One William Street Capital Management, LP.
● SEC registered since 2009CRD 150522SEC# 801-70264New York, NY
Ranks #798 of 6,004 private fund managers by regulatory AUM.
Reg. AUM
$11.3B
Fund GAV
$11.3B
Private funds
8
Employees
124
Accounts
22
Location
New York, NY
One William Street Capital Management, LP. assets under management
One William Street Capital Management, LP. operates as an SEC-registered investment adviser based in New York, NY. The firm has been registered since 2009. It reports $11.3 billion in regulatory assets under management and employs 124 people. One William Street Capital Management, LP. manages 8 private funds with combined gross assets of $11.3 billion, including One William Street Capital Master Fund, Ltd. By regulatory assets, it ranks 798 of 6,004 private fund managers.
One William Street Capital Management, LP. private funds
8 funds · $11.3B GAV| Fund | Type | Gross assets | Min. |
|---|---|---|---|
| One William Street Capital Master Fund, Ltd. | Hedge | $6.19B | $250K |
| Ows Credit Opportunity Master Fund, Ltd. | Hedge | $2B | $100K |
| Ows Lsar Master Fund, L.P. | Hedge | $1.05B | $100K |
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Join to unlock · $37/moOne William Street Capital Management, LP. owners & executives
21 reported| Name | Title | Ownership | Since |
|---|---|---|---|
| Arthur Constantine Damoulakis Control | Chief Compliance Officer | Under 5% | 2025 |
| Christopher Robinson Epes Control | Chief Legal Officer | Under 5% | 2008 |
| Crystal Kelyn Frumberg Control | Chief Financial Officer | Under 5% | 2025 |
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Join to unlock · $37/moFrequently asked questions
How much does One William Street Capital Management, LP. manage?
One William Street Capital Management, LP. reports $11.3 billion in regulatory assets under management on its Form ADV.
How many private funds does One William Street Capital Management, LP. manage?
One William Street Capital Management, LP. manages 8 private funds with combined gross assets of $11.3 billion.
How many employees does One William Street Capital Management, LP. have?
One William Street Capital Management, LP. reports 124 employees.
Where is One William Street Capital Management, LP. located?
One William Street Capital Management, LP. is based in New York, NY and has been SEC-registered since 2009.
Does One William Street Capital Management, LP. disclose fund performance?
One William Street Capital Management, LP. is not required to publicly disclose fund returns. Form ADV filings include assets, ownership, and service providers, shown above.
Contact & registration
| Address | 299 Park Avenue, 25th Floor, New York, NY 10171 |
| Phone | 212-957-2500 |
| Fax | 212-259-2106 |
| Office hours | 8a.m. - 6p.m. |
| SEC region | New York Regional Office (NYRO) |
| Discloses disciplinary history | No |
Regulatory AUM
$11.3B▲ 5%
Mar '25Form ADV, monthlyJun '26
How this firm compares
Regulatory AUMTop 8%
Larger than 92% of 16,271 advisers
AUM vs fund managersTop 13%
Larger than 87% of 6,004 private-fund managers
Number of fundsTop 30%
More funds than 70% of fund managers
EmployeesTop 6%
More than 94% of 16,825 advisers
Assets under management
$11.3Bregulatory AUM
Discretionary $11.3B
Fund type mix
Hedge6
Private Equity2
Service providers
Auditor
Prime broker
Custodian
Administrator