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Monolithic Power Systems
MPWR

860 hedge funds and large institutions have $27.1B invested in Monolithic Power Systems in 2025 Q1 according to their latest regulatory filings, with 121 funds opening new positions, 332 increasing their positions, 309 reducing their positions, and 110 closing their positions.

New
Increased
Maintained
Reduced
Closed

10% more first-time investments, than exits

New positions opened: 121 | Existing positions closed: 110

2.11% more ownership

Funds ownership: 95.41% → 97.52% (+2.1%)

7% more repeat investments, than reductions

Existing positions increased: 332 | Existing positions reduced: 309

0% less funds holding

Funds holding: 862 → 860 (-2)

2% less capital invested

Capital invested by funds: $27.6B → $27.1B (-$493M)

9% less call options, than puts

Call options by funds: $253M | Put options by funds: $277M

57% less funds holding in top 10

Funds holding in top 10: 7 → 3 (-4)

Holders
860
Holders Change
-2
Holders Change %
-0.23%
% of All Funds
11.53%
Holding in Top 10
3
Holding in Top 10 Change
-4
Holding in Top 10 Change %
-57.14%
% of All Funds
0.04%
New
121
Increased
332
Reduced
309
Closed
110
Calls
$253M
Puts
$277M
Net Calls
-$24.4M
Net Calls Change
+$261M

Top Buyers

1
T. Rowe Price Associates
T. Rowe Price Associates
Maryland
+$319M
2
Fidelity Investments
Fidelity Investments
Massachusetts
+$240M
3
VanEck Associates
VanEck Associates
New York
+$170M
4
Coatue Management
Coatue Management
New York
+$122M
5
WorldQuant Millennium Advisors
WorldQuant Millennium Advisors
New York
+$96.2M

Top Sellers

1
BlackRock
BlackRock
New York
-$321M
2
Norges Bank
Norges Bank
Norway
-$151M
3
Healthcare of Ontario Pension Plan (HOOPP) Trust Fund
Healthcare of Ontario Pension Plan (HOOPP) Trust Fund
Ontario, Canada
-$89.1M
4
Bank of Nova Scotia
Bank of Nova Scotia
Ontario, Canada
-$85.4M
5
VNIM
Vaughan Nelson Investment Management
Texas
-$82.3M
Name Holding Trade Value Shares
Change 		Change in
Stake
Capital Fund Management (CFM)
101
Capital Fund Management (CFM)
France
$31.5M -$32.8M -52,076 -49%
CIBC Private Wealth Group
102
CIBC Private Wealth Group
Georgia
$30.4M -$65.7M -104,291 -61%
WRCM
103
Whale Rock Capital Management
Massachusetts
$29.1M +$31.6M +50,150 New
TC
104
Tairen Capital
Hong Kong
$28.9M +$31.4M +49,872 New
BAMCO Inc
105
BAMCO Inc
New York
$28.9M +$26M +41,302 +486%
State Board of Administration of Florida Retirement System
106
State Board of Administration of Florida Retirement System
Florida
$28M -$567K -900 -2%
OAM
107
Ostrum Asset Management
France
$27.5M +$29.7M +47,073 +16,872%
Bank of Montreal
108
Bank of Montreal
Ontario, Canada
$27.4M +$103K +164 +0.3%
National Bank of Canada
109
National Bank of Canada
Quebec, Canada
$25.9M -$435K -690 -2%
VIP
110
Vantage Investment Partners
Missouri
$25.4M +$5.7M +9,046 +26%
ZCI
111
Zevenbergen Capital Investments
Washington
$24.8M -$145K -230 -0.5%
Vontobel Holding
112
Vontobel Holding
Switzerland
$24.7M +$2.35M +3,730 +10%
WT
113
Whittier Trust
California
$24.6M +$601K +954 +2%
EAM
114
Eventide Asset Management
Massachusetts
$24.5M +$15.1K +24 +0.1%
PM
115
Pembroke Management
Quebec, Canada
$24.5M +$2.68M +4,250 +11%
AAF
116
Andra AP-fonden
Sweden
$24.3M -$2.45M -3,881 -8%
Jennison Associates
117
Jennison Associates
New York
$24.1M +$2.29M +3,628 +10%
FMI
118
Factory Mutual Insurance
Massachusetts
$23.2M +$5.48M +8,700 +28%
TD Asset Management
119
TD Asset Management
Ontario, Canada
$23.1M +$2.56M +4,058 +11%
ClearBridge Investments
120
ClearBridge Investments
New York
$22.7M -$8.59M -13,626 -26%
GCM
121
Geneva Capital Management
Wisconsin
$22.3M +$1.29M +2,049 +6%
New York State Teachers Retirement System (NYSTRS)
122
New York State Teachers Retirement System (NYSTRS)
New York
$22M -$2.23M -3,546 -9%
SC
123
Sapient Capital
Indiana
$22M +$59.9K +95 +0.3%
CRC
124
Curi RMB Capital
Illinois
$21.5M +$1.11M +1,768 +5%
Korea Investment Corp
125
Korea Investment Corp
South Korea
$20.5M -$823K -1,306 -4%
3 4
5
6 7

MPWR Hedge Fund Activity: Q1 2025 in Review

860 of the 7,457 institutional investors tracked by Wall St. Rank reported a position in Monolithic Power Systems (MPWR) for Q1 2025, worth a combined $27.1B — down 1.8% from $27.6B a quarter earlier.

Buyers outnumbered sellers: 121 funds opened new MPWR positions and 110 closed out — a net gain of 11 holders — while 332 added to existing stakes and 309 trimmed.

The largest buyer was T. Rowe Price Associates, adding an estimated $319M. The largest seller was BlackRock, cutting an estimated $321M.

  • 860 institutional investors held Monolithic Power Systems (MPWR) as of Q1 2025, down from 862 in Q4 2024.
  • Funds reported $27.1B of Monolithic Power Systems stock for Q1 2025, down 1.8% quarter-over-quarter.
  • 121 funds opened new Monolithic Power Systems positions in Q1 2025 and 110 closed out, a net change of +11 holders.
  • The largest Monolithic Power Systems buyer in Q1 2025 was T. Rowe Price Associates, an estimated $319M added.
  • The largest Monolithic Power Systems seller in Q1 2025 was BlackRock, an estimated $321M sold.

Based on aggregated 13F filings for Q1 2025.