Simon GreenUK seed rounds held steady in the first half of 2026
Deal counts were flat year on year while median cheque sizes edged up, according to figures compiled for the Wire.
UK seed investment held broadly flat in the first half of 2026, with deal counts within a few percent of the same period last year.\n\nMedian round size rose modestly, a pattern investors attribute to founders raising longer runways rather than to higher valuations. Pre-seed activity was softer, particularly outside London and the South East.\n\nSector mix continues to shift: climate and defence-adjacent hardware took a larger share of rounds, while consumer marketplaces fell to their lowest share in five years.