United States Business Registry (SEC EDGAR & State SOS Registries) & Open Business Companies Data: SEC CIK (10-digit), State SOS File Number & IRS EIN, Official Portals & Master Data

What You Need to Know at a Glance: United States Business Registry & Company Master Data (SEC EDGAR & State SOS Registries)

Official business registration in United States is governed through SEC EDGAR (U.S. Securities and Exchange Commission) & 50-State Secretary of State (SOS) Business Registries, which maintains core legal-entity records indexed by SEC CIK (10-digit), State SOS File Number & IRS EIN. To build a complete institutional picture in United States, analysts cross-reference 14 verified official portals administered by official regulator, official federal procurement/entity source, official GSA API, official federal open data. Primary legal-entity lookup routes include California Business Search (bizfileonline.sos.ca.gov, official state registry) and Delaware entity search (official state registry).

Complementing the primary register at SEC EDGAR & State SOS Registries, United States maintains specialized public portals for fiscal and taxpayer registration via IRS Tax Exempt Organization Search (official tax authority); open data catalogues and statistical business frames through SAM Entity/Exclusions Extract APIs (official GSA API) and Data.gov (official open data); financial supervision, capital-market disclosures, and LEI records from SEC EDGAR APIs (sec.gov, official regulator) and data.sec.gov (data.sec.gov, official regulator); public procurement notices, official gazettes, and intellectual-property registers such as Entity Information (official federal procurement/entity source) and SAM.gov Entity Management API (official GSA API).

How the Official United States Business Registry (SEC EDGAR & State SOS Registries) & Public Data Ecosystem Work

The strongest route is state business registries for private-company legal existence, SEC EDGAR for reporting companies, SAM.gov and USAspending for federal contractors and award recipients, IRS exempt-organization data, USPTO trademark data, OFAC sanctions screening and FinCEN BOI as a restricted non-public compliance boundary. That makes United States a decentralized federal-and-state source map, not a single national company-house register, but it does not remove the usual reuse checks: dataset terms, attribution, no-endorsement language, privacy, marketing-law boundaries and source freshness.

For practical work, the most useful source stack is: SEC EDGAR APIs, data.sec.gov, SEC Developer Resources, SAM.gov Entity Information, SAM.gov Entity Management API, SAM Entity/Exclusions Extract APIs.

The United States does not have a single public national company register for private companies. LLCs, corporations and many partnerships are formed or qualified through state and territory authorities. A useful US company dataset is therefore a registry-stitching project, not a single-source download.

The practical CompaniesData model should treat each state registry as an authoritative shard. Federal layers such as SEC, SAM.gov, USAspending, IRS TEOS, USPTO, OFAC and FinCEN add useful facts only when the entity appears in that federal population.

Official United States Business Registry, Company Data API & Master Data Portals (14 Verified Sources)

Core Corporate Registry, Entity Lookup & Statutory Filings

California Business Search bizfileonline.sos.ca.gov — official state registry

Data & Access: High-volume state example for entity verification.

Terms & Operational Scope: California Secretary of State terms. California-only; terms and fields differ by state.

Delaware entity search — official state registry

Data & Access: Important incorporation state example.

Terms & Operational Scope: Delaware Division of Corporations terms. Search is state-specific and not a full national API.

OFAC Sanctions Search — official sanctions authority

Data & Access: Restricted-party screening and compliance context.

Terms & Operational Scope: US Treasury terms. Compliance list, not a company register.

FinCEN BOI fincen.gov — official financial-crimes authority

Data & Access: Compliance caveat for beneficial ownership boundaries.

Terms & Operational Scope: restricted; not public open data. Beneficial ownership information is not a public open company database.

Tax Authority, Fiscal Registration & Customs Identifiers

IRS Tax Exempt Organization Search — official tax authority

Data & Access: Nonprofit and exempt-organization entity context.

Terms & Operational Scope: IRS public information terms. Tax-exempt organizations only.

National Open Data Portals, Bulk Feeds & Statistical Agencies

SAM Entity/Exclusions Extract APIs — official GSA API

Data & Access: Public entity and exclusions extracts for compliance workflows.

Terms & Operational Scope: FOIA/public extract and CUI boundaries. Sensitive fields and non-public extracts are restricted.

Data.gov — official open data

Data & Access: Discovery layer for federal, state, local and tribal datasets.

Terms & Operational Scope: dataset-specific US government terms. Catalogue, not the authority for each state registry.

Central Bank, Financial Supervision, Capital Markets & LEI

SEC EDGAR APIs sec.gov — official regulator

Data & Access: Public filer submissions, company facts, XBRL and listed/reporting-company enrichment.

Terms & Operational Scope: SEC fair-access and website terms. Reporting companies only, not all US businesses.

data.sec.gov data.sec.gov — official regulator

Data & Access: Machine-readable SEC company facts and submissions data.

Terms & Operational Scope: SEC fair-access and request-rate guidance. Requires fair-access headers and moderate request rates.

SEC Developer Resources sec.gov — official regulator

Data & Access: Technical and lawful-use context for SEC data consumption.

Terms & Operational Scope: SEC terms and fair-access policy. Policy/guidance layer rather than a company registry.

Public Procurement & Intellectual Property Registers

Entity Information — official federal procurement/entity source

Data & Access: Federal contractors, entity registrations and exclusions context.

Terms & Operational Scope: SAM.gov terms and FOIA/CUI boundaries. Federal procurement population, not a complete business universe.

SAM.gov Entity Management API — official GSA API

Data & Access: Programmatic entity lookup for SAM.gov registered entities.

Terms & Operational Scope: GSA/SAM API terms and CUI restrictions. Access and fields vary by authorization and data sensitivity.

USAspending API — official federal open data

Data & Access: Award recipients, contracts, grants and federal-spending enrichment.

Terms & Operational Scope: USAspending/public federal data terms. Award-recipient layer, not all US companies.

USPTO Trademark Search — official IP authority

Data & Access: Trademark owner and brand enrichment.

Terms & Operational Scope: USPTO terms and dataset-specific notices. IP layer, not company master data.

Complete Comparison Matrix: United States Business Registry (SEC EDGAR & State SOS Registries), Company Master Data & Open Data APIs

Official Source	Issuing Authority	Access & Data Provided	Reuse & Licensing	Operational Scope & Boundaries
SEC EDGAR APIs sec.gov	official regulator	Public filer submissions, company facts, XBRL and listed/reporting-company enrichment.	SEC fair-access and website terms	Reporting companies only, not all US businesses.
data.sec.gov data.sec.gov	official regulator	Machine-readable SEC company facts and submissions data.	SEC fair-access and request-rate guidance	Requires fair-access headers and moderate request rates.
SEC Developer Resources sec.gov	official regulator	Technical and lawful-use context for SEC data consumption.	SEC terms and fair-access policy	Policy/guidance layer rather than a company registry.
Entity Information	official federal procurement/entity source	Federal contractors, entity registrations and exclusions context.	SAM.gov terms and FOIA/CUI boundaries	Federal procurement population, not a complete business universe.
SAM.gov Entity Management API	official GSA API	Programmatic entity lookup for SAM.gov registered entities.	GSA/SAM API terms and CUI restrictions	Access and fields vary by authorization and data sensitivity.
SAM Entity/Exclusions Extract APIs	official GSA API	Public entity and exclusions extracts for compliance workflows.	FOIA/public extract and CUI boundaries	Sensitive fields and non-public extracts are restricted.
USAspending API	official federal open data	Award recipients, contracts, grants and federal-spending enrichment.	USAspending/public federal data terms	Award-recipient layer, not all US companies.
Data.gov	official open data	Discovery layer for federal, state, local and tribal datasets.	dataset-specific US government terms	Catalogue, not the authority for each state registry.
California Business Search bizfileonline.sos.ca.gov	official state registry	High-volume state example for entity verification.	California Secretary of State terms	California-only; terms and fields differ by state.
Delaware entity search	official state registry	Important incorporation state example.	Delaware Division of Corporations terms	Search is state-specific and not a full national API.
IRS Tax Exempt Organization Search	official tax authority	Nonprofit and exempt-organization entity context.	IRS public information terms	Tax-exempt organizations only.
USPTO Trademark Search	official IP authority	Trademark owner and brand enrichment.	USPTO terms and dataset-specific notices	IP layer, not company master data.
OFAC Sanctions Search	official sanctions authority	Restricted-party screening and compliance context.	US Treasury terms	Compliance list, not a company register.
FinCEN BOI fincen.gov	official financial-crimes authority	Compliance caveat for beneficial ownership boundaries.	restricted; not public open data	Beneficial ownership information is not a public open company database.

Operational Scope, Access Workflows & What Is Missing from Public United States Registry Records

Start with the jurisdiction of formation or qualification for private companies, then add federal layers only when the entity belongs to that population: SEC EDGAR for reporting companies, SAM.gov for federal procurement registration, USAspending for awards, IRS TEOS for exempt organizations, USPTO for trademarks and OFAC for restricted-party screening.

The US open-company-data article supports the company-database sales motion, but it must not blur official records with marketing lists. A secretary-of-state record, SEC filing, SAM registration, award recipient record, trademark owner record or sanctions-list entry can help verify a company. It does not grant permission to email or call that company.

• Best starting point: state business registries for private-company legal existence, SEC EDGAR for reporting companies, SAM.gov and USAspending for federal contractors and award recipients, IRS exempt-organization data, USPTO trademark data, OFAC sanctions screening and FinCEN BOI as a restricted non-public compliance boundary.
• Core source stack: SEC EDGAR APIs, data.sec.gov, SEC Developer Resources, SAM.gov Entity Information, SAM.gov Entity Management API, SAM Entity/Exclusions Extract APIs.
• Formation state: store the state where the entity is incorporated, organized or registered.
• Foreign qualification: a company can be formed in one state and registered to do business in others; those records should not be deduplicated blindly.
• Registered agent and service address: useful for legal service and matching, but not a sales-contact signal.
• Document access: some states expose free PDFs, others charge for certified documents or bulk orders.
• Bulk/API access: availability, fees, terms and field scope vary state by state.
• Update cadence: annual reports, amendments, dissolutions and reinstatements are state-specific event streams.

Frequently Asked Questions: United States Business Registry (SEC EDGAR & State SOS Registries) & Company Data

How can I run an official company register search in United States using the SEC CIK (10-digit), State SOS File Number & IRS EIN?

Official corporate verification in United States is conducted through SEC EDGAR (U.S. Securities and Exchange Commission) & 50-State Secretary of State (SOS) Business Registries, where legal entities are indexed under their statutory SEC CIK (10-digit), State SOS File Number & IRS EIN. Depending on the entity type and filing layer, primary verification portals include California Business Search (bizfileonline.sos.ca.gov, official state registry) and Delaware entity search (official state registry). Always record the exact registration number and issuing authority shown on the official extract.

What open data portals and programmatic endpoints exist for United States company data?

In United States, public-sector open data and statistical corporate datasets are published through SAM Entity/Exclusions Extract APIs (official GSA API) and Data.gov (official open data), alongside core registry lookups at SEC EDGAR & State SOS Registries. However, each portal applies its own schema, update cadence, and dataset-specific reuse terms (Public entity and exclusions extracts for compliance workflows.), so programmatic ingestion requires linking records back to the statutory SEC CIK (10-digit), State SOS File Number & IRS EIN.

How do tax authorities and financial regulators in United States complement SEC EDGAR & State SOS Registries records?

Alongside core corporate registration in SEC EDGAR & State SOS Registries under the SEC CIK (10-digit), State SOS File Number & IRS EIN, fiscal and financial-sector verification in United States draws upon IRS Tax Exempt Organization Search (official tax authority), SEC EDGAR APIs (sec.gov, official regulator), and data.sec.gov (data.sec.gov, official regulator). These authorities maintain taxpayer compliance records, supervised financial-institution directories, and regulatory disclosures separately from general commercial incorporation filings.

Which official portals in United States cover public procurement, official gazettes, and intellectual property?

Beyond core registration in SEC EDGAR (U.S. Securities and Exchange Commission) & 50-State Secretary of State (SOS) Business Registries, researchers tracking government contractors, statutory notices, or brand ownership in United States can consult Entity Information (official federal procurement/entity source), SAM.gov Entity Management API (official GSA API), and USAspending API (official federal open data). Because these portals index participating suppliers, published legal notices, or registered rights holders, they function as enrichment layers keyed to the entity’s SEC CIK (10-digit), State SOS File Number & IRS EIN.

What is the best first source for United States company data?

The best first source is state business registries for private-company legal existence, SEC EDGAR for reporting companies, SAM.gov and USAspending for federal contractors and award recipients, IRS exempt-organization data, USPTO trademark data, OFAC sanctions screening and FinCEN BOI as a restricted non-public compliance boundary. It should then be combined with statistics, procurement, IP and regulator sources.

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Spain Companies Database (.xlsx)	Europe	1,200,000+ firms	480,000+ emails	EUR 127.00	Instant Buy →Dossier
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France Companies Database (.xlsx)	Europe	580,729 firms	395,884 emails	EUR 178.00	Instant Buy →Dossier
Italy Companies Database (.xlsx)	Europe	483,706 firms	352,599 emails	EUR 178.00	Instant Buy →Dossier
Netherlands Companies Database (.xlsx)	Europe	971,883 firms	485,250 emails	EUR 127.00	Instant Buy →Dossier
Poland Companies Database (.xlsx)	Europe	660,415 firms	554,398 emails	EUR 99.50	Instant Buy →Dossier
Belgium Companies Database (.xlsx)	Europe	284,694 firms	216,151 emails	EUR 127.00	Instant Buy →Dossier
Switzerland Companies Database (.xlsx)	Europe	132,022 firms	104,602 emails	EUR 127.00	Instant Buy →Dossier
Denmark Companies Database (.xlsx)	Europe	132,453 firms	73,503 emails	EUR 127.00	Instant Buy →Dossier
Sweden Companies Database (.xlsx)	Europe	210,000+ firms	115,000+ emails	EUR 127.00	Instant Buy →Dossier
Norway Companies Database (.xlsx)	Europe	145,000+ firms	85,000+ emails	EUR 127.00	Instant Buy →Dossier
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Lithuania Companies Database (.xlsx)	Europe	150,000+ firms	90,519 emails	EUR 57.00	Instant Buy →Dossier
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Ireland Companies Database (.xlsx)	Europe	41,148 firms	31,653 emails	EUR 78.00	Instant Buy →Dossier
Slovakia Companies Database (.xlsx)	Europe	36,528 firms	23,008 emails	EUR 127.00	Instant Buy →Dossier
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