What Marylebone Partners does

Marylebone Partners LLP is a London-based, FCA-regulated independent investment management firm founded in 2013 that delivers fundamental active investment management to FCA-defined Professional Clients, including investment trusts, family offices, charities, trusts, and institutional investors. The firm operates with an unconstrained global remit spanning public equities, fixed income, real assets, and specialist credit (including distressed debt), and delivers its offering through three integrated strategies: direct investments in public equities, allocations to specialist third-party fund managers, and hard-to-access special investments sourced through a relationship network built over three decades. The platform combines institutional-grade investment process, risk systems, and reporting infrastructure with a client portal, and is governed by an Investment Committee chaired by a former chairman of Lansdowne Partners, with the CIO having previously led a US$8bn alternatives manager.

The firm earns revenue through recurring management fees on client portfolios and serves exclusively Professional Clients. On 12 November 2025, FCA approval was granted for Marylebone Partners to become part of Brown Advisory, a US-based investment management firm, with the team relocating to Brown Advisory's Hanover Square offices and the management fee on the Majedie Investments mandate reduced by 10 basis points simultaneously. The firm manages Majedie Investments PLC under a liquid endowment strategy (since January 2023) and is a signatory to the UN Principles for Responsible Investment, with operating geographies concentrated in the United Kingdom and explicit exclusion of the United States at present.

Name

Marylebone Partners

Legal name

Marylebone Partners LLP

Website

https://marylebonepartners.com

Company type

Private

Founded year

2013

Operating status

Operating

Headcount range

11–50 employees

Short description

Marylebone Partners LLP is a London-based, FCA-regulated investment manager founded in 2013 that delivers fundamental active investment management to professional clients, family offices, charities, trusts, and institutions. It became part of Brown Advisory in November 2025.

Ownership category

akta.pro rank

Headquarters

HQ city

London

HQ country

United Kingdom

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Technology or R&D, Marketing or Sales, Infrastructure

Revenue model

1. Investment Management Fees: Marylebone Partners earns management fees for managing investment portfolios on behalf of clients including Majedie Investments PLC. Following regulatory approval to join Brown Advisory in November 2025, management fees were reduced by 10 basis points.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels2 records

Core offering

Marylebone Partners LLP is an FCA-authorised and regulated investment management firm delivering fundamental active investment management to professional clients and institutional investors. The firm manages portfolios across an unconstrained global remit spanning public equities, fixed income, real assets, and specialist credit (including distressed debt), deployed through three core strategies: direct investments in public equities, allocations to specialist external fund managers, and hard-to-access special investments sourced via a global network built over three decades.

Product overview

Marylebone Partners LLP is a fundamental active investment management firm offering a unified suite of investment services. The core offering centers on three integrated investment strategies: direct investments in public equities, allocations to specialist third-party fund managers, and hard-to-access special investments. These strategies are delivered through institutional-grade infrastructure with a client portal for existing clients. The firm operates with an unconstrained global remit, covering public equities, fixed income, real assets, and specialist credit including distressed debt. All services are provided under FCA authorization for Alternative Investment Fund management.

Differentiator

Problem solved

Functional benefit

Products and services

• Investment Management Services FCA-authorised and regulated fundamental active investment management services delivering returns through an unconstrained global investment remit covering public equities, fixed income, real assets, and specialist credit including distressed debt, for professional clients and institutional investors.
• Direct Investments in Public Equities Direct investment strategy focused on public equities using fundamental analysis-driven stock selection, with positions chosen to be substantially independent of broader market direction and avoiding the mega-cap US stocks that dominate global benchmarks.
• Specialist Fund Allocations Allocations to specialist external fund managers selected through a global network of relationships built over three decades, providing clients with access to differentiated third-party strategies they could not easily access directly.
• Special Investments Hard-to-access special investment opportunities including unlisted assets, distressed debt, and situation-specific thematic strategies that complement public market exposures and are sourced through the firm's global network.
• Majedie Investments PLC Mandate Discretionary external investment management of Majedie Investments PLC, a UK investment trust, applying Marylebone's liquid endowment strategy with allocations across UK stocks, copper ETFs, unlisted uranium investments, and specialist fund managers.

Named customers1 record

Segments1 record

Ideal customer profiles1 record

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature2 records

Partnerships

Three partnerships are on record, tiered flagship and core.

• Brown AdvisoryflagshipStrategic or Co-development Partner · 12 November 2025On 12 November 2025, regulatory approval (FCA) was granted for Marylebone Partners to become part of Brown Advisory. The Marylebone team relocated to Brown Advisory's Hanover Square offices in London. This partnership represents a significant strategic integration where Marylebone becomes part of a larger global investment platform while maintaining its distinct investment approach and culture.
• UNPRI (UN Principles for Responsible Investment)coreStrategic or Co-development PartnerMarylebone Partners is a signatory to the UN Principles for Responsible Investment, demonstrating commitment to incorporating environmental, social, and governance (ESG) factors into their investment methodology.
• Majedie Investments PLCcoreStrategic or Co-development PartnerMarylebone Partners has managed Majedie Investments PLC since January 2023. The investment trust applies Marylebone's liquid endowment strategy with allocations across UK stocks, copper ETFs, unlisted uranium investments, and specialist fund managers.

Scale indicators10 records

Recent moves6 records

Expansion highlights5 records

Broad incumbents

• Capital Group: Large global active investment manager with multi-decade fundamental research heritage. Relevant comparable for Marylebone's fundamental, multi-strategy global equities approach and institutional client distribution.
• Brown Advisory: Marylebone Partners' new parent post-November 2025 FCA approval. Brown Advisory is a US-headquartered independent investment manager with broad global equities, fixed income and multi-asset capabilities; highly comparable as the integrating platform for Marylebone's liquid endowment and active equity strategies.
• Baillie Gifford: Edinburgh-based active investment manager with fundamental global and growth strategies serving institutional and intermediary clients globally. Comparable on fundamental active approach and unconstrained global investment philosophy, though at much larger scale.

Direct peers

• Ruffer LLP: London-based boutique active investment manager focused on capital preservation and absolute returns across multi-asset portfolios. Highly comparable to Marylebone's fundamental, contrarian approach serving private clients, charities and institutions.
• Lansdowne Partners: London-based specialist investment manager founded on a fundamental long-short equity heritage, where Marylebone Investment Committee Chair Stuart Roden was previously Chairman. Highly comparable on talent pedigree and active equity remit.
• J O Hambro Capital Management: London-based boutique active equity manager offering fundamental global, regional and specialist strategies to institutional and intermediary clients. Closely comparable in target market, boutique scale and active fundamental approach.
• Sloane Robinson: London-based fundamental active manager where Marylebone's Head of Investment Operations and Fund Administrator previously worked. Comparable on talent pipeline, fundamental active process and institutional client focus.
• RIT Capital Partners: London-listed investment trust with a fundamental, unconstrained global investment remit managed by an external manager; directly comparable to Majedie Investments PLC, the trust Marylebone manages, and aligned with Marylebone's liquid endowment philosophy.
• Waverton Investment Management: UK boutique offering active multi-asset, equity and fixed income strategies to private clients, charities and institutions. Directly comparable to Marylebone's liquid endowment model and UK institutional client base.
• Troy Asset Management: UK boutique active manager with a value-oriented, contrarian approach across equities and multi-asset strategies. Comparable to Marylebone in size, philosophy and client base of UK institutions, charities and family offices.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/marylebone-partners-llp

Revenue estimate

Valuation estimate

Number of profiles

Profiles14 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Marylebone Partners