Do you have a citation you can offer up with more solid loss numbers? It looks like Melvin alone has lost at least $4.5 billion dollars on the GME short trade, and Citadel/Point72 provided ~$2.75 billion in capital to Melvin.
> Short-selling hedge funds have suffered a mark-to-market loss of $19.75 billion year to date in the brick-and-mortar video game retailer GameStop, according to data from S3 Partners.
Doesn't attribute losses to specific firms, but the damage is spectacular.