PubMatic, Inc. Securities Lawsuit Investigation

Shamis & Gentile P.A., one of the nation's premier class action law firms specializing in securities fraud cases, is investigating potential claims against PubMatic, Inc. (PUBM).

If you purchased or held PubMatic securities between February 27, 2025 and August 11, 2025, you may be eligible to join this class action lawsuit and seek compensation for your losses.

About PubMatic, Inc.

PubMatic, Inc. (NASDAQ: PUBM) is a programmatic digital advertising technology company. Founded in 2006 and headquartered in Redwood City, California, PubMatic provides a sell-side platform that empowers digital content creators to control access to their advertising inventory and maximize monetization.

The company’s platform enables real-time programmatic advertising transactions, connecting publishers with advertisers, agencies, and demand side platforms (DSPs).

The Allegations

Investors have filed a securities class action lawsuit against PubMatic in the United States District Court for the Northern District of California. The complaint alleges that, during the class period from February 27, 2025 to August 11, 2025, PubMatic and certain executives made materially false and misleading statements and failed to disclose critical information to investors.

According to the complaint, PubMatic did not disclose that a top DSP buyer was shifting a significant number of its clients to a new platform that evaluated inventory differently. This change resulted in a substantial reduction in ad spend and revenue from this key buyer. Despite this, PubMatic allegedly continued to make positive statements about its business, operations, and growth prospects, which were misleading and lacked a reasonable basis.

On August 11, 2025, PubMatic’s CEO and CFO revealed the impact of the DSP client’s shift during the company’s quarterly earnings call. As a result, PubMatic’s stock price dropped sharply by 21.1%, falling from $10.57 to $8.34 per share on August 12, 2025. This significant decline followed an earlier drop of nearly 24% after the Q4 2024 earnings report in February, highlighting the material impact of the undisclosed information on investors.

The lawsuit seeks to recover losses for investors who purchased or acquired PubMatic securities during the class period and suffered damages when the truth was revealed.

Important Dates

• Class period: February 27, 2025 to August 11, 2025
• Lead plaintiff deadline: October 11, 2025
• Complaint filed: August 11, 2025

Your Rights and Next Steps

If you purchased or held PubMatic, Inc. securities during the class period, you have important rights as an investor. You may be eligible to join the class action lawsuit and seek compensation for your financial losses caused by the alleged securities fraud.

You do not need to have sold your shares to participate. If you suffered losses, you can take action as part of the class. The lead plaintiff (also known as the class representative) is the investor chosen to represent the interests of all class members. If you wish to be considered for this role, you must file a motion with the court by the lead plaintiff deadline of October 11, 2025. However, you are not required to serve as lead plaintiff in order to participate and potentially recover compensation.

Lawyers are ready to help guide you through the process, answer your questions, and assist with the necessary paperwork. Participating in a class action does not require any upfront costs, and your interests will be represented alongside other affected investors.

You May Be Entitled to Compensation

If you purchased or held PubMatic securities between February 27, 2025 and August 11, 2025, you may be entitled to compensation for your losses. To find out if you qualify and to take the next step, complete the below form to join the lawsuit investigation

Lawyers are ready to help you understand your options and pursue your potential recovery.