---
schema_version: "secwatch.filing_event.v1"
accession: "0001437749-22-003003"
form_type: "8-K"
ticker: "MPWR"
cik: "0001280452"
company_name: "MONOLITHIC POWER SYSTEMS INC"
filed_at: "2022-02-10T23:59:59+00:00"
generated_at: "2026-06-27T09:04:27.669481+00:00"
event_type: "earnings"
sentiment: "positive"
materiality_score: 0.85
calibrated_materiality_score: 0.85
confidence: "high"
source: SEC EDGAR
---

# Monolithic Power Systems Q4 revenue up 44% YoY to $336.5M; raises dividend 25%

## Summary
- Q4 revenue $336.5M (+44% YoY); GAAP EPS $1.51; Non-GAAP EPS $2.12.
- Full-year 2021 revenue $1,207.8M (+43% YoY); GAAP net income $242M; Non-GAAP net income $356.7M.
- Board raises quarterly dividend from $0.60 to $0.75 per share (25% increase); payable April 15, 2022.
- Q1 2022 revenue guidance $354M-$366M; Non-GAAP gross margin 57.7%-58.3%.
- CEO cites 40% fab capacity expansion in 2021; targeting >$2B capacity in 2022.

## SEC filing metadata
- accession: 0001437749-22-003003
- form_type: 8-K
- ticker: MPWR
- cik: 0001280452
- company_name: MONOLITHIC POWER SYSTEMS INC
- filed_at: 2022-02-10T23:59:59+00:00
- event_type: earnings
- sentiment: positive
- materiality_score: 0.85
- calibrated_materiality_score: 0.85
- confidence: high
- sec_items: 2.02, 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1280452/000143774922003003/0001437749-22-003003-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1280452/000143774922003003/mpwr20220208_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001437749-22-003003
- JSON: https://secwatch.observer/filing/0001437749-22-003003.json
- Plain text: https://secwatch.observer/filing/0001437749-22-003003.txt

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