Law Firms Mobilize Synopsys Investors as Securities Suit Moves Toward Lead-Plaintiff Deadline

Complaints focus on alleged nondisclosure of AI-driven customization pressures in Design IP, which preceded a 36% share-price plunge after Synopsys' Sept. 9 results.

Overview

Investors have until December 30, 2025 to seek appointment as lead plaintiff in the federal case targeting Synopsys’ disclosures.
The litigation is pending in the Northern District of California as Kim v. Synopsys, Inc., No. 3:25-cv-09410.
Filings allege the company downplayed how AI-focused customers’ added customization needs degraded Design IP economics and made prior statements misleading.
Synopsys reported Q3 2025 revenue of $1.740 billion versus lower guidance, Design IP revenue of about $426 million down 7.7% year over year, and net income of $242.5 million down 43%, after which shares fell roughly 36% the next day.
Multiple firms, including Bleichmar Fonti & Auld, Faruqi & Faruqi, Glancy Prongay & Murray, Levi & Korsinsky, and Kahn Swick & Foti, are soliciting investors, with one notice also referencing investors who received Synopsys stock in the Ansys acquisition and a subsequent filing that expanded the class period.