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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
Vanguard Group
1
Vanguard Group
Pennsylvania
$3.43B +$60.7M +96,395 +2%
BlackRock
2
BlackRock
New York
$2.85B -$321M -509,319 -9%
Fidelity Investments
3
Fidelity Investments
Massachusetts
$2.03B +$240M +380,562 +12%
State Street
4
State Street
Massachusetts
$1.23B -$27.9M -44,314 -2%
T. Rowe Price Associates
5
T. Rowe Price Associates
Maryland
$1.18B +$319M +506,430 +33%
Geode Capital Management
6
Geode Capital Management
Massachusetts
$814M +$25.6M +40,577 +3%
Franklin Resources
7
Franklin Resources
California
$779M -$60.5M -95,992 -7%
Invesco
8
Invesco
Georgia
$725M +$54.7M +86,853 +7%
VanEck Associates
9
VanEck Associates
New York
$607M +$170M +270,232 +35%
Brown Advisory
10
Brown Advisory
Maryland
$541M -$33M -52,380 -5%
Wellington Management Group
11
Wellington Management Group
Massachusetts
$442M -$57.4M -91,123 -11%
JP Morgan Chase
12
JP Morgan Chase
New York
$365M +$83.2M +132,078 +27%
Norges Bank
13
Norges Bank
Norway
$345M -$151M -240,239 -29%
Bank of America
14
Bank of America
North Carolina
$340M +$20.3M +32,231 +6%
Morgan Stanley
15
Morgan Stanley
New York
$314M +$51.2M +81,329 +18%
Northern Trust
16
Northern Trust
Illinois
$289M -$6.79M -10,777 -2%
Massachusetts Financial Services
17
Massachusetts Financial Services
Massachusetts
$265M -$19.4M -30,749 -6%
Rafferty Asset Management
18
Rafferty Asset Management
New York
$226M -$19.1M -30,340 -7%
Barclays
19
Barclays
United Kingdom
$214M +$22.6M +35,844 +11%
Kayne Anderson Rudnick Investment Management
20
Kayne Anderson Rudnick Investment Management
California
$209M -$1.03M -1,637 -0.5%
UBS Group
21
UBS Group
Switzerland
$207M -$33.6M -53,282 -13%
Bank of New York Mellon
22
Bank of New York Mellon
New York
$206M +$3.4M +5,390 +2%
Artisan Partners
23
Artisan Partners
Wisconsin
$198M -$10.7M -16,923 -5%
Legal & General Group
24
Legal & General Group
United Kingdom
$195M +$6.02M +9,555 +3%
Charles Schwab
25
Charles Schwab
California
$195M +$6.4M +10,163 +3%
1
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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.