Deloitte & Touche LLP
Big Four accounting firm; in this wiki, Deloitte appears as Circle's independent auditor (since fiscal 2022) and as the third-party attestor on Circle's monthly USDC reserve attestation reports.
What it is
Deloitte & Touche LLP is one of the four largest global accounting firms. For this wiki's purposes, Deloitte's role is as Circle's independent auditor since fiscal 2022 and as the third-party attestor on Circle's monthly USDC reserve attestation reports. Attestations are prepared according to attestation standards set by the American Institute of Certified Public Accountants (AICPA).
The institutional-buyer significance of having a Big Four audit firm specifically (rather than a mid-tier or specialty firm) is structural: Big Four firms operate under heavier regulatory scrutiny themselves (SEC inspections, PCAOB oversight), have insurance and reputational stakes that align with audit quality, and produce attestation reports that institutional procurement teams can evaluate against familiar quality benchmarks.
For the wiki, Deloitte is currently a single-relationship firm (auditor-of-Circle). Future sources covering other digital-asset vendor audits performed by Deloitte (or covering audit-firm switches) could substantively develop this page.
How it shows up in sources
- Circle USDC Transparency & Reserves (public page, fetched April 2026) — named as Circle's independent auditor since fiscal 2022, replacing Grant Thornton LLP (which served from 2015). Performs the monthly third-party attestations under AICPA standards.
Vendors / people associated
- Circle — Deloitte is Circle's independent auditor and produces the monthly third-party attestations on USDC reserves.
Concepts associated
- Proof of reserves — Deloitte's monthly attestations are the third-party-assurance component of Circle's reserve disclosure regime.
- Citation discipline — AICPA-standard attestations are a canonical example of citation discipline at the audit-firm layer.
- Counterparty-graph research — Deloitte is one of Circle's named counterparties.
Open questions
- Other Big Four firms in the digital-asset stablecoin / custody / tokenization space — KPMG, EY, PwC. The wiki currently has only Deloitte. Future source ingests covering other vendors' attestation regimes would surface these comparators.
- AICPA attestation standard specifics — there is a standard family (AT-C 105, AT-C 205, AT-C 215, etc.) used for stablecoin reserve attestations. The current source describes the regime generically; a future ingest of an actual attestation report could substantively develop the AICPA-standard concept.