523999 — Miscellaneous Financial Investment Activities
Description
This U.S. industry comprises establishments primarily engaged in acting as agents and/or brokers (except securities brokerages and commodity contracts brokerages) in buying or selling financial contracts and those providing financial investment services (except securities and commodity exchanges; portfolio management; investment advice; and trust, fiduciary, and custody services) on a fee or commission basis.
Illustrative Examples
- Exchange clearinghouses, commodities or securities
- Stock quotation services
- Gas lease brokers' offices
Exclusions & Cross-References
- Investment banking, securities dealing, securities brokering, commodity contracts dealing, or commodity
- contracts brokering--are classified in Industry Group 5231, Securities and Commodity Contracts
- Intermediation and Brokerage;
- Acting as principals or agents (i.e., brokers) in buying or selling virtual currency (cryptocurrency)--are
- classified in Industry 523160, Commodity Contracts Intermediation;
- Acting as principals (except investment bankers, securities dealers, and commodity contracts dealers) in
- buying or selling financial contracts--are classified in Industry 523910, Miscellaneous Intermediation;
- Furnishing physical or electronic marketplaces for the purpose of facilitating the buying and selling of
- securities and commodities--are classified in Industry 523210, Securities and Commodity Exchanges;
- Managing the portfolio assets (i.e., funds) of others and/or providing customized investment advice--are
- classified in Industry 523940, Portfolio Management and Investment Advice;
- Providing trust, fiduciary, and custody services to others--are classified in U.S. Industry 523991, Trust,
Overview Facts
| NAICS Code | 523999 |
|---|---|
| Industry Title | Miscellaneous Financial Investment Activities |
| SBA Size Standard | $47,000,000 |
| IRS PBA Code | 523900 (rolled-up match) |
| Sectors Hierarchy | Sector 52 → 523 → 5239 |
| Source / Verified | US Census 2022 NAICS Manual / 2026-06-28 |
Legacy SIC Concordance
Trace the historical mapping chain from the 1987 Standard Industrial Classification (SIC) to the modern 2022 NAICS code format.
- SIC 6211 - Security Brokers, Dealers, and Flotation Companies (via SIC1987:6211→NAICS1997:523999→2002:523999→2007:523999→2012:523999→2017:523999→2022:523999)
- SIC 6289 - Services Allied With the Exchange of Securities or Commodities, NEC (via SIC1987:6289→NAICS1997:523999→2002:523999→2007:523999→2012:523999→2017:523999→2022:523999)
Related Resources & Compliance Guides
Further regulatory reference links for NAICS code 523999:
- Sector 52 Directory Hub — List of related industries in the Finance and Insurance sector.
- SIC ↔ NAICS Crosswalk Tool — Look up mappings between legacy SIC codes and modern classifications.
- SBA Size Standards Guide — Complete rules and averaging periods for small business classifications.
- Calculating Annual Receipts Guide — Detailed worked example of revenue calculation rules.
- IRS Principal Business Activity Guide — How NAICS codes map to corporate and entity tax filings.
Related Industries in 5239
Frequently Asked Questions (FAQ)
Is 523999 a valid 2022 NAICS code?
NAICS 523999 is 'Miscellaneous Financial Investment Activities', a 2022 U.S. national industry under Sector 52 (Finance and Insurance); the SBA small-business size standard is $47,000,000.
What is the SBA size standard for NAICS 523999?
The SBA small business size standard for NAICS 523999 is $47,000,000 (based on receipts).
What is the legacy SIC code mapping for 523999?
NAICS code 523999 maps to the legacy 1987 SIC codes: 6211 - Security Brokers, Dealers, and Flotation Companies, 6289 - Services Allied With the Exchange of Securities or Commodities, NEC.