AD01 is the filing code usually seen when a company changes its registered office address at Companies House. In practical terms, it is a company-level record change rather than a director or PSC event.
That does not make it low-signal. A registered office change can matter for notices, service-provider context, internal records, and the wider story around a company's governance or operating setup.
What does AD01 mean?
AD01 means a filing was made to change the company's registered office address at Companies House. In plain language, the public registered office has been updated.
That makes AD01 one of the clearest company-level operational filings in the record, even though it is not directly about directors or PSCs.
What AD01 does not tell you from the code alone
AD01 tells you the registered office changed, but not why. The code itself does not explain whether the company moved providers, changed administrative setup, or made some other operational adjustment.
That is why AD01 is best treated as a review prompt. The filing is clear, but the business meaning still comes from the wider company context.
Why AD01 matters for operational monitoring
A registered office change can matter because it affects the public address the company is now using for formal record purposes. For advisers and monitoring teams, that can intersect with provider relationships, service coverage, and the broader story around how the company is being administered.
It is also worth reading next to nearby filings, because address changes can appear around confirmation statements, officer updates, or other operational changes in the same period.
What to check after you see AD01
The practical move after AD01 is to review the current company record and decide whether the address change matters to your workflow or reporting.
Check the current registered office Confirm the new public address now shown on the live company record.
Compare it with the previous operating view If your team stores company-reference details elsewhere, make sure those records are not now stale.
Read nearby filings Look for confirmation-statement, officer, or PSC filings around the same time that may help explain the wider update.
Decide whether it changes operational follow-up If the address shift matters to service-provider context or internal reporting, someone should actively review and record the change.
Recent real-company examples where AD01 shows up on the public record
These are drawn from the current seeded public-company slice. They turn the filing code into something more useful than a glossary term by showing the code on a real company page alongside the current verification read and company status.
Sampled from 90 public company pages and looking back up to 240 days for recent AD01 filings.
JELD-WEN UK LIMITED Registered office address changed from Retford Road Woodhouse Mill Sheffield South Yorkshire S13 9WH to Bessemer Park, Unit 3a Shepcote Lane Sheffield S9 1DZ on 2026-04-03
Form AD01. Filed on 2026-04-03.
OASTDREN SECURITIES LIMITED Registered office address changed from Suit 15, 113 Liverpool Road Studios Liverpool Road Crosby Liverpool L23 5TD England to 63 Coronation Road Crosby Liverpool L23 5RE on 2026-02-03
Form AD01. Filed on 2026-02-03.
VALEBRET LIMITED Registered office address changed from Fifth Floor Watson House 54-60 Baker Street London W1U 7BU United Kingdom to 83-85 Baker Street London W1U 6AG on 2026-03-19
Form AD01. Filed on 2026-03-19.
Check the current company record instead of stopping at the filing code.
Entity Watch helps teams review the live company position around filings, deadlines, officers, PSCs, and the next operational follow-up without rebuilding the same manual review every time a new code lands.
Common questions
Does AD01 mean the registered office address changed?
Yes. AD01 is the filing code used when a company changes its registered office address at Companies House.
Is AD01 a director filing?
No. AD01 is a company address filing rather than a director appointment, termination, or details-change filing.
Does AD01 automatically mean a problem?
No. It is often a routine company-record change, but it is still worth reviewing because the public registered office position has moved.
Can Entity Watch file AD01 for me?
No. Entity Watch is not a filing agent and does not submit Companies House forms for you. It is a monitoring and workflow layer that helps teams understand what changed, what deadline is next, and where to follow up.