---
schema_version: "secwatch.filing_event.v1"
accession: "0001437749-25-014082"
form_type: "8-K"
ticker: "MPWR"
cik: "0001280452"
company_name: "MONOLITHIC POWER SYSTEMS INC"
filed_at: "2025-05-01T23:59:59+00:00"
generated_at: "2026-05-22T23:52:23.274520+00:00"
event_type: "earnings"
sentiment: "positive"
materiality_score: 0.75
calibrated_materiality_score: 0.75
confidence: "high"
source: SEC EDGAR
---

# Monolithic Power Systems Q1 revenue $637.6M (+39% YoY); guides Q2 $640-660M

## Summary
- GAAP diluted EPS $2.79 vs $1.89 a year ago; non-GAAP EPS $4.04 vs $2.81.
- Storage & Computing revenue $188.5M (+77.7% YoY); Enterprise Data $132.9M (-11.2% YoY).
- Automotive revenue $144.9M (+66.4% YoY), third consecutive quarter of double-digit sequential growth.
- Q2 2025 revenue guidance $640-660M; non-GAAP gross margin 55.2%-55.8%.
- Operating cash flow $256.4M; cash and short-term investments $1,026.7M.

## SEC filing metadata
- accession: 0001437749-25-014082
- form_type: 8-K
- ticker: MPWR
- cik: 0001280452
- company_name: MONOLITHIC POWER SYSTEMS INC
- filed_at: 2025-05-01T23:59:59+00:00
- event_type: earnings
- sentiment: positive
- materiality_score: 0.75
- calibrated_materiality_score: 0.75
- confidence: high
- sec_items: 2.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1280452/000143774925014082/0001437749-25-014082-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1280452/000143774925014082/mpwr20250305c_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001437749-25-014082
- JSON: https://secwatch.observer/filing/0001437749-25-014082.json
- Plain text: https://secwatch.observer/filing/0001437749-25-014082.txt

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