Company · MPWR · CIK 1280452

Monolithic Power Systems, Inc. (MPWR) SEC filings and CIK.

MPWR’s SEC Central Index Key (CIK) is 0001280452, or 1280452 without leading zeros. The SEC’s ticker file lists it as MONOLITHIC POWER SYSTEMS, INC..

Ticker: MPWR
CIK: 0001280452
Other tickers: None
Insider transactions, Q3 2026: 39

Insider trading

In Q3 2026, insiders at Monolithic Power Systems, Inc. reported 39 non-derivative transactions on 12 Forms 3, 4 and 5, including 0 open-market purchases and 33 sales. See every MPWR insider transaction →

Recent filings we observed

No filings for this CIK appear in our current observation window. The full history is available from the filings endpoint below and on SEC.gov.

Get MPWR SEC data through the API

Filing history

curl "https://sec-api.dev/api/v1/filings?cik=1280452&limit=10" \
  -H "Authorization: Bearer $SEC_API_KEY"

Company profile

curl "https://sec-api.dev/api/v1/companies/1280452" \
  -H "Authorization: Bearer $SEC_API_KEY"

Reported XBRL facts

curl "https://sec-api.dev/api/v1/facts/1280452?taxonomy=us-gaap&concept=Revenues&limit=10" \
  -H "Authorization: Bearer $SEC_API_KEY"

Ticker to CIK API · SEC filings API · Monolithic Power Systems, Inc. on SEC.gov

Questions

What is MPWR’s CIK number?

MPWR’s SEC Central Index Key (CIK) is 0001280452, or 1280452 without leading zeros. The SEC’s ticker file lists it as MONOLITHIC POWER SYSTEMS, INC..

How do I find Monolithic Power Systems, Inc.’s 10-K?

Request /api/v1/filings?cik=1280452&form=10-K, or open the company’s EDGAR page and filter by 10-K. Foreign issuers file 20-F or 40-F instead.

Ticker and CIK: SEC company_tickers.json, cached 2026-11-02. Tickers can move between entities; the CIK identifies the filer.

Plain-text version for agents and LLMs: /companies/mpwr.md

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