Tether said Thursday that Big Four accounting firm KPMG issued an unqualified audit opinion—industry jargon for the best possible result—-on the 2025 financial statements of Tether International, the company behind the world’s largest stablecoin USDT. In a post announcing the audit, Tether called the review the “largest inaugural financial audit in history,” saying KPMG examined Tether’s assets, liabilities, income, cash flows, internal systems, records, counterparties, and supporting documentation.