A litle careful when you read my above post.
It does not say if brokers are buyers or sellers?
The dollar figures shown can be both buy and sell data combined, or just buy and or sell $$ data.
I mentioned moelis as (First time) as I had never seen them before, however they may have been in there at some stage prior? It will be interesting though when full details are shown.
Cheers
Will give you the full breakdown asap.