---
schema_version: "secwatch.filing_event.v1"
accession: "0001437749-25-009324"
form_type: "8-K"
ticker: "MPWR"
cik: "0001280452"
company_name: "MONOLITHIC POWER SYSTEMS INC"
filed_at: "2025-03-26T23:59:59+00:00"
generated_at: "2026-05-24T04:46:31.678909+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.5
calibrated_materiality_score: 0.5
confidence: "high"
source: SEC EDGAR
---

# Monolithic Power Systems adopts amended bylaws granting stockholders right to call special meetings

## Summary
- New right permits stockholders holding at least 30% of outstanding common stock to request a special meeting.
- Requesting stockholders must have held shares continuously for at least one year prior to delivering the request.
- Amended bylaws became effective immediately on March 26, 2025 upon Board approval.
- Requests must include specified disclosures and comply with timing and procedural requirements.

## SEC filing metadata
- accession: 0001437749-25-009324
- form_type: 8-K
- ticker: MPWR
- cik: 0001280452
- company_name: MONOLITHIC POWER SYSTEMS INC
- filed_at: 2025-03-26T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.5
- calibrated_materiality_score: 0.5
- confidence: high
- sec_items: 5.03, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1280452/000143774925009324/0001437749-25-009324-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1280452/000143774925009324/mpwr20250317_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001437749-25-009324
- JSON: https://secwatch.observer/filing/0001437749-25-009324.json
- Plain text: https://secwatch.observer/filing/0001437749-25-009324.txt

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.