A more recent edition of NAICS is available.
2012 Edition

national industry 523991

Trust, Fiduciary, and Custody Activities


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).

The immediate parent of national industry 523991 is international industry 52399: All Other Financial Investment Activities

2012 NAICS Edition Cross References

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


The NAICS editions in which this code was present are indicated below. In the event that a code was changed from the prior edition the equivalent value in that edition is provided for reference.

Edition Existed Equivalent Value
2002 523991
2007 523991
2012 523991
2017 523991
2022 523991

Insurance Industry Mappings

The US Property and Casualty Insurance Industry may use the following classification descriptions which might encompass national industry 523991, Trust, Fiduciary, and Custody Activities:

  1. all other financial investment activity
  2. escrow agency other than real estate
  3. finance and insurance
  4. function related to depository banking not otherwise classified
  5. investment service
  6. non deposit trust facility
  7. other financial investment activity
  8. security commodity contract and other financial investment and related activity
  9. service allied with the exchange of security or commodity not otherwise classified
  10. trust company
  11. trust company not accepting deposit
  12. trust except educational religious and charitable
  13. trust fiduciary and custody activity
  14. trust fiduciary and custody activity naic
  15. trustee service


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