Ostrum Asset Management’s Monolithic Power Systems MPWR Stock Holding History

Ostrum Asset 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
2026 Q2	$38.6M	Buy	27,940 +7,184	+35%	+$10.8M	1.86%	13
2026 Q1	$22.7M	Sell	20,756 -26,126	-56%	-$28.5M	1.27%	26
2025 Q4	$42.5M	Buy	46,882 +5,578	+14%	+$5.37M	2.04%	11
2025 Q3	$38M	Sell	41,304 -512	-1%	-$415K	1.71%	12
2025 Q2	$30.6M	Sell	41,816 -5,536	-12%	-$3.53M	1.43%	18
2025 Q1	$27.5M	Buy	47,352 +47,073	+16,872%	+$29.7M	1.45%	16
2024 Q4	$165K	Sell	279 -10	-3%	-$7.24K	0.01%	529
2024 Q3	$267K	Buy	289 +3	+1%	+$2.59K	0.02%	467
2024 Q2	$235K	Sell	286 -21	-7%	-$15.2K	0.02%	480
2024 Q1	$208K	Hold	307	–	–	0.02%	534
2023 Q4	$194K	Buy	307 +1	+0.3%	+$522	0.02%	526
2023 Q3	$141K	Sell	306 -2	-0.6%	-$1.02K	0.01%	576
2023 Q2	$166K	Sell	308 -507	-62%	-$241K	0.01%	552
2023 Q1	$408K	Buy	+815	New	+$375K	0.04%	460

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

Ostrum Asset Management's MPWR Position: Q2 2026 in Review

Ostrum Asset Management increased its Monolithic Power Systems (MPWR) stake by 35% in Q2 2026, buying an estimated $10.8M and bringing the position to 27,940 shares worth $38.6M. The position accounts for 1.86% of the portfolio, ranked #13.

Ostrum Asset Management first reported a position in MPWR in Q1 2023 and has held it in 14 quarters since. The position peaked at $42.5M in Q4 2025. 1,235 funds tracked by Wall St. Rank hold MPWR as of Q2 2026.

Ostrum Asset Management held 27,940 shares of Monolithic Power Systems worth $38.6M as of Q2 2026.
Ostrum Asset Management bought 7,184 Monolithic Power Systems shares in Q2 2026, an estimated $10.8M.
Monolithic Power Systems made up 1.86% of Ostrum Asset Management's portfolio in Q2 2026, its #13 holding.
Ostrum Asset Management first reported a position in Monolithic Power Systems in Q1 2023 and has held it in 14 quarters since.
Ostrum Asset Management's Monolithic Power Systems position peaked at $42.5M in Q4 2025.
1,235 funds tracked by Wall St. Rank held Monolithic Power Systems as of Q2 2026.

Based on Ostrum Asset Management's 13F filing for Q2 2026, filed 13 Aug 2026.