Sinclair Gibson

What Sinclair Gibson does

Sinclair Gibson is a London-based boutique private client law firm (Sinclair Gibson LLP, SRA registration 658891) operating from 3 Lincoln's Inn Fields. It advises high-net-worth individuals, families, trustees, executors, beneficiaries, and family offices on wealth and succession planning, trust establishment and restructuring, estate administration, landed estates, family law, and contentious trust and probate disputes. The firm also acts as Privy Council agent for offshore Commonwealth jurisdictions including Guernsey, Jersey, the British Virgin Islands, the Bahamas, and Trinidad and Tobago, giving it a specialised cross-border litigation channel.

The firm delivers services through four integrated practice areas — Private Client, Family, Litigation, and Family Office Services — supported by approximately 10 partners and 30 additional staff including senior associates, associates, consultants, trainee solicitors, and administrative personnel. There is no proprietary technology platform; the practice runs on standard CMS (ExpressionEngine), Legl for secure client payments, Google Analytics for web traffic, and conventional legal practice/document management systems. The team combines tax, trust, landed estates, family law, and litigation expertise under one roof, allowing contentious matters to draw directly on private client and family colleagues for integrated advice.

The business model is a referral- and reputation-driven professional services practice. Revenue is generated through billable legal services to HNW private clients, trustees, families, family offices, and offshore law firms; fees are bespoke and not publicly disclosed. Go-to-market relies on legal directory rankings (Chambers HNW, Legal 500, Spears, Citywealth), thought leadership via published articles, hosting/speaking at industry events such as ConTrA seminars, and word-of-mouth referrals through professional intermediaries. The firm is entirely partner-owned with no external investors or parent company.

Name

Sinclair Gibson

Legal name

Sinclair Gibson LLP

Website

https://sinclairgibson.com

Company type

Private

Founded year

2019

Operating status

Operating

Headcount range

11–50 employees

Short description

Sinclair Gibson is a London boutique private client law firm advising high-net-worth individuals, families, trustees, family offices, and offshore Commonwealth law firms on wealth and succession planning, family law, trust litigation, and Privy Council agency work.

Ownership category

akta.pro rank

Product category

Private Client Legal Services

NAICS

Offices of Lawyers (541110)

SIC

Services-Legal Services (8111)

akta.pro primary industry

Family & Private Client (Trusts & Estates) Law (BPAHAAAK)

akta.pro secondary industry

Family Office Services (Single & Multi-Family Office) (FSABADAF)

Keywords

• Private client law
• Trust and estate planning
• Wealth management advisory
• Contentious trusts litigation
• Family law services

Headquarters

HQ city

London

HQ country

United Kingdom

HQ region

Europe

Offices1 record

Markets served

GTM type

B2C

Offering type

Services

Cost components

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

Revenue model

1. Legal Services Fees: Sinclair Gibson generates revenue through billable legal services provided to high-net-worth private clients, trustees, families, and offshore law firms. Fees are charged for advice and representation across private client, family, and litigation practice areas. The firm also offers a Front of House Assistant role indicating some administrative service provision.

Pricing tiers

Go-to-market motion1 record

Distribution channels2 records

Marketing channels4 records

Core offering

Sinclair Gibson is a boutique London law firm providing private client legal services across four integrated practice areas: Private Client (wealth and succession planning, trust establishment, tax planning), Family (divorce, financial remedies, nuptial agreements), Litigation (contentious trust and probate disputes, Privy Council agency work), and Family Office Services (wills, probate, trust administration, accounting, and investment liaison). The firm advises high-net-worth individuals, families, trustees, and offshore Commonwealth law firms on complex UK and international private wealth matters.

Product overview

Sinclair Gibson is a boutique law firm operating as a single unified practice rather than a platform-plus-modules architecture. The firm offers four core practice areas: Private Client (wealth and succession planning), Family (family law matters), Litigation (contentious trust and probate matters), and Family Office Services (support services including wills, trust administration, probate, accounting, and investment liaison). Each practice area contains specific sub-services and specializations, with close collaboration between departments to provide integrated advice on complex private wealth matters.

Differentiator

Problem solved

Functional benefit

Products and services

• Private Client Wealth and succession planning services for domestic and international private clients, including trust establishment and restructuring, tax planning, and estate management for high-net-worth individuals and families.
• Family Family law services including divorce and separation, complex financial remedies, pre/post-nuptial agreements, and private children matters for high-net-worth individuals, often involving trusts, landed estates, and international assets.
• Litigation Contentious trust and probate litigation, succession disputes, Inheritance Act claims, commercial litigation in the High Court, and offshore matters including Privy Council agency work.
• Family Office Services Comprehensive ongoing support services including wills and lasting powers of attorney, trust administration and governance, probate and estate administration, accounting services, and investment management liaison for wealthy families and trustees.
• Privy Council Agency Acting as Privy Council agent for offshore Commonwealth jurisdictions including Guernsey, Jersey, British Virgin Islands, Bahamas, and Trinidad and Tobago in civil and criminal appeals.
• Mediation Resolution-trained mediation services for family disputes, providing a constructive forum for resolving contentious family matters, offered by a Family Mediation Council registered mediator.

Named customers4 records

Segments5 records

Ideal customer profiles5 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration1 record

Scale indicators3 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• Maurice Turnor Gardner LLP: Maurice Turnor Gardner is a London boutique private client law firm of similar size and focus, specialising in trusts, tax, estates, and family work for HNW clients. It is the closest direct comparator to Sinclair Gibson in terms of scale, structure, and practice mix.
• Boodle Hatfield LLP: Boodle Hatfield is a London private client and family law firm of comparable boutique scale with a strong focus on landed estates, trusts, and HNW family matters. Directly competes with Sinclair Gibson in the same Chambers HNW and Legal 500 categories.
• Payne Hicks Beach LLP: Payne Hicks Beach is a long-established London private client and family law boutique known for HNW divorce, nuptial agreements, and private client work. It directly competes for the same HNW family and private client matters as Sinclair Gibson.
• Forsters LLP: Forsters is a London-based private client and family law firm with comparable focus on landed estates, trusts, family, and residential property work for HNW clients. Slightly larger than Sinclair Gibson but operates in the same specialist boutique segment.
• Hunters Law LLP: Hunters Law is a Mayfair-based boutique firm offering private client, family, and residential property services to HNW clients. Similar size and client profile to Sinclair Gibson, competing for the same professional-referred HNW work.
• Wedlake Bell LLP: Wedlake Bell is a mid-sized London firm with a dedicated private client and family practice covering trusts, tax, and family law for HNW clients. It overlaps directly with Sinclair Gibson's core service offering at a slightly larger scale.
• Cripps Pemberton Greenish: Cripps Pemberton Greenish is a UK firm with a focused private client and family practice serving HNW individuals, trustees, and family offices. It is a comparable specialist in the same referral-driven niche as Sinclair Gibson.

Broad incumbents

• Farrer & Co LLP: Farrer & Co is a larger and longer-established London private client firm with royal warrants and a much broader portfolio across private client, family, property, and commercial work. It is a prestigious incumbent that Sinclair Gibson competes with on complex HNW matters.
• Withers LLP: Withers is a much larger international private client and family law firm and is notably where Sinclair Gibson partner Angela White previously worked for 14 years. It competes for the same high-end trust, family, and succession matters at greater scale.
• Charles Russell Speechlys LLP: Charles Russell Speechlys is a larger London-based firm with a significant private client and family practice, including the former Speechly Bircham practice where Sinclair Gibson consultant Hannah Southon previously worked. It is a broader incumbent in the same HNW niche.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat6 records

Key risks4 records

Key highlights6 records

Customer concentration

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles18 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 Sinclair Gibson