Monolithic Power Systems Ownership

Who are the major shareholders and have insiders been buying or selling?

Recent Insider Transactions

BIT:1MPWR Recent Insider Transactions by Companies or Individuals
Date	Value	Name	Entity	Shares	Max Price
11 Feb 26	Sell€198,897	Maurice Sciammas	Individual	200	€994.48
06 Feb 26	Sell€54,450,117	Michael Hsing	Individual	54,923	€991.39
06 Feb 26	Sell€21,537,949	Theodore Blegen	Individual	21,725	€991.39
06 Feb 26	Sell€22,678,048	Maurice Sciammas	Individual	22,875	€991.39
06 Feb 26	Sell€22,678,048	Deming Xiao	Individual	22,875	€991.39
06 Feb 26	Sell€22,678,048	Saria Tseng	Individual	22,875	€991.39
26 Nov 25	Sell€31,575,011	Saria Tseng	Individual	40,000	€802.45
25 Nov 25	Sell€77,534	Kuo Wei Chang	Individual	100	€775.34
24 Nov 25	Sell€3,088,877	Maurice Sciammas	Individual	3,976	€776.88
21 Nov 25	Sell€76,000	Kuo Wei Chang	Individual	100	€760.00
19 Nov 25	Sell€26,677,890	Maurice Sciammas	Individual	35,000	€767.99
12 Nov 25	Sell€63,884,243	Michael Hsing	Individual	77,000	€845.40
05 Nov 25	Sell€171,942	Maurice Sciammas	Individual	200	€859.71
29 Aug 25	Sell€2,895,410	Eugen Elmiger	Individual	4,000	€726.16
27 Aug 25	Sell€144,654	Jeff Zhou	Individual	193	€749.51
15 Aug 25	Sell€14,324,612	Michael Hsing	Individual	20,231	€714.29
13 Aug 25	Sell€290,224	Jeff Zhou	Individual	400	€725.56
12 Aug 25	Sell€142,196	Jeff Zhou	Individual	200	€710.98
01 Aug 25	Sell€1,948,725	Theodore Blegen	Individual	3,000	€649.58
01 Aug 25	Sell€27,021,644	Deming Xiao	Individual	39,999	€675.56
01 Jul 25	Sell€3,822,750	Theodore Blegen	Individual	6,000	€637.13
13 May 25	Sell€33,026	Kuo Wei Chang	Individual	50	€660.51
12 May 25	Sell€7,564,912	Maurice Sciammas	Individual	12,000	€630.41
12 May 25	Sell€62,771	Kuo Wei Chang	Individual	100	€627.71
08 May 25	Sell€57,649	Kuo Wei Chang	Individual	100	€576.49

Insider Trading Volume

Insider Buying: 1MPWR insiders have only sold shares in the past 3 months.

Ownership Breakdown

What is the ownership structure of 1MPWR?
Owner Type	Number of Shares	Ownership Percentage
State or Government	48,687	0.0962%
Individual Insiders	1,921,785	3.8%
Institutions	48,653,499	96.1%

Dilution of Shares: Shareholders have not been meaningfully diluted in the past year.

Top Shareholders

Top 25 shareholders own 66.2% of the company

Ownership	Name	Shares	Current Value	Change %	Portfolio %
12.3%	The Vanguard Group, Inc.	6,034,394	€5.2b	-0.65%	0.08%
12.1%	BlackRock, Inc.	5,962,089	€5.2b	4.11%	0.08%
7.61%	FMR LLC	3,739,857	€3.2b	12.2%	0.21%
4.92%	T. Rowe Price Group, Inc.	2,415,888	€2.1b	3.93%	0.23%
4.44%	State Street Global Advisors, Inc.	2,180,419	€1.9b	2.14%	0.07%
2.81%	Geode Capital Management, LLC	1,382,280	€1.2b	3.33%	0.08%
2.13%	Franklin Resources, Inc.	1,046,992	€908.0m	-0.26%	0.34%
2.11%	Michael Hsing	1,034,099	€896.8m	-1.72%	no data
1.56%	Invesco Ltd.	767,408	€665.5m	1.48%	0.21%
1.54%	UBS Asset Management AG	757,782	€657.2m	-10.2%	0.07%
1.48%	Norges Bank Investment Management	726,705	€630.2m	21.3%	0.05%
1.43%	First Trust Advisors LP	701,454	€608.3m	56.6%	0.47%
1.36%	Invesco Capital Management LLC	667,281	€578.7m	74.3%	0.2%
1.16%	Massachusetts Financial Services Company	570,719	€494.9m	2.54%	0.14%
1.02%	Van Eck Associates Corporation	502,312	€435.6m	-31.4%	0.34%
1.02%	Brown Advisory Incorporated	500,654	€434.2m	-31.4%	0.81%
0.98%	Northern Trust Global Investments	483,700	€419.5m	-0.44%	0.07%
0.87%	JP Morgan Asset Management	426,416	€369.8m	-10.5%	0.04%
0.84%	Barclays PLC	410,465	€356.0m	24%	0.25%
0.81%	Rafferty Asset Management, LLC	396,464	€343.8m	4.52%	1.44%
0.78%	Wellington Management Group LLP	384,770	€333.7m	-15.1%	0.07%
0.74%	Charles Schwab Investment Management, Inc.	365,384	€316.9m	2.09%	0.05%
0.74%	The Goldman Sachs Group, Inc.	361,579	€313.6m	78.3%	0.15%
0.73%	Legal & General Investment Management Limited	356,639	€309.3m	-0.5%	0.07%
0.7%	Bank of America Corporation	342,534	€297.1m	-19.2%	0.09%

Company Analysis and Financial Data Status

Data	Last Updated (UTC time)
Company Analysis	2026/03/31 01:17
End of Day Share Price	2026/03/31 00:00
Earnings	2025/12/31
Annual Earnings	2025/12/31

Data Sources

The data used in our company analysis is from S&P Global Market Intelligence LLC. The following data is used in our analysis model to generate this report. Data is normalised which can introduce a delay from the source being available.

Package	Data	Timeframe	Example US Source ^*
Company Financials	10 years	Income statement Cash flow statement Balance sheet	SEC Form 10-K SEC Form 10-Q
Analyst Consensus Estimates	+3 years	Forecast financials Analyst price targets	Analyst Research Reports Blue Matrix
Market Prices	30 years	Stock prices Dividends, Splits and Actions	ICE Market Data SEC Form S-1
Ownership	10 years	Top shareholders Insider trading	SEC Form 4 SEC Form 13D
Management	10 years	Leadership team Board of directors	SEC Form 10-K SEC Form DEF 14A
Key Developments	10 years	Company announcements	SEC Form 8-K

^* Example for US securities, for non-US equivalent regulatory forms and sources are used.

Unless specified all financial data is based on a yearly period but updated quarterly. This is known as Trailing Twelve Month (TTM) or Last Twelve Month (LTM) Data. Learn more.

Analysis Model and Snowflake

Details of the analysis model used to generate this report is available on our Github page, we also have guides on how to use our reports and tutorials on Youtube.

Learn about the world class team who designed and built the Simply Wall St analysis model.

Industry and Sector Metrics

Our industry and section metrics are calculated every 6 hours by Simply Wall St, details of our process are available on Github.

Analyst Sources

Monolithic Power Systems, Inc. is covered by 25 analysts. 15 of those analysts submitted the estimates of revenue or earnings used as inputs to our report. Analysts submissions are updated throughout the day.

Analyst	Institution
Tristan Gerra	Baird
Brian Piccioni	BMO Capital Markets Equity Research
Nicholas Aberle	Brean Capital Historical (Janney Montgomery)