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Companies House/London/Company profile

A3 CYBER ADVISORY LTD

Active
16435629·incorporated 2025-05-07

A3 CYBER ADVISORY LTD is an active UK private limited company, incorporated on 7 May 2025 at Companies House (number 16435629; OpenRegistry canonical ID GB-16435629-a3-cyber-advisory-ltd). Sophymarine's OpenRegistry classifies it under SIC 62012 (Business and domestic software development), one of 87,841 active UK entities in that code and one of 1,093,852 active companies registered in London (postcode WC2H). Programmatic access via MCP at https://openregistry.sophymarine.com/mcp.

Status
Active
Type
Private Limited Company
Incorporated
2025-05-07
Registered Address
71-75 SHELTON STREET, COVENT GARDEN, LONDON, WC2H 9JQ, UNITED KINGDOM
SIC
62012 — Business and domestic software development
Country of origin
United Kingdom

Directors

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Shareholders

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Financials

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Filings

Check filing history of A3 CYBER ADVISORY LTD

Accounts

Next accounts due 2026-09-30. Financial year-end: 31/12. Filing class: NO ACCOUNTS FILED.

Confirmation statement

Next confirmation statement due 2026-05-20.

Persons with significant control

A3 CYBER ADVISORY LTD has 1 person with significant control on file:

  • Mr Serhii Sysoiev born 1983 resident in Canada, Ukrainian national. Notified 2025-05-07.
    • Owns 50–75% of shares
    • Holds 50–75% of voting rights

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Need real-time profile, officers, shareholders, financials or filing? Open the live profile at /company/gb/16435629.

Source: Companies House Free Company Data, refreshed 2026-05-01. Official record: find-and-update.company-information.service.gov.uk.