Company lists · Data refreshed September 2026
Top 23 Family offices based in Guernsey
RevenueBase identified 39 family offices headquartered in Guernsey as of September 2026 and tracks 1,247 professional contacts across them, including 489 with verified work emails. St Peter Port is the largest hub.
This list covers family offices headquartered in Guernsey, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 19, 2026.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.
The 23 largest family offices based in Guernsey
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 91 contacts → | ||||
Indirect evidence “Belasko are redefining what exceptional looks like in fund and fiduciary services.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 2 | 39 contacts → | ||||
Indirect evidence “Stenham has a long and established track record in providing discretionary investment management services to a sophisticated and varied client base.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 3 | 31 contacts → | ||||
Partial evidence “Bellerive Trust Company is an independent Channel Islands fiduciary focused on providing premium service to ultra-high net worth individuals, families, institutions and family…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 4 | 28 contacts → | ||||
Indirect evidence “Invicta is an independent trust and company administration services company in Guernsey, specialising in Private Client and Wealth Administration.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 5 | 28 contacts → | ||||
Strong evidence “We offer an efficient and innovative service for Fiduciary, Corporate and Family Office arrangements which includes Trusts, Foundations, Partnerships and Companies.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 6 | 25 contacts → | ||||
Indirect evidence “Artemis offers fiduciary services such as trust and corporate administration which are underpinned by a philosophy of service and agility.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 7 | 25 contacts → | ||||
Partial evidence “Polygon Group Limited, known as the Polygon Collective is an independent family-owned investment company which manages a diverse portfolio that provides support and unique…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 8 | 20 contacts → | ||||
Indirect evidence “Expert wealth management advice We provide global solutions.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 9 | 17 contacts → | ||||
Indirect evidence “Hansard Limited is a licensed Guernsey fiduciary services company providing professional trust and corporate services to clients all over the world.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 10 | 14 contacts → | ||||
Indirect evidence “Lancaster is an independent, privately owned fiduciary and investment management company based in the white-listed international finance centre of Guernsey.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 11 | 12 contacts → | ||||
Indirect evidence “Welcome to Orbitus a truly independent, owner-managed firm based in Guernsey.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 12 | 12 contacts → | ||||
Partial evidence “A leading fiduciary business, headquartered in Guernsey, but with offices around the world, Nerine’s success is built on the relationships it has forged over many years with our…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 13 | 11 contacts → | ||||
Indirect evidence “At Avenue Trust Company, we’re passionate about building modern, flexible structures for clients navigating a world where people, businesses, and capital are increasingly mobile.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 14 | 10 contacts → | ||||
Partial evidence “Operating from its offices in the heart of St.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 15 | 10 contacts → | ||||
Strong evidence “Established in Guernsey in 1998, Beauvoir Limited is an independent, owner-managed, leading provider of Trust, Corporate, Fund and Family Office services to corporate clients…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 16 | 9 contacts → | ||||
Indirect evidence “An independent, owner-directed trust company operating from Guernsey in the Channel Islands, Albecq prides itself on being approachable and knowledgeable in the establishment and…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 17 | 6 contacts → | ||||
Indirect evidence “Established in 2010 and based in the Bailiwick of Guernsey, Parish Group delivers bespoke corporate, trust and private client services to individuals and businesses worldwide.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 18 | 6 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 19 | 6 contacts → | ||||
Strong evidence “3C Capital is an integrated family office with both public and private investments primarily focused on early-to-mid stage growth investments.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 20 | 5 contacts → | ||||
Indirect evidence “Aquitaine stands as a trusted name in fiduciary services, offering a personalised and professional approach combining institutional expertise with a commitment to exceptional…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 21 | 3 contacts → | ||||
Partial evidence “Aurum Private – Discretion, Structuring and Long-Term Stewardship Aurum Private provides bespoke wealth and fiduciary solutions to ultra-high-net-worth individuals, families, and…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 22 | 3 contacts → | ||||
Strong evidence “We work with family offices and closely-held private businesses to protect their assets and the health of their business.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 23 | 1 contacts → | ||||
Strong evidence “Private Office Professionals provides personalised services to businesses, family offices and private clients.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
RevenueBase Smart Search
RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: family offices. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.
- Strong evidence
- The company's own public description of its business names family offices.
- Partial evidence
- Its own public description names part of family offices, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name family offices. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.
RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.
Showing 23 of 39 family offices based in Guernsey
See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 489 reachable decision-makers.
Free signup · no credit card
Family offices based in Guernsey at a glance
As of Sep 19, 2026Companies by employee count
Email recency for this list is measured worldwide rather than for Guernsey, so it is reported there. Company counts and contact totals on this page are exact for Guernsey, over 39 companies.
How this list was built
Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among family offices, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
- What qualifies
- Companies headquartered in Guernsey whose own description of what they do matches “family offices”. Matching reads each company's description, not its industry code or its name.
- RevenueBase Smart Search
- RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names family offices), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
- What we exclude
- Companies whose own description does not clearly place them among family offices, and records with no verified work email. Companies headquartered outside Guernsey are excluded even when they keep an office there.
- Match quality
- In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
- Ranking
- Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
- Verification
- Every listed company carries at least one verified work email, 489 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
- Refresh
- This page's figures were pulled from the company graph on September 19, 2026. Lists refresh periodically as the graph is re-checked.
- Corrections
- Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.
Frequently asked
What is RevenueBase Smart Search?
RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names family offices, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.
How many family offices are there based in Guernsey?
RevenueBase identified 39 family offices headquartered in Guernsey as of September 2026, matched on each company's own description of what it does rather than its industry code.
What is the largest company on this list?
Belasko, headquartered in St Peter Port, tops this list with the largest team on record.
Which city has the most family offices?
St Peter Port leads with 23 headquartered companies, followed by St. Peter Port (4) and St Sampson (2).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 489 verified decision-maker contacts tracked across these 39 companies.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 19, 2026.
Ready to reach these companies? Verified emails and direct dials for all 39 family offices based in Guernsey. Start with a free account, no credit card.
Download this list →Related lists
Family offices by geography
- Family offices based in Brisbane, Australia
- Family offices based in Melbourne, Australia
- Family offices based in Perth, Australia
- Family offices based in Sydney, Australia
- Family offices based in Belo Horizonte, Brazil
- Family offices based in Curitiba, Brazil
- Family offices based in Porto Alegre, Brazil
- Family offices based in Rio De Janeiro, Brazil
- Family offices based in Sao Paulo, Brazil
- Family offices based in Calgary, Canada
- Family offices based in Edmonton, Canada
- Family offices based in Mississauga, Canada
Browse the directory
About this data
RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Family offices based in Brisbane, Australia
- Family offices based in Melbourne, Australia
- Family offices based in Perth, Australia
- Family offices based in Sydney, Australia
- Family offices based in Belo Horizonte, Brazil
- Family offices based in Curitiba, Brazil