Firmoscan
Active17028112Private limited companyLondon

20THIRTYONE LTD

Significant control: Antonio John Castiglia (75–100%)

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From public filings as at 31 Aug 2026; may contain errors or be out of date.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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What does 20thirtyone Ltd sell?

Registered activity: Advertising agencies (SIC 73110). 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

20THIRTYONE LTD is an active private limited company (company number 17028112) incorporated on 11 February 2026, registered in London. Its registered activity is advertising agencies (SIC 73110). No accounts have been filed yet; the first accounts are due by 11 November 2027.

There are 5,115 companies in advertising agencies in London with filed accounts; the median reports net assets of £1,963 and is 6 years old.

02

Ownership and control

1 active
  • Antonio John Castiglia
    Individual · since 11 February 2026
    • owns 75–100% of shares
    • holds 75–100% of voting rights
    • can appoint or remove directors

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
11 February 2026under 1 yr ago
First accounts due
11 November 2027in 384 days
Confirmation statement due
25 February 2027in 125 days

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

04

Activity

SIC 73110
Advertising agencies
Accounts type
No Accounts Filed
05

Financials

No accounts on record

No accounts filed yet. The first accounts are due by 11 November 2027; this page updates when they are filed.

06

Timeline

Newest first
  1. First accounts duein 384 days
  2. Confirmation statement duein 125 days
  3. Incorporated
07

Similar companies in London

Same activity (advertising agencies), closest in incorporation date

All companies incorporated on 11 February 2026 · in Feb 2026.

08

Reminders for 20THIRTYONE LTD

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

Source: Companies House register, snapshot 2026-08-31. Open Government Licence v3.0. View on Companies House. Methodology · About · Markdown.

This information comes from public filings and our automated processing of them. It may contain errors, be incomplete or be out of date, and is not advice or a credit reference. Check the official record before relying on it. Terms · Privacy · Report an error (corrected within one working day).