ActivumSG, led by Saul Goldstein, is a venture capital fund that focuses on Series B investments in payments and fintech. They invest between $500,000 and $10,000,000 per company, seeking opportunities that other funds might overlook. Founded in 2007, ActivumSG operates across Europe with teams in Germany, Spain, Denmark, the Netherlands, and the UK. Their portfolio includes companies like Storebox, and they are known for their hands-on approach to adding value throughout an asset's lifecycle.