Biggest startup funding rounds in May 2026
The largest startup rounds announced in May 2026, ranked by round size.
Rounds ranked11
Combined$75.48bn
Median$700m
- 1AnthropicSeries D+ AI · San Francisco · 28 May · led by Altimeter Capital, Dragoneer · $965bn valuation$65bn
- 2AndurilSeries D+ Defence & space · Costa Mesa · 13 May · led by Thrive Capital, Andreessen Horowitz · $61bn valuation$5bn
- 3Isomorphic LabsSeries B Healthtech & bio · London · 12 May · led by Thrive Capital$2.1bn
- 4CognitionSeries D+ Developer tools · San Francisco · 27 May · led by Lux Capital, General Catalyst · $26bn valuation$1bn
- 5SierraSeries D+ AI · San Francisco · 4 May · led by Tiger Global, GV · $15bn valuation$950m
- 6HarkSeries A AI · United States · 21 May · led by Parkway Venture Capital · $6bn valuation$700m
- 7RapidoGrowth Mobility & logistics · Bengaluru · 15 May · led by Prosus · $3bn valuation$240m
- 8FractileSeries B Robotics & hardware · London · 14 May · led by Accel, Factorial Funds$220m
- 9QuantWareSeries B Robotics & hardware · Delft · 5 May$178m
- 10ViktorSeries A AI · Warsaw · 19 May · led by Accel$75m
- 11NanoCoSeed AI · Tel Aviv · 20 May · led by Valley Capital Partners · $62m valuation$12m
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