He quoted the 2 posts you're talking about with a post that had the tripcode. That verified everything.
Goldman is the standout in the derivatives filed
While not the highest amount (only just) they have the least amount of assets backing it's "pile".
https://occ.treas.gov/publications-and-resources/publications/quarterly-report-on-bank-trading-and-derivatives-activities/files/pub-derivatives-quarterly-qtr4-2021.pdf
page 25
$47.95T backed by $4.34B