Arsenal invested the most as the leading clubs’ spending dwarfed that of the rest of the league but there was a greater emphasis on stability The Women’s Super League’s summer transfer window has closed before the start of the 2026-27 season. The finances involved are microscopic compared with the £3.4bn that Premier League clubs spent on new players but the data provides three key points of interest: which club has made the biggest improvement to their squad, who is banking on stability, and h…