Srb Corporation
- Regulatory AUM
- $4.8B
- Discretionary
- $4.8B
- Clients
- 20
- Avg AUM / client
- $241M
- Accounts
- 22
- Employees
- 4
AUM over time
Annual snapshots from Form ADV filings · as of Mar 30, 2026
Who they serve
| Client type | Clients | AUM | % of AUM |
|---|---|---|---|
| Insurance companies | 20 | $4.6B | 95.2% |
| Corporations and other businesses | Fewer than 5 clients | $229M | 4.76% |
People (5)
| Name | Role / title | Credentials | With firm since | Ownership |
|---|---|---|---|---|
| Stone, James, Martin | Shareholder | Dec 1982 (44y) | ≈ 18.75% – 50% via The Plymouth Rock Company Incorporated | |
| Bailey, James, Nathan | Director | Jun 1987 (39y) | Less than 5% | |
| Childs, Frederick, Carter | Director And Chief Compliance Officer | Aug 1999 (27y) | Less than 5% | |
| Hartranft, William, Daniel | Director | Jun 2018 (8y) | Less than 5% | |
| Mcelwee, Andrew, Allison | Director | Feb 2022 (5y) | Less than 5% |
Entity owners (Schedule A/B)
| Entity | Title / status | Since | Sch. | Ownership |
|---|---|---|---|---|
| The Plymouth Rock Company Incorporated | Shareholder | Jun 1987 | A | 75% or more |
| Central Securities Corporation | Shareholder | Dec 1982 | B | ≈ 18.75% – 50% via The Plymouth Rock Company Incorporated |
Undisclosed: 0% – 25% of the firm is not attributable from the filed Schedule A bands.
Estimated effective ownership (look-through of filed bands):
- Stone, James, Martin: 25% – 50% of The Plymouth Rock Company Incorporated × 75% – 100% direct ≈ 18.75% – 50% of the firm
- Central Securities Corporation: 25% – 50% of The Plymouth Rock Company Incorporated × 75% – 100% direct ≈ 18.75% – 50% of the firm
Roster from the IAPD representatives feed; ownership and acquisition dates from Form ADV Schedule A/B. "Since" is the earliest filed registration or acquisition date.
Documents (1 archived)
| Form | Period | Size | |
|---|---|---|---|
| Form ADV (full filing) | 03/30/2026 | 1.34 MB | View · PDF · Source ↗ |
Archived copies of the firm's regulatory filings, versioned by content hash.
Disciplinary disclosures
No disciplinary events reported on the firm's latest Form ADV filing.
How they charge
- • Percentage of assets under management
Services
- • Other services
Custody
Reported custodians
- Northern Trust $3.9B (80% of AUM) Mar 2026
- J.P. Morgan $1.0B (42% of AUM) Mar 2019
Amounts as reported in ADV Item 5.K.(3) (custodians holding 10%+ of SMA assets).
Firm reports having custody of client funds or securities (Item 9.A).
Source
All data on this page comes from this firm's Form ADV filings, reproduced without modification. Latest filing: Mar 30, 2026.
View current Form ADV (SEC/IAPD) ↗