STS Digital, a Bermuda-based crypto options trading platform and market maker, has raised $30 million in a funding round led by CMT Digital. The round also saw participation from notable investors including crypto exchange Kraken, Arrington Capital, and Fidelity's investment arm. Founded by former Credit Suisse trader Maxime Seiler and former UBS trader Gideon Hyams, STS Digital offers options contracts for over 400 cryptocurrencies to institutional investors.