Impax Asset Management Group plc

SEC CIK: 0001749768
Latest filing: Aug 11, 2026

SEC filings (opens in a new tab)

MPWR holding history

Monolithic Power Systems, Inc. in every 13F filed by Impax Asset Management Group plc, including the quarters it was sold out or no filing was made. Changes compare share counts with the previous calendar quarter.

MPWR overview All 13F holders of MPWR Full Q2 2026 holdings

Shares (Q2 2026): 63,427
Value: $87.7M
% of portfolio: 0.6%
Quarters held: 22; Since Q1 2021

Holdings of MPWR by Impax Asset Management Group plc, by quarter
Quarter	Shares	Value	% of portfolio	Share change	Action	All holders
Q2 2026	63,427	$87.7M	0.6%	−25,029−28.3%	Reduced	Holders
Q1 2026	88,456	$96.7M	0.7%	−17,782−16.7%	Reduced	Holders
Q4 2025	106,238	$96.3M	0.6%	−25,163−19.1%	Reduced	Holders
Q3 2025	131,401	$120.0M	0.7%	−42,443−24.4%	Reduced	Holders
Q2 2025	173,844	$126.2M	0.7%	−34,774−16.7%	Reduced	Holders
Q1 2025	208,618	$120.1M	0.7%	−29,292−12.3%	Reduced	Holders
Q4 2024	237,910	$139.9M	0.6%	+50,386+26.9%	Added	Holders
Q3 2024	187,524	$172.3M	0.7%	−24,661−11.6%	Reduced	Holders
Q2 2024	212,185	$173.3M	0.7%	−31,497−12.9%	Reduced	Holders
Q1 2024	243,682	$164.2M	0.6%	−57,977−19.2%	Reduced	Holders
Q4 2023	301,659	$189.3M	0.8%	−17,078−5.4%	Reduced	Holders
Q3 2023	318,737	$146.6M	0.7%	+1,034+0.3%	Added	Holders
Q2 2023	317,703	$170.8M	0.7%	−61,009−16.1%	Reduced	Holders
Q1 2023	378,712	$188.8M	0.8%	−79,878−17.4%	Reduced	Holders
Q4 2022	458,590	$161.4M	0.7%	+47,000+11.4%	Added	Holders
Q3 2022	411,590	$148.9M	0.8%	−10,319−2.4%	Reduced	Holders
Q2 2022	421,909	$161.3M	0.8%	−11,906−2.7%	Reduced	Holders
Q1 2022	433,815	$209.8M	0.9%	−110,813−20.3%	Reduced	Holders
Q4 2021	544,628	$267.6M	1.0%	+72,641+15.4%	Added	Holders
Q3 2021	471,987	$227.8M	0.9%	−48,867−9.4%	Reduced	Holders
Q2 2021	520,854	$193.7M	0.9%	+50,643+10.8%	Added	Holders
Q1 2021	470,211	$165.3M	0.8%	–	–	Holders

Livermore's 13F data starts with Q1 2021, so Q1 2021 has no change from the previous quarter.