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Monolithic Power Systems MPWR · USD

Information Technology · Semiconductors & Semiconductor Equipment · US listing · 🇺🇸 United States

S&P 500Nasdaq-100

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1,388.05

+16.60%

Close of 9 Nov 2026, in USD

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Reference data, closing prices and charts across 45,000 companies, plus crypto, commodities and currencies.

Largest shareholders

As filed, so dates differ, and a group and its funds can both appear.

HolderSharesStakeChangeFiled
BLACKROCK, INC.6.1m12.57%+110.1k31 Mar 2026
The Vanguard Group, Inc.6m12.44%−40.2k31 Dec 2025
FMR LLC4.4m9.11%+423.8k31 Mar 2026
BlackRock Institutional Trust Company, N.A.4m8.27%+206.8k31 Dec 2025
Fidelity Management & Research Company LLC3.9m8.03%+411.1k31 Dec 2025
VANGUARD CAPITAL MANAGEMENT LLC3.1m6.38%+3.1m31 Mar 2026
VANGUARD PORTFOLIO MANAGEMENT LLC2.5m5.21%+2.5m31 Mar 2026
STATE STREET CORP2.2m4.53%+8k31 Mar 2026
State Street Investment Management (US)2.2m4.51%+45.7k31 Dec 2025
T. Rowe Price Associates, Inc.1.6m3.35%+119.5k31 Dec 2025
GEODE CAPITAL MANAGEMENT, LLC1.4m2.96%+49.8k31 Mar 2026
Geode Capital Management, L.L.C.1.4m2.86%+44.6k31 Dec 2025
PRICE T ROWE ASSOCIATES INC /MD/1.3m2.61%−428.4k31 Mar 2026
Invesco Capital Management (QQQ Trust)1m2.16%−31.2k31 Jan 2026
Hsing (Michael R)1m2.14%−18.1k12 Feb 2026

Insider trades

Purchases and sales by directors and officers, as filed with the regulator

DateWhoTypeSharesPriceValue
30 Mar 2026 ↗Tseng SariaEVP & General CounselSale25.7k1010.50$25.9m
20 Mar 2026 ↗Sciammas MauriceEVP, WW Sales & MarketingSale301095.07$32,852

Short interest

Shares sold short, 15 Oct 2026. US exchange data.

1.6m

-13.8% on the period before. 2.3 days to cover.

Short volume

Share of the day's trading sold short, 4 Nov 2026

24.3%

Last 60 trading days.

Failed deliveries

Shares not delivered on settlement, from the SEC

  • 21 Sept 202640 shares
  • 17 Sept 202640 shares
  • 13 Aug 202641 shares

Sources and methodology

Data on this tab
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Chart on the Overview
TradingView

Nothing here is investment advice. Prices can be delayed or wrong, so check with the exchange before relying on them. Data for this page. How we cover markets.