---
schema_version: "secwatch.filing_event.v1"
accession: "0001437749-23-021166"
form_type: "8-K"
ticker: "MPWR"
cik: "0001280452"
company_name: "MONOLITHIC POWER SYSTEMS INC"
filed_at: "2023-07-31T23:59:59+00:00"
generated_at: "2026-06-12T21:47:30.050126+00:00"
event_type: "earnings"
sentiment: "negative"
materiality_score: 0.65
calibrated_materiality_score: 0.65
confidence: "high"
source: SEC EDGAR
---

# Monolithic Power Systems Q2 revenue falls 4.3% YoY to $441M; Non-GAAP EPS $2.82 vs $3.25

## Summary
- Revenue $441.1M, down 4.3% YoY and 2.2% sequentially; GAAP gross margin 56.1% vs 58.8% last year.
- GAAP EPS $2.04, down from $2.37; Non-GAAP EPS $2.82, down from $3.25.
- Automotive revenue surged 71% YoY to $104.4M, partially offsetting declines in Enterprise Data and Consumer.
- Q3 revenue guidance $464M-$484M midpoint $474M, implying sequential growth of ~7.5%.
- GAAP operating income $112.3M vs $141.9M; non-GAAP operating income $153.1M vs $179.4M.

## SEC filing metadata
- accession: 0001437749-23-021166
- form_type: 8-K
- ticker: MPWR
- cik: 0001280452
- company_name: MONOLITHIC POWER SYSTEMS INC
- filed_at: 2023-07-31T23:59:59+00:00
- event_type: earnings
- sentiment: negative
- materiality_score: 0.65
- calibrated_materiality_score: 0.65
- confidence: high
- sec_items: 2.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1280452/000143774923021166/0001437749-23-021166-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1280452/000143774923021166/mpwr20230720_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001437749-23-021166
- JSON: https://secwatch.observer/filing/0001437749-23-021166.json
- Plain text: https://secwatch.observer/filing/0001437749-23-021166.txt

## Key facts
- Earnings Releases
  MONOLITHIC POWER SYSTEMS INC reported financial results for Q2 2023.
  - Period: Q2 2023
  - Result: reported results
  source text: Revenue was $441.1 million for the quarter ended June 30, 2023, a 2.2% decrease from $451.1 million for the quarter ended March 31, 2023 and a 4.3% decrease from $461.0 million for the quarter ended June 30, 2022.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1280452/000143774923021166/0001437749-23-021166-index.htm
- Earnings Releases
  MONOLITHIC POWER SYSTEMS INC reported financial results for Q2 2023.
  - Period: Q2 2023
  - Result: reported results
  source text: GAAP net income was $99.5 million and $2.04 per diluted share for the quarter ended June 30, 2023. Comparatively, GAAP net income was $114.7 million and $2.37 per diluted share for the quarter ended June 30, 2022.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1280452/000143774923021166/0001437749-23-021166-index.htm

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