fell 76% in 2025. Chinese-made ag drone registrations followed a year later, down 40%.

Chart: monthly Chinese-made ag drone registrations on top, and US imports of heavy drones from China below, with US policy steps marked. Imports fell in 2025, and registrations fell in 2026.

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Each full study is available on request.

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