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Diameter Capital Partners
Diameter Capital Partners was founded in 2017 by Scott Goodwin and Jonathan Lewinsohn as an alternative asset manager focused on global credit markets.
Diameter Capital Partners
Diameter Capital Partners was founded in 2017 by Scott Goodwin and Jonathan Lewinsohn as an alternative asset manager focused on global credit markets. The firm's origins trace to the founders' experience in credit investing, though the specific wealth origin of its principals is not publicly disclosed. The firm deploys capital across public and private credit, including hedged strategies, direct lending, CLOs/CDOs, and opportunistic strategies like its Diameter Dynamic Credit and Capital Solutions vehicles. Its investment philosophy combines fundamental research with technical trading and risk analytics to target opportunities from investment grade to distressed. The firm operates across North America and Europe, with offices in New York, London, and West Palm Beach. Diameter raised $4.5 billion in new commitments for its dislocation strategy in November 2025, surpassing its hard cap (per firm website, November 2025). The firm employs a flat structure for streamlined decision-making, and its team includes research professionals who have appeared on the Goldman Sachs Exchanges podcast (December 2025). Additional offices are located in London and West Palm Beach. Diameter's structural differentiator is its hybrid credit platform that marries long/short trading with direct lending and structured credit under one roof, allowing it to pivot between public and private markets based on relative value. This broad mandate, combined with a size constrained to stay nimble, creates a flexibility uncommon among credit specialists.
General information
Firm type
Asset Manager
Year founded
2017
AUM
Undisclosed
Location
Region
North America
Country
United States
City
New York
Corporate office
New York, NY, United States
Additional offices
London, United Kingdom · West Palm Beach, FL, United States
Principals
Scott Goodwin
Co-Founder
Jonathan Lewinsohn
Co-Founder
Sector focus
Frequently asked questions
Who runs investment decisions at Diameter Capital Partners?
Scott Goodwin and Jonathan Lewinsohn co-founded the firm in 2017 and lead investment decisions. The firm describes a flat structure for streamlined decision-making, with sector expertise leveraged across sub-strategies (per firm website).
How does Diameter Capital Partners source proprietary deal flow?
The firm combines fundamental research with technical trading expertise and active engagement with capital markets to source opportunities. Its broad mandate across public and private credit allows it to evaluate relative value across asset classes and capital structures (per firm website).
Is Diameter Capital Partners structured as a single family office or does it operate like a credit firm?
Diameter Capital Partners is an alternative asset manager, not a family office. It manages capital for a wide range of limited partners through diversified credit strategies, including direct lending, CLOs, and hedged strategies (per firm website).
Does Diameter Capital Partners participate in fund commitments or only direct deals?
The firm invests across both funds and direct deals, operating strategies such as direct lending (originated senior secured loans) and CLOs (actively managed portfolios of leveraged loans and bonds), as well as opportunistic long-only credit (per firm website).
What investment stages does Diameter Capital Partners typically target?
The firm invests across the credit spectrum from investment grade to distressed, in both public and private markets. Its strategies cover new issuance, micro-cyclical/thematic dislocations, and broader macro cycles (per firm website).
Which sectors does Diameter Capital Partners explicitly avoid?
The firm does not publicly disclose sectors it avoids. Its website emphasizes a broad mandate across all credit sectors, with sector expertise leveraged across sub-strategies.
Where does the underlying wealth come from at Diameter Capital Partners?
The firm does not publicly disclose the wealth origin of its principals or its limited partners. The firm manages third-party capital as an alternative asset manager, not a family office.
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