Caitlin John’s Monolithic Power Systems MPWR Stock Holding History

Caitlin John’s Portfolio MPWR Stock Details MPWR Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q2	$871K	Sell	630 -211	-25%	-$317K	0.48%	51
2026 Q1	$920K	Sell	841 -423	-33%	-$462K	0.55%	27
2025 Q4	$1.15M	Buy	1,264 +793	+168%	+$763K	0.75%	24
2025 Q3	$434K	Sell	471 -13	-3%	-$10.5K	0.3%	71
2025 Q2	$354K	Buy	+484	New	+$308K	0.32%	77
2025 Q1	–	Sell	-47	Closed	-$27.8K	–	540
2024 Q4	$27.8K	Hold	47	–	–	0.02%	321
2024 Q3	$28.3K	Sell	47 -708	-94%	-$611K	0.02%	336
2024 Q2	$620K	Sell	755 -17	-2%	-$12.3K	0.45%	57
2024 Q1	$523K	Buy	772 +8	+1%	+$5.34K	0.39%	58
2023 Q4	$483K	Buy	+764	New	+$399K	0.39%	59

Other funds holding MPWR

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

Invesco Atlanta, Georgia $1.26T AUM 61.52% 1-Year Est. Return

State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

T. Rowe Price Associates Baltimore, Maryland $999B AUM 46.22% 1-Year Est. Return

Franklin Resources San Mateo, California $462B AUM 39.16% 1-Year Est. Return

Goldman Sachs New York $1.15T AUM 47.82% 1-Year Est. Return

Caitlin John's MPWR Position: Q2 2026 in Review

Caitlin John reduced its Monolithic Power Systems (MPWR) stake by 25% in Q2 2026, selling an estimated $317K and leaving 630 shares worth $871K. The position accounts for 0.48% of the portfolio, ranked #51.

Caitlin John first reported a position in MPWR in Q4 2023 and has held it in 10 quarters since. The position peaked at $1.15M in Q4 2025. 1,240 funds tracked by Wall St. Rank hold MPWR as of Q2 2026.

Caitlin John held 630 shares of Monolithic Power Systems worth $871K as of Q2 2026.
Caitlin John sold 211 Monolithic Power Systems shares in Q2 2026, an estimated $317K.
Monolithic Power Systems made up 0.48% of Caitlin John's portfolio in Q2 2026, its #51 holding.
Caitlin John first reported a position in Monolithic Power Systems in Q4 2023 and has held it in 10 quarters since.
Caitlin John's Monolithic Power Systems position peaked at $1.15M in Q4 2025.
1,240 funds tracked by Wall St. Rank held Monolithic Power Systems as of Q2 2026.

Based on Caitlin John's 13F filing for Q2 2026, filed 17 Aug 2026.