Stock Analysis

MBX Biosciences Up 15%, Insider Buyers Are Up 53%

MBX Biosciences, Inc. (NASDAQ:MBX) insiders who purchased shares in the last 12 months were richly rewarded last week. The stock climbed by 15% resulting in a US$69m addition to the company’s market value. In other words, the original US$579.8k purchase is now worth US$886.7k.

Although we don't think shareholders should simply follow insider transactions, we do think it is perfectly logical to keep tabs on what insiders are doing.

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MBX Biosciences Insider Transactions Over The Last Year

Over the last year, we can see that the biggest insider purchase was by CEO, President & Director Peter Hawryluk for US$535k worth of shares, at about US$10.69 per share. We do like to see buying, but this purchase was made at well below the current price of US$15.37. Because it occurred at a lower valuation, it doesn't tell us much about whether insiders might find today's price attractive.

In the last twelve months MBX Biosciences insiders were buying shares, but not selling. You can see a visual depiction of insider transactions (by companies and individuals) over the last 12 months, below. If you want to know exactly who sold, for how much, and when, simply click on the graph below!

View our latest analysis for MBX Biosciences

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NasdaqGS:MBX Insider Trading Volume August 27th 2025

MBX Biosciences is not the only stock that insiders are buying. For those who like to find small cap companies at attractive valuations, this free list of growing companies with recent insider purchasing, could be just the ticket.

Does MBX Biosciences Boast High Insider Ownership?

Another way to test the alignment between the leaders of a company and other shareholders is to look at how many shares they own. We usually like to see fairly high levels of insider ownership. Insiders own 3.1% of MBX Biosciences shares, worth about US$15m. While this is a strong but not outstanding level of insider ownership, it's enough to indicate some alignment between management and smaller shareholders.

What Might The Insider Transactions At MBX Biosciences Tell Us?

It doesn't really mean much that no insider has traded MBX Biosciences shares in the last quarter. On a brighter note, the transactions over the last year are encouraging. Insiders do have a stake in MBX Biosciences and their transactions don't cause us concern. So these insider transactions can help us build a thesis about the stock, but it's also worthwhile knowing the risks facing this company. For example, MBX Biosciences has 4 warning signs (and 2 which are potentially serious) we think you should know about.

Of course, you might find a fantastic investment by looking elsewhere. So take a peek at this free list of interesting companies.

For the purposes of this article, insiders are those individuals who report their transactions to the relevant regulatory body. We currently account for open market transactions and private dispositions of direct interests only, but not derivative transactions or indirect interests.

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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:MBX

MBX Biosciences

A clinical-stage biopharmaceutical company, focuses on the discovery and development of precision peptide therapies for the treatment of endocrine and metabolic disorders.

Flawless balance sheet with slight risk.

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