"Founded in 2016, Deribit caters mainly to institutional investors and co-founders John Jansen, Marius Jansen and Sebastian Smyczýnski keep a low profile compared to FTX's Sam Bankman-Fried and Binance's Changpeng Zhao. Despite this, Deribit has claimed an 88% share of open interest in bitcoin options trading, according to data from The Block's Research team."

https://www.theblock.co/post/172752/deribit-funding-round-internal-400-million-valuation