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Sia Partners UK PLC
Sia is a new kind of management consulting group. We were born digital, and our work is augmented by data science, enhanced by creativity and driven by responsibility. The company’s own description of itself, taken from its website.
Active 20 years old · 2,301st oldest of 4,506 · incorporated in the 2000s
Registered office
4TH FLOOR, 90 BARTHOLOMEW CLOSE, LONDON, EC1A 7EB
Other PLCs registered in London
Online
Website www.sia-partners.com/en
News and announcements on their own site
Social accounts X, Facebook, Instagram, YouTube
Found by searching for the company name and kept only where the domain matches it. Social accounts are listed only where the company links to them from its own site. Nothing here is supplied by the company to us.
Filing history
This company has 85 documents on its Companies House record. The most recent accounts were filed on 21/12/2025. Its last confirmation statement or annual return was filed on 31/07/2026.
The most recent filings
This is the list of documents filed, not their contents. A line saying accounts were filed records that they were filed and when; it says nothing about turnover, profit or assets, which are inside the documents themselves and are not published here. Read the filings on the Companies House record.
Who runs it
The register lists 4 current officers and 5 who have resigned.
Who controls it
Companies must record the people or entities with significant control. The register shows 1 current entry.
Owns 50% to 75% of the shares; Holds 50% to 75% of the voting rights since 06/04/2016
Charges
No charges are registered against this company.
Officers, controllers and charges are as recorded on the Companies House register on 13/10/2026, and the register changes daily. Appearing here is not an allegation about anyone. Read the current record on the Companies House record.
What it does
This page is compiled from the public register. Companies House does not verify the information filed with it, so treat everything here as what the company reported rather than as established fact. For filings, officers and charges, see the official Companies House record.
Registered office
No other PLC on the register gives this postcode.
On the register
- 2,301st oldest of 4,506 PLCs
- One of the 2000s cohort
- Not in liquidation or facing strike off
There are 4,506 PLCs in Britain, under a tenth of one per cent of the register. The whole count.