Synopsys Securities Suit Sets Dec. 30 Deadline for Lead-Plaintiff Bids

The case centers on claims that AI-driven customization eroded the economics of the company’s Design IP business.

Overview

Investor-rights firms and a shareholder information service issued fresh notices urging eligible buyers of Synopsys shares to move for lead-plaintiff status by December 30, 2025.
The action is pending in the U.S. District Court for the Northern District of California as Kim v. Synopsys, Inc., No. 25-cv-09410.
The putative class covers purchasers of Synopsys securities from December 4, 2024 through September 9, 2025.
The complaint cites Synopsys’ September 9 disclosure of Q3 2025 revenue of $1.740 billion and net income of $242.5 million, with Design IP revenue at $426.6 million and guidance implying at least a 5% full-year decline for the segment.
Shares fell 35.8% to close at $387.78 on September 10 following the results, and no class has been certified to date.