MPWRMonolithic Power Systems, Inc.

CSNasdaq (XNAS)·USD

Identity

Security key: 18731
Ticker: MPWR
Type: CS — Common Stock
Exchange: Nasdaq(XNAS)
Venue group: NASDAQ
Operating MIC: XNAS
Market: stocks
Locale: us
Currency: USD
Listed: 2004-11-19
Round lot: 10
Active: Yes
Last seen in a load: 2026-08-14 20:49
Vendor updated: 2026-08-13 06:09
Ticker root / suffix: MPWR

Detail

Enriched 2026-08-14 20:47

Market cap: $70,029,266,430
Shares outstanding (class): 49,143,000
Shares outstanding (weighted): 49,143,000
SIC: 3674 SEMICONDUCTORS & RELATED DEVICES
Employees: 4,501
Location: WEST PALM BEACH, FL
Homepage: https://www.monolithicpower.com
Description: Monolithic Power Systems is a power chipmaker specializing in voltage regulators. Its mission is to reduce total energy consumption in end systems to improve performance and save customers cost. It serves the data center, automotive, industrial, communications, and consumer end markets. MPS uses a fabless manufacturing model, partnering with third-party chip foundries to host its proprietary BCD process technology.

Market cap and share counts drift.

Funds holding this security

521 funds · 533 positions · $16.44B reported value, as of 2026-03-31

All holders →

Fund	Ticker	Position value	% of fund	Balance	Match
VANGUARD TOTAL STOCK MARKET INDEX FUND VANGUARD INDEX FUNDS	VTI	$1.61B	0.08%	1,469,660 NS	FIGI
VANGUARD 500 INDEX FUND VANGUARD INDEX FUNDS	VOO	$1.35B	0.10%	1,238,003 NS	FIGI
Invesco QQQ Trust, Series 1 Invesco QQQ Trust, Series 1	QQQ	$1.13B	0.30%	1,034,734 NS	FIGI
VANGUARD MID-CAP INDEX FUND VANGUARD INDEX FUNDS	VO	$1.09B	0.55%	999,330 NS	FIGI
iShares Semiconductor ETF iShares Trust	SOXX	$840.69M	4.08%	768,916 NS	FIGI
iShares Core S&P 500 ETF iShares Trust	IVV	$684.38M	0.09%	625,948 NS	FIGI
N/A —	—	$620.42M	0.10%	567,446 NS	FIGI
VANGUARD GROWTH INDEX FUND VANGUARD INDEX FUNDS	VUG	$590.38M	0.19%	539,974 NS	FIGI
VanEck Semiconductor ETF VanEck ETF Trust	SMH	$504.81M	1.23%	461,706 NS	FIGI
State Street(R) Technology Select Sector SPDR(R… SELECT SECTOR SPDR TRUST	XLK	$399.37M	0.47%	365,270 NS	FIGI
First Trust Rising Dividend Achievers ETF First Trust Exchange-Traded Fund VI	RDVY	$386.36M	1.95%	353,372 NS	FIGI
VANGUARD MID-CAP GROWTH INDEX FUND VANGUARD INDEX FUNDS	VOT	$384.82M	1.32%	351,963 NS	FIGI
T. Rowe Price Mid-Cap Growth Fund, Inc. T. ROWE PRICE MID-CAP GROWTH FUND, INC.	—	$375.60M	1.67%	343,527 NS	FIGI
T. Rowe Price Blue Chip Growth Fund, Inc. T. ROWE PRICE BLUE CHIP GROWTH FUND, INC.	—	$369.41M	0.63%	337,867 NS	FIGI
iShares Russell Mid-Cap Growth ETF iShares Trust	IWP	$339.58M	1.82%	310,586 NS	FIGI

How positions resolve to the securities master. FIGI_COMPOSITE is exact identifier equality — both sides got the FIGI from Bloomberg. TICKER is a narrow fallback used only where the master row carries no FIGI at all (2,389 rows do not, disproportionately Irish-domiciled US listings like LIN and ACN). Roughly 22% of all positions resolve to the master.

Funds holding this security

Identifiers

master.security_identifier

TICKERMPWR
FIGI_COMPOSITEBBG000C30L48
FIGI_SHARE_CLASSBBG001SDRGP6
CIK0001280452
ISINUS6098391054
Resolved through OpenFIGI from a holdings ISIN, not supplied by the securities vendor.

Identifiers

Classification

classification.v_security_classification

Asset class: Equity
Sector: Information Technology
Industry: Semiconductors
Source: LLMunreviewed
Self-reported confidence: 0.95
Model: deepseek
Rationale: Monolithic Power Systems designs and sells power management semiconductors, matching the SIC code and industry classification.

Classifications are unreviewed model output. All 5,771 assignments carry source = LLM and is_reviewed = false. Confidence is the model’s own estimate and is not calibrated — it clustered at 0.90–0.98 across the whole first pass, including rows that later proved wrong. Use it to order a review queue, not as a probability. Two share classes of one issuer can disagree.

Classification

Fund data

Not linked to a fund series.

Either this is not a fund, or it is one the SEC share-class snapshot cannot reach — commodity trusts and notes have no series ID at all.