Registro Mercantil: The Complete Guide to Spanish Company Registry Data in 2026
Spain is the fourth-largest economy in the EU and home to over 3.25 million active companies. Every commercial entity must register with the Registro Mercantil, Spain's official commercial registry. The data is legally public. Getting it into a production KYB workflow is a different matter entirely.
Spain's registry covers directors, share capital, and annual accounts well. But there is no official API, all documents are in Spanish, and — critically — share transfers in an S.L. after incorporation are not required to be publicly registered. A company incorporated in 2015 could have changed hands twice since then. The registry would still show the original founders.
Spain launched a central UBO register (RCTIR) in September 2023. Access for foreign institutions remains burdensome — even after the July 2025 update for obliged entities. This guide covers everything compliance, data, and product teams need to work with Spanish company data in 2026.
| 3.25M+ Active enterprises | 52 Provincial registries | Sep 2023 RCTIR UBO register | No API No official free REST API |
How the Registry is Structured
The Registro Mercantil is decentralised across 52 provincial offices. The Registro Mercantil Central (RMC) in Madrid acts as the national index — handling name reservations and coordinating provincial registries. Managed by the College of Registrars (Registradores de España) under the Ministry of Justice.
Access via sede.registradores.org. Basic searches free, no account needed. Documents require payment. Portal has partial English navigation — all official documents are Spanish-only.
Key identifiers
NIF — one letter + eight digits (e.g. B12345678). Primary identifier across all registry and tax systems. Replaced the CIF in 2008 — same number, different label. Systems treating NIF and CIF as separate identifiers create duplicate records. · IRUS — registry's own unique ID for precise document retrieval. · CNAE — Spain's NACE-equivalent industry code, self-declared at incorporation.
Entity Types and What Each Means for Data
The legal form determines what data is publicly available. The most important distinction: S.L. has a post-incorporation share transfer gap; S.L.U. discloses its single owner.
| Entity | Min. capital | Shareholders public? | Accounts |
|---|---|---|---|
| S.L. — Sociedad Limitada | €3,006 | Founding deed only | Mandatory (simplified if <€2M) |
| S.A. — Sociedad Anónima | €60,000 | Not public | Mandatory (full) |
| S.L.U. — Single-member S.L. | €3,006 | Single member disclosed | Mandatory |
| S.A.U. — Single-member S.A. | €60,000 | Single member disclosed | Mandatory (full) |
| Sucursal — Foreign branch | — | Parent entity disclosed | Parent accounts filed |
Why S.L.U. matters for KYB
An S.L.U. must disclose its single member in the Registro Mercantil — one of the few Spanish entity types where the current owner is verifiable from public registry data alone. The S.L.U. designation in a Nota Informativa is a meaningful signal: one owner, named.
Chart
Spanish companies by entity type (2024)
| S.L. |
|
72% | ||
| Most common. Share transfers NOT publicly registered after incorporation. | ||||
| S.L.U. |
|
14% | ||
| Single member disclosed — best transparency of any S.L. variant. | ||||
| S.A. |
|
8% | ||
| Listed and large companies. Shareholder register private. | ||||
| Other |
|
6% | ||
| Branches, partnerships, cooperatives. | ||||
86% of all Spanish entities (S.L. + S.A.) have the share transfer gap — post-incorporation ownership changes are not in the public registry.
What the Registry Contains
| Data type | Available? | Source & cost |
|---|---|---|
| Company name, legal form, status | Yes — free | sede.registradores.org |
| NIF / IRUS / registration date / province | Yes — free | Free search |
| Directors & legal representatives | Yes | Nota Informativa · ~€0.60/registration |
| Share capital (subscribed & paid) | Yes | Nota Informativa · ~€0.60 |
| Annual accounts (last 3 years) | Yes (where filed) | Depósito de Cuentas · ~€0.60/year |
| BORME corporate events | Yes — free | boe.es/diario_borme · daily |
| Shareholders (at incorporation) | Founding deed only | Escritura de constitución — paid |
| Share transfers after incorporation | Not public | Not filed with Registro Mercantil |
| Insolvency proceedings | Yes — free | BORME + REFOR (refor.registradores.org) |
| UBO / beneficial owners | Restricted | RCTIR (separate register) · legitimate interest |
Document Costs
The Nota Informativa Mercantil is Spain's primary KYB document. Modular — pay per section. No account required. Credit card accepted. Delivered digitally in minutes. All documents in Spanish.
| Document / section | Cost | Use case |
|---|---|---|
| Basic data — name, NIF, address, CNAE, status | ~€2.10 | Entity verification, onboarding |
| Share capital | ~€0.60 | KYB, credit |
| Directors & attorneys-in-fact | ~€0.60/registration | KYB, signing authority |
| Annual accounts (Depósito de Cuentas) | ~€0.60/year | Financial due diligence |
| Full excerpt (all sections) | ~€3–5 | Full KYB pack |
| Certified certificate (Certificación) | €6–24 | Notarial / regulatory submissions |
| BORME search | Free | Latest corporate events |
| REFOR insolvency check | Free | Bankruptcy / restructuring screening |
Open Data and Bulk Access
For data teams building pipelines rather than per-entity KYB workflows, Spain offers limited but usable open data. The key constraint: Spain has no free structured API equivalent to France’s Sirene or the UK’s Companies House API. Everything at scale requires either the BORME XML feed, a formal data agreement, or a third-party provider.
| Source | Data available | Update freq. | Cost | Limitations |
|---|---|---|---|---|
| RM open data portal | NIF, company name, registration location, legal form | Quarterly | Free | No directors, no accounts, no status — entity list only |
| BORME full-text feed | All corporate event publications (XML available) | Daily | Free | Unstructured — requires parsing; no entity-level API |
| INE (Instituto Nacional de Estadística) | DIRCE company statistics — counts by size, sector, region | Annual | Free | Statistical only — no individual entity data |
| AEAT open data | Aggregated tax data by sector and size band | Annual | Free | Statistical only — no individual NIF data |
| RMC bulk agreement | Full Registro Mercantil dataset including documents | Ongoing | Commercial contract | Requires signed agreement with the RMC; Spanish entity preferred |
Bottom line for data teams
Spain’s open data offering is thin compared to France (Sirene API) or the UK (Companies House bulk data). The quarterly RM extract and daily BORME feed are useful starting points but insufficient for production enrichment or KYB pipelines. For structured, entity-level Spanish company data at scale — including directors, accounts, and BORME history — a formal data agreement or third-party provider is required.
The Shareholding Transparency Gap
In a Spanish S.L. — Spain's most common entity — share transfers after incorporation are not required to be registered with the Registro Mercantil. The founding shareholders appear in the escritura de constitución (publicly accessible). But when shares are sold via notarial deed, that transaction is not publicly filed.
A company incorporated in 2015 could have changed hands entirely in 2022. The Nota Informativa would still show the original founders. This is structural — not a data quality failure — and makes Spain the least transparent major EU jurisdiction for current share ownership.
Spain vs other EU registries
Germany requires GmbH shareholder lists to be filed with each change. France files SAS statuts with INPI. The UK requires all PSC changes at Companies House. The Netherlands records the main shareholder in every KVK extract. Spain does none of these for S.L. post-incorporation transfers.
Chart
Registry data transparency — EU comparison
Composite: free access · API · UBO access · share transfer transparency · language
| 🇬🇧 UK |
|
9.0 / 10 | ||
| Free API · PSC public · all share changes filed · English | ||||
| 🇫🇷 France |
|
7.0 / 10 | ||
| Free Sirene API · UBO restricted · SAS transparency gap · French only | ||||
| 🇳🇱 Netherlands |
|
6.0 / 10 | ||
| Paid API (NL entity required) · holding BV opacity · UBO restricted | ||||
| 🇩🇪 Germany |
|
5.5 / 10 | ||
| Free access (2022) · no API · 60 req/hr limit · scanned PDFs · UBO restricted | ||||
| 🇪🇸 Spain |
|
3.5 / 10 | ||
| No API · S.L. share transfer gap · RCTIR access burdensome · Spanish only | ||||
The KYB Workflow for a Spanish Company
Chart
Effort required by data source
Bar length = effort · colour = difficulty
| BORME | Free · 2 min | |||
| REFOR | Free · 2 min | |||
| Nota Informativa | €2–5 · 10 min | |||
| Annual accounts | €0.60/yr | |||
| RCTIR — UBO | Months · eID | |||
| Corporate linkage | Specialist | |||
|
|
|
How to Search the BORME
The BORME at boe.es/diario_borme is free, updated daily, and covers every corporate event published since 1990. Here’s how to get the most out of it:
1 |
Search by NIF, not company name NIF searches return exact matches. Company name searches can miss results if the legal name differs from the trading name. Always search by NIF first. |
2 |
Filter by section BORME Section A covers individual traders; Section B covers companies. For KYB on legal entities, filter to Section B to reduce noise. |
3 |
Look for act types Key act types to flag: Declaración de concurso (insolvency opening), Disolución (dissolution), Cambio de administradores (director change), Reducción de capital (capital reduction). These are the highest-signal events for KYB and credit decisions. |
4 |
Check publication date vs event date BORME publications typically lag the underlying registry event by 1–3 days. An insolvency filing made on Monday may not appear in BORME until Wednesday. For time-sensitive decisions, call the relevant provincial registry directly to confirm same-day status. |
5 |
Download the XML feed for bulk monitoring The BORME publishes a daily XML file at boe.es containing all acts for that day. For monitoring a portfolio of Spanish entities, this XML feed — parsed against your entity list by NIF — gives you same-day alerts on any corporate event across your entire book. |
Step-by-step
1 |
Check the BORME first — free, daily Go to boe.es/diario_borme and search by NIF. Two minutes. Reveals director changes, capital reductions, dissolutions, insolvency openings — before they appear in the Nota Informativa status field. |
2 |
Run the REFOR insolvency check — free refor.registradores.org. A company can show as active in the Nota Informativa while already in insolvency proceedings. Non-negotiable for credit and supply chain decisions. |
3 |
Retrieve the Nota Informativa At sede.registradores.org, search by NIF, select Publicidad Mercantil → Company Excerpt. Choose sections, pay by card. Directors, capital, BORME history, accounts status. No account required. All documents in Spanish. |
4 |
Review annual accounts Companies must file within 7 months of financial year end. Non-filing for 12+ months leads to being struck off. S.L. companies under €2M turnover file simplified accounts only. |
5 |
Address the shareholding gap Founding shareholders appear in the incorporation deed. Post-incorporation transfers are not public. Use RCTIR access if eligible, or corporate linkage analysis to trace the ownership chain. |
The RCTIR — Spain's UBO Register
Spain launched the Registro Central de Titularidades Reales (RCTIR) in September 2023 under Royal Decree 609/2023. It consolidates UBO data from the Registro Mercantil, Foundations Register, Associations Register, and the Notaries' General Council. The UBO threshold is 25% ownership or voting rights.
Since February 2025, companies filing Form 036 for corporate changes must include UBO data. In July 2025 the Ministry of Justice enabled access for AML-obliged entities. Public access requires demonstrated legitimate interest — in Spanish, with a Spanish eID.
Access in practice
Transparency International's Spanish subsidiary applied in August 2024. They received access in February 2025 — six months later. What you receive: UBO name, birth month/year, country of residence, nationality, and nature of control. No shareholding percentages. No full date of birth.
| Who | Access level | Method |
|---|---|---|
| Spanish AML-obliged entities | Full — since Jul 2025 | RCTIR portal + digital cert |
| Competent authorities (AEAT, SEPBLAC) | Full | Direct system access |
| Journalists / civil society (AML mandate) | Presumed legitimate interest | RCTIR — Spanish documentation |
| Foreign obliged entities | Enabled Jul 2025 — burdensome | Spanish eID or digital cert required |
| General public | Restricted (ECJ ruling) | Legitimate interest — case by case |
Spain’s Insolvency Framework
Spain reformed its insolvency law significantly with the TRLC (Texto Refundido de la Ley Concursal) in 2020 and further in 2022, introducing pre-insolvency mechanisms aligned with the EU Restructuring Directive. Understanding the framework matters because different stages generate different registry signals — and a company can be in serious distress long before it appears as insolvent in the Nota Informativa.
| Procedure | What it means | Where it appears | Signal |
|---|---|---|---|
| Comunicación art. 583 TRLC | Pre-insolvency notice — company has 3 months to negotiate with creditors before filing | REFOR only | Early warning — distress but not yet insolvent |
| Concurso de acreedores | Full insolvency proceedings — equivalent to administration or Chapter 11 | BORME + REFOR | High risk — trading may continue under court supervision |
| Concurso consecutivo | Insolvency following failed restructuring — typically leads to liquidation | REFOR | Terminal — liquidation likely |
| Liquidación | Asset liquidation and dissolution | BORME + Registro Mercantil | Company ceasing operations |
| Disolución por falta de depósito | Administrative strike-off for non-filing of annual accounts (3+ years) | BORME | Dormant or abandoned — not necessarily insolvent |
REFOR vs BORME — the critical distinction
The BORME publishes the opening of concurso proceedings and the appointment of insolvency administrators. The REFOR contains the full procedural record — case number, court, current phase, administrator details, and any restructuring plan. For credit decisions, always check both: BORME for recent filings, REFOR for full status. A company can have its concurso opened and the BORME publication can appear 2–5 days before the REFOR record is updated.
Common Mistakes
1. Treating founding shareholders as current shareholders
The most dangerous mistake in Spanish KYB. The Nota Informativa shows the original shareholders from the incorporation deed. Any transfers since then are not in the public registry. Structurally wrong for any S.L. more than a few years old.
2. Treating NIF and CIF as different identifiers
Same number, different label. A pipeline that stores both separately creates duplicate records for every Spanish company registered before 2008. Always normalise to NIF.
3. Trusting Nota Informativa status without a BORME check
The status field can lag corporate events by days. A company can be published in the BORME as dissolved while its Nota Informativa still shows active. Always check the BORME first — it's free.
4. Skipping the REFOR for credit decisions
A company can file a pre-insolvency communication (art. 583 TRLC) — an early warning it is in distress — and this appears in the REFOR before any BORME publication. A REFOR check at refor.registradores.org is non-negotiable for any credit decision.
5. Missing the provincial registry structure
Spain has 52 provincial Registro Mercantil offices. A company's record is held by the registry in the province of its registered address. If a company moves provinces, its file moves too — creating historical records in the old province and current records in the new one.
6. Relying on CNAE codes for sub-sector precision
CNAE codes are self-declared at incorporation and infrequently updated. For broad sector filters CNAE is reliable. For sub-sector precision, supplement with web-derived signals.
Chart
CNAE code reliability by use case
| Use case | Reliability |
|---|---|
| Broad sector classification Manufacturing vs services vs finance | HIGH |
| Regulated sectors Finance, pharma, energy — strong incentive to file correctly | HIGH |
| NACE cross-border mapping CNAE aligns with NACE Rev. 2 — 4-digit codes map 1:1 | MEDIUM |
| Sub-sector precision Software vs IT consulting — generic codes (6201, 6202) common | LOW |
| Real-time activity verification Company pivots may never update CNAE | LOW |
Regulatory Timeline
| Nov 2022 | ECJ ruling ends public UBO access Court of Justice rules mandatory public UBO access violates fundamental rights. Spain begins restricting general access. |
| Sep 2023 | RCTIR launches — Spain's central UBO register Royal Decree 609/2023. All Spanish entities required to submit UBO data. Daily updates required. |
| Feb 2025 | Form 036 UBO expansion All companies filing Form 036 for corporate changes must now include beneficial ownership information. |
| Jul 2025 | RCTIR access enabled for obliged entities Ministry of Justice officially enables RCTIR access for AML-obliged entities. |
| 2026–27 | EU AMLA + 6AMLD harmonisation BORIS interconnection links RCTIR to all EU UBO registers. Legitimate interest access enforced across member states. |
How Zephira Solves the Spanish Data Problem
Zephira connects directly to the Registro Mercantil, BORME, and supporting Spanish sources, normalises everything into a unified entity model, and delivers via REST API or bulk file — in English, no per-document fees, no Spanish-language interpretation required.
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🔍
Share transfer coverage
Post-incorporation ownership gap supplemented through corporate linkage and RCTIR data.
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🏛
Government-sourced
Direct from Registro Mercantil and BORME. No third-party resale. Updated as filings occur.
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🇬🇧
English output
All documents delivered as structured English-language fields.
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API or bulk
REST API · 99.9% SLA · no rate limits. Or bulk via S3 or SFTP.
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Cross-border linkage
Spanish entities linked to parents and subsidiaries across 150+ jurisdictions.
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📊
Firmographic enrichment
Revenue estimates, employee bands, CNAE codes, credit signals.
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ZEPHIRA.AI · GLOBAL INTELLIGENCE LAYER
Beyond Spain: Global Registries, Corporate Linkage & Enrichment
The Registro Mercantil tells you a company exists and who its directors are. It does not tell you who owns it today, whether the parent is a Luxembourg fund, or what the group generates in revenue. Zephira connects directly to 150+ government registries worldwide and traces ownership chains using official data at each layer.
Where companies file only simplified accounts, Zephira appends revenue estimates, employee bands, and financial health signals. Available via REST API or bulk delivery via S3 or SFTP.
See the full data model →
Spain is part of Zephira’s EU registry coverage. Each guide covers the registry structure, data availability, document costs, UBO access, and KYB workflow specific to that jurisdiction.
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Germany
150 courts, no official API, scanned PDFs, restricted UBO.
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🇫🇷
France
Free Sirene API, Kbis extracts, SAS transparency gap.
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🇳🇱
Netherlands
Holding BV structures, paid API, UBO Q2 2026.
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Frequently Asked Questions
What is the Registro Mercantil in Spain?
▼
Spain's official commercial registry, managed by the College of Registrars under the Ministry of Justice. Every Spanish commercial entity must register. 52 provincial registries coordinated by the RMC in Madrid. Access via sede.registradores.org.
What is the NIF and how does it differ from the CIF?
▼
The NIF replaced the CIF in 2008 — same number, different label. Format: one letter plus eight digits (e.g. B12345678). The letter indicates entity type: B for S.L., A for S.A. Any system treating NIF and CIF as separate identifiers creates duplicate records.
What is a Nota Informativa Mercantil?
▼
Spain's standard company extract — the primary KYB document. Contains name, NIF, address, legal form, share capital, directors, BORME history, and last 3 years of accounts. Modular: ~€2.10 for basic data, ~€0.60 per additional section. Available at sede.registradores.org. No account required. All documents in Spanish.
Why can't I find current shareholders for a Spanish S.L.?
▼
Structural feature of Spanish corporate law. Share transfers in a Spanish S.L. are formalised through a notarial deed but not required to be registered in the Registro Mercantil. Founding shareholders appear in the incorporation deed — any subsequent transfer is invisible from public registry data. The only path to current beneficial ownership is the RCTIR register.
Can I access UBO data for Spanish companies?
▼
Spain's RCTIR launched September 2023. Access for AML-obliged entities enabled July 2025. Public access requires demonstrating legitimate interest — in Spanish, with a Spanish eID. Transparency International Spain took six months to be granted access. What you receive: UBO name, birth month/year, country of residence, nationality, and nature of control. No shareholding percentages.
What is the BORME and why does it matter for KYB?
▼
Spain's official commercial gazette, published daily at boe.es/diario_borme. Free. Records all corporate events: incorporations, director changes, capital modifications, dissolutions, insolvency. Corporate events appear here before they are reflected in the Nota Informativa status field — always check the BORME first.
Does Spain have a free company data API?
▼
No. Spain has no official free REST API for company data, unlike the UK's Companies House API or France's Sirene API. The Registro Mercantil's open data portal provides quarterly extracts — NIF, name, and registration location only. The BORME is free but a publication feed, not an API. For production-grade data, a third-party provider is required.
What is the REFOR and when should I use it?
▼
The REFOR (Registro Público Concursal) at refor.registradores.org is Spain's public insolvency register. Free. Records all bankruptcy (concurso de acreedores), payment suspension, and debt restructuring proceedings. A company can appear active in the Nota Informativa while already in insolvency. Non-negotiable for credit, supplier onboarding, or counterparty risk decisions.
What entity types are registered in the Registro Mercantil?
▼
S.L. (Sociedad Limitada) — most common, minimum capital €3,006; S.A. (Sociedad Anónima) — listed and large companies, min. €60,000; S.L.U. and S.A.U. — single-member variants where the owner is disclosed; partnerships; and branches of foreign companies. The S.L. is the dominant form and has the most significant shareholding transparency gap.
What is the full KYB workflow for a Spanish company?
▼
(1) BORME check — free; (2) REFOR insolvency check — free; (3) Nota Informativa — directors, capital, status; (4) Annual accounts via Depósito de Cuentas; (5) Shareholder/UBO determination via RCTIR or corporate linkage; (6) Sanctions, PEP, and adverse media screening. Steps 1–4 are automatable via the Zephira API.
Get structured Spanish company data via API
Registro Mercantil, BORME, Depósito de Cuentas — normalised, enriched, English output.
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Real-time · 99.9% SLA · No rate limits · JSON
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