---
schema_version: "secwatch.filing_event.v1"
accession: "0001437749-23-002781"
form_type: "8-K"
ticker: "MPWR"
cik: "0001280452"
company_name: "MONOLITHIC POWER SYSTEMS INC"
filed_at: "2023-02-08T23:59:59+00:00"
generated_at: "2026-06-19T21:32:14.062904+00:00"
event_type: "earnings"
sentiment: "positive"
materiality_score: 0.85
calibrated_materiality_score: 0.85
confidence: "high"
source: SEC EDGAR
---

# MPS Q4 revenue $460M (+37% YoY), GAAP EPS $2.45; boosts dividend 33% to $1.00

## Summary
- Q4 GAAP net income $119.1M ($2.45 diluted EPS); non-GAAP $154M ($3.17 diluted EPS).
- Full-year revenue $1.794B (+48.5% YoY); GAAP EPS $9.05; non-GAAP EPS $12.41.
- Quarterly dividend raised to $1.00/share from $0.75, payable Apr 14, 2023 to Mar 31 record date.
- Q1 2023 guidance: revenue $440-460M, GAAP gross margin 57.4%-58.0%.
- Appointed Eileen Wynne (ex-ADI CAO) to the board as Class II director effective Feb 7.

## SEC filing metadata
- accession: 0001437749-23-002781
- form_type: 8-K
- ticker: MPWR
- cik: 0001280452
- company_name: MONOLITHIC POWER SYSTEMS INC
- filed_at: 2023-02-08T23:59:59+00:00
- event_type: earnings
- sentiment: positive
- materiality_score: 0.85
- calibrated_materiality_score: 0.85
- confidence: high
- sec_items: 2.02, 5.02, 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1280452/000143774923002781/0001437749-23-002781-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1280452/000143774923002781/mpwr20230206_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001437749-23-002781
- JSON: https://secwatch.observer/filing/0001437749-23-002781.json
- Plain text: https://secwatch.observer/filing/0001437749-23-002781.txt

## Key facts
- Earnings Releases
  MONOLITHIC POWER SYSTEMS INC reported the quarter ended December 31, 2022 results: revenue $460.0 million, net income $119.1 million, EPS $2.45 per diluted share.
  - Period: the quarter ended December 31, 2022
  - Revenue: $460.0 million
  - Net income: $119.1 million
  - EPS: $2.45 per diluted share
  - Result: reported results
  source text: 14, 2023 to all stockholders of record as of the close of business on March 31, 2023. The financial results for the quarter ended December 31, 2022 are as follows: ● Revenue was $460.0 million for the quarter ended December 31, 2022, a 7.1% decrease from $495.4 million for the quarter ended September 30, 2022 and a 36.7% increase from $336.5 million for the quarter
  evidence_url: https://www.sec.gov/Archives/edgar/data/1280452/000143774923002781/0001437749-23-002781-index.htm
- Earnings Releases
  MONOLITHIC POWER SYSTEMS INC reported the year ended December 31, 2022 results: revenue $1,794.1 million.
  - Period: the year ended December 31, 2022
  - Revenue: $1,794.1 million
  - Result: reported results
  source text: ● Revenue was $1,794.1 million for the year ended December 31, 2022, a 48.5% increase from $1,207.8 million for the year ended December 31, 2021.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1280452/000143774923002781/0001437749-23-002781-index.htm
- Executive change
  Eileen Wynne was appointed as Director at MONOLITHIC POWER SYSTEMS INC.
  - Action: appointed
  - Role: Director
  source text: On February 7, 2023, the Board of Directors (the “Board”) of the Company appointed Eileen Wynne to serve as a member of the Board, effective immediately.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1280452/000143774923002781/0001437749-23-002781-index.htm

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