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 (as defined in the official U.S. Census Bureau 2022 NAICS Manual).
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
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)
Suggested Product Service Codes (Advisory)
The following Product Service Codes (PSCs) are advisory suggestions aligned with this NAICS code. Note: NAICS and PSC codes map to different dimensions of procurement (industry vs. product/service). There is no official binding 1:1 crosswalk.
- PSC R710 — Financial Services (includes credit card services and any other financial services. See revision to description for code R703 above)
Source: DoD DPCAP PSC Selection Tool (Ingested: 2026-06-29)
Frequently Asked Questions (FAQ)
Is NAICS code 523999 valid in 2022? ▾
Yes, 523999 is a valid 6-digit 2022 NAICS national industry code representing 'Miscellaneous Financial Investment Activities' under Sector 52 in the official classification index.
What is the SBA size standard for NAICS code 523999? ▾
The Small Business Administration (SBA) has established a small business size standard of $47,000,000 for NAICS code 523999 (Miscellaneous Financial Investment Activities), calculated based on receipts.
What is the legacy SIC equivalent for NAICS 523999? ▾
According to official Census Bureau concordance tables, NAICS code 523999 (Miscellaneous Financial Investment Activities) maps to legacy 1987 Standard Industrial Classification (SIC) codes: 6211 - Security Brokers, Dealers, and Flotation Companies, 6289 - Services Allied With the Exchange of Securities or Commodities, NEC.
Related Pages & Tools
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.
- NAICS 523999 to SIC Crosswalk — Bidirectional mapping to legacy SIC codes (Miscellaneous Financial Investment Activities).
- 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.