Investment SoftBank's Vision Fund is the biggest technology investment portfolio ever. This is where its $93 billion has gone … September 18, 2017 johorbiznet Johor News SoftBank’s Vision Fund is the biggest technology investment portfolio ever. This is where its $93 billion has gone … Recode Slack is now worth over $5 billion after $250 million cash injection led by Japan’s SoftBank CNBC Slack valued at $5 billion following massive investment CNNMoney Slack valued at $5bn after SoftBank joins fundraising Financial Times Full coverage Source: Investment New Feed