Mexican Company Registry Data: How to Search the RPC (2026)

The layers of Mexican company data

Mexican company data is split across a commercial-register layer and a tax layer, with a federal portal trying to unify the first and a single tax authority owning the second. Unlike Luxembourg or the UK, no one body holds the whole picture. Five sources matter for KYB.

The fifth source is the CNBV — the Comisión Nacional Bancaria y de Valores, Mexico's banking and securities regulator. The CNBV authorises and supervises banks, brokerages, investment funds, and other financial institutions, and maintains the public registers of regulated entities and listed-company filings. For any counterparty in the financial sector, the CNBV layer answers a question the RPC cannot: not just whether the company legally exists, but whether it is a licensed, supervised financial institution. Listed companies (the S.A.B. form) also file through the Bolsa Mexicana de Valores and the CNBV's securities registry, the RNV.

Two further sources, both run by the Secretaría de Economía, complete the public picture. The RUG (Registro Único de Garantías Mobiliarias) is a section of the RPC where lenders register movable-asset collateral — Mexico's equivalent of a lien or UCC-style registry; anyone can search it and request certifications online, free, around the clock, making it a direct credit-risk source. The PSM (Publicaciones de Sociedades Mercantiles) is the SE's free electronic gazette, where mercantile publications such as mergers, capital reductions, and dissolution notices must appear — the dated, official feed of corporate-lifecycle events. And on the tax side, SAT publishes a set of public taxpayer “blacklists” that are central to Mexican risk screening; those are covered in their own section below.

Why Mexican company data is fragmented — and tax-led

Two structural facts shape everything about consuming Mexican company data. First, the commercial register is federal in law but state-run in practice. Second, the identifier that actually ties records together is the tax ID, not the register folio. The diagram below shows how the pieces fit — and the key points follow:

• One register, 32 implementations. The RPC is a single legal institution under the Commerce Code, but it is operated by 32 state-level offices. SIGER 2.0 aggregates their folio data into one federal portal, yet how much each state has digitised and uploaded varies — so coverage and depth are genuinely uneven across the country.
• The RFC is the real primary key. A Mexican company cannot bank, invoice, or contract without an RFC. In practice, counterparties, suppliers, and systems identify a company by its RFC far more than by its folio mercantil — making the SAT-issued tax ID the spine of Mexican company identity.
• Ownership is held by the tax authority, not published. The 2022 tax reform requires legal entities to identify and keep records of their beneficiario controlador (controlling beneficiary), but that information sits with SAT and the notary — there is no public beneficial-ownership register. A commercial user cannot pull Mexican UBO data from any official source.
• Notaries are part of the record. Most Mexican companies are incorporated before a notary public (notario) or commercial broker (corredor público), whose instrument is the authoritative constitutive document. The RPC records the act; the notarial protocol holds the detail.
• Tax invoicing creates a parallel data trail. Mexico's mandatory e-invoicing system (CFDI) means SAT holds a near-real-time record of company activity — a data layer with no direct equivalent in most registries, though it is not publicly searchable.

For multi-jurisdiction KYB, Mexico pairs naturally with the United States and Canada — the same federal-plus-state pattern — and the recurring challenge is consistency: confirming you have matched the right entity across a fragmented register, and joining the commercial-register record to the RFC that everything else keys on.

Every Mexican company-data dataset, mapped

Across the RPC, the SIGER portal, SAT, the CNBV, and the supporting registries, fourteen datasets matter for KYB. Mexico's pattern is different from Europe's: a thin but free search tier, a broad band of low-cost paid extracts, and ownership data that is simply not public.

Exactly what data is free, paid & restricted

The free tier covers basic identification and validation. Paid means the certified registral extracts and certificates. Restricted means ownership and tax data the law reserves for SAT, authorities, and the entity itself.

Dataset-by-dataset summary

The same data, viewed by source rather than access tier:

Seven free, four paid, three restricted. Mexico's free tier is broader than it first appears: it confirms a company exists, validates its tax ID, describes the business population (INEGI), flags movable-asset liens (RUG), and — most valuable for risk — screens against SAT's published taxpayer blacklists. The registral substance (certified extracts, encumbrances, registered powers) sits behind modest per-document fees, and the things KYB analysts most want (ownership, controlling beneficiary, full tax records) are simply not public. The constraint here is not a single court ruling, as in Luxembourg, but structural: fragmentation across 32 state offices and a deliberate decision to keep ownership inside the tax authority. Sources: Secretaría de Economía / SIGER / RUG, SAT, INEGI, CNBV (verified June 2026).

The Mexican company identifiers

Mexico's identifiers split cleanly along the register/tax divide. The folio mercantil identifies a company in the commercial register; the RFC identifies it to the tax system — and in practice the RFC does most of the work.

For production Mexican KYB, the RFC is the identifier everything keys on — counterparties, invoices, and systems all reference it, and SAT's service validates it; the folio mercantil resolves the registral file and any certified extract; the CURP matters for matching the people behind the company but is not a public search field; the SCIAN code drives sector analysis; and the LEI connects listed and financial entities into global markets data.

Worked example: América Móvil, S.A.B. de C.V.

To anchor the identifiers and access mechanics in a real record, here is América Móvil — the Carlos Slim-founded telecoms group behind Telcel and Claro, and one of Mexico's largest listed companies, incorporated as a sociedad anónima bursátil de capital variable:

Three things the example surfaces. First, the legal form — S.A.B. de C.V. — tells you immediately this is a listed public company governed by the securities law, not the general companies law, so its disclosures run through the CNBV and the exchange rather than the commercial register alone. Second, even for a household-name listed group, you confirm the entity from public sources but cannot pull its RFC record or its controlling-beneficiary filing — those live inside SAT. Third, the registered office is a real, verifiable data point, but the folio mercantil that identifies its RPC file depends on the state office where it is inscribed — the fragmentation in action.

For contrast, here is the kind of entity that fills most of the register — a privately-held operating company in the most common Mexican form:

How Mexico handles beneficial ownership

The defining ownership development in Mexican company data is the 2022 tax reform, which created a controlling-beneficiary obligation but, crucially, did not create a public register. Treated as a registry-data question — what's available, and to whom — here is what matters.

Effective 1 January 2022, amendments to the Federal Tax Code (Código Fiscal de la Federación) require every legal entity, trust, and certain other parties to identify, verify, and keep up-to-date information on its beneficiario controlador — the controlling beneficiary, broadly the individual who ultimately benefits from or controls the entity. The obligation is enforced through the tax system: notaries gather the information at incorporation, and SAT can demand it at any time, with significant fines for entities that fail to maintain it.

The critical point for KYB is where that data lives. Unlike the EU model — a central beneficial-ownership register that was public and then restricted — Mexico never built a public UBO register at all. The controlling-beneficiary record is held privately by the entity, its notary, and SAT, and is disclosed only to the tax authority on request. There is no portal, no legitimate-interest mechanism, and no commercial access. For an outside party running due diligence on a Mexican company, official ownership data is simply not retrievable from any public source.

For KYB the practical position in 2026 is clear: Mexican company existence can be confirmed and the tax ID validated, but Mexican ownership must be built from other inputs — the notarial deed (if you can obtain it), shareholder declarations, group filings for listed entities via the CNBV, cross-border records, and direct due diligence. The 2022 obligation improved the quality of ownership data that exists inside SAT, but did nothing to make it publicly accessible — arguably the opposite of the transparency direction taken in Europe.

The economy behind the register

To read Mexican company data well, you have to understand the scale and shape of the business population — and the gap between the millions of economic units that exist and the formal commercial-register entities you can actually look up. The numbers that frame it:

The KYB consequence is structural: the headline business-population numbers describe establishments, while the entity you need to verify is a formally registered sociedad identified by its RFC and folio mercantil. Bridging that gap — matching a real counterparty to its registered legal entity across a fragmented, partly-informal landscape — is exactly where consistent, source-attributed data earns its place.

API and bulk data feeds — the four real paths

For production KYB or supplier-verification integrations needing structured Mexican company data at scale, four access paths exist. Mexico does not publish a single free high-volume company-search API — the routes are the SIGER portal, the open-data and validation services, INEGI's directory, and commercial providers.

Path 1 — The SIGER 2.0 portal

The federal SIGER portal at siger.gob.mx supports free per-entity search and access to folio-level registral data, with certified extracts ordered for a fee. It is the closest thing to a national interface, but it is built for human, per-entity lookups behind a captcha, and its coverage reflects whatever each state office has uploaded — not a uniform, programmatic feed.

Path 2 — SAT validation & open data

SAT's RFC validation service confirms a tax ID one identifier at a time, and Mexico's open-data portal datos.gob.mx publishes government datasets — including business and economic data — with no permission or licence required. These are the routes for validating identifiers and pulling open aggregates, though neither is a bulk company-register feed.

Path 3 — INEGI DENUE & Economic Census

INEGI publishes the DENUE establishment directory and the Economic Census as free, bulk-downloadable datasets covering millions of economic units with identification, location, activity (SCIAN), and size. This is the richest open route for the Mexican business population — with the important caveat that DENUE describes establishments, not RPC legal entities, so it complements rather than replaces register data.

Path 4 — commercial multi-jurisdiction APIs and bulk feeds

For teams that need Mexico alongside other countries with a consistent schema and real-time access, commercial providers ingest the official Mexican registry layer and re-expose it through one API — removing the per-state, captcha-gated friction and adding cross-jurisdiction joins. Zephira's Mexican data is sourced directly from the official registry layer, with Data Provenance attribution on every field, and joined to the US, Canada, and 100+ other jurisdictions on a single data model. Bulk delivery via S3 or SFTP is available for batch enrichment and offline analytics. Restricted ownership and tax data is not redistributed.

Mexican entity types — what each one means for KYB

Mexican commercial companies are governed mainly by the Ley General de Sociedades Mercantiles (LGSM), with the listed and investment-promotion forms governed by the securities law (Ley del Mercado de Valores). Six forms account for almost all KYB-relevant records — and the suffix tells you most of what you need to know.

What the Mexican registers don’t tell you

Mexican company data confirms existence and identity well, but for KYB and AML it has real blind spots. Treating the register as the finish line rather than the starting point is the most common mistake on Mexican counterparties. The gaps that matter:

• Ownership is not public at all. There is no public beneficial-ownership register. The controlling-beneficiary record sits inside SAT and the notarial deed; shareholders and partners are named in the constitutive instrument and the company's own ledger. You can confirm the entity, but not its owners, from any official public source.
• Coverage is uneven across 32 states. Because the RPC is implemented state by state, how much is digitised and uploaded to SIGER varies. A company registered in a state with weak digitisation may be hard to find or thinly documented online, even though it is properly registered locally.
• Financial statements are largely private. Unlike the UK or much of the EU, Mexico does not require most private companies to file public annual accounts. Detailed financials for a private S.A. de C.V. are generally not available from the register — only listed S.A.B. issuers disclose through the CNBV and the exchange.
• The RFC is the join, but it isn't a public database. The tax ID everything keys on can be validated one at a time but not searched in bulk — so resolving a name to the correct RFC across similarly-named entities can be genuinely hard.
• Informality and notaries sit outside the portal. A large informal economy means many real businesses never enter the register, and the authoritative incorporation detail lives in the notarial protocol rather than online — so the public record is a pointer, not the full file.

Where the substance actually lives

Because so much sits outside the public portal, it helps to know which source holds which layer of a Mexican company's data. The practical map:

The practical takeaway: for a Mexican counterparty, the public register answers “does this entity exist and what is it,” SAT validation answers “is this tax ID real,” and almost everything about ownership and finances requires either a listed-company disclosure, a certified extract, the notarial deed, or direct due diligence. This is precisely where cross-border, multi-source verification with clear provenance earns its place.

The SAT blacklists — Mexico's core risk-screening source

One free, public, official dataset matters more for Mexican KYB than almost anything in the commercial register: the taxpayer “blacklists” that SAT publishes under the Federal Tax Code. Any serious supplier-onboarding or counterparty check in Mexico screens against them, and they are a far sharper distress signal than formal insolvency filings.

There are two distinct lists, both keyed to the RFC:

• The Article 69-B list (EFOS). SAT publishes — in the Diario Oficial de la Federación and as downloadable files — taxpayers it presumes, and then definitively confirms, to be empresas que facturan operaciones simuladas: companies issuing invoices without the assets, staff, or capacity to back the operations they bill, or that are simply non-located. The fiscal consequence is severe: invoices from a confirmed EFOS taxpayer carry no tax effect, so anyone who deducted them (an “EDOS”) is exposed. A counterparty appearing here is a major red flag.
• The Article 69 list. A broader register of non-compliant taxpayers — those with firm or enforceable tax debts, non-located taxpayers, cancelled taxpayers, those with a criminal tax conviction, and those who have had a tax debt cancelled or forgiven. Searchable by RFC or name and downloadable for bulk screening.

Both are genuinely public and free: you can look up a single RFC or name, or download the full lists from SAT's open-data portal and datos.gob.mx for batch screening, and the EFOS listings are also gazetted in the DOF. Because the formal concurso mercantil caseload is tiny relative to the size of the economy, these blacklists — together with RFC validation and the RUG lien register — do much of the real risk-flagging work on Mexican counterparties. They are also a clear point of differentiation: a Mexican KYB workflow that checks existence and tax-ID validity but ignores the 69-B list is missing the single most actionable public signal Mexico offers.

Where Zephira sources Mexican data from — directly

The most important question for any Mexican company-data provider is the source. Zephira goes direct to the official registry layer, with source attribution on every record — no per-state portal hopping and no aggregator middlemen.

Every record carries a Data Provenance panel naming the specific official source and the timestamp of the last refresh. Controlling-beneficiary records, full RFC and CFDI tax data, and private shareholder detail are not exposed via Zephira — those are held by SAT and the notary and are not publicly available under Mexican law.

Recent and ongoing regulatory developments

Six milestones shape the Mexican company-data landscape from 2009 through 2026. All dates verified from primary sources.

Mexican registry activity — verified primary-source statistics

Two statistical lenses on the Mexican company-data landscape: the scale of the business population that the register sits over, and the small, court-based formal-insolvency caseload that shapes how distress shows up in the data.

The business population

Formal commercial insolvency

Mexican registry data in regional context

How Mexico's access regime compares to other major jurisdictions:

Mexico's defining feature is structural fragmentation: like the US, it has no single national company register, only a state-by-state system with a federal portal layered on top — which puts it closer to the USA and Canada than to the single-register European models. On free basic data it is reasonable: you can confirm existence and validate a tax ID at no cost. On ownership it sits firmly at the closed end — not because a court restricted a once-public register, as in Luxembourg, but because Mexico never built a public beneficial-ownership register at all. For KYB, that makes the Mexican entity findable but ownership and finances the genuinely hard part, on top of the work of matching the right entity across 32 state offices.