As of end of May, CEX spot volume stands at $6.89trn; and has | AlexClay - Trading Analyzes & Tips

As of end of May, CEX spot volume stands at $6.89trn; and has eclipsed the accumulated 2017-2020 volume ($4.7trn) by 46.6%.

The leading exchanges are:
Binance ($4.73trn, 68.6%),
Coinbase ($624bn, 9.1%),
Kraken ($326bn, 4.7%),
LMAX ($273bn, 4%),
Bitfinex ($250bn, 3.6%)