According to @GreeksLive, for August 18-24, notional crypto options block trade volume totaled $780,198,021, with $632.6 million executed on Deribit and $147.6 million on OKX, source: @GreeksLive. This equates to approximately 81.1 percent share for Deribit and 18.9 percent for OKX over the week, highlighting venue concentration in reported block flows, source: @GreeksLive. A recap of the top 5 block trades for the period was also posted, source: @GreeksLive.