Tether Retains 'Major' Audit Firm to Review Stablecoin Reserves

The formal process has been a long time coming. The operator previously announced in March 2025 that it was engaging with a major accounting firm to conduct a comprehensive review. The reserve audit was designated as a top priority at that time and the company explicitly appointed Simon McWilliams as chief financial officer in early 2025 due to his extensive expertise in navigating complex audit processes.

Notable details about the audit remain completely undisclosed including which specific firm - Deloitte, EY, KPMG or PwC - has been retained, and a timeline for publishing the results. It also remains unclear whether the scope strictly covers the full complexity of the global balance sheet including Bitcoin holdings, the secured lending book and the affiliated entity structure.

Historical reluctance and regulatory pressure

The announcement arrives after years of mounting regulatory pressure and persistent scepticism from institutional investors and analysts. The firm has notably faced severe scrutiny over the exact composition of its reserves, its potential exposure to illicit finance and the scope of its operations in markets largely off limits to traditional dollar infrastructure. 

The US Commodity Futures Trading Commission (CFTC) previously fined the operator $41mn in 2021 after finding the company made misleading statements about the underlying assets backing its stablecoin.

The issuer has relied strictly on quarterly attestation reports since 2022 that provided limited snapshots of company reserves without thoroughly examining internal controls, governance practices or long-term financial reporting processes. 

A formal audit from a major accounting firm subjects the operator to far more rigorous scrutiny including independent testing of its systems and the strict quality of its reserve assets. This level of transparency is a standard that rivals including Circle's USD Coin have maintained for years. The upcoming audit is not merely a compliance exercise but rather a move toward accountability, resilience and absolute market confidence, Ardoino added.

Strategic timing and shifting regulations

The timing carries immense strategic significance well beyond basic transparency as the firm navigates an increasingly complex global regulatory landscape. The flagship stablecoin has been effectively delisted from major exchanges across Europe following the introduction of the Markets in Crypto Assets (MiCA) regulation. The sweeping framework requires stablecoin issuers to hold appropriate licensing that the operator has not yet secured, industry data reveals.

Congressional momentum behind the GENIUS Act in the US would impose strict federal standards on stablecoin issuers and has added severe urgency to this credibility drive. The company also recently launched a separate regulated stablecoin issued through Anchorage Digital Bank. That specific product became the first affiliated offering to receive a major attestation when Deloitte signed off on its reserve report in February.

Tether is already operating at the rigorous standards required by major audit firms, McWilliams recently claimed. The broader digital asset industry has grown accustomed to the issuer describing an audit as a top priority with limited subsequent action, making this formal engagement a critical test of execution.