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Other software publishing · Edinburgh, Scotland

Sumdog

Sumdog Ltd

Staff down 17%ActiveLatest figures: 2025Filed as a small companyAbridged accountsCompany only30 years on the register

Private limited company registered in Edinburgh, classed under “Other software publishing”.

Headline figures

FY to Dec 2025 · Company only

Turnover

For subscribers

Profit after tax

—

Not filed: small-company exemption

Net assets

For subscribers

Cash

For subscribers

Employees

For subscribers

What the numbers say

2 findings from the figures, in plain English

Written by rules from the figures on this page. Not a forecast or a credit opinion.

History

Pro
£202320242025
Profit after tax—
Turnover
Net assets
Cash
Employees

Every figure for all 3 years

“—” means we did not find the figure in a source; it is never filled with an estimate.

Balance sheet and ratios

From the filed balance sheets · £

Balance sheet202320242025
Fixed assets
Current assets
of which debtors
of which cash
Creditors due within a year
Net current assets
Net assets
Ratios
Current ratioCurrent assets for every £1 owed within a year
Cash ratioCash for every £1 owed within a year
Creditors to assetsEverything owed to creditors as a share of fixed plus current assets

7 balance-sheet lines and 3 ratios, every year

A ratio appears only for years where every line it needs was filed. Lines are as tagged in the accounts; nothing is added up or estimated.

Timeline

Checked 2026-10-12

  1. Accounts
    Accounts for a small company made up to 31 December 2025
  2. Directors
    Termination of appointment of Jonas Magnus Martensson as a director on 22 April 2025
  3. Directors
    Appointment of Mr Karl Fredrik Bengtsson as a director on 22 April 2025
  4. Accounts
    Accounts for a small company made up to 31 December 2024
  5. Address
    Registered office address changed from 43 Queensferry Street Lane Edinburgh EH2 4PF to Codebase Argyle House 3 Lady Lawson Street Edinburgh EH3 9DR on 3 December 2024
  6. Directors
    Termination of appointment of Anne-Louise Wirén as a director on 31 May 2024
  7. Accounts
    Accounts for a small company made up to 31 December 2023
  8. Directors
    Appointment of Mr Jonas Magnus Martensson as a director on 15 May 2024
  9. Directors
    Termination of appointment of Martin Anders Dahlgren as a director on 28 June 2023
  10. Directors
    Termination of appointment of Salman Eskandari as a director on 28 June 2023
  11. Directors
    Termination of appointment of Andrew Medlicott Hall as a director on 28 June 2023
  12. Directors
    Appointment of Mrs Anne-Louise Wirén as a director on 18 April 2023
  13. 3 earlier
    1. Accounts
      Accounts for a small company made up to 31 December 2022
    2. Accounts
      Accounts for a small company made up to 31 December 2021
    3. Directors
      Termination of appointment of Martin Anders Dahlgren as a director on 23 February 2022

From the Companies House filing history. Routine confirmation statements are left out, and a run of the same filing is shown once.

Questions people ask

›What does Sumdog do?

Private limited company registered in Edinburgh, classed under “Other software publishing”. In its own words: “Helping children aged 5-14 enjoy learning, build confidence and make progress in maths and spelling. Discover Sumdog.”

›How much turnover does Sumdog make?

Answered in the full report

›Is Sumdog profitable?

Sumdog's profit isn't public: small companies may file without a profit and loss account.

›How many people work at Sumdog?

Answered in the full report

›Who runs and owns Sumdog?

Answered in the full report

›Where is Sumdog based?

Its registered office is Codebase Argyle House, 3 Lady Lawson Street, Edinburgh, EH3 9DR, in Edinburgh, Scotland.

›When was Sumdog founded?

Sumdog Ltd was incorporated on 29 July 1996.

›Is Sumdog still trading?

The register lists Sumdog Ltd as active.