Monolithic Power Systems Files 8-K

TL;DR

MPWR filed an 8-K on Nov 21 for Nov 19 events - amendments and financials.

AI Summary

Monolithic Power Systems, Inc. filed an 8-K on November 21, 2025, reporting events that occurred on November 19, 2025. The filing indicates amendments to its Articles of Incorporation or Bylaws and includes financial statements and exhibits. The company is incorporated in Delaware and headquartered in Kirkland, Washington.

Why It Matters

This 8-K filing signals potential changes in the company's governance or financial reporting structure, which could impact investors' understanding of its operations.

Risk Assessment

Risk Level: low — This filing is a routine corporate disclosure and does not appear to contain significant negative news.

Key Players & Entities

• MONOLITHIC POWER SYSTEMS, INC. (company) — Registrant
• November 19, 2025 (date) — Earliest event reported
• November 21, 2025 (date) — Date of report
• Delaware (jurisdiction) — State of incorporation
• Kirkland, Washington (location) — Principal executive offices

FAQ

Key Financial Figures

• $0.001 — ch registered Common Stock , par value $0.001 per share MPWR The NASDAQ Global Sel

Filing Documents

• mpwr20251107_8k.htm (8-K) — 29KB
• ex_888713.htm (EX-3.1) — 263KB
• 0001437749-25-035995.txt ( ) — 481KB
• mpwr-20251119.xsd (EX-101.SCH) — 3KB
• mpwr-20251119_def.xml (EX-101.DEF) — 13KB
• mpwr-20251119_lab.xml (EX-101.LAB) — 17KB
• mpwr-20251119_pre.xml (EX-101.PRE) — 13KB
• mpwr20251107_8k_htm.xml (XML) — 4KB

03 Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year

Item 5.03 Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year. On November 19, 2025, the Board of Directors (the "Board") of Monolithic Power Systems, Inc. (the "Company") adopted and approved the Company's Amended and Restated Bylaws (the "Amended Bylaws"), effective immediately. The Amended Bylaws reduce the ownership threshold (the "Ownership Threshold") necessary for stockholders to call a special meeting of stockholders from at least 30% to at least 25% of the outstanding shares of capital stock of the Company entitled to vote generally for the election of directors. In making this decision, the Board considered (i) the results of the Company's 2025 annual meeting of stockholders, in which a non-binding stockholder proposal to set the Ownership Threshold at 10% was approved by the Company's stockholders, (ii) feedback received from a majority in interest of the Company's top ten stockholders, which indicated their support for an Ownership Threshold significantly higher than the 10% threshold approved on a non-binding basis at the 2025 annual meeting of stockholders, and (iii) a review of the current landscape of the Company's peers and other public companies, among other considerations. The foregoing description of the Amended Bylaws does not purport to be complete and is qualified in its entirety by reference to the full text of the Amended Bylaws, a copy of which is filed with this Current Report on Form 8-K as Exhibit 3.1, and is incorporated herein by reference.

01 Financial Statements and Exhibits

Item 9.01 Financial Statements and Exhibits. (d) Exhibits. Exhibit Description 3.1 Amended and Restated Bylaws of Monolithic Power Systems, Inc., effective November 19, 2025. 104 Cover Page Interactive Data File (embedded within the Inline XBRL Document).

SIGNATURES

SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. Date: November 21, 2025 By: /s/ Saria Tseng Saria Tseng Executive Vice President, General Counsel

View Full Filing

View this 8-K filing on SEC EDGAR