Marylebone Partners LLP

Overview

Marylebone Partners LLP is an independent investment manager based in London, founded in 2013. The firm specializes in managing investments for families, charities, endowments, trusts, and private investors, focusing on delivering superior investment outcomes through relationships built on trust and transparency. Their investment approach is fundamental and active, seeking to capitalize on opportunities arising from macroeconomic uncertainties, technical distortions, and short-termism in the market. They have a global remit, with public equities at the core of their strategy, complemented by investments in fixed income, real assets, and specialist credit, including distressed debt. The firm's investment process is characterized by a repeatable methodology that combines fundamental analysis with subjective judgment. They source investment ideas through a global network of external managers, situation-specific, and thematic strategies. This approach aims to deliver strong and repeatable returns for clients across various market conditions. Risk management and sustainability considerations are integral to their investment methodology, and they are signatories to the United Nations Principles for Responsible Investment (UNPRI). In June 2025, Marylebone Partners announced that it had received regulatory approval to join Brown Advisory, a move intended to enhance their endowment-style investment offerings for clients outside the United States. This partnership aims to combine the strengths of both firms, providing a broader range of investment opportunities and strategies to meet the evolving needs of their clients. The transaction was completed in November 2025, marking a significant milestone in the firm's growth and expansion.