The assets you own through a company
Register a company you hold shares in, put its assets inside it, and Vault counts your share of each one in your net worth. A company can own another company. The ladder resolves down to your actual economic share, which is the figure a spreadsheet gets wrong first.
Your share, not the whole balance sheet
Hold 40% of a company that owns a building and 200,000 in cash, and Vault adds 40% of both to your net worth — not the building, and not nothing. Ownership is recorded as capital entries with dates, so a raise that dilutes you changes the arithmetic from that date on.
Companies inside companies
A holding company that owns an operating company that owns a flat is three levels, and Vault walks all three. It refuses a structure that would make a company its own ancestor, which is the one case the arithmetic cannot resolve.
Held directly, held through companies
The dashboard splits the two and shows both: what stands in your own name, and what reaches you through a structure. Same asset classes, same currencies, one total.
Vault tracks ownership and value. It does not do company accounting, corporation tax, or statutory filings, and it is not a substitute for your accountant.