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S-Oil Corporation's (KRX:010950) last week's 3.2% decline must have disappointed public companies who have a significant stake

Simply Wall St·12/29/2025 21:12:18
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Key Insights

  • The considerable ownership by public companies in S-Oil indicates that they collectively have a greater say in management and business strategy
  • Saudi Arabian Oil Company owns 62% of the company
  • 13% of S-Oil is held by Institutions

If you want to know who really controls S-Oil Corporation (KRX:010950), then you'll have to look at the makeup of its share registry. We can see that public companies own the lion's share in the company with 62% ownership. In other words, the group stands to gain the most (or lose the most) from their investment into the company.

As a result, public companies as a group endured the highest losses last week after market cap fell by ₩314b.

Let's take a closer look to see what the different types of shareholders can tell us about S-Oil.

See our latest analysis for S-Oil

ownership-breakdown
KOSE:A010950 Ownership Breakdown December 29th 2025

What Does The Institutional Ownership Tell Us About S-Oil?

Institutions typically measure themselves against a benchmark when reporting to their own investors, so they often become more enthusiastic about a stock once it's included in a major index. We would expect most companies to have some institutions on the register, especially if they are growing.

As you can see, institutional investors have a fair amount of stake in S-Oil. This implies the analysts working for those institutions have looked at the stock and they like it. But just like anyone else, they could be wrong. If multiple institutions change their view on a stock at the same time, you could see the share price drop fast. It's therefore worth looking at S-Oil's earnings history below. Of course, the future is what really matters.

earnings-and-revenue-growth
KOSE:A010950 Earnings and Revenue Growth December 29th 2025

We note that hedge funds don't have a meaningful investment in S-Oil. Saudi Arabian Oil Company is currently the largest shareholder, with 62% of shares outstanding. With such a huge stake in the ownership, we infer that they have significant control of the future of the company. Meanwhile, the second and third largest shareholders, hold 7.1% and 1.4%, of the shares outstanding, respectively.

While it makes sense to study institutional ownership data for a company, it also makes sense to study analyst sentiments to know which way the wind is blowing. There are plenty of analysts covering the stock, so it might be worth seeing what they are forecasting, too.

Insider Ownership Of S-Oil

The definition of company insiders can be subjective and does vary between jurisdictions. Our data reflects individual insiders, capturing board members at the very least. Company management run the business, but the CEO will answer to the board, even if he or she is a member of it.

I generally consider insider ownership to be a good thing. However, on some occasions it makes it more difficult for other shareholders to hold the board accountable for decisions.

Our most recent data indicates that insiders own less than 1% of S-Oil Corporation. It is a pretty big company, so it would be possible for board members to own a meaningful interest in the company, without owning much of a proportional interest. In this case, they own around ₩2.1b worth of shares (at current prices). It is always good to see at least some insider ownership, but it might be worth checking if those insiders have been selling.

General Public Ownership

The general public, who are usually individual investors, hold a 25% stake in S-Oil. While this group can't necessarily call the shots, it can certainly have a real influence on how the company is run.

Public Company Ownership

We can see that public companies hold 62% of the S-Oil shares on issue. We can't be certain but it is quite possible this is a strategic stake. The businesses may be similar, or work together.

Next Steps:

While it is well worth considering the different groups that own a company, there are other factors that are even more important. For example, we've discovered 2 warning signs for S-Oil (1 can't be ignored!) that you should be aware of before investing here.

Ultimately the future is most important. You can access this free report on analyst forecasts for the company.

NB: Figures in this article are calculated using data from the last twelve months, which refer to the 12-month period ending on the last date of the month the financial statement is dated. This may not be consistent with full year annual report figures.