Longfellow Investment Management’s Monolithic Power Systems MPWR Stock Holding History

Longfellow Investment Management’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
2025 Q4	–	Sell	-3	Closed	-$2.76K	–	257
2025 Q3	$2.76K	Hold	3	–	–	﹤0.01%	213
2025 Q2	$2.19K	Hold	3	–	–	﹤0.01%	218
2025 Q1	$1.74K	Hold	3	–	–	﹤0.01%	235
2024 Q4	$1.77K	Hold	3	–	–	﹤0.01%	236
2024 Q3	$2.77K	Hold	3	–	–	﹤0.01%	209
2024 Q2	$2.46K	Hold	3	–	–	﹤0.01%	205
2024 Q1	$2.03K	Hold	3	–	–	﹤0.01%	227
2023 Q4	$1.89K	Hold	3	–	–	﹤0.01%	205
2023 Q3	$1.39K	Hold	3	–	–	﹤0.01%	199
2023 Q2	$1.62K	Hold	3	–	–	﹤0.01%	224
2023 Q1	$1.5K	Hold	3	–	–	﹤0.01%	229
2022 Q4	$1.06K	Buy	3 +1	+50%	+$359	﹤0.01%	246
2022 Q3	$1K	Hold	2	–	–	﹤0.01%	316
2022 Q2	$1K	Hold	2	–	–	﹤0.01%	345
2022 Q1	$1K	Hold	2	–	–	﹤0.01%	379
2021 Q4	$1K	Buy	2 +1	+100%	+$516	﹤0.01%	381
2021 Q3	$1K	Hold	1	–	–	﹤0.01%	407
2021 Q2	$1K	Hold	1	–	–	﹤0.01%	425
2021 Q1	$1K	Hold	1	–	–	﹤0.01%	482
2020 Q4	$1K	Buy	+1	New	+$320	﹤0.01%	499

Other funds holding MPWR

Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return

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

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

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

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

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

Norges Bank Oslo, Norway $1T AUM

T. Rowe Price Investment Management Baltimore, Maryland $153B AUM 38.14% 1-Year Est. Return

Longfellow Investment Management's MPWR Position: Q4 2025 in Review

Longfellow Investment Management sold out of Monolithic Power Systems (MPWR) in Q4 2025, closing a stake of 3 shares — an estimated $2.76K sold.

Longfellow Investment Management first reported a position in MPWR in Q4 2020 and held it in 20 quarters. The position peaked at $2.77K in Q3 2024. 1,061 funds tracked by Wall St. Rank hold MPWR as of Q4 2025.

Longfellow Investment Management reported no remaining Monolithic Power Systems position as of Q4 2025 after selling out during the quarter.
Longfellow Investment Management sold 3 Monolithic Power Systems shares in Q4 2025, an estimated $2.76K.
Longfellow Investment Management first reported a position in Monolithic Power Systems in Q4 2020 and held it in 20 quarters.
Longfellow Investment Management's Monolithic Power Systems position peaked at $2.77K in Q3 2024.
1,061 funds tracked by Wall St. Rank held Monolithic Power Systems as of Q4 2025.

Based on Longfellow Investment Management's 13F filing for Q4 2025, filed 11 Feb 2026.