This report analyzes founder equity stakes across various stages of company growth, focusing on private, high-growth companies headquartered in the UK. It highlights that equity ownership serves as a significant incentive for startup founders to remain engaged with their companies during growth phases. The report details how founder stakes typically decrease as companies progress through funding rounds, with average stakes being highest at the seed and established stages. It presents data indicating that female founders tend to retain a larger average stake than their male counterparts, particularly at the seed stage. Additionally, the report discusses the impact of equity fundraising on founder stakes, noting a clear inverse relationship between the amount raised and the proportion of shareholdings owned by founders. The findings are based on specific criteria for identifying high-growth companies and include insights into the dynamics of equity investment and founder control.