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One William Street Capital Management

One William Street Capital Management

New York City, New Yorkonewilliamstreet.com

Overview

One William Street Capital Management is a New York-based registered investment adviser that manages multiple investment strategies focused primarily on asset-based and structured credit opportunities in North America and Europe.

Year Founded

2008

Portfolio Companies

2

Investments

One William Street Capital Management investments
CompanyDateStageLead
ParafinJun 2026DebtCo-investor
Jonas Group EntertainmentJul 2025DebtCo-investor

Key People

Karen Bianco

Office of the Founder CEO

Josh Simons

Partner & Co-President

David Sherr

Managing Partner

John Nusbaum

Managing Director & Portfolio Manager

Rahul Pande

Portfolio Manager and Managing Director

Laurence Lee

Chief Risk Officer and Partner

Kaushik Murali

Deputy CIO and Partner

Claire Wu

Vice President, Structured Credit Investing

George Morriss

Member Principal Transactions Committee

Peggy Eisen

Member, Principal Transactions Committee

Albert Selius

Portfolio Manager

Alex Saporito

Portfolio Manager

Anthony Barwacz

Portfolio Manager

Christos Vlachos

Associate Portfolio Manager

Daniel Montano

Portfolio Manager

Frank Prezioso

Partner and Senior Portfolio Manager

Sector & Stage Mix

Industry, funding stage, and valuation band breakdowns.

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SeedSeries ASeries BGrowth

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Investment Activity

Yearly cadence, pace, and funding raised over time.

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2021
2022
2023
2024
2025
2026

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FAQ

Firmographic Details

HeadquartersNew York City, New York
Year Founded2008

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