Castleark Management Llc
- Regulatory AUM
- $4.6B
- Discretionary
- $4.6B
- Clients
- 66
- Avg AUM / client
- $69.5M
- Accounts
- 66
- Employees
- 28
AUM over time
Annual snapshots from Form ADV filings · as of Apr 01, 2026
Who they serve
| Client type | Clients | AUM | % of AUM |
|---|---|---|---|
| High net worth individuals | 46 | $76.8M | 1.68% |
| Investment companies | 1 | $312M | 6.8% |
| Pooled investment vehicles (non-investment companies) | 5 | $362M | 7.9% |
| Pension and profit sharing plans | 3 | $1.1B | 24.8% |
| State or municipal government entities | 11 | $2.7B | 58.9% |
Retirement plan clients
Plans that reported this firm as an investment service provider on Form 5500 Schedule C.
| Plan | Location | Plan year |
|---|---|---|
| National Roofing Industry Pension Fund National Roofing Industry Pension Fund Wilson Mcshane Corporation | 2024 | |
| Local No 731 Excavators And Pavers Pension Trust Fund Trustee Of Excv & Pvrs Local 731 Pension Trust Fund | 2024 |
People (9)
| Name | Role / title | Credentials | With firm since | Ownership |
|---|---|---|---|---|
| Castellini, Jerome, A | Managing Member, Preferred And Common | Jan 1999 (28y) | 50% – 75% | |
| Castellini, James, H | Chief Legal Officer | Oct 2004 (22y) | Less than 5% | |
| Baxter, Gregory, Peter | Member, Common Units | Jan 2013 (14y) | Less than 5% | |
| Ostrowski, Quentin, Michael | Member, Common Units | Jan 2013 (14y) | Less than 5% | |
| Stark, James, Arthur | Member, Common Units | Jan 2013 (14y) | Less than 5% | |
| Hagan, Joseph, M | Member, Preferred And Common | Jan 2018 (9y) | Less than 5% | |
| Reddi, Ajoy | Member, Preferred And Common | Jan 2018 (9y) | Less than 5% | |
| Becker, Daniel, P | Co Chief Investment Officer | May 2020 (6y) | Less than 5% | |
| Brancazio, Christopher, John | Chief Compliance Officer | Jan 2024 (3y) | Less than 5% |
Undisclosed: 0% – 50% of the firm is not attributable from the filed Schedule A bands.
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.
Retirement plans served (2)
| Plan | Sponsor | Participants | Plan assets | As of |
|---|---|---|---|---|
| National Roofing Industry Pension Fund | National Roofing Industry Pension Fund Wilson Mcshane Corporation | 14,618 | $2.1B | 01/01/2024 |
| Local No 731 Excavators And Pavers Pension Trust Fund | Trustee Of Excv & Pvrs Local 731 Pension Trust Fund | 362 | $207M | 01/01/2024 |
From Form 5500 service-provider disclosures.
Documents (1 archived)
| Form | Period | Size | |
|---|---|---|---|
| Form ADV (full filing) | 04/01/2026 | 1.07 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
- • Portfolio management for individuals/small businesses
- • Portfolio management for investment companies
- • Portfolio management for pooled investment vehicles
- • Portfolio management for businesses/institutional clients
Custody
Reported custodians
- BNY Mellon $1.7B (37% of AUM) Apr 2026
- Northern Trust $1.4B (31% of AUM) Apr 2026
- Brown Brothers Harriman & Co. $553M (12% of AUM) Apr 2026
- State Street $491M (11% of AUM) Apr 2026
Amounts as reported in ADV Item 5.K.(3) (custodians holding 10%+ of SMA assets).
Firm reports it does not have 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: Apr 01, 2026.
View current Form ADV (SEC/IAPD) ↗