Monolithic Power Systems Ownership | Who Owns Monolithic Power Systems?

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Monolithic Power Systems Ownership Summary

Monolithic Power Systems is owned by 52.72% institutional investors, 3.73% insiders, and 43.56% retail investors. Vanguard group is the largest institutional shareholder, holding 12.60% of MPWR shares. Fidelity Select Semiconductors is the top mutual fund, with 3.46% of its assets in Monolithic Power Systems shares.

MPWR Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	Monolithic Power Systems	52.72%	3.73%	43.56%
Sector	Technology Stocks	35.93%	15.14%	48.93%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Vanguard group	6.03M	12.60%	$5.47B
Blackrock funding, inc. /de	6.07M	12.52%	$6.64B
Fmr	4.40M	9.07%	$4.81B
State street	2.19M	4.51%	$2.40B
Invesco	1.49M	3.06%	$1.62B
Geode capital management	1.43M	2.95%	$1.56B
Price t rowe associates inc /md/	1.26M	2.60%	$1.38B
Franklin resources	928.67K	1.91%	$1.02B
Norges bank	726.71K	1.51%	$658.66M
T. rowe price investment management	721.62K	1.49%	$788.99M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Grandeur peak global advisors	51.49K	13.19%	$56.30M
Pembroke management	26.57K	5.76%	$36.73M
Arcadia investment management corp/mi	19.90K	3.73%	$21.76M
Connective capital management	4.11K	3.71%	$4.49M
Avalon global asset management	22.50K	3.40%	$24.60M
Carderock capital management	10.30K	3.12%	$14.24M
Natixis investment managers	63.77K	2.92%	$37.73M
4d advisors	4.00K	2.77%	$4.37M
Timessquare capital management	138.84K	2.58%	$151.80M
Zevenbergen capital investments	78.60K	2.48%	$108.66M

Top Buyers

Holder	Shares	% Assets	Change
Norges bank	726.71K	0.07%	726.71K
Fmr	4.40M	0.25%	423.82K
Royal bank of canada	473.37K	0.09%	296.79K
Vanguard fiduciary trust	278.50K	0.08%	278.50K
Axa investment managers	115.62K	0.29%	115.62K

Top Sellers

Holder	Shares	% Assets	Change
Price t rowe associates inc /md/	1.26M	0.16%	-428.44K
Capital research global investors	-	-	-256.87K
Coatue management	-	-	-193.43K
Fil	154.64K	0.13%	-161.45K
Worldquant millennium advisors	-	-	-157.40K

New Positions

Holder	Shares	% Assets	Change	Value
Norges bank	726.71K	0.07%	726.71K	$658.66M
Vanguard fiduciary trust	278.50K	0.08%	278.50K	$304.50M
Axa investment managers	115.62K	0.29%	115.62K	$106.44M
Vanguard global advisers	106.60K	0.06%	106.60K	$116.55M
Vanguard asset management	81.84K	0.08%	81.84K	$89.48M

Sold Out

Holder	Change
Palisade asset management	-1.00
Bok financial private wealth	-1.00
Highmark wealth management	-1.00
Legacy bridge	-1.00
Horizon financial services	-1.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Mar 31, 2026	838	-23.12%	25,567,911	-46.44%	52	0.53%	418	-27.43%	284	-18.39%
Dec 31, 2025	808	-20.00%	31,167,891	-55.15%	65	0.31%	411	-21.56%	270	-13.46%
Sep 30, 2025	964	4.22%	69,120,352	51.13%	144	1.58%	503	-0.98%	294	-1.67%
Jun 30, 2025	928	5.10%	47,163,715	2.50%	98	1.07%	505	10.75%	302	0.33%
Mar 31, 2025	871	-1.25%	45,843,294	-1.25%	95	1.06%	445	-4.09%	302	3.78%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
Fidelity Select Semiconductors	1.70M	3.46%	31.92K
Vanguard US Total Market Shares ETF	1.47M	3.07%	6.66K
Vanguard Total Stock Mkt Idx Inv	1.48M	3.02%	9.18K
Vanguard Institutional 500 Index Trust	1.36M	2.84%	9.51K
Vanguard 500 Index Investor	1.28M	2.60%	1.41K
Invesco QQQ Trust	1.04M	2.12%	-8.11K
Vanguard Mid Cap Index Institutional	1.01M	2.06%	7.39K
iShares Semiconductor ETF	971.63K	1.98%	-41.42K
iShares Core S&P 500 ETF	678.57K	1.38%	2.17K
VanEck Semiconductor ETF	671.67K	1.37%	-578.00

Recent Insider Transactions

Date	Name	Role	Activity	Value
Jul 15, 2026	Sciammas Maurice	EVP, WW Sales & Marketing	Sell	$616.80K
Jul 15, 2026	Sciammas Maurice	EVP, WW Sales & Marketing	Sell	$361.25K
Jul 15, 2026	Sciammas Maurice	EVP, WW Sales & Marketing	Sell	$692.49K
Jul 15, 2026	Sciammas Maurice	EVP, WW Sales & Marketing	Sell	$541.49K
Jul 15, 2026	Sciammas Maurice	EVP, WW Sales & Marketing	Sell	$1.04M

Insider Transactions Trends

Date	Buy	Sell
2026 Q3	-	19
2026 Q2	-	70
2026 Q1	-	80
2025 Q4	-	147
2025 Q3	-	39

MPWR Ownership FAQ

Who owns the most shares of Monolithic Power Systems?

Monolithic Power Systems’s largest shareholders are Vanguard group (6.03M shares, 12.60%), Blackrock funding, inc. /de (6.07M shares, 12.52%), and Fmr (4.4M shares, 9.07%). Together, they hold 34.19% of Monolithic Power Systems’s total shares outstanding.

Does Blackrock own Monolithic Power Systems?

BlackRock is not among the top 10 institutional shareholders of Monolithic Power Systems.

Who is Monolithic Power Systems’s biggest shareholder by percentage of total assets invested?

Grandeur peak global advisors is Monolithic Power Systems’s biggest shareholder by percentage of total assets invested, with 13.19% of its assets in 51.5K Monolithic Power Systems shares, valued at 56.3M$.

Who is the top mutual fund holder of Monolithic Power Systems shares?

Fidelity Select Semiconductors is the top mutual fund holder of Monolithic Power Systems shares, with 3.46% of its total shares outstanding invested in 1.7M Monolithic Power Systems shares.

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