Overview

Basic information

Litigation

Active legal matters

Material Events

8-K disclosures

SEC Filings

Key regulatory docs

Insider Transactions

Ownership changes

Overview

Basic information

Litigation

Active legal matters

Material Events

8-K disclosures

SEC Filings

Key regulatory docs

Insider Transactions

Ownership changes

MONOLITHIC POWER SYSTEMS INC (MPWR) Class Action Lawsuit (February 2025)

In Litigation

2:25cv220 • February 4, 2025

Class Period Start

February 8, 2024

Class Period End

November 11, 2024

PSLRA Deadline

April 7, 2025

Case Allegations

10b5

Statutes of Repose

Feb 8, 2027

Country

United States

Court

Federal Court

Docket History

Sep 4, 2026

Motion for Class Certification

The plaintiffs have asked the court to approve the lawsuit to proceed as a class action on behalf of a group of investors. The judge will decide whether the case meets the requirements for class certification and which investors and claims may be included.

Jun 18, 2026

Preliminary Approval of Settlement

The court has granted preliminary approval of a proposed settlement. This means the settlement can move forward for further consideration, but it has not yet received final approval. Potential class members will generally receive notice explaining the settlement, their rights, and any deadlines for submitting a claim, objecting to the settlement, or choosing not to participate.

May 6, 2026

Motion to Dismiss Denied in Part

The court has determined that plaintiffs have adequately alleged some of their claims, but have failed to adequately allege other claims. The judge has therefore denied in part the motion to dismiss filed by defendants and written an order stating which claims are dismissed and which remain. The case will proceed and parties will litigate the remaining claims.

Mar 18, 2026

Motion for Preliminary Approval of Settlement

The parties have asked the court to give preliminary approval to a proposed settlement. The judge will review the request and decide whether the settlement can move forward to the next stage. If approved, potential class members will generally receive information about the settlement and their rights, including any deadlines for taking action.

Jan 13, 2026

Motion to Dismiss

After reviewing the complaint(s) filed by plaintiffs, defendants have filed a motion requesting that the court dismiss some or all of the plaintiffs' claims. In a motion to dismiss, defendants might challenge the validity of plaintiffs' claims or adequacy of plaintiffs' pleadings. Once a motion to dismiss is filed, the judge will make a decision on whether part or all of the case should be dismissed or the case can proceed as alleged.

Nov 12, 2025

First Amended Complaint

A new complaint has been filed on behalf of certain investors in MONOLITHIC POWER SYSTEMS INC. Amended complaints may contain additional facts, parties, allegations, a change in the class definition, etc.

Aug 25, 2025

Appointment of Lead Plaintiff

The court has appointed a lead plaintiff to represent the interests of investors in the lawsuit. The lead plaintiff works with the attorneys handling the case, helps oversee the litigation, and represents the interests of the proposed class.

Feb 4, 2025

First Filed Complaint

A securities fraud class action complaint has been filed on behalf of certain investors in MONOLITHIC POWER SYSTEMS INC.

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