Stock Analysis

While institutions invested in Altimmune, Inc. (NASDAQ:ALT) benefited from last week's 10% gain, individual investors stood to gain the most

Advertisement

Key Insights

  • Significant control over Altimmune by individual investors implies that the general public has more power to influence management and governance-related decisions
  • The top 25 shareholders own 34% of the company
  • 40% of Altimmune is held by Institutions

To get a sense of who is truly in control of Altimmune, Inc. (NASDAQ:ALT), it is important to understand the ownership structure of the business. With 59% stake, individual investors possess the maximum shares in the company. Put another way, the group faces the maximum upside potential (or downside risk).

While individual investors were the group that reaped the most benefits after last week’s 10% price gain, institutions also received a 40% cut.

Let's delve deeper into each type of owner of Altimmune, beginning with the chart below.

See our latest analysis for Altimmune

ownership-breakdown
NasdaqGM:ALT Ownership Breakdown November 21st 2025

What Does The Institutional Ownership Tell Us About Altimmune?

Institutional investors commonly compare their own returns to the returns of a commonly followed index. So they generally do consider buying larger companies that are included in the relevant benchmark index.

As you can see, institutional investors have a fair amount of stake in Altimmune. This suggests some credibility amongst professional investors. But we can't rely on that fact alone since institutions make bad investments sometimes, just like everyone does. 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 Altimmune's historic earnings and revenue below, but keep in mind there's always more to the story.

earnings-and-revenue-growth
NasdaqGM:ALT Earnings and Revenue Growth November 21st 2025

Hedge funds don't have many shares in Altimmune. Looking at our data, we can see that the largest shareholder is The Vanguard Group, Inc. with 6.1% of shares outstanding. With 6.1% and 3.5% of the shares outstanding respectively, BlackRock, Inc. and State Street Global Advisors, Inc. are the second and third largest shareholders.

A deeper look at our ownership data shows that the top 25 shareholders collectively hold less than half of the register, suggesting a large group of small holders where no single shareholder has a majority.

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 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 Altimmune

While the precise definition of an insider can be subjective, almost everyone considers board members to be insiders. 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 information suggests that Altimmune, Inc. insiders own under 1% of the company. It seems the board members have no more than US$3.2m worth of shares in the US$479m company. We generally like to see a board more invested. However it might be worth checking if those insiders have been buying.

General Public Ownership

The general public, mostly comprising of individual investors, collectively holds 59% of Altimmune shares. This level of ownership gives investors from the wider public some power to sway key policy decisions such as board composition, executive compensation, and the dividend payout ratio.

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. To that end, you should be aware of the 2 warning signs we've spotted with Altimmune .

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.

New: Manage All Your Stock Portfolios in One Place

We've created the ultimate portfolio companion for stock investors, and it's free.

• Connect an unlimited number of Portfolios and see your total in one currency
• Be alerted to new Warning Signs or Risks via email or mobile
• Track the Fair Value of your stocks

Try a Demo Portfolio for Free

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.