Company-Level NAICS and SIC Classification Methodology

SICCODE.com Classification Methodology

SICCODE.com company-level classifications identify the primary NAICS and SIC classification for a business as an enterprise. This methodology is used for public company profiles, business research, data enrichment, market analysis, and company comparison.

Last Reviewed: May 2026 Company-Level Classification Reviewed Under Defined QA Process

Methodology Summary

Scope Company-level, not address-level The classification describes the company as an enterprise, not a single office, facility, branch, store, or operating site.
Evidence Current business evidence Profiles consider public filings, company materials, business segments, revenue drivers, products, services, and source-code records.
Review Defined QA process Profiles are reviewed for scope, code-title accuracy, source-code conflicts, alternative-code reasoning, and appropriate limitations.

What Company-Level Classification Means

Company-level classification identifies the primary NAICS and SIC classification for a company as an enterprise. It considers the company’s current business model, primary revenue drivers, operating segments, products, services, brands, platforms, subsidiaries, and public business evidence.

A company-level classification is intended to answer a different question than an establishment-level classification. It asks what the company does as an enterprise, rather than what activity occurs at one physical location.

Core principle: A public company may operate stores, plants, offices, fulfillment centers, laboratories, branches, or subsidiaries that would each have different NAICS or SIC classifications if reviewed separately. The company-level profile focuses on the enterprise-level business.

Company-Level vs. Establishment-Level Classification

Classification Type What It Classifies How It Is Used
Company-level classification The business as an enterprise, using current enterprise-level evidence. Public company profiles, company comparison, market research, business data enrichment, and industry targeting.
Establishment-level classification A specific physical location, operating site, office, branch, store, plant, or facility. Location-level business records, facility analysis, local market research, and establishment-specific data applications.

SICCODE.com public company profiles use company-level classification unless a page clearly states that a specific establishment is being reviewed.

Classification Standards and Code Editions

SICCODE.com company-level classifications are prepared using 2022 NAICS code titles and the 1987 4-digit SIC system, unless a profile or source record clearly states otherwise. The applied code titles must match the corresponding NAICS and SIC code titles used in SICCODE.com’s classification reference system.

NAICS standards are periodically revised, while SIC classifications are maintained as a legacy 4-digit classification system. When classification standards, company facts, or public evidence change, profiles may be reviewed or refreshed as part of SICCODE.com’s classification maintenance process.

Profile date principle: A public company profile should be read in light of its profile-specific reviewed-as-of date. Company status, revenue, employees, business segments, mergers, delistings, and operating focus may change after a profile is reviewed.

Evidence Reviewed

SICCODE.com reviews available business evidence before assigning a company-level classification. The evidence depends on the company, the source data available, and the current public record.

  • ✓Annual reports, Form 10-K, Form 20-F, Form 40-F, and equivalent public filings.
  • ✓Investor materials, company websites, product descriptions, segment descriptions, and public business disclosures.
  • ✓Revenue drivers, employee data, assets, subsidiaries, platforms, product lines, services, brands, and customer markets when available.
  • ✓SEC-reported SIC codes, self-reported industry codes, commercial database codes, prior classifications, and extended SICCODE.com industry segments as candidate inputs.
  • ✓Specific sources reviewed for the profile, when available, so users can understand which records supported the classification decision.

How Primary NAICS and SIC Codes Are Selected

The primary NAICS and SIC codes are selected based on the company’s current dominant business activity. When a company has multiple business lines, SICCODE.com considers the relative importance of operating segments, revenue sources, product lines, services, customer markets, and current public disclosures.

1 Identify the current business Review what the company sells, produces, operates, manages, or provides today.
2 Compare candidate codes Evaluate supplied NAICS, SIC, SEC SIC, legacy, and extended codes against current evidence.
3 Select the best company-level code Choose the code pair that best describes the enterprise-level activity, not a single location or channel.
4 Document alternatives Record meaningful competing codes when they clarify a real classification boundary.

Classification Complexity

Classification complexity describes how straightforward or judgment-based a company-level classification is. It helps users understand whether the selected NAICS and SIC codes are direct matches or whether the classification required additional review of business segments, revenue mix, operating model, source-code conflicts, or alternative codes.

Complexity Level Meaning Common Reasons
Straightforward The company’s primary business activity clearly aligns with the selected NAICS and SIC codes. Single dominant business line, consistent public descriptions, limited code conflict.
Moderate The classification is supported, but meaningful alternatives or secondary activities were reviewed. Multiple products, service lines, channels, subsidiaries, or broad reported codes.
Complex The classification requires more judgment because the company has several significant activities or conflicting evidence. Diversified operations, acquisitions, changed business focus, SPAC history, delisting, restructuring, or competing source-code records.
How this appears on profiles: A public company profile may include a short classification complexity note when the classification decision benefits from added context. The note is not a separate code. It explains the level of review or ambiguity involved in selecting the primary company-level classification.

How Existing Classification Records Are Reviewed

Self-reported industry codes, SEC-reported SIC codes, commercial database codes, prior classifications, and extended industry segments are reviewed as classification inputs. They may help identify possible NAICS or SIC codes, but they do not automatically control the final company-level classification.

When an existing classification record conflicts with current business evidence, SICCODE.com gives greater weight to the company’s current business model, operating segments, revenue drivers, products, services, and public disclosures. The final profile may accept the existing code, refine it, convert it to an official parent code, retain it as a secondary code, or explain why another classification is more appropriate.

Important distinction: SEC-reported SIC codes can provide useful public-company context, but they are often broad industry groupings. SICCODE.com may apply a more specific company-level NAICS or SIC classification when the reviewed evidence supports it.

Secondary Codes and Alternative Codes

Secondary and alternative codes are used only when they add meaningful classification value. They are not intended to list every activity mentioned in a company’s public materials.

Code Type Purpose When It Appears
Primary code Best company-level NAICS or SIC classification. Shown on every company-level profile.
Secondary code Major business line, operating model, or useful specialization. Shown when supported by evidence.
Alternative code Plausible code considered during review. Shown when it explains a meaningful classification boundary.
Extended code Marketing-level or targeting-level specialization. Shown when useful for business data, market research, or B2B targeting.

Public Company Status Changes

Public company classifications may be affected by acquisitions, delistings, bankruptcies, SPAC transactions, shell status, fund status, discontinued operations, mergers, divestitures, reorganizations, or major strategic pivots.

When reliable current evidence shows a material status change, SICCODE.com considers whether the company’s classification should reflect the new entity status, current operating business, or historical business context.

Freshness note: Public company profiles should display a reviewed-as-of date so users can evaluate whether the classification and company facts reflect the available public evidence at the time the profile was reviewed.

Defined QA Process and Quality Controls

Public company classification profiles are reviewed under a defined QA process before publication. The QA process focuses on whether the selected NAICS and SIC codes are supported by available evidence and whether the profile clearly explains the classification decision.

  • ✓Company-level scope review.
  • ✓Code-title accuracy review.
  • ✓Current business evidence review.
  • ✓Source-code conflict review.
  • ✓Alternative-code and secondary-code review.
  • ✓Classification complexity review when applicable.
  • ✓SBA-size statement review when applicable.

Limitations and Appropriate Use

Company-level classifications are intended for business research, data enrichment, market analysis, company comparison, public-company lookup, and industry targeting.

They should not be treated as a substitute for an official government filing, legal determination, tax determination, procurement eligibility decision, investment decision, or SBA size determination.

For official-use situations, companies should verify their NAICS and SIC classifications against the specific requirements of the agency, lender, vendor, procurement system, or compliance workflow involved.

Factual Issue and Status Change Reports

If a public company profile appears to contain an outdated business status, incorrect company fact, broken source, or material status change, users may report the issue to SICCODE.com through the Contact Us page for review as part of the profile maintenance process.

Factual issue reports are separate from paid classification review requests. Paid classification services are intended for users who want SICCODE.com to re-evaluate a company’s NAICS or SIC classification, alternative codes, classification rationale, or supporting business evidence in greater detail.

Report a factual issue or material status change

Frequently Asked Questions

What is a company-level NAICS or SIC classification?

It is a classification of the company as an enterprise based on its current enterprise-level business activity.

Is a company-level classification the same as an establishment classification?

No. An establishment classification applies to a specific physical location. A company-level classification applies to the business as an enterprise.

What does classification complexity mean?

Classification complexity explains whether a company-level classification is straightforward or whether it required additional review of business segments, source-code conflicts, alternative codes, status changes, or mixed operating activities.

Are SEC-reported SIC codes always the final SICCODE.com classification?

No. SEC-reported SIC codes are reviewed as candidate inputs. SICCODE.com may apply a more specific company-level classification when current evidence supports it.

Why can a company have secondary or alternative codes?

Secondary and alternative codes help explain major business lines, real classification boundaries, or source-code conflicts that may matter for research, targeting, or data enrichment.

Are company-level classifications official government determinations?

No. They are classification reference profiles prepared for research, comparison, data enrichment, and targeting use. They do not replace official government, legal, procurement, tax, or SBA determinations.

How can I report an outdated company fact or status change?

Users may report factual issues, outdated business status, broken sources, or material status changes through the SICCODE.com Contact Us page for review as part of the profile maintenance process.

Related Classification Resources

Use these resources to understand how SICCODE.com reviews classifications, maintains methodology standards, and supports NAICS and SIC research.

Industry Classification Review Team Classification Governance & Standards Center NAICS Classification Methodology Data Verification Methodology NAICS Code Lookup SIC Code Lookup