---
schema_version: "secwatch.filing_event.v1"
accession: "0001437749-23-012554"
form_type: "8-K"
ticker: "MPWR"
cik: "0001280452"
company_name: "MONOLITHIC POWER SYSTEMS INC"
filed_at: "2023-05-04T23:59:59+00:00"
generated_at: "2026-06-15T20:51:43.994630+00:00"
event_type: "earnings"
sentiment: "neutral"
materiality_score: 0.65
calibrated_materiality_score: 0.65
confidence: "high"
source: SEC EDGAR
---

# MPS Q1 revenue $451.1M up 19.4% YoY; EPS $2.26 GAAP, $3.00 non-GAAP

## Summary
- Revenue $451.1M, +19.4% YoY but -1.9% sequential; GAAP net income $109.8M, diluted EPS $2.26.
- Non-GAAP net income $146.0M, diluted EPS $3.00; non-GAAP gross margin 57.7%.
- Automotive revenue doubled YoY to $105.3M; Storage & Computing $119.8M (+24% YoY).
- Q2 guidance: revenue $430-450M (down QoQ), GAAP gross margin 55.9-56.5%.
- CEO cautious on near-term conditions; focused on long-term growth investments.

## SEC filing metadata
- accession: 0001437749-23-012554
- form_type: 8-K
- ticker: MPWR
- cik: 0001280452
- company_name: MONOLITHIC POWER SYSTEMS INC
- filed_at: 2023-05-04T23:59:59+00:00
- event_type: earnings
- sentiment: neutral
- 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/1280452/000143774923012554/0001437749-23-012554-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1280452/000143774923012554/mpwr20230428_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001437749-23-012554
- JSON: https://secwatch.observer/filing/0001437749-23-012554.json
- Plain text: https://secwatch.observer/filing/0001437749-23-012554.txt

## Key facts
- Earnings Releases
  MONOLITHIC POWER SYSTEMS INC reported the quarter ended March 31, 2023 results: revenue $451.1 million, net income $109.8 million, EPS $2.26 per diluted share. Guidance initiated.
  - Period: the quarter ended March 31, 2023
  - Revenue: $451.1 million
  - Net income: $109.8 million
  - EPS: $2.26 per diluted share
  - Guidance: initiated
  - Result: reported results
  source text: Revenue was $451.1 million for the quarter ended March 31, 2023, a 1.9% decrease from $460.0 million for the quarter ended December 31, 2022 and a 19.4% increase from $377.7 million for the quarter ended March 31, 2022.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1280452/000143774923012554/0001437749-23-012554-index.htm

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