# SRB Corporation

> SRB Corporation is an SEC-registered investment advisory firm in Boston, MA, registered since 2012, reporting $1 billion to $5 billion in regulatory assets under management in its Form ADV filing dated March 30, 2026.

- CRD: 161163
- Filed as: SRB CORPORATION
- Registration: SEC-registered investment adviser (status as filed: Approved)
- Location: Boston, MA
- Filing period: October 2026
- Form ADV filing dated: March 30, 2026
- SEC record (IAPD): https://adviserinfo.sec.gov/firm/summary/161163
- AdvisorCensus page: https://advisorcensus.com/firm/srb-corporation-boston-ma-161163

## Quick answers

**How is SRB Corporation compensated?**
On its Form ADV (Item 5.E, October 2026), SRB Corporation reports these compensation arrangements: a percentage of assets under its management.

**Where is SRB Corporation located?**
SRB Corporation's principal office is in Boston, MA, according to its Form ADV.

**Is SRB Corporation registered with the SEC or a state?**
SRB Corporation is an SEC-registered investment advisory firm, registered since 2012. Status as filed: Approved. CRD 161163.

**How much does SRB Corporation manage?**
SRB Corporation reports $4,821,115,000 in regulatory assets under management in its Form ADV filing dated March 30, 2026 (100% discretionary).

**How have SRB Corporation's assets and staff changed since 2021?**
In the Form ADV data for SRB Corporation: Regulatory assets under management: $2,822,437,000 in the October 2021 data and $4,821,115,000 in the October 2026 data, up 71%. Total employees: 4 in October 2021 and 4 in October 2026. Assets under management move with markets as well as with clients coming and going.

**What types of clients does SRB Corporation serve?**
By number of clients on Form ADV Item 5.D: insurance companies (20).

**Which custodians does SRB Corporation use?**
SRB Corporation's most recent Form ADV filing (Schedule D, Section 5.K(3)) lists Northern Trust as a custodian holding 10% or more of its separately managed account assets.

**Does SRB Corporation report any disciplinary disclosures?**
Reports no disclosure items on Form ADV Item 11. The detail of any item is on the firm's SEC record: https://adviserinfo.sec.gov/firm/summary/161163

**What changed in SRB Corporation's recent Form ADV filings?**
In the April 2026 filing data: Regulatory assets under management went from $4,202,600,000 to $4,821,115,000 (+15%).

## From the Form ADV filing

### Compensation (Item 5.E)
- A percentage of assets under your management

### Custodians (Schedule D, Section 5.K(3))
- Northern Trust

Custodians holding 10% or more of the firm's separately managed account assets, as filed on Form ADV (Schedule D, Section 5.K(3)). A custodian holds client assets; it does not endorse or supervise the firm. AdvisorCensus has no relationship with any custodian.

### Regulatory assets under management (Item 5.F)
- Total: $4,821,115,000
- Discretionary: $4,821,115,000
- Non-discretionary: $0

### Clients (Item 5.D)

| Client type | Clients | Assets |
| --- | --- | --- |
| Insurance companies | 20 | $4,591,814,000 |
| Corporations or other businesses not listed above | Fewer than 5 | $229,301,000 |

### Advisory services (Item 5.G)
- Other

### Firm details
- Registered since: 2012 (14 years)
- Employees: 4 total, 2 performing advisory functions
- Wrap fee program participation: No
- States registered or notice-filed: MA
- Disclosures (Item 11): Reports no disclosure items on Form ADV Item 11.

## Assets and staff over time

| Data period | Regulatory assets under management | Employees | Filing dated |
| --- | --- | --- | --- |
| October 2021 | $2,822,437,000 | 4 | March 31, 2021 |
| October 2022 | $3,224,282,000 | 4 | March 31, 2022 |
| October 2023 | $2,665,167,000 | 4 | March 31, 2023 |
| October 2024 | $3,890,087,000 | 4 | March 29, 2024 |
| October 2025 | $4,202,600,000 | 4 | March 28, 2025 |
| October 2026 | $4,821,115,000 | 4 | March 30, 2026 |

Regulatory assets under management: $2,822,437,000 in the October 2021 data and $4,821,115,000 in the October 2026 data, up 71%.
Total employees: 4 in October 2021 and 4 in October 2026.

## Changes in the filing (last 12 months)

### April 2026
- Regulatory assets under management went from $4,202,600,000 to $4,821,115,000 (+15%).

## Source

Form ADV as filed, October 2026. Values appear as filed. Cite as: AdvisorCensus. SRB Corporation (CRD 161163): Form ADV filing data as of October 2026.