---
schema_version: "secwatch.filing_event.v1"
accession: "0001437749-26-006112"
form_type: "8-K"
ticker: "MPWR"
cik: "0001280452"
company_name: "MONOLITHIC POWER SYSTEMS INC"
filed_at: "2026-02-27T23:59:59+00:00"
generated_at: "2026-05-15T22:59:25.755622+00:00"
event_type: "other_material"
sentiment: "negative"
materiality_score: 0.65
calibrated_materiality_score: 0.65
confidence: "high"
source: SEC EDGAR
---

# Monolithic Power restates 2024-2025 financials due to $195M deferred tax error

## Summary
- 2024 GAAP net income decreased by $195M to $1.592B; EPS diluted $32.60 vs. prev. $36.59.
- 2025 GAAP net income increased by $5.5M to $621.5M; EPS diluted $12.86 vs. prev. $12.75.
- Error is non-cash, no impact on revenue, non-GAAP net income, or business outlook for Q1 2026.
- Restatement stems from accounting for a foreign tax incentive; no misconduct involved.
- Previously issued 2024 10-K and 2025 quarterly reports should no longer be relied upon.

## SEC filing metadata
- accession: 0001437749-26-006112
- form_type: 8-K
- ticker: MPWR
- cik: 0001280452
- company_name: MONOLITHIC POWER SYSTEMS INC
- filed_at: 2026-02-27T23:59:59+00:00
- event_type: other_material
- sentiment: negative
- materiality_score: 0.65
- calibrated_materiality_score: 0.65
- confidence: high
- sec_items: 4.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1280452/000143774926006112/0001437749-26-006112-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1280452/000143774926006112/mpwr20260225_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001437749-26-006112
- JSON: https://secwatch.observer/filing/0001437749-26-006112.json
- Plain text: https://secwatch.observer/filing/0001437749-26-006112.txt

## Source-grounded claims
- claim_id: 98999ab0ad736a357ed57e54f62f5141d87cb34b
  claim: MONOLITHIC POWER SYSTEMS INC reported that prior financial statements should not be relied upon.
  evidence_excerpt: determined that the Company’s previously issued audited consolidated financial statements included in its annual report on Form 10-K for the fiscal year ended December 31, 2024, filed on March 3, 2025, and each of the Company’s previously issued unaudited condensed consolidated financial statements included in its quarterly reports on Form 10-Q for each of the quarterly periods in 2025 (each a “Previous Filing” and collectively “Previous Filings”), should no longer be relied upon
  evidence_url: https://www.sec.gov/Archives/edgar/data/1280452/000143774926006112/0001437749-26-006112-index.htm

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