---
schema_version: "secwatch.filing_event.v1"
accession: "0001437749-25-008519"
form_type: "8-K"
ticker: "MPWR"
cik: "0001280452"
company_name: "MONOLITHIC POWER SYSTEMS INC"
filed_at: "2025-03-20T23:59:59+00:00"
generated_at: "2026-05-24T09:47:50.828895+00:00"
event_type: "earnings"
sentiment: "positive"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "high"
source: SEC EDGAR
---

# MPS raises Q1 2025 revenue guidance to $630M-$640M, up from prior $610M-$630M

## Summary
- Updated revenue guidance: $630M to $640M, midpoint up $15M from prior range.
- GAAP operating expenses raised to $184.9M-$190.9M from $180.2M-$186.2M.
- Non-GAAP operating expenses (excl. SBC) now $131.6M-$135.6M versus prior $126.9M-$130.9M.
- Company hosted Analyst Day on March 20, discussing strategy, products, and financials.

## SEC filing metadata
- accession: 0001437749-25-008519
- form_type: 8-K
- ticker: MPWR
- cik: 0001280452
- company_name: MONOLITHIC POWER SYSTEMS INC
- filed_at: 2025-03-20T23:59:59+00:00
- event_type: earnings
- sentiment: positive
- materiality_score: 0.6
- calibrated_materiality_score: 0.6
- confidence: high
- sec_items: 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1280452/000143774925008519/0001437749-25-008519-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1280452/000143774925008519/mpwr20250307_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001437749-25-008519
- JSON: https://secwatch.observer/filing/0001437749-25-008519.json
- Plain text: https://secwatch.observer/filing/0001437749-25-008519.txt

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