Sunriver Management LLC
● SEC registered since 2015CRD 281277SEC# 801-106651Greenwich, CT
Ranks #2,778 of 6,004 private fund managers by regulatory AUM.
Reg. AUM
$1.2B
Fund GAV
$1.2B
Private funds
2
Employees
9
Accounts
7
Location
Greenwich, CT
Sunriver Management LLC assets under management
Sunriver Management LLC is an investment advisory firm registered with the SEC based in Greenwich, CT. The firm has been registered since 2015. It reports $1.2 billion in regulatory assets under management and employs 9 people. Sunriver Management LLC manages 2 private funds with combined gross assets of $1.2 billion, including Sunriver Master Fund Ltd. By regulatory assets, it ranks 2,778 of 6,004 private fund managers.
Sunriver Management LLC private funds
2 funds · $1.2B GAV| Fund | Type | Gross assets | Min. |
|---|---|---|---|
| Sunriver Master Fund Ltd | Hedge | $900.2M | $5M |
| Sunriver Long Master Fund Ltd | Hedge | $299.3M | $5M |
Sunriver Management LLC owners & executives
6 reported| Name | Title | Ownership | Since |
|---|---|---|---|
| John Nmn Stadnyk Control | Chief Operating Officer, Chief Financial Officer And Chief Compliance Officer | Under 5% | 2021 |
| Randolph Willett Cook Control | Founder And Portfolio Manager | Under 5% | 2015 |
| Sunriver Global LP Control | Managing Member | Over 75% | 2015 |
See all 6 owners & executives — unlock the full record.
Join to unlock · $37/moFrequently asked questions
How much does Sunriver Management LLC manage?
Sunriver Management LLC reports $1.2 billion in regulatory assets under management on its Form ADV.
How many private funds does Sunriver Management LLC manage?
Sunriver Management LLC manages 2 private funds with combined gross assets of $1.2 billion.
How many employees does Sunriver Management LLC have?
Sunriver Management LLC reports 9 employees.
Where is Sunriver Management LLC located?
Sunriver Management LLC is based in Greenwich, CT and has been SEC-registered since 2015.
Does Sunriver Management LLC disclose fund performance?
Sunriver Management LLC is not required to publicly disclose fund returns. Form ADV filings include assets, ownership, and service providers, shown above.
Contact & registration
| Address | 2 Sound View Drive, 2nd Floor, Greenwich, CT 06830 |
| Phone | (203) 900-3900 |
| Office hours | 9a.m. - 6p.m. |
| SEC region | Boston Regional Office (BRO) |
| CIK | 1663900 |
| Discloses disciplinary history | No |
Regulatory AUM
$1.2B▼ 2%
Mar '25Form ADV, monthlyJun '26
How this firm compares
Regulatory AUMTop 30%
Larger than 70% of 16,271 advisers
AUM vs fund managersTop 46%
Larger than 54% of 6,004 private-fund managers
Number of fundsTop 63%
More funds than 37% of fund managers
EmployeesTop 43%
More than 57% of 16,825 advisers
Assets under management
$1.2Bregulatory AUM
Discretionary $1.2B
Service providers
Auditor
Prime broker
Custodian
Administrator