Stock Analysis

After losing 3.7% in the past year, Alumis Inc. (NASDAQ:ALMS) institutional owners must be relieved by the recent gain

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Key Insights

  • Given the large stake in the stock by institutions, Alumis' stock price might be vulnerable to their trading decisions
  • 53% of the business is held by the top 6 shareholders
  • Using data from analyst forecasts alongside ownership research, one can better assess the future performance of a company

To get a sense of who is truly in control of Alumis Inc. (NASDAQ:ALMS), it is important to understand the ownership structure of the business. And the group that holds the biggest piece of the pie are institutions with 48% ownership. That is, the group stands to benefit the most if the stock rises (or lose the most if there is a downturn).

Institutional investors would appreciate the 8.6% increase in share price last week, given their one-year losses have totalled a disappointing 3.7%.

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

See our latest analysis for Alumis

ownership-breakdown
NasdaqGS:ALMS Ownership Breakdown December 5th 2025

What Does The Institutional Ownership Tell Us About Alumis?

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.

Alumis already has institutions on the share registry. Indeed, they own a respectable stake in the company. 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. When multiple institutions own a stock, there's always a risk that they are in a 'crowded trade'. When such a trade goes wrong, multiple parties may compete to sell stock fast. This risk is higher in a company without a history of growth. You can see Alumis' historic earnings and revenue below, but keep in mind there's always more to the story.

earnings-and-revenue-growth
NasdaqGS:ALMS Earnings and Revenue Growth December 5th 2025

It looks like hedge funds own 21% of Alumis shares. That catches my attention because hedge funds sometimes try to influence management, or bring about changes that will create near term value for shareholders. Matrix Capital Management Company, LP is currently the company's largest shareholder with 21% of shares outstanding. Foresite Capital Management, LLC is the second largest shareholder owning 15% of common stock, and Samsara BioCapital LLC holds about 5.1% of the company stock.

We also observed that the top 6 shareholders account for more than half of the share register, with a few smaller shareholders to balance the interests of the larger ones to a certain extent.

While studying institutional ownership for a company can add value to your research, it is also a good practice to research analyst recommendations to get a deeper understand of a stock's expected performance. Quite a few analysts cover the stock, so you could look into forecast growth quite easily.

Insider Ownership Of Alumis

While the precise definition of an insider can be subjective, almost everyone considers board members to be insiders. The company management answer to the board and the latter should represent the interests of shareholders. Notably, sometimes top-level managers are on the board themselves.

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 Alumis Inc.. It seems the board members have no more than US$5.2m worth of shares in the US$818m company. Many investors in smaller companies prefer to see the board more heavily invested. You can click here to see if those insiders have been buying or selling.

General Public Ownership

The general public-- including retail investors -- own 11% stake in the company, and hence can't easily be ignored. 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.

Private Equity Ownership

With a stake of 20%, private equity firms could influence the Alumis board. Sometimes we see private equity stick around for the long term, but generally speaking they have a shorter investment horizon and -- as the name suggests -- don't invest in public companies much. After some time they may look to sell and redeploy capital elsewhere.

Next Steps:

It's always worth thinking about the different groups who own shares in a company. But to understand Alumis better, we need to consider many other factors. Take risks for example - Alumis has 4 warning signs (and 3 which are potentially serious) we think you should know about.

If you are like me, you may want to think about whether this company will grow or shrink. Luckily, you can check this free report showing analyst forecasts for its 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.

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Have feedback on this article? Concerned about the content? Get in touch with us directly. Alternatively, email editorial-team (at) simplywallst.com.

This article by Simply Wall St is general in nature. We provide commentary based on historical data and analyst forecasts only using an unbiased methodology and our articles are not intended to be financial advice. It does not constitute a recommendation to buy or sell any stock, and does not take account of your objectives, or your financial situation. We aim to bring you long-term focused analysis driven by fundamental data. Note that our analysis may not factor in the latest price-sensitive company announcements or qualitative material. Simply Wall St has no position in any stocks mentioned.

About NasdaqGS:ALMS

Alumis

A clinical stage biopharmaceutical company, focuses on the development and commercialization of medicines for autoimmune disorders.

Excellent balance sheet with slight risk.

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