Investment adviser · CRD 150522

ONE WILLIAM STREET CAPITAL MANAGEMENT, LP.

Investment adviser filing (IA)

NEW YORK, NY, United States · Form ADV filed Mar 31, 2026

Regulatory AUM
$11.3B
Form ADV · Item 5.F
Client accounts
22
Accounts, not individual clients
Employees
124
Reported in this filing
Advisory professionals
62
Investment advisory functions

Who they report serving

Form ADV · Item 5.D

Client types and their share of reported regulatory assets.

Client typeClientsRegulatory assetsShare of AUM
Pooled investment vehicles21$11,300,174,677100.0%
Retirement plansFewer than 5$2,309,9450.0%
Filing source

Form ADV 2076112 · Mar 31, 2026 · Item 5.D

Official IAPD profile (latest public filing). Values are the most recently reported in our imported data; the public profile may show a newer filing.

Private funds & service providers

18 Private funds

The count excludes feeder funds. Funds in the latest filing appear first, ordered by reported gross assets. Earlier funds retain their last reported values.

ONE WILLIAM STREET CAPITAL MASTER FUND, LTD.Hedge Fund · Last reported Mar 31, 2026$6.19BGross asset value

Feeder funds

Fund administrator NORTHERN TRUST GLOBAL FUND SERVICES CAYMAN LIMITED GRAND CAYMAN, Cayman Islands Investor statements: Yes (provided to all investors) Related to adviser: No
Fund administrator NORTHERN TRUST HEDGE FUND SERVICES, LLC CHICAGO, Illinois, United States Investor statements: Yes (provided to all investors) Related to adviser: No
Auditor ERNST & YOUNG LLP CHICAGO, Illinois, United States
Auditor ERNST & YOUNG LTD. GRAND CAYMAN, Cayman Islands
Custodian J.P. MORGAN CHASE BANK NA NEW YORK, New York, United States Related to adviser: No
Custodian THE BANK OF NEW YORK MELLON NEW YORK, New York, United States Related to adviser: No
Custodian THE NORTHERN TRUST COMPANY CHICAGO, Illinois, United States Related to adviser: No
Marketer MORGAN STANLEY NEW YORK, New York, United States Related to adviser: No
Marketer PNC BANK, NATIONAL ASSOCIATION NEW YORK, New York, United States Related to adviser: No
Marketer STIFEL, NICOLAUS & COMPANY, INCORPORATED ST. LOUIS, Missouri, United States Related to adviser: No
Prime broker BARCLAYS CAPITAL INC. NEW YORK, New York, United States
Prime broker J.P. MORGAN CLEARING CORP. NEW YORK, New York, United States
Prime broker J.P. MORGAN SECURITIES LLC NEW YORK, New York, United States
Provider details
Annual audit
Yes
Prime brokers
Yes
Custodians
Yes
Administrator other than the adviser
Yes
External marketing
Yes

ERNST & YOUNG LLP
PCAOB 42

ERNST & YOUNG LTD.
PCAOB 1655

J.P. MORGAN CHASE BANK NA
LEI 7H6GLXDRUGQFU57RNE97

THE BANK OF NEW YORK MELLON
LEI HPFHU0OQ28E4N0NFVK49

THE NORTHERN TRUST COMPANY
LEI 6PTKHDJ8HDUF78PFWH30

MORGAN STANLEY
CRD 149777 · SEC 801-70103

STIFEL, NICOLAUS & COMPANY, INCORPORATED
CRD 793 · SEC 801-10746

BARCLAYS CAPITAL INC.
CRD 19714 · SEC 8-41342

J.P. MORGAN CLEARING CORP.
CRD 28432 · SEC 8-43724

J.P. MORGAN SECURITIES LLC
CRD 79 · SEC 8-35008

Fund details & source
Fund ID
805-9360747329
Reported beneficial owners
303
Minimum commitment
$250K
Form D file number
021-118148
Form D file number
021-121175
Form D file number
021-121176
Form D file number
021-201381

Form ADV 2076112 · Mar 31, 2026 · Schedule D 7.B.(1)

Official IAPD profile (latest public filing). Values are the most recently reported in our imported data; the public profile may show a newer filing.

OWS CREDIT OPPORTUNITY MASTER FUND, LTD.Hedge Fund · Last reported Mar 31, 2026$2BGross asset value

Feeder funds

Fund administrator NORTHERN TRUST GLOBAL FUND SERVICES CAYMAN LIMITED GRAND CAYMAN, Cayman Islands Investor statements: Yes (provided to all investors) Related to adviser: No
Fund administrator NORTHERN TRUST HEDGE FUND SERVICES LLC CHICAGO, Illinois, United States Investor statements: Yes (provided to all investors) Related to adviser: No
Auditor ERNST & YOUNG LLP CHICAGO, Illinois, United States
Auditor ERNST & YOUNG LTD. GRAND CAYMAN, Cayman Islands
Custodian THE BANK OF NEW YORK MELLON NEW YORK, New York, United States Related to adviser: No
Custodian THE NORTHERN TRUST COMPANY CHICAGO, Illinois, United States Related to adviser: No
Marketer MORGAN STANLEY NEW YORK, New York, United States Related to adviser: Yes
Prime broker BARCLAYS CAPITAL INC. NEW YORK, New York, United States
Prime broker J.P. MORGAN CLEARING CORP. NEW YORK, New York, United States
Prime broker J.P. MORGAN SECURITIES LLC NEW YORK, New York, United States
Provider details
Annual audit
Yes
Prime brokers
Yes
Custodians
Yes
Administrator other than the adviser
Yes
External marketing
Yes

ERNST & YOUNG LLP
PCAOB 42

ERNST & YOUNG LTD.
PCAOB 1655

THE BANK OF NEW YORK MELLON
LEI HPFHU0OQ28E4N0NFVK49

THE NORTHERN TRUST COMPANY
LEI 6PTKHDJ8HDUF78PFWH30

MORGAN STANLEY
CRD 149777 · SEC 801-70103

BARCLAYS CAPITAL INC.
CRD 19714 · SEC 8-41342

J.P. MORGAN CLEARING CORP.
CRD 28432 · SEC 8-43724

J.P. MORGAN SECURITIES LLC
CRD 79 · SEC 8-35008

Fund details & source
Fund ID
805-3282428066
Reported beneficial owners
183
Minimum commitment
$100K
Form D file number
021-154991
Form D file number
021-161009
Form D file number
021-249650
Form D file number
021-253136
Form D file number
021-388542

Form ADV 2076112 · Mar 31, 2026 · Schedule D 7.B.(1)

Official IAPD profile (latest public filing). Values are the most recently reported in our imported data; the public profile may show a newer filing.

OWS LSAR MASTER FUND, L.P.Hedge Fund · Last reported Mar 31, 2026$1.05BGross asset value

Feeder funds

Fund administrator NORTHERN TRUST GLOBAL FUND SERVICES CAYMAN LIMITED GRAND CAYMAN, Cayman Islands Investor statements: Yes (provided to all investors) Related to adviser: No
Auditor ERNST & YOUNG LTD. GRAND CAYMAN, Cayman Islands
Custodian THE BANK OF NEW YORK MELLON NEW YORK, New York, United States Related to adviser: No
Custodian THE NORTHERN TRUST COMPANY CHICAGO, Illinois, United States Related to adviser: No
Prime broker BARCLAYS CAPITAL INC. NEW YORK, New York, United States
Prime broker J.P. MORGAN CLEARING CORP. NEW YORK, New York, United States
Prime broker J.P. MORGAN SECURITIES LLC NEW YORK, New York, United States
Provider details
Annual audit
Yes
Prime brokers
Yes
Custodians
Yes
Administrator other than the adviser
Yes
External marketing
No

ERNST & YOUNG LTD.
PCAOB 1655

THE BANK OF NEW YORK MELLON
LEI HPFHU0OQ28E4N0NFVK49

THE NORTHERN TRUST COMPANY
LEI 6PTKHDJ8HDUF78PFWH30

BARCLAYS CAPITAL INC.
CRD 19714 · SEC 8-41342

J.P. MORGAN CLEARING CORP.
CRD 28432 · SEC 8-43724

J.P. MORGAN SECURITIES LLC
CRD 79 · SEC 8-35008

Fund details & source
Fund ID
805-8455602875
Reported beneficial owners
25
Minimum commitment
$100K
Form D file number
021-505451

Form ADV 2076112 · Mar 31, 2026 · Schedule D 7.B.(1)

Official IAPD profile (latest public filing). Values are the most recently reported in our imported data; the public profile may show a newer filing.

OWS ABS MASTER FUND II, LPHedge Fund · Last reported Mar 31, 2026$866MGross asset value

Feeder funds

  • OWS ABS FUND II, LTD.
Fund administrator NORTHERN TRUST GLOBAL FUND SERVICES CAYMAN LIMITED GRAND CAYMAN, Cayman Islands Investor statements: Yes (provided to all investors) Related to adviser: No
Auditor ERNST & YOUNG LTD. GRAND CAYMAN, Cayman Islands
Custodian THE BANK OF NEW YORK MELLON NEW YORK, New York, United States Related to adviser: No
Custodian THE NORTHERN TRUST COMPANY CHICAGO, Illinois, United States Related to adviser: No
Prime broker BARCLAYS CAPITAL INC. NEW YORK, New York, United States
Prime broker J.P. MORGAN CLEARING CORP. NEW YORK, New York, United States
Prime broker J.P. MORGAN SECURITIES LLC NEW YORK, New York, United States
Provider details
Annual audit
Yes
Prime brokers
Yes
Custodians
Yes
Administrator other than the adviser
Yes
External marketing
No

ERNST & YOUNG LTD.
PCAOB 1655

THE BANK OF NEW YORK MELLON
LEI HPFHU0OQ28E4N0NFVK49

THE NORTHERN TRUST COMPANY
LEI 6PTKHDJ8HDUF78PFWH30

BARCLAYS CAPITAL INC.
CRD 19714 · SEC 8-41342

J.P. MORGAN CLEARING CORP.
CRD 28432 · SEC 8-43724

J.P. MORGAN SECURITIES LLC
CRD 79 · SEC 8-35008

Fund details & source
Fund ID
805-3387612917
Reported beneficial owners
1
Minimum commitment
$100K

Form ADV 2076112 · Mar 31, 2026 · Schedule D 7.B.(1)

Official IAPD profile (latest public filing). Values are the most recently reported in our imported data; the public profile may show a newer filing.

OWS ABS IV, LPHedge Fund · Last reported Mar 31, 2026$766MGross asset value

Form D fundraising filings

OWS ABS IV, L.P.

Fund administrator NORTHERN TRUST HEDGE FUND SERVICES LLC CHICAGO, Illinois, United States Investor statements: Yes (provided to all investors) Related to adviser: No
Auditor DELOITTE & TOUCHE LLP NEW YORK, New York, United States
Custodian THE BANK OF NEW YORK MELLON NEW YORK, New York, United States Related to adviser: No
Custodian THE NORTHERN TRUST COMPANY CHICAGO, Illinois, United States Related to adviser: No
Prime broker BARCLAYS CAPITAL INC. NEW YORK, New York, United States
Prime broker J.P. MORGAN CLEARING CORP. NEW YORK, New York, United States
Prime broker J.P. MORGAN SECURITIES LLC NEW YORK, New York, United States
Provider details
Annual audit
Yes
Prime brokers
Yes
Custodians
Yes
Administrator other than the adviser
Yes
External marketing
No

DELOITTE & TOUCHE LLP
PCAOB 34

THE BANK OF NEW YORK MELLON
LEI HPFHU0OQ28E4N0NFVK49

THE NORTHERN TRUST COMPANY
LEI 6PTKHDJ8HDUF78PFWH30

BARCLAYS CAPITAL INC.
CRD 19714 · SEC 8-41342

J.P. MORGAN CLEARING CORP.
CRD 28432 · SEC 8-43724

J.P. MORGAN SECURITIES LLC
CRD 79 · SEC 8-35008

Fund details & source
Fund ID
805-6082862049
Reported beneficial owners
1
Minimum commitment
$5M
Form D file number
021-301914

Form ADV 2076112 · Mar 31, 2026 · Schedule D 7.B.(1)

Official IAPD profile (latest public filing). Values are the most recently reported in our imported data; the public profile may show a newer filing.

OWS ABS FUND VIII, LTD.Hedge Fund · Last reported Mar 31, 2026$378MGross asset value

Form D fundraising filings

OWS ABS Fund VIII, Ltd.

Fund administrator NORTHERN TRUST GLOBAL FUND SERVICES CAYMAN LIMITED GRAND CAYMAN, Cayman Islands Investor statements: Yes (provided to all investors) Related to adviser: No
Auditor DELOITTE & TOUCHE LLP GRAND CAYMAN, Cayman Islands
Custodian THE BANK OF NEW YORK MELLON NEW YORK, New York, United States Related to adviser: No
Provider details
Annual audit
Yes
Prime brokers
No
Custodians
Yes
Administrator other than the adviser
Yes
External marketing
No

DELOITTE & TOUCHE LLP
PCAOB 34

THE BANK OF NEW YORK MELLON
LEI HPFHU0OQ28E4N0NFVK49

Fund details & source
Fund ID
805-6248643758
Reported beneficial owners
13
Minimum commitment
$100K
Form D file number
021-512625

Form ADV 2076112 · Mar 31, 2026 · Schedule D 7.B.(1)

Official IAPD profile (latest public filing). Values are the most recently reported in our imported data; the public profile may show a newer filing.

OWS AFFIRM PARTNERSHIP FUND, LTD.Private Equity Fund · Last reported Mar 31, 2026$51.5MGross asset value

Form D fundraising filings

OWS Affirm Partnership Fund, Ltd.

Fund administrator NORTHERN TRUST GLOBAL FUND SERVICES CAYMAN LIMITED GRAND CAYMAN, Cayman Islands Investor statements: Yes (provided to all investors) Related to adviser: No
Auditor ERNST & YOUNG LTD. GRAND CAYMAN, Cayman Islands
Custodian THE NORTHERN TRUST COMPANY GRAND CAYMAN, Cayman Islands Related to adviser: No
Provider details
Annual audit
Yes
Prime brokers
No
Custodians
Yes
Administrator other than the adviser
Yes
External marketing
No

ERNST & YOUNG LTD.
PCAOB 1655

THE NORTHERN TRUST COMPANY
LEI 6PTKHDJ8HDUF78PFWH30

Fund details & source
Fund ID
805-3958603823
Reported beneficial owners
3
Minimum commitment
$5M
Form D file number
021-549884

Form ADV 2076112 · Mar 31, 2026 · Schedule D 7.B.(1)

Official IAPD profile (latest public filing). Values are the most recently reported in our imported data; the public profile may show a newer filing.

Services & filing details

Most recent filing: Mar 31, 2026. View historical filings

Reported services

Pooled investment vehicle management · Business portfolio management

Compensation

Percentage of assets · Performance-based

Principal office

299 PARK AVENUE, 25TH FLOOR
NEW YORK, NY, 10171, United States

CRD 150522

Filing source

Form ADV 2076112 · Mar 31, 2026 · Items 1 & 5

Official IAPD profile (latest public filing). Values are the most recently reported in our imported data; the public profile may show a newer filing.