Company · London
Thalassa Holdco Limited
Activities of other holding companies n.e.c.
Official record Companies House · updated 27th September 2026 · Sources
Network
The large node is Thalassa Holdco Limited. Red nodes are organisations, white nodes are people. Sign in free to explore further.
Who leads it
Directors and secretaries as filed at Companies House.
Do you help lead this organisation? Set up its network · How it works
About
- What it does
- Activities of other holding companies n.e.c.
- Incorporated
- 28/01/2022
- Registered office
- London
- Previous names
- Crest Holdco Limited (until 09/03/2026)
Ownership
Owned by (1) iOwned byIndividuals and companies registered as having significant control over this company, from the Companies House PSC (persons with significant control) register. People whose ownership could not be confirmed to one individual are not listed as confirmed owners.
- Richard Barry Sanders
25-50% shares · notified 2022-01-28 - Possible match - name could not be confirmed to one individualiPossible matchThis PSC filing could not be confirmed to one individual. Not shown as confirmed ownership.
Group
- Thalassa Holdco Limited
is controlled by Richard Barry Sanders
Evidence
active 25-50% shares · notified 2022-01-28 · source: Companies House PSC register
Ultimately controlled by Richard Barry Sanders.
33 other companies in this group
- Amistha Holdings Limited
- Secure Site Civil Enforcement Limited
- Sullivan Street Partnership LLP
- Amistha Midco Limited
- Loop Sustainable Visuals Limited
- Clip Bidco Limited
- Clip Topco Limited
- Lucess Topco Limited
- Aligned Empowered Limited
- 06971739
- Guardian Secure Site Limited
- Ancora Investco Limited
- Portcullis Site Security Limited
- Orbis Protect Limited
- Lucess Investco Limited
- Ancora Midco Limited
- Amistha Bidco Limited
- Safesite (UK) Limited
- Amistha Holdings 2 Limited
- Clip Midco Limited
- Vigilance Properties LTD
- Ancora Holdco Limited
- Medica SS Nominees Limited
- Lucess Bidco Limited
- Secure Site Fire & Security LTD
- Panthera Temporary Site Services Limited
- Secure Site (UK) LTD
- Concrete Barrier Hire LTD
- Tivoli Group Limited
- OC357385
- Lucess Midco Limited
- Ancora Buyer Limited
- Vigilance Security Limited
Ownership paths are calculated from Companies House persons-with-significant-control filings. Each step shows the filed nature of control and dates; a step marked "ceased" is historical, not current.
Financials
- Net assets
- £15,500,104
- Total assets
- £15,500,104
- Employees
- 2
- Turnover
- Not reported (small or micro-entity accounts)
Figures from accounts filed at Companies House (iXBRL), period ending 2025-03-31. Where turnover is absent, small and micro-entity accounts are not required to report it, so it is not shown as zero.
Board analysis
Board DNA
How this board is put together, from the Companies House officer record and Charity Commission trustee records - deterministic, no AI.iBoard compositionCounted from the dated Companies House officer record: the current directors only, past directors excluded.
2 directors on the board
- Layton Gwyn Tamberlin Director · appointed 2022
- Richard Barry Sanders Director · appointed 2022
First-time vs portfolio directors
Portfolio (2)
- Layton Gwyn Tamberlin Director · appointed 2022
- Richard Barry Sanders Director · appointed 2022
Where else this board sits iWhere else this board sitsThe charitable fields these directors govern in elsewhere, by Charity Commission classification. Excludes this company and any charity it is the legal face of.
The sectors these directors govern in elsewhere. This company, and any charity it is the legal face of, are excluded - counting them would just tell you what you are already looking at.
Sources
Official record from Companies House. Governance Register calculates the connections.
Record details
- Company number
- 13878585
- Status
- Active
- Type
- Private Limited Company
- Accounts next due
- 31/12/2026
- Edition
- Register edition compiled 27th September 2026
- Labels
- Official record from Companies House · Calculated derived by Governance Register.
Contains public sector information licensed under the Open Government Licence v3.0. Report an issue · How we handle data