US startups move from Series A to B 4 months faster than UK peers
- US startups take 19 months median from Series A to B
- UK startups take 23 months median for the same transition
- Seed to Series A rounds are 5 months slower in the UK than US
Across the 240 Series A to Series B round pairs Brouky tracks from 2015 to today, US startups exhibit a median transition time of 19 months, compared with 23 months in the UK. This 4-month gap highlights a faster round velocity in the US for this critical growth stage, though this trend may partly reflect expanding data coverage.
Looking at earlier rounds, the seed to Series A transition also shows a disparity: US startups move in 14 months median, whereas UK startups take 19 months, a 5-month longer interval. This suggests a consistent pattern where US startups progress through early funding rounds more quickly.
The interquartile ranges reinforce this trend. For Series A to B, the US 25th to 75th percentile spans 10 to 32 months, closely mirroring the UK’s 12 to 32 months but shifted slightly earlier. For seed to Series A, the US range is 8 to 23 months compared to the UK’s wider 11 to 33 months.
At the Series B to C+ stage, median times narrow, with the US at 22 months and the UK at 23 months, indicating convergence in later-stage round velocity, though the UK sample size is smaller and this pattern should be interpreted cautiously. The earlier-stage differences may reflect ecosystem dynamics impacting startup maturation speed.
Related insights
- Deal SpotlightHypersonica raises EUR100M Series B with General Catalyst and Lightspeed Venture Partners participating
- Deal SpotlightElax Energie raises EUR30M Series B backed by Noria, Crédit Mutuel Impact and FRES
- Cross-Country AnalysisSwitzerland’s Series B startups show a 53% single-round share, outpacing Israel’s 50%
- Cross-Country AnalysisFrance’s early-stage startups show a higher single-round funding share than the UK
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