ONETAG LIMITED
Company number 09905190 · Monitor this company
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Shareholders' funds
£17,819,741
Balance sheet as at 2025-12-31
What it does
The principal activity of the company is the provision of a trading platform for digital advertising.
The company's own description, from its latest filed accounts.
Overview
- Company type
- Private Limited Company
- Incorporated
- 2015-12-07
- Employees
- 14 (2025 accounts · was 11 in 2024)
- Registered office
- 5th Floor North Side 7/10 Chandos Street, Cavendish Square, London, United Kingdom, W1G 9DQ
- Postcode
- W1G 9DQ
- Capital
- 1,000 GBP
- Accounts category
- Full
Accounts
- Last made up to
- 2025-12-31
- Next due by
- 2027-09-30
- Financial year end
- 31 December
Confirmation statement
- Last statement dated
- 2026-01-12
- Next due by
- 2027-01-26
Nature of business (SIC)
- 73110 Advertising agencies
Officers 6 current · 7 resigned
Group structure
Controlled by CROSSREACTIVE LIMITED — since 2016-09-10
From persons-with-significant-control filings on the public register.
Licensed visa sponsor
Licensed by the Home Office to sponsor worker visas: Skilled Worker (Worker (A rating)).
Matched by registered name to the register of licensed sponsors (Home Office, updated daily) — check the register itself before relying on it. Contains public sector information licensed under the Open Government Licence v3.0.
Data protection registration
Registered with the ICO as a data protection fee payer — ZB117802 (Tier 2), registered since 2021.
Information Commissioner's Office register of fee payers, licensed under the Open Government Licence.
Contact details
- Website
- onetag.com
- Phone
- 004585 100, 061525 100, 085664710
Powering the future of programmatic advertising—real-time AI that optimizes programmatic inventory to deliver measurable business growth at scale.
Previous registered addresses 6
| Address | Changed on |
|---|---|
| 1-4 PALLADIUM HOUSE, ARGYLL STREET, LONDON, W1F 7LD, ENGLAND | 2019-10-04 |
| C/O STREETS CHARTERED ACCOUNTANTS 48, DOVER STREET, LONDON, W1S 4FF, ENGLAND | 2018-06-12 |
| C/O STREETS CHARTERED ACCOUNTANTS 30 GREAT PORTLAND STREET, LONDON, W1W 8QU, ENGLAND | 2017-05-25 |
| 30 GREAT C/O STREETS CHARTERED ACCOUNTANTS, GREAT PORTLAND STREET, LONDON, W1W 8QU, ENGLAND | 2017-01-18 |
| 9 SEAGRAVE ROAD, LONDON, SW6 1RP, ENGLAND | 2017-01-13 |
| C/O TAXMEN, 9 SEAGRAVE ROAD 9 SEAGRAVE ROAD, LONDON, LONDON, SW6 1RP, UNITED KINGDOM | 2016-01-22 |
Among its peers
Top 1%
by shareholders' funds, of 993 similar companies in W
Among the biggest employers among its local peers (14 staff).
Among the oldest 25% of its local peers, trading since 2015.
No.2 of the largest advertising agencies companies in London →
Competitors London
This company ranks 2 among advertising agencies in London.
The class of 2015
29%
of the 2,169 companies in this sector incorporated in 2015 are still active today; 67% have since been dissolved.
A fact about the year, not a forecast for this company.