opendata.bot
Company number
04521272

GARTHPOOL UNDERWRITING LIMITED

Active
✓ Active company on the official register. Next accounts due 30 September 2026.

Company details

East Midlands, England Contains OS data © Crown copyright and database right. Contains Royal Mail data © Royal Mail copyright and database right. Source: Office for National Statistics licensed under the Open Government Licence v.3.0.
Registered name
GARTHPOOL UNDERWRITING LIMITED
Company number
04521272
Registered office
3 CASTLEGATE, GRANTHAM, LINCOLNSHIRE, NG31 6SF · 566 other companies at this postcode
Company type
Private Limited Company
Incorporated on
29 August 2002
Status
Active
Age
24 years
Nature of business (SIC)
65120 — Non-life insurance
Accounts — next due
30 Sept 2026
Accounts — last made up to
31 Dec 2024
Confirmation statement — next due
03 Mar 2027
Confirmation statement — last
17 Feb 2026

What the register says

Facts from the register, with the dates they are filed under. Not a score: what they mean is for you to judge, and every line can be checked against Companies House itself.

Companies House register snapshot, read 02/09/2026.

People with significant control

Beneficial owners holding over 25% of shares, voting rights or the right to appoint directors

Miss Jemima Victoria Garthwaite
owns 25–50% of shares · holds 25–50% of voting rights
Notified 27/03/2026
Miss Rosie Francesca Garthwaite
owns 25–50% of shares · holds 25–50% of voting rights
Notified 27/03/2026
Mr William Tuzo Garthwaite
owns 25–50% of shares · holds 25–50% of voting rights
Notified 27/03/2026
Sir William Mark Charles Garthwaite (Deceased)
owns 75–100% of shares · holds 75–100% of voting rights · can appoint and remove directors
Notified 06/04/2016

Corporate structure

Who controls this company, and who they control in turn

4 controllers Drag to move · scroll to zoom · double-click to expand
Company Person Current control Ended

Connections

Miss Jemima Victoria Garthwaite
born 01/1984 · England owns 25–50% of shares · holds 25–50% of votes Notified 27/03/2026 Controls 2 companies
Miss Rosie Francesca Garthwaite
born 10/1980 · England owns 25–50% of shares · holds 25–50% of votes Notified 27/03/2026 Controls 4 companies
Mr William Tuzo Garthwaite
born 05/1982 · England owns 25–50% of shares · holds 25–50% of votes Notified 27/03/2026
Sir William Mark Charles Garthwaite (Deceased)
born 11/1946 · England owns 75–100% of shares · holds 75–100% of votes · can appoint and remove directors Control ended 27/03/2026

Change history

Reconstructed from the dated records Companies House publishes

DateChangeWasNow
27/03/2026 Person with significant control ceased Sir William Mark Charles Garthwaite (Deceased)
27/03/2026 Person with significant control added Mr William Tuzo Garthwaite
27/03/2026 Person with significant control added Miss Rosie Francesca Garthwaite
27/03/2026 Person with significant control added Miss Jemima Victoria Garthwaite
06/04/2016 Person with significant control added Sir William Mark Charles Garthwaite (Deceased)

Documents for GARTHPOOL UNDERWRITING LIMITED

Need this one company on file? Buy the document on its own — no plan required.

Company extract£1.99

The full registration record as held today — name, number, status, registered office, company type, previous names, officers, PSC and SIC codes, timestamped for your file.

PDF Order
Financial statements£3.99

Every figure the company’s own accounts state, across each filed period, with year-on-year movement. Most UK companies file small or micro-entity accounts — a balance sheet and a headcount, no turnover or profit.

PDF + CSV Order
Ownership report£3.99

Who controls the company: persons with significant control, the nature of that control, the ownership graph and every other company those controllers hold.

PDF Order

Data protection register

No entry found on the ICO register of fee payers under this name.

Not every organisation has to register — some are exempt. An absent entry is a question to ask, not a finding.

Get this company via API

Every field on this page is available as structured JSON behind one endpoint and one API key.

GET /v1/company/gb/04521272
X-Api-Key: $OPENDATA_KEY
Read the API docs

Frequently asked questions

What is the company number of GARTHPOOL UNDERWRITING LIMITED?
According to the official registry, the company number of GARTHPOOL UNDERWRITING LIMITED is 04521272.
Where is GARTHPOOL UNDERWRITING LIMITED registered?
The registered office is 3 CASTLEGATE, GRANTHAM, LINCOLNSHIRE, NG31 6SF.
What is the SIC code of GARTHPOOL UNDERWRITING LIMITED?
The nature of business is recorded under SIC code 65120 — Non-life insurance.
Who controls GARTHPOOL UNDERWRITING LIMITED?
Miss Jemima Victoria Garthwaite is recorded as a person with significant control, and owns 25–50% of shares, holds 25–50% of voting rights.
When are the next accounts of GARTHPOOL UNDERWRITING LIMITED due?
The next annual accounts are due by 30 September 2026, and the last accounts were made up to 31 December 2024.

About GARTHPOOL UNDERWRITING LIMITED (04521272)

GARTHPOOL UNDERWRITING LIMITED is a private limited company incorporated on 29 August 2002 and registered in the United Kingdom under company number 04521272. Its registered office is at 3 CASTLEGATE, GRANTHAM, LINCOLNSHIRE, NG31 6SF. The recorded nature of business is non-life insurance (SIC 65120). The company is currently active , with statutory accounts last made up to 31 December 2024. , and the person with significant control is Miss Jemima Victoria Garthwaite. This profile is provided by opendata.bot by Noetikos, aggregating official data from Companies House bulk data , last refreshed 2 September 2026.

Companies at the same registered office

Non-life insurance across UK registers

The same sector and the same company, seen through every register we hold

Explore by sector

Every UK company records what it does as a SIC code — browse the sectors around this one.