How SEC EDGAR Uses SIC Codes for Public Company

How SEC EDGAR Uses SIC Codes for Public Company Classification

Compiled & reviewed by the EntityCodes Editorial Team (Tech Labs FZ LLC) · Data verified: 2026-06-28

The U.S. Securities and Exchange Commission (SEC) utilizes Standard Industrial Classification (SIC) codes to organize and filter public company filings on the EDGAR database.

How the SEC Assigns SIC Classifications

The SEC assigns a primary four-digit SIC code to every public company filing annual reports (Form 10-K) ^[1]. This code is selected based on the industry sector that contributes the majority of the company's annual revenue. For instance, public software development firms are classified under SIC 7371 (Computer Programming Services).

The SEC Division of Corporation Finance maintains a list of approximately 450 active SIC codes for reporting companies ^[1]. Financial analysts use these codes to run peer comparisons and screen filings by industry sector.

Worked Example: SEC SIC Filter Query

If you search the SEC EDGAR directory, entering a SIC code like 7371 restricts results to computer programming companies. This classification stays tied to the filer until their revenue structure shifts, requiring a formal update in their registration metadata.

Legacy Industrial Classification Guidelines

To support the core compliance tasks detailed in this guide on How SEC EDGAR Uses SIC Codes for Public Company Classification, compliance officers and corporate attorneys must consult several legacy industrial databases. Workplace safety guidelines are based on the U.S. Occupational Safety and Health Administration (OSHA) Standard Industrial Classification (SIC) Manual. For financial reporting, public registries continue to group companies using the U.S. Securities and Exchange Commission (SEC) SEC EDGAR Filer Standard Industrial Classification Codes. Mappings between retired classes and active codes are resolved using the U.S. Census Bureau SIC to NAICS Concordance Mapping Tables. Macroeconomic indices are structured around the Federal Reserve Board (FRB) Industrial Production and Capacity Utilization G.17 Release. Employment archives are categorized under the Bureau of Labor Statistics (BLS) SIC Archive for Quarterly Census of Employment and Wages (QCEW), occupational hazard research uses the National Institute for Occupational Safety and Health (NIOSH) SIC Occupational Injury and Illness Coding Guidelines, and disclosure compliance uses the U.S. Securities and Exchange Commission (SEC) Regulation S-K Commercial Disclosure and SIC Requirements. Code lookups can be run via the NAICS Association Standard Industrial Classification (SIC) Lookup Directory. Safety oversight is legislated by the U.S. Congress Occupational Safety and Health Act of 1970 Statutory Text, and the historical development is detailed by the Office of Management and Budget (OMB) Standard Industrial Classification Manual Development History.

💡 Expert Guidance: SEC EDGAR Filer Classification Delay

When registering a public company, selecting an SEC SIC code that does not reflect your primary revenue segment can cause review delays by the Division of Corporation Finance. The SEC assigns peer review groups based on these SIC codes, so a mismatch will lead to irrelevant disclosure comparisons and administrative comments.

Frequently Asked Questions

Does the SEC use NAICS codes? ▾

The SEC continues to rely primarily on the legacy 4-digit SIC system for classifying reporting companies, though some forms allow listing a NAICS code.

How can I find a public company's SIC code? ▾

A company's assigned SIC code is listed at the top of its SEC EDGAR company profile page next to its Central Index Key (CIK).

How does the SEC Division of Corporation Finance assign SIC codes to public companies? ▾

The SEC assigns a primary four-digit SIC code to every public company filing reports on the EDGAR database based on the industry sector that contributes the majority of the company's annual revenues, as disclosed in their Form 10-K filing.

Can a public company change its assigned SEC SIC code? ▾

Yes. If a public company shifts its core operations, acquires a major division in another sector, or experiences a major change in its revenue structure, it must notify the SEC and update its corporate registration metadata to declare a new primary SIC code.

Where is the assigned SIC code displayed on an EDGAR company profile? ▾

The assigned four-digit SIC code is displayed prominently at the top of the company's SEC EDGAR search profile, next to its Central Index Key (CIK) and IRS Employer Identification Number (EIN).

How many active SIC codes does the SEC maintain for EDGAR filers? ▾

The SEC Division of Corporation Finance maintains a curated list of approximately 450 active SIC codes to group reporting public companies, which is a simplified subset of the full 1,004 codes in the 1987 SIC manual.

Does the SEC EDGAR system allow searching filings by SIC code? ▾

Yes, the EDGAR search interface allows users to filter filings by entering `sic=XXXX` in the query field. This enables financial analysts to retrieve filings for all public companies within a specific industry division.

Does the SEC use NAICS codes for regulatory filings? ▾

No, the SEC continues to rely primarily on the legacy four-digit SIC system for organizing and reviewing periodic reports, though some registrations and disclosures permit optional inclusion of a NAICS code.

How does the SEC use SIC codes during periodic filing reviews? ▾

The SEC Division of Corporation Finance organizes its review staff into specialized industry offices defined by groups of SIC codes (such as the Office of Technology or Office of Life Sciences) to ensure reviewers possess sector-specific expertise.

What happens if a company's SEC SIC code does not match its declared NAICS code on SAM.gov? ▾

Because the SEC EDGAR system and SAM.gov are separate databases operated by different agencies (SEC vs. GSA), discrepancy between the SEC SIC code and the SAM.gov NAICS code does not trigger automatic compliance errors, but it can cause consistency issues in B2B databases.