Lead Plaintiff Deadline Nears in PubMatic Securities Class Action

The case centers on claims that a top DSP's platform change reduced ad spend, triggering a sharp August selloff.

Overview

Investors who purchased PubMatic securities from February 27 to August 11, 2025 have until October 20, 2025 to move for lead-plaintiff status.
The lawsuit in the Northern District of California alleges the company failed to disclose that a top demand-side platform shifted clients to a new system that lowered PubMatic revenue.
On August 11, PubMatic said its outlook reflected reduced ad spend from a top DSP partner, with executives describing the platform shift as a significant headwind.
PubMatic shares fell $2.23, or 21.1%, to close at $8.34 on August 12 following the disclosure on heavy trading volume.
Multiple investor-rights firms, including Rosen, Bragar Eagel & Squire, Glancy Prongay & Murray, Pomerantz, Faruqi & Faruqi, and Howard G. Smith, are soliciting clients, and no class has been certified.