InvestorLens

MPWR — MONOLITHIC POWER SYSTEMS INC - US

Public company

Sign in to save3 tracked investors reported this
For educational research only.InvestorLens analyzes public regulatory filings (SEC EDGAR, STOCK Act PTRs) that may be delayed by 45 days or more. Information shown is historical and is not financial, legal, or tax advice, nor a recommendation or solicitation to buy or sell any security. Always do your own research.

InvestorLens aggregates public filing data to show which tracked investors reported holdings in this stock. Dollar values represent reported position values, not market capitalization, and may be delayed up to 45 days. Not a recommendation.

Sourced from SEC EDGAR public filings

Why are billionaires buying MPWR?

Built from public SEC filings and public economic data. Not a recommendation.

Confidence
95
Institutional Conviction
Net accumulation · 1 buying vs 0 selling last quarter
64
Macro Tailwind
Macro conditions are mixed for this sector
55
Congressional Activity
0 congressional purchases, 1 sale disclosed in the last 6 months
Why? — Evidence & Confidence ▾

Of 1 tracked investors who changed their MPWR position last quarter, 1 bought and 0 sold (100% buy-side). Macro conditions are mixed for this sector (Macro Tailwind 55/100 in a Squeeze regime). 0 congressional purchases, 1 sale disclosed in the last 6 months.

Supporting evidence
  • +1 tracked investor added or increased positions last quarter (Ray Dalio)
  • +3 tracked investors reported holding MPWR at their latest filing
  • +Macro Health is 55/100 in a Squeeze regime — historically acceptable for this sectorsource
Contradicting evidence — always shown
  • −Congressional disclosures lean toward selling (1 sales vs 0 purchases, 6 months)
  • −13F data is disclosed up to 45 days after quarter end — positions may have changed since
Know the limits
  • · 13F disclosure lag (up to 45 days)
  • · Tracked investors are a sample, not the whole market
  • · Sector regime fit is a historical average, not a guarantee

Every InvestorLens score shows its evidence — including what argues against it. Model conviction-v1 · generated 8/20/2026.

About MONOLITHIC POWER SYSTEMS INC - US (MPWR)

MONOLITHIC POWER SYSTEMS INC - US (MPWR) appears in the most recent 13F filings of 3 tracked institutional investors. The largest disclosed position is held by Ken Griffin (Citadel Advisors), valued at $305M. Across recent filings, tracked investors recorded 7 new positions, 0 increased, 2 reduced, and 6 exited. All data sourced from SEC 13F filings.

Smart Money Consensus™

Based on recent institutional activity in MPWR

47
/100
Mixed Activity
Added / Increased7
Reduced2
Exited6
BearishBullish
Crowded Trade Score™

How many top investors track MPWR

20
/100
Emerging Interest
3investors

A small number of top investors own this.

UndiscoveredCrowded
151015+

MPWR Ownership Composition

How MONOLITHIC POWER SYSTEMS INC - US is held across tracked investor types, based on reported 13F positions.

Dominant Type
Multi-Strategy / Quant
99% of tracked value
Institutions
3
tracked investors
Total Reported
$549.9M
combined 13F value
Types2
  • Multi-Strategy / Quant99.2%
  • Macro0.8%
Multi-Strategy / Quant(2)
99.2%
Macro(1)
0.8%

Tracked investors currently reporting MPWR

3 tracked investors have since exited this position — listed separately below.

  • Ken GriffinJun 30, 2026
    Citadel Advisors
    Shares
    221K
    Value
    $305.5M
    % Portfolio
    0.03%
  • Izzy EnglanderJun 30, 2026
    Millennium Management
    Shares
    173.7K
    Value
    $240.2M
    % Portfolio
    0.09%
  • Ray DalioJun 30, 2026
    Bridgewater Associates
    Shares
    3.1K
    Value
    $4.3M
    % Portfolio
    0.02%

Previously held MPWR

These investors reported MPWR in an earlier quarter but not in their most recent 13F. Figures below are their last reported position, not a current holding.

InvestorFirmLast reported sharesValue thenLast held
Philippe LaffontCoatue Management193.4K$112.2MMar 31, 2025
Paul Tudor JonesTudor Investment Corp200$218.7KMar 31, 2026
Steve CohenPoint72 Asset Management5.6K$5.2MSep 30, 2025

Recent activity

Frequently asked questions

How many institutional investors hold MPWR?
3 tracked institutional investors disclosed a position in MPWR (MONOLITHIC POWER SYSTEMS INC - US) in their most recent 13F filing.
Who is the largest institutional holder of MPWR?
Ken Griffin, Citadel Advisors, holds the largest disclosed position in MPWR, valued at $305M.
Did institutional ownership of MPWR increase or decrease?
Across recent 13F filings, tracked investors recorded 7 new positions, 0 increased, 2 reduced, and 6 fully exited MPWR.
Where does this MPWR ownership data come from?
SEC Form 13F-HR filings, accessed via EDGAR. 13F filings are disclosed quarterly with a 45-day reporting delay and cover U.S.-listed long equity positions only. This is not investment advice.