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The big shareholder groups in Comcast Corporation (NASDAQ:CMCS.A) have power over the company. Generally speaking, as a company grows, institutions will increase their ownership. Conversely, insiders often decrease their ownership over time. Companies that have been privatized tend to have low insider ownership.

With a market capitalization of US$203b, Comcast is rather large. We'd expect to see institutional investors on the register. Companies of this size are usually well known to retail investors, too. Taking a look at our data on the ownership groups (below), it's seems that institutions are noticeable on the share registry. Let's take a closer look to see what the different types of shareholder can tell us about CMCS.A.

See our latest analysis for Comcast

What Does The Institutional Ownership Tell Us About Comcast?

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.

We can see that Comcast does have institutional investors; and they hold 85% of the stock. This can indicate that the company has a certain degree of credibility in the investment community. However, it is best to be wary of relying on the supposed validation that comes with institutional investors. They too, get it wrong sometimes. It is not uncommon to see a big share price drop if two large institutional investors try to sell out of a stock at the same time. So it is worth checking the past earnings trajectory of Comcast, (below). Of course, keep in mind that there are other factors to consider, too.

Since institutional investors own more than half the issued stock, the board will likely have to pay attention to their preferences. Hedge funds don't have many shares in Comcast. There are a reasonable number of analysts covering the stock, so it might be useful to find out their aggregate view on the future.

Insider Ownership Of Comcast

The definition of an insider can differ slightly between different countries, but members of the board of directors always count. Company management run the business, but the CEO will answer to the board, even if he or she is a member of it.

Insider ownership is positive when it signals leadership are thinking like the true owners of the company. However, high insider ownership can also give immense power to a small group within the company. This can be negative in some circumstances.

Our most recent data indicates that insiders own less than 1% of Comcast Corporation. Being so large, we would not expect insiders to own a large proportion of the stock. Collectively, they own US$769m of stock. 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 holds a 14% stake in CMCS.A. While this size of ownership may not be enough to sway a policy decision in their favour, they can still make a collective impact on company policies.

Next Steps:

I find it very interesting to look at who exactly owns a company. But to truly gain insight, we need to consider other information, too.

Many find it useful to take an in depth look at how a company has performed in the past. You can access this detailed graph of past earnings, revenue and cash flow .

But ultimately it is the future, not the past, that will determine how well the owners of this business will do. Therefore we think it advisable to take a look at this free report showing whether analysts are predicting a brighter future.

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.

We aim to bring you long-term focused research analysis driven by fundamental data. Note that our analysis may not factor in the latest price-sensitive company announcements or qualitative material.

If you spot an error that warrants correction, please contact the editor at editorial-team@simplywallst.com. This article by Simply Wall St is general in nature. It does not constitute a recommendation to buy or sell any stock, and does not take account of your objectives, or your financial situation. Simply Wall St has no position in the stocks mentioned. Thank you for reading.