John S. Connaghan

Of Counsel at Quassar Capital

I am a lawyer specialized in mergers and acquisitions, with extensive experience in complex transactions of this type and with a special focus on advising financial investors and structuring banks. Over the last few years I have advised on a very significant number of divestitures, acquisitions, mergers, investments and joint ventures, working on both the buy-side and sell-side and often on cross-border transactions.

My work focuses on advising high-volume financial investors in international asset management (including, in particular, private equity entities) across multiple asset classes (private equity, infrastructure, energy, trading and real estate) on high-level M&A transactions and associated contractual arrangements (such as management incentive plans).

Ranked in France by Chambers as "Associate to watch" in Corporate/M&A: High-end Capability and by Legal 500 as "Rising start" in Private Equity.

Lawyer, graduated with honors from Stanford University and adjunct professor in business law at Universität Basel for postgraduate studies.

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NY, United States

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Quassar Capital

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Quassar Capital is a New York–based firm founded in 2012, managing $23.6 billion in assets under a forward-looking, performance-driven mandate. We harness proprietary technology, advanced quantitative models, and deep market intelligence to uncover high-conviction opportunities across global markets. Our investment strategy integrates the analytical power of data science with the discipline of fundamental research, enabling agile, evidence-based decisions across a broad spectrum of asset classes. This unified framework is built to deliver resilient, risk-adjusted returns in an increasingly complex and fast-evolving financial landscape. At Quassar Capital, we foster a high-performance culture rooted in intellectual rigor, independent thinking, and a relentless pursuit of excellence. We value diverse perspectives and empower our teams to question assumptions, explore bold ideas, and drive meaningful innovation. We build enduring partnerships grounded in integrity, transparency, and strategic alignment—committed to delivering consistent performance and measurable results that stand the test of time. Quassar Capital, L.P. a Cabrera Capital Markets, LLC company. Contact Us: contactcenter@quassarcapital.com Careers: joaniegiroux@quassarcapital.com


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51-200

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