This is the most recent one linked on their site[1]:

https://assets.ctfassets.net/vyse88cgwfbl/6h4YWqZOXbwtBaPtYg...

Edit: to save people a click, the report shows 125 Billion in assets vs 113 Billion in liabilities. Approx 81 Bil in T-bills

[1]https://tether.to/en/transparency/?tab=reports