Tether appoints Big Four firm for first full audit

Tether has signed a Big Four accounting firm to conduct its first full independent financial statement audit. The engagement covers the issuer of USD₮, the world's largest stablecoin by market value.

The move takes Tether beyond the periodic attestations standard among stablecoin issuers and into a broader review of its accounts, reserves, internal controls and financial reporting. Tether did not name the audit firm, but said the formal engagement followed an onboarding process that ended a few weeks ago.

During that initial process, audit firms reviewed Tether's systems and controls and worked with a broad set of stakeholders. Several firms took part, reflecting the size of the assignment and Tether's position in the digital asset market.

USD₮ has a market capitalisation of more than USD $184 billion, according to Tether, and its user base exceeds 550 million globally. That scale has long kept the group under scrutiny over the composition of its reserves and the extent of independent oversight of its balance sheet.

Audit shift

A full audit is more extensive than an attestation, which typically tests whether management's claims align with selected information at a given point in time. By contrast, a financial statement audit examines a broader range of records, controls and accounting judgements across a reporting period.

For Tether, the decision addresses one of the most persistent questions around stablecoins: whether issuers can provide independent evidence that tokens in circulation are matched by assets that can be realised when users redeem them. The company said the audit would provide greater visibility into the strength and position of its reserves.

Tether also said it has retained earnings within its wider group rather than distributing profits, leaving capital available to support USD₮. Those resources are held in affiliated proprietary holding companies, which it said provide additional balance sheet flexibility.

As part of its reserve management process, Tether said it would move listed securities over the coming days. The announcement did not give further details on the value, destination or exact composition of those holdings.

Market pressure

Stablecoin issuers face growing demands from regulators, trading venues and institutional users to provide more detailed evidence about reserves, governance and risk controls. Those demands have intensified as stablecoins have become a larger part of crypto market infrastructure and cross-border payments.

Tether remains the dominant issuer in that market, making its reporting practices especially significant for counterparties and policymakers. A completed audit by a major international accounting network would mark a notable step for a business that has historically faced criticism for limited disclosure compared with mainstream finance.

Tether said it had spent years strengthening internal systems, expanding governance arrangements and improving financial controls in preparation for the review. It also pointed to the appointment of chief financial officer Simon McWilliams in early 2025 as a key part of that effort.

McWilliams said the firm was chosen through a competitive process. "The Big Four Firm was selected through a competitive process because the organisation is already operating at Big Four audit standard; the audit will be delivered," he said.

Executive remarks

Chief Executive Paolo Ardoino said the work was intended to reinforce confidence in the token and the company's systems.

"Tether's mission has always been to build trust through action, not promises. Trust is built when institutions are willing to open themselves fully to scrutiny. This audit represents years of work to strengthen our systems so that Tether can meet the highest standards applied in global finance. For the hundreds of millions of people and businesses who rely on USD₮ every day, this audit is not just a compliance exercise; it is about accountability, resilience, and confidence in the infrastructure they depend on," Ardoino said.

The group also highlighted its record of publishing reserve updates, working with law enforcement on illicit activity and maintaining compliance and risk systems around USD₮. Those points form part of a broader effort to present itself as a more transparent and closely supervised operator as digital asset markets mature.

The identity of the audit firm, the expected timetable for completion and the reporting period to be covered have not been disclosed. What is clear is that Tether has now committed to a deeper external examination of the balance sheet behind more than USD $184 billion of tokens in circulation.