NAICS Code 525910 — Open-End Investment Funds

National Industry in the official 2022 North American Industry Classification System (U.S. Census Bureau). It is the only national industry under 52591 (Open-End Investment Funds).

Code	525910
Title	Open-End Investment Funds
Level	National Industry (6-digit)
Edition	NAICS 2022 edition
SBA size standard	$40 million in average annual receipts

Official definition (2022 NAICS)

This industry comprises legal entities (i.e., open-end investment funds) organized to pool assets that consist of securities or other financial instruments. Shares in these pools are offered to the public in an initial offering with additional shares offered continuously and perpetually and redeemed at a specific price determined by the net asset value.

Illustrative Examples:

Investment funds, open-ended

Money market mutual funds, open-ended

Is a business under 525910 "small"?

Under the SBA size standards (13 CFR 121.201, effective March 17, 2023), a business classified in NAICS 525910 qualifies as a small business if it does not exceed $40 million in average annual receipts. Small-business status determines eligibility for federal set-aside contracts, SAM.gov certifications and SBA loan programs — receipts are averaged over the latest 5 fiscal years.

Where 525910 sits in the hierarchy

Level	Code	Title
Sector	52	Finance and Insurance
Subsector	525	Funds, Trusts, and Other Financial Vehicles
Industry Group	5259	Other Investment Pools and Funds
NAICS Industry	52591	Open-End Investment Funds
National Industry	525910	Open-End Investment Funds

Related SIC codes

Via the official U.S. Census concordance (1987 SIC ↔ NAICS), shown only where the industry definition is unchanged in NAICS 2022.

SIC code	Title
6722	Management Investment Offices, Open-End

Data: official 2022 NAICS structure, descriptions and Census concordances, U.S. Census Bureau — U.S. government works in the public domain (17 U.S.C. §105). Suggested reference, not an official determination.