Monolithic Power Systems Inc

MASSACHUSETTS FINANCIAL SERVICES CO /MA/ MPWR

Report date

3/31/2026

Quarter

2026 Q1

Filed

5/14/2026

Shares

567,769

Value ($000)

620,749

Weight

0.2%

2019 Q3 - 2026 Q1 (27 filings)

Shares History

History scope: non-option holdings only (PUT/CALL rows excluded).

All 13F Holders	Filing date	Value ($000s)	% of Holdings	Shares	Reporting period
2026 Q1	5/14/2026	620,749	0.2%	567,769	3/31/2026
2025 Q4	1/22/2026	517,277	0.2%	570,719	12/31/2025
2025 Q3	10/29/2025	512,416	0.2%	556,587	9/30/2025
2025 Q2	8/8/2025	355,003	0.1%	485,388	6/30/2025
2025 Q1	5/2/2025	265,370	0.1%	457,551	3/31/2025
2024 Q4	2/12/2025	288,927	0.1%	488,300	12/31/2024
2024 Q3	11/12/2024	626,897	0.2%	678,093	9/30/2024
2024 Q2	8/9/2024	773,510	0.2%	941,376	6/30/2024
2024 Q1	5/14/2024	667,286	0.2%	985,041	3/31/2024
2023 Q4	2/8/2024	666,219	0.2%	1,056,183	12/31/2023
2023 Q3	11/8/2023	486,522	0.2%	1,053,078	9/30/2023
2023 Q2	8/9/2023	589,505	0.2%	1,091,211	6/30/2023
2023 Q1	5/10/2023	566,064	0.2%	1,130,907	3/31/2023
2022 Q4	2/13/2023	396,027	0.1%	1,119,953	12/31/2022
2022 Q3	11/9/2022	464,010	0.2%	1,276,853	9/30/2022
2022 Q2	8/9/2022	488,952	0.2%	1,273,178	6/30/2022
2022 Q1	5/11/2022	548,768	0.2%	1,129,893	3/31/2022
2021 Q4	2/10/2022	564,690	0.2%	1,144,650	12/31/2021
2021 Q3	11/10/2021	591,478	0.2%	1,220,347	9/30/2021
2021 Q2	8/13/2021	460,007	0.1%	1,231,776	6/30/2021
2021 Q1	5/13/2021	440,974	0.1%	1,248,472	3/31/2021
2020 Q4	5/12/2021	448,770	0.1%	1,225,377	12/31/2020
2020 Q3	11/12/2020	351,205	0.1%	1,256,050	9/30/2020
2020 Q2	11/20/2020	289,355	0.1%	1,220,903	6/30/2020
2020 Q1	11/20/2020	177,315	0.1%	1,058,850	3/31/2020
2019 Q4	11/25/2020	202,710	0.1%	1,138,693	12/31/2019
2019 Q3	11/20/2020	148,078	0.1%	951,482	9/30/2019