Behind one share, a whole portfolio.Do you know what's in it?

Sofina, GBL, Exor… Each one owns businesses, listed or private, scattered across long reports. Opulion brings them together and shows you what you really own.

Quentin de Viron, founder of Opulion. I built this site to answer a simple question: when I own a holding company, what do I actually own?About us My LinkedIn profile

See an example Explore the companies

14companies covered

A real example, from our data

One Scottish Mortgage share. Here is what it holds.

From its company page, as of Aug 31, 2026: a breakdown of everything it owns. Every company page opens this way.

Gross assets

17.7 Bn £

at Aug 31, 2026

Pick a part to see what it holds.

Inside: or . Outside: the type of asset.

What the company owes

1 540 M £Borrowings on recordat Jul 31, 2026

Investment company borrowings

Published gearing, net debt to shareholders' funds: 10 % as at Jul 31, 2026.

How this figure is calculated

These borrowings are the investment company's own — the ones its published bridge to net asset value deducts. They cover the same perimeter as the gross assets the chart divides, so the share above really does measure how much of those assets is debt-financed.

Source: Scottish mortgage monthly factsheet · Jul 31, 2026

See the full Scottish Mortgage page All 14 companies we follow

What's changing. And what it means.

01 / 04Understand the news

Results, acquisitions, disposals: we explain what announcements change for the companies you follow, based on their publications.

Read the latest articles

The company you trust with your capital.

02 / 04Understand a company

Its strategy, leadership, investments and results on a single page, with the date and source of every figure.

Explore the companies

The businesses it owns.

03 / 04Explore its investments

Every published holding, its weight, and the split between listed and unlisted assets in its portfolio.

Explore the holdings

Several holding companies. Sometimes the same businesses.

04 / 04Understand your exposures

Compare their holdings to see which businesses they share and where your exposure is concentrated.

See the example portfolio

Go to chapter 1
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And in your portfolio, what do you really own?

Create your space to bring your investment companies together, explore your exposures and find the analyses that matter to you.

Build your portfolio

Pick your companies and their weights, and see what you own through their published holdings.