The IRS does not use the full NIACS list.
Credit Intermediation & Related Activities
522100 Depository credit intermediation (including commercial banking, savings institutions, & credit unions)
522200 Nondepository credit intermediation (including sales financing & consumer lending)
522300 Activities related to credit intermediation (including loan brokers)
Insurance Agents, Brokers, & Related Activities
524210 Insurance agencies & brokerages
524290 Other insurance related activities
Securities, Commodity Contracts, &
Other Financial Investments & Related Activities
523160 Commodity contracts intermediation
523150 Investment banking & securities intermediation
523210 Securities & commodity exchanges
523900 Other financial investment activities (including investment advice)