NAICS Code 523991 Trust, Fiduciary, and Custody Activities


Finance and Insurance


This U.S. industry comprises establishments primarily engaged in providing trust, fiduciary, and custody services to others, as instructed, on a fee or contract basis, such as bank trust offices and escrow agencies (except real estate).

Cross References

Establishments primarily engaged in
  • Managing the portfolio assets (i.e., funds) of others: classified in Industry 523920, Portfolio Management
  • Performing real estate escrow or real estate fiduciary activities: classified in Industry 531390, Other Activities Related to Real Estate
  • Awarding grants from trust funds: classified in Industry 81321, Grantmaking and Giving Services.

Industries Included

  • Administrators of private estates
  • Bank trust offices
  • Escrow agencies (except real estate)
  • Escrow agency (except real estate)
  • Fiduciary agencies (except real estate)
  • Fiduciary agency (except real estate)
  • Personal investments trust administration
  • Securities custodians
  • Trust administration, personal investment
  • Trust companies, nondepository

Industry Leaders