NAICS Code 523991: Trust, Fiduciary, and Custody Activities
National industry
SBA small business size standard: $47 million in average annual receipts
Definition
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).
Government contracts for this service: PSC R499 Other Professional Services and PSC R703 Accounting Services (NOTE: New code created for Financial Services See R710 below)
Code facts
- Part of
-
-
52
-
523
-
5239
- 52399
-
5239
-
523
-
52
- Contract awards
- 1 In the last 12 months
- Contract obligations
- $7,961,793 In FY2025
NAICS codes and definitions come from the U.S. Census Bureau, size standards from the SBA and contract spending from SAM.gov/FPDS.
Business activities under NAICS 523991
- Administrators of private estates
- Bank trust offices
- Escrow agencies (except real estate)
- Fiduciary agencies (except real estate)
- Personal investments trust administration
- Securities custodians
- Trust administration, personal investment
- Trust companies, nondepository
Looking for another activity? Search the NAICS code lookup or browse business activities from A to Z.
Contract obligations by fiscal year
| Fiscal year | Obligated |
|---|---|
| FY2027 To date | $0 |
| FY2026 | $8,734,899 |
| FY2025 | $7,961,793 |
| FY2024 | $12,039,730 |
| FY2023 | $9,680,535 |
Top contractors by obligations
| Rank | Contractor | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | Innovest Systems, LLC | $5,000,000 | |
| 2 | State Street Corporation | $3,999,014 | |
| 3 | Spectrum International, Incorporated | $1,164,212 | |
| 4 | U.s. Bank National Association | $50,000 | |
| 5 | Columbus House, Inc. | $33,897 |
Top funding agencies by obligations
| Rank | Agency | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | Department of the Interior | $5,000,000 | |
| 2 | Pension Benefit Guaranty Corporation | $3,651,002 | |
| 3 | International Development Finance Corporation | $50,000 | |
| 4 | Department of Veterans Affairs | $33,897 |
Top PSC codes by obligations
| Rank | PSC code | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | R499 Other Professional Services | $5,000,000 | |
| 2 | R703 Accounting Services (NOTE: New code created for Financial Services See R710 below) | $3,999,014 | |
| 3 | R418 Legal Services | $1,164,212 |
Contract obligations by state
| Rank | Place of performance | Obligated, last 12 months | Share |
|---|---|---|---|
| 1 | District of Columbia | $5,213,226 | |
| 2 | New York | $3,487,777 | |
| 3 | Connecticut | $33,963 |
Shares are of everything obligated under NAICS 523991 in the last 12 months before deobligations, including work performed abroad or with no place of performance on record.
Contract opportunities
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Latest 50 of 58 listed here. See the rest on GovTribe.
Size standard history
Federal Register rules that named this code
From the NAICS codes each rule's amendments to 13 CFR 121.201 name. Rules that print their size standard tables as images aren't listed.
Quick answers
What is NAICS 523991?
NAICS 523991 is Trust, Fiduciary, and Custody Activities, a national industry in NAICS 52, Finance and Insurance.
What is the NAICS code for bank trust offices?
The NAICS code for bank trust offices is 523991, Trust, Fiduciary, and Custody Activities.
What is the NAICS code for securities custodians?
The NAICS code for securities custodians is 523991, Trust, Fiduciary, and Custody Activities.
What is the NAICS code for administrators of private estates?
The NAICS code for administrators of private estates is 523991, Trust, Fiduciary, and Custody Activities.
When did the size standard for NAICS 523991 last change?
The most recent Federal Register rule on record that names NAICS 523991 in the SBA's size standards is "Small Business Size Standards: Adjustment of Monetary-Based Size Standards, Disadvantage Thresholds, and 8(a) Eligibility Thresholds for Inflation" (87 FR 69118), published Nov 17, 2022 and effective Dec 19, 2022.
How much do federal agencies spend under NAICS 523991?
Federal contracts under NAICS 523991 obligated $7,961,793 in fiscal year 2025 and $38,416,957 in fiscal years 2023 through 2027.
Who are the largest contractors under NAICS 523991?
The contractors with the most obligated under NAICS 523991 in fiscal years 2026 and 2027 are Innovest Systems, LLC ($5,000,000); State Street Corporation ($3,999,014); and Spectrum International, Incorporated ($1,164,212).
Which agencies buy the most under NAICS 523991?
The agencies that obligated the most under NAICS 523991 in fiscal years 2026 and 2027 are Department of the Interior ($5,000,000), Pension Benefit Guaranty Corporation ($3,651,002) and International Development Finance Corporation ($50,000).
Which PSC codes are used with NAICS 523991?
The PSC codes with the most obligated under NAICS 523991 in fiscal years 2026 and 2027 are R499 Other Professional Services, R703 Accounting Services (NOTE: New code created for Financial Services See R710 below) and R418 Legal Services.
Where is the work under NAICS 523991 performed?
By place of performance, the states with the most contract obligations under NAICS 523991 over the last 12 months are the District of Columbia ($5,213,226), New York ($3,487,777) and Connecticut ($33,963).
What is the latest contract opportunity under NAICS 523991?
The latest contract opportunity under NAICS 523991 is Special Notice - IEEs in Specific Industries, pre-solicitation from Central Office (BIA), posted June 30, 2026.
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See everything under NAICS 523991
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