523150 — Investment Banking and Securities Intermediation
Description
This industry comprises establishments primarily engaged in underwriting, originating, and/or maintaining markets for issues of securities, or acting as agents (i.e., brokers) between buyers and sellers in buying or selling securities on a commission or transaction fee basis. Investment bankers act as principals (i.e., investors who buy or sell on their own account) in firm commitment transactions or act as agents in best effort and standby commitments. This industry also includes establishments acting as principals in buying or selling securities generally on a spread basis, such as securities dealers or stock option dealers.
Illustrative Examples
- Bond dealing (i.e., acting as a principal in dealing securities to investors)
- Mutual fund agencies (i.e., brokerages)
- Securities brokerages
- Securities underwriting
- Stock brokerages
- Stock options dealing
Overview Facts
| NAICS Code | 523150 |
|---|---|
| Industry Title | Investment Banking and Securities Intermediation |
| SBA Size Standard | $47,000,000 |
| IRS PBA Code | 523150 (exact match) |
| Sectors Hierarchy | Sector 52 → 523 → 5231 |
| 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→NAICS1997:52312→2002:523120→2007:523120→2012:523120→2017:523120→2022:523150)
Related Resources & Compliance Guides
Further regulatory reference links for NAICS code 523150:
- 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 5231
Frequently Asked Questions (FAQ)
Is 523150 a valid 2022 NAICS code?
NAICS 523150 is 'Investment Banking and Securities Intermediation', 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 523150?
The SBA small business size standard for NAICS 523150 is $47,000,000 (based on receipts).
What is the legacy SIC code mapping for 523150?
NAICS code 523150 maps to the legacy 1987 SIC codes: 6211 - Security Brokers, Dealers, and Flotation Companies.