Whittier Trust Co

SEC CIK: 0001137881
Latest filing: Jul 27, 2026

SEC filings (opens in a new tab)

MPWR holding history

Monolithic Power Systems, Inc. in every 13F filed by Whittier Trust Co, 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): 41,902
Value: $56.4M
% of portfolio: 0.6%
Quarters held: 22; Since Q1 2021

Holdings of MPWR by Whittier Trust Co, by quarter
Quarter	Shares	Value	% of portfolio	Share change	Action	All holders
Q2 2026	41,902	$56.4M	0.6%	−108−0.3%	Reduced	Holders
Q1 2026	42,010	$49.6M	0.6%	−2,242−5.1%	Reduced	Holders
Q4 2025	44,252	$44.5M	0.5%	+51+0.1%	Added	Holders
Q3 2025	44,201	$40.6M	0.5%	+678+1.6%	Added	Holders
Q2 2025	43,523	$31.8M	0.4%	+1,037+2.4%	Added	Holders
Q1 2025	42,486	$24.6M	0.3%	+954+2.3%	Added	Holders
Q4 2024	41,532	$24.6M	0.3%	+1,242+3.1%	Added	Holders
Q3 2024	40,290	$37.2M	0.5%	+1,406+3.6%	Added	Holders
Q2 2024	38,884	$31.9M	0.5%	+1,793+4.8%	Added	Holders
Q1 2024	37,091	$25.1M	0.4%	+1,271+3.5%	Added	Holders
Q4 2023	35,820	$22.6M	0.4%	−2,967−7.6%	Reduced	Holders
Q3 2023	38,787	$17.9M	0.3%	+846+2.2%	Added	Holders
Q2 2023	37,941	$20.5M	0.4%	−4,658−10.9%	Reduced	Holders
Q1 2023	42,599	$21.3M	0.4%	+3,507+9.0%	Added	Holders
Q4 2022	39,092	$13.8M	0.3%	−9,609−19.7%	Reduced	Holders
Q3 2022	48,701	$17.7M	0.4%	+1,991+4.3%	Added	Holders
Q2 2022	46,710	$17.9M	0.4%	+506+1.1%	Added	Holders
Q1 2022	46,204	$22.4M	0.4%	+1,881+4.2%	Added	Holders
Q4 2021	44,323	$21.9M	0.4%	−5,084−10.3%	Reduced	Holders
Q3 2021	49,407	$23.9M	0.4%	−525−1.1%	Reduced	Holders
Q2 2021	49,932	$18.6M	0.3%	+2,806+6.0%	Added	Holders
Q1 2021	47,126	$16.6M	0.3%	–	–	Holders

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