---
schema_version: "secwatch.filing_event.v1"
accession: "0001437749-22-024940"
form_type: "8-K"
ticker: "MPWR"
cik: "0001280452"
company_name: "MONOLITHIC POWER SYSTEMS INC"
filed_at: "2022-10-27T23:59:59+00:00"
generated_at: "2026-06-22T23:42:30.261688+00:00"
event_type: "earnings"
sentiment: "negative"
materiality_score: 0.8
calibrated_materiality_score: 0.8
confidence: "high"
source: SEC EDGAR
---

# Monolithic Power Q3 revenue $495.4M, +53% YoY; Q4 guide $450-470M signals softening

## Summary
- Q3 GAAP EPS $2.57, Non-GAAP EPS $3.53; revenue $495.4M (+53.1% YoY).
- Non-GAAP gross margin 59.0%; GAAP gross margin 58.7%.
- Enterprise Data segment revenue $75.3M, up 153% YoY from $29.7M.
- Q4 revenue guidance $450-470M (sequential decline 5-9%); gross margin 58.1-58.7%.
- CEO cites softening business conditions but expanding market share and design wins.

## SEC filing metadata
- accession: 0001437749-22-024940
- form_type: 8-K
- ticker: MPWR
- cik: 0001280452
- company_name: MONOLITHIC POWER SYSTEMS INC
- filed_at: 2022-10-27T23:59:59+00:00
- event_type: earnings
- sentiment: negative
- materiality_score: 0.8
- calibrated_materiality_score: 0.8
- confidence: high
- sec_items: 2.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1280452/000143774922024940/0001437749-22-024940-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1280452/000143774922024940/mpwr20221022_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001437749-22-024940
- JSON: https://secwatch.observer/filing/0001437749-22-024940.json
- Plain text: https://secwatch.observer/filing/0001437749-22-024940.txt

## Key facts
- Earnings Releases
  MONOLITHIC POWER SYSTEMS INC reported the quarter ended September 30, 2022 results: revenue $495.4 million, net income $124.3 million, EPS $2.57 per diluted share.
  - Period: the quarter ended September 30, 2022
  - Revenue: $495.4 million
  - Net income: $124.3 million
  - EPS: $2.57 per diluted share
  - Result: reported results
  source text: today announced financial results for the quarter ended September 30, 2022. The financial results for the quarter ended September 30, 2022 are as follows: ● Revenue was $495.4 million for the quarter ended September 30, 2022, a 7.5% increase from $461.0 million for the quarter ended June 30, 2022 and a 53.1% increase from $323.5 million for the quarter ended
  evidence_url: https://www.sec.gov/Archives/edgar/data/1280452/000143774922024940/0001437749-22-024940-index.htm
- Earnings Releases
  MONOLITHIC POWER SYSTEMS INC reported the nine months ended September 30, 2022 results: revenue $1,334.1 million.
  - Period: the nine months ended September 30, 2022
  - Revenue: $1,334.1 million
  - Result: reported results
  source text: net deferred compensation plan expense and $1.8 million for related tax effects. The financial results for the nine months ended September 30, 2022 are as follows: ● Revenue was $1,334.1 million for the nine months ended September 30, 2022, a 53.1% increase from $871.3 million for the nine months ended September 30, 2021. ● GAAP gross margin was 58.5% for the nine months
  evidence_url: https://www.sec.gov/Archives/edgar/data/1280452/000143774922024940/0001437749-22-024940-index.htm

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