Monolithic Power Systems, Inc. (MPWR)

NMS – Real Time Price. Currency in USD

1313.32

-124.98 (-8.69%)

At close: Jun 26, 2026, 4:00 PM EDT

1318.44

+5.12 (0.39%)

After-hours: Jun 26, 2026, 7:58 PM EDT

Ownership

Breakdown
3.67%	% of Shares Held by All Insider
101.06%	% of Shares Held by Institutions
104.92%	% of Float Held by Institutions
1621	Number of Institutions Holding Shares

Holder	Shares	Date Reported	% Out	Value
Blackrock Inc.	6.07M	2026-03-31	12.36%	$8.11B
FMR, LLC	4.40M	2026-03-31	8.96%	$5.88B
Vanguard Capital Management LLC	3.08M	2026-03-31	6.28%	$4.12B
Vanguard Portfolio Management LLC	2.52M	2026-03-31	5.12%	$3.36B
State Street Corporation	2.19M	2026-03-31	4.45%	$2.92B
Invesco Ltd.	1.49M	2026-03-31	3.02%	$1.98B
Geode Capital Management, LLC	1.43M	2026-03-31	2.91%	$1.91B
Price (T.Rowe) Associates Inc	1.26M	2026-03-31	2.57%	$1.69B
Franklin Resources, Inc.	928,671	2026-03-31	1.89%	$1.24B
T. Rowe Price Investment Management, Inc.	721,622	2026-03-31	1.47%	$963.37M

Holder	Shares	Date Reported	% Out	Value
Fidelity Select Portfolios-Select Semiconductors Portfolio	1.67M	2026-04-30	3.40%	$2.23B
VANGUARD INDEX FUNDS-Vanguard Total Stock Market Index Fund	1.47M	2026-03-31	2.99%	$1.96B
VANGUARD INDEX FUNDS-Vanguard 500 Index Fund	1.24M	2026-03-31	2.52%	$1.65B
Invesco QQQ Trust, Series 1	1.06M	2026-05-31	2.17%	$1.42B
VANGUARD INDEX FUNDS-Vanguard Mid-Cap Index Fund	999,330	2026-03-31	2.03%	$1.33B
iShares Trust-iShares Semiconductor ETF	794,704	2026-04-30	1.62%	$1.06B
iShares Trust-iShares Core S&P 500 ETF	629,999	2026-04-30	1.28%	$841.05M
Fidelity Securities Fund-Fidelity Blue Chip Growth Fund	625,156	2026-04-30	1.27%	$834.58M
Fidelity Concord Street Trust-Fidelity 500 Index Fund	624,199	2026-04-30	1.27%	$833.31M
SPDR S&P 500 ETF TRUST-State Street SPDR S&P 500 ETF Trust	587,410	2026-05-31	1.20%	$784.19M
SPDR S&P 500 ETF TRUST	582,394	2025-12-31	1.19%	$623.80M
SPDR S&P 500 ETF Trust	582,394	2025-12-31	1.22%	$665.52M