MoonLake Immunotherapeutics Faces Lawsuit Over Phase 3 Drug Results

Understanding the Recent Developments with MoonLake Immunotherapeutics

MoonLake Immunotherapeutics has recently found itself in legal hot waters following disappointing results related to its drug candidate, sonelokimab. Investors who acquired the company’s stock (NASDAQ: MLTX) are encouraged to inquire about potential claims under federal securities laws.

What Led to This Lawsuit?

MoonLake announced on September 28, 2025, that its Phase 3 trial for sonelokimab did not meet expectations. This drug was touted as a potential game-changer in its class, but it failed to outperform Union Chimique Belge's competitor, bimekizumab-bkz, known as BIMZELX. During the testing phase, the company claimed significant advantages associated with sonelokimab's unique nanobody structure, leading many investors to believe in its superior efficacy.

The Impact of the Announcement

The announcement triggered a dramatic fall in MoonLake's stock prices. On September 29, 2025, the stock plummeted by nearly 90% to $6.24 per share, resulting in significant losses for investors who were misled by the previous optimistic statements regarding the drug's effectiveness.

Overview of the Lawsuit Details

The class-action lawsuit alleges that the company misled investors by making false statements about the drug's expected performance. Key points raised in the complaint include:

• Defendants failed to disclose that sonelokimab targeted the same molecules as BIMZELX.
• The supposed benefits of sonelokimab's nanobody structure were not supported by evidence to translate into clinical success.
• Misrepresentations about the drug's efficacy created an overly rosy picture of the company’s prospects.

Investors are now presented with an opportunity to file a lead plaintiff motion by December 15, 2025, if they purchased the stock during the period of inflated expectations.

What Should Investors Do Now?

If you are a shareholder who experienced a financial loss due to the plunge in stock value, it’s vital to consider your options. You can potentially recover losses by participating in this class action. Consulting with a legal expert or a firm like Glancy Prongay & Murray LLP can provide insights into the process and help determine the best approach for your situation.

Taking Action

For those looking to claim potential damages, get in touch with the legal team associated with this class action. They will provide guidance on how to proceed and what information you need to prepare for filing. It’s imperative to stay informed and act promptly, as the window for filing claims has a strict deadline.

Contact Information for Inquiries

For further questions or participation details, you can reach out to:

Charles Linehan, Esq.
Glancy Prongay & Murray LLP
1925 Century Park East, Suite 2100
Los Angeles, CA 90067
Email: shareholders@glancylaw.com
Phone: 310-201-9150
Toll-Free: 888-773-9224
Visit: www.glancylaw.com.

Frequently Asked Questions

What is the current status of MoonLake Immunotherapeutics?

The company is facing a class action lawsuit due to disappointing results from its Phase 3 trials for its drug candidate.

When did MoonLake announce its Phase 3 trial results?

The announcement occurred on September 28, 2025, revealing that sonelokimab did not perform as expected.

How much did the stock price drop after the announcement?

MoonLake's stock price fell by approximately 89.9%, closing at $6.24 per share the day following the announcement.

What should I do if I invested in MoonLake during the Class Period?

If you purchased stock during the specified period, consider reaching out to legal counsel regarding participating in the class action lawsuit.

Where can I find more information on this lawsuit?

For detailed information, contact Glancy Prongay & Murray LLP or visit their website for updates and further inquiries.

About The Author

Even at just 28 years old, Lucas Young has made a name for himself as a writer and financial expert. Lucas is a gifted communicator of difficult financial ideas and has written a number of well-received books and articles that appeal to both new and experienced investors. The financial world has come to rely on his perceptive analysis and useful counsel. Many people have been enabled to make wise investment decisions by Lucas's commitment to financial literacy and his ability to demystify the complexities of the market. Lucas is still dedicated to advising and teaching people on their financial journeys as he shares his knowledge.

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