Active09086876Private limited companyShrewsbury

STRONGBOX13 LIMITED

Significant control: Twenty-First Century Media Group Ltd (25–50%)

Companies HouseCompanies House

From public filings as at 31 Aug 2026; may contain errors or be out of date. Verify at Companies House · Terms

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Registered activity: Other publishing activities (SIC 58190). We’re building product and service lists for UK companies. Get this one when it’s ready.

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01

Summary

Generated from filed data · no estimates

STRONGBOX13 LIMITED is an active private limited company (company number 09086876) incorporated on 16 June 2014, registered in Shrewsbury. Its registered activity is other publishing activities (SIC 58190). Latest small accounts cover the period ending 31 December 2024, showing net assets of −£1,827 and cash of £2,124, with 4 employees on average. Net assets fell 45% on the prior period (−£1,261).

Peer position · net assets

By net assets it sits in the bottom quarter of 1,265 comparable companies in Other (median £666, upper quartile £15k).

02

Ownership and control

1 active · 1 other
  • Twenty-First Century Media Group Ltd
    corporate entity, England · since 17 June 2017
    • owns 25–50% of shares
  • Mr Martin Dominic Monahan
    Individual · since 16 June 2017 · ceased 17 June 2017
    • owns 25–50% of shares

Persons with significant control hold 25% or more of shares or voting rights. Smaller shareholdings are only listed in confirmation-statement documents. Directors and secretaries: see the officers list at Companies House.

03

Key dates

Incorporated
16 June 201412 yrs ago
Next accounts due
30 September 202624 days overdue
Confirmation statement due
30 June 2027in 249 days

Due dates are expected from Companies House filing rules; confirm on the official register before relying on them.

04

Activity

SIC 58190
Other publishing activities
Accounts type
Total Exemption Full
Size band
MicroCompanies Act thresholds
05

Financials

2 periods on record · latest ending 31 December 2024
Net assets
−£1,827
vs Dec 2023
Cash at bank
£2,124
−61%vs Dec 2023
Turnover
Not reported
Employees
4
No changevs Dec 2023
Net assets
−£1,827
Cash at bank
£2,124
Average employees
4
Filed accounts by period, newest first
Period endNet assetsCashDebtorsCreditors <1yTurnoverProfitEmployees
31 December 2024−£1,827£2,124—£5,755——4
31 December 2023−£1,261£5,490—£182k——4
Current ratio5.22Current assets ÷ creditors within one year
Cash per employee£531Cash ÷ average employees

Figures as filed in iXBRL accounts at Companies House. "—" means the line was not reported in that filing.

06

Filing and accounts signals

Facts from the register · no rating
  • Net assets below zeroNet assets £-1,827 at 31 December 2024
  • Net assets down 25% or more on the prior period-44.9% vs prior period
  • Current assets at least 1.5× creditors within one yearCurrent ratio 5.22
  • Incorporated five or more years agoIncorporated 16 June 2014
  • Accounts past their due dateDue 30 September 2026

Neutral facts read from the register and filed accounts, each with its evidence. They are not a rating, a prediction or advice, and may be incomplete or out of date. How each signal is derived.

07

Timeline

Newest first
  1. Confirmation statement duein 249 days
  2. Next accounts due24 days overdue
  3. Accounts period endNet liabilities £1,827 · small accounts
  4. Accounts period endNet liabilities £1,261 · small accounts
  5. Incorporated
08

Similar companies in the UK

Same activity (other publishing activities), closest in incorporation date
09

Reminders for STRONGBOX13 LIMITED

Get an email before each filing deadline — accounts and confirmation statement — so nothing is late.

Source: Companies House register, snapshot 2026-08-31; accounts from the Companies House accounts data product. Open Government Licence v3.0. View on Companies House. Methodology · About · Markdown.