Ranking: Top 20 Family Offices in London

London is one of the two or three most concentrated family office markets in the world, and it is also one of the least transparent. Family offices exist precisely to manage private wealth privately: most publish nothing, disclose no assets under management, and have no interest in being ranked. That makes any list of this kind a description of the landscape rather than a league table, and this one is presented on that basis.

What follows is an overview of twenty prominent family offices and family office service providers with a significant London presence, grouped by what they actually are — because the sector contains several distinct business models that are frequently, and unhelpfully, lumped together. It is written for people who work in or alongside the sector: principals considering how to structure their own arrangements, professionals considering a move into it, and boards trying to understand who does what.

A note on how to read this list

This is not a ranking by assets under management, investment performance or any other quantitative measure, and any list that claims to be should be treated sceptically. Family offices do not publish AUM. Single-family offices have no regulatory obligation to disclose it and no commercial reason to. Multi-family offices occasionally indicate scale in press coverage, but the figures are self-reported, inconsistently defined, and rarely current.

Nor is it a quality judgement. Whether a family office is well run depends on how well it serves the specific family it exists for, which is not something an outside observer can assess.

What the list does offer is an accurate description of who operates in this market, what business model each represents, and what that means for anyone working in or hiring into the sector. Where firms have merged, been acquired or rebranded, that is noted — the London family office market has consolidated considerably over the past decade and a good deal of published material about it is out of date.

What a family office actually is

A family office is a private organisation established to manage the wealth and affairs of one family, or a small group of families. The core functions typically include investment management, tax and estate structuring, philanthropy, governance, and in many cases the administration of property, aircraft, art collections and other private assets.

The distinction that matters most in practice is between the two principal models.

Single-family offices

A single-family office (SFO) serves one family exclusively. It is a private business, usually established after a liquidity event — the sale of an operating company, or a generational transfer — and it exists to preserve and grow capital across generations rather than to sell services.

SFOs vary enormously in scale. At one end sits a small team managing a portfolio and a property interest; at the other, an organisation of a hundred or more people running direct investments, an operating business portfolio and a large property estate. The largest UK examples are effectively investment institutions in their own right.

For anyone considering working in one, the defining features are the long time horizon, the direct relationship with the principal or family council, and the absence of the reporting apparatus that governs institutional asset management. Decisions are made quickly and with less process — which suits some people and frustrates others.

Multi-family offices

A multi-family office (MFO) provides family office services to a number of unrelated families on a commercial basis. It is a business with clients, and it is typically regulated by the Financial Conduct Authority for the investment services it provides.

MFOs arose partly because running a genuine single-family office is expensive — the conventional rule of thumb is that it becomes economically sensible somewhere above £200m to £250m of investable assets, though the figure varies widely with complexity. Below that threshold, families frequently buy the capability rather than build it.

Several of the largest UK MFOs began life as single-family offices that opened their services to other families — a pattern that recurs internationally and explains some of the sector’s unusual culture.

Why London

Four factors concentrate family office activity in London, and they reinforce one another.

Professional infrastructure. The advisory ecosystem a family office depends on — private client law, trust and estate expertise, tax structuring, custody, private banking — is denser in London than almost anywhere. A family office can assemble a full advisory bench within a mile of St James’s.

Capital markets access. Proximity to fund managers, private equity houses, brokers and deal flow. For family offices making direct investments — an increasing proportion — that access matters more than it did when the model was predominantly one of allocating to external managers.

Time zone and language. London’s working day overlaps meaningfully with both Asia and North America, which matters for families with genuinely international interests.

And history. Several of the UK’s largest family fortunes have been administered from London for generations, and the institutions that grew up to serve them — private banks, land agents, trustees — are still here.

The counterweight, and it is a real one, is that changes to the UK’s tax treatment of non-domiciled individuals have prompted some internationally mobile families to review their arrangements. Dubai, Singapore, Switzerland and Milan have all attracted attention as alternatives. Whether that represents a genuine shift or a repricing at the margin is not yet clear.

Single-family offices and principal investment vehicles

These organisations exist to manage the wealth of one family. Several are among the largest private investors in the UK.

1. Grosvenor. The Grosvenor family’s interests, including the Grosvenor property business and Wheatsheaf, its food and agriculture investment arm. One of the longest-established private estates in the UK, with major holdings in Mayfair and Belgravia alongside international property and direct investments.

2. Cadogan. The Cadogan family’s estate, centred on a significant property holding in Chelsea and Knightsbridge. A property-led family enterprise with a professional executive team and a long-standing governance structure.

3. Reuben Brothers. The investment vehicle of David and Simon Reuben, active across property, private equity, technology and data centres. Among the most acquisitive private investors in the UK market.

4. Wittington Investments. The Weston family’s principal UK holding company, with interests including Associated British Foods and, historically, Fortnum & Mason. A family holding company rather than a conventional family office, but one that performs many of the same functions.

5. B-Flexion. Formerly Waypoint Capital, the investment organisation of the Bertarelli family, with activity across life sciences, asset management and property. Geneva-headquartered with a London presence.

6. RIT Capital Partners. Worth including with a clear caveat: RIT is a London-listed investment trust rather than a family office, though it originated from and remains associated with Rothschild family interests. It is frequently discussed alongside family offices because of that lineage and its multi-asset, long-horizon approach.

Multi-family offices

Businesses providing family office services to several unrelated families.

7. Stonehage Fleming. Formed by the 2014 merger of Stonehage and Fleming Family & Partners, and now one of Europe’s largest multi-family offices. Services span investment management, family governance, tax and trust administration, and philanthropy. Note that Fleming Family & Partners no longer exists as a separate entity — older lists that show both are out of date.

8. Stanhope Capital. An independent investment and wealth management firm serving families, foundations and endowments, with offices in London and internationally. Merged with FWM Holdings in 2021.

9. Schroders Family Office Service. Part of Cazenove Capital, Schroders’ wealth management division. Its family office capability was significantly strengthened by the acquisition of Sandaire, completed in December 2020. Sandaire no longer operates independently, and nor does Lord North Street, which had merged into Sandaire in 2014 — both frequently still appear as separate entries in published lists, which is incorrect.

10. AlTi Tiedemann Global. The successor to LJ Partnership, which became Alvarium in 2019 and merged with Tiedemann Group in 2023 to form AlTi. Provides investment management and family office services internationally, with a large London operation.

11. Quilvest Wealth Management. Originating from the Bemberg family’s interests, Quilvest has operated as a multi-family office and private banking group for several decades, with a presence in London alongside Luxembourg, Switzerland and elsewhere.

12. Rothschild & Co Wealth Management. The wealth and family office arm of Rothschild & Co, serving families, entrepreneurs and foundations with investment management and advisory services.

13. Zedra. A corporate and fiduciary services group with a family office offering covering trust and estate administration, corporate services and fund administration. Structurally different from an investment-led MFO and worth distinguishing on that basis.

Private banks and wealth managers with family office services

These are not family offices, but they provide family-office-style services and compete for the same client relationships. Anyone mapping the sector should understand the distinction, because the businesses, the regulatory position and the career paths are different.

14. C. Hoare & Co. The UK’s oldest privately owned bank, still owned and directed by the Hoare family. Serves families and private clients with banking, lending and wealth services, and is unusual in being a family business serving other families.

15. Kleinwort Hambros. The UK private banking and wealth arm of Société Générale, with a long history of serving UK families and a dedicated family office proposition.

16. Lombard Odier. The Geneva private bank’s London operation, serving international families with investment management and wealth structuring.

17. Pictet Wealth Management. Similarly, the London arm of the Geneva partnership, with a large UK ultra-high-net-worth client base.

18. Rathbones. A major UK discretionary wealth manager serving private clients, charities and families, much enlarged by its 2023 combination with Investec Wealth & Investment UK.

19. Close Brothers Asset Management. Wealth and investment management for private clients and families. Note that the business was agreed for sale to Oaktree in 2025, so its ownership position has changed.

20. Seven Investment Management (7IM). A UK investment manager serving private clients and advisers, acquired by Ontario Teachers’ Pension Plan in 2024.

What is actually changing in the sector

Four developments are visible in how family offices are staffing and structuring themselves, and they show up in hiring long before they show up in commentary.

Direct investment is displacing allocation. A growing proportion of family offices invest directly into operating businesses and property rather than exclusively through external managers. That changes the internal skill requirement fundamentally — from manager selection and portfolio construction toward deal origination, due diligence and post-investment involvement. It is the single biggest driver of demand for investment professionals in the sector.

Governance is being professionalised. As wealth passes to second, third and later generations, informal arrangements stop working. Family constitutions, formal investment committees, independent non-executive input and structured next-generation education are all becoming more common. That creates demand for a genuinely rare profile: someone who combines technical competence with the diplomatic capability to work across a family.

Operational infrastructure is catching up. Consolidated reporting across multiple custodians, asset classes and jurisdictions is a real problem for most family offices, and specialist platforms have emerged to address it. That in turn creates demand for operations and technology people who understand private wealth structures.

And the next generation is changing the mandate. Where responsibility has passed to younger family members, sustainability and impact considerations more frequently form part of the investment policy rather than sitting alongside it in a philanthropic budget. How deep that runs varies enormously by family, and generalisations should be treated carefully.

What this means for hiring

Family office recruitment differs from conventional executive search in three ways that matter, and they explain why it takes longer and why standard approaches frequently fail.

The candidate pool is passive and small. Senior family office professionals rarely apply for anything. Tenures are long, the roles are not advertised, and the strongest candidates are approached rather than sourced. A search that relies on advertising will produce a shortlist of people who are available, which is not the same as a shortlist of people who are right.

Cultural fit is a genuine requirement rather than a phrase. A family office is a small organisation working directly with a principal or a family council. Someone technically excellent who cannot work in that setting — the informality, the absence of institutional process, the personal proximity — will not succeed regardless of their record. This is the most common reason family office appointments fail, and it is testable at interview if you know what to ask.

And confidentiality shapes the whole process. Many families prefer their search not to be visible at all. That constrains how a role can be described, who can be told, and how candidates are approached — and it is why a great deal of family office hiring is conducted on a retained and discreet basis.

The roles most frequently commissioned are Chief Investment Officer, Head of Family Office, CFO and senior investment directors, alongside non-executive appointments where families are formalising governance.