Tresidor Investment Management LLP is a London-based alternative investment manager that uses a disciplined fundamental research process to make long and short investments across the full spectrum of tradeable European credit


Tresidor is authorised and regulated by the Financial Conduct Authority in the United Kingdom (No. 825420)



Our name comes from the Swedish for “three-sided”, reflecting the active debate between three different perspectives that we believe results in the most informed (and least biased) investment decisions



Led by CIO Michael Phelps and CEO Edgar Senior, Tresidor has a 15-strong team, including 10 dedicated investment professionals, focused exclusively on fundamental investing across European credit markets


Michael Phelps, CIO

Michael is the Founder, Managing Partner and Chief Investment Officer of Tresidor, responsible for investments, investment process and investment team.

Until December 2017 he was Head of European Credit for BlackRock and the Lead Portfolio Manager for European Leveraged Finance and Credit Alternative Portfolios, overseeing $35bn in European credit investments.

Prior to joining BlackRock in 2009, Michael was a Partner and Head of European Businesses for R3 Capital Partners, a $2.2bn global credit fund that spun out from Lehman Brothers in May 2008. Earlier he worked for Lehman as Head of Global Principal Strategies’ European operations, having joined Lehman in 2006 to manage a US credit and distressed debt portfolio.

Before that, Michael had worked in J.P. Morgan’s Proprietary Positioning Business where he was responsible for the US single name credit and distressed portfolios.

He started his career in 1997 within J.P. Morgan’s M&A team and has a MA in Economics from the University of Cambridge.

Edgar Senior, CEO

Edgar is the Managing Partner and Chief Executive Officer of Tresidor, responsible for all non-investment activities including operations, legal and compliance, and marketing & investor relations. Edgar has 20 years of experience across credit markets and hedge funds, and has known Michael for a decade, since advising him on the launch of R3.

Edgar started his career in 1997 in J.P. Morgan’s credit derivatives structuring team and later moved to Goldman Sachs where he became Head of Synthetic CDO structuring and marketing for North America, and afterwards led European fund-linked product structuring.

In 2007 Edgar moved to Credit Suisse as a Managing Director and Global Co-Head of the Capital Services business, and was part of the global Prime Services Management Committee. He left Credit Suisse in 2012 to write a novel, which he self-published on behalf of a charity, and returned to the markets in 2014 as Head of Product Development for Source, a $20bn asset manager that was Europe’s largest pure-play ETF issuer. Until September 2018 he was Head of Business Development, Talent and Strategy for Marble Bar Asset Management.

Edgar has a first-class degree in law from University College Dublin and an MBA from INSEAD.



Our culture puts ethics and investors first, and emphasises a collaborative, performance-focused environment that balances the pursuit of excellence with humility

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Please check back in future for our investor portal, where current and prospective investors will be able to access offering documents, marketing materials, and performance updates 



Office: 55 New Bond Street, London W1S 1DG, United Kingdom