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Overview
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Business Summary
Filings
Ownership
Valuation
Ownership — MPWR
Institutional Holdings
Insider Transactions
US Institutional Ownership
89.8%
Institution
Shares
Value
Ownership %
Change
Filing Date
BlackRock, Inc.
6.07M
$6.64B
12.36%
+110.1K
2026-03-31
FMR LLC
4.40M
$4.81B
8.96%
+423.8K
2026-03-31
VANGUARD CAPITAL MANAGEMENT LLC
3.08M
$3.37B
6.28%
--
2026-03-31
VANGUARD PORTFOLIO MANAGEMENT LLC
2.52M
$2.75B
5.12%
--
2026-03-31
STATE STREET CORP
2.19M
$2.40B
4.45%
+8.0K
2026-03-31
Invesco Ltd.
1.49M
$1.62B
3.02%
+50.4K
2026-03-31
GEODE CAPITAL MANAGEMENT, LLC
1.43M
$1.56B
2.91%
+49.8K
2026-03-31
PRICE T ROWE ASSOCIATES INC /MD/
1.26M
$1.38B
2.57%
-428.4K
2026-03-31
FRANKLIN RESOURCES INC
928.7K
$1.01B
1.89%
-120.7K
2026-03-31
T. Rowe Price Investment Management, Inc.
721.6K
$788.0M
1.47%
+245.3K
2026-03-31
MORGAN STANLEY
656.4K
$717.0M
1.34%
+7.3K
2026-03-31
FIRST TRUST ADVISORS LP
591.4K
$646.0M
1.20%
-110.1K
2026-03-31
GOLDMAN SACHS GROUP INC
568.1K
$621.0M
1.16%
-29.6K
2026-03-31
MASSACHUSETTS FINANCIAL SERVICES CO /MA/
567.8K
$620.0M
1.16%
-3.0K
2026-03-31
UBS Group AG
541.9K
$592.0M
1.10%
+102.9K
2026-03-31
VAN ECK ASSOCIATES CORP
524.6K
$573.0M
1.07%
+22.3K
2026-03-31
NORTHERN TRUST CORP
489.1K
$534.0M
1.00%
+5.4K
2026-03-31
Voya Investment Management LLC
393.6K
$429.0M
0.80%
+53.8K
2026-03-31
BANK OF AMERICA CORP /DE/
382.2K
$417.0M
0.78%
-167.4K
2026-03-31
Legal & General Group Plc
380.1K
$415.0M
0.77%
+23.4K
2026-03-31
BROWN ADVISORY INC
379.9K
$415.0M
0.77%
-120.9K
2026-03-31
CHARLES SCHWAB INVESTMENT MANAGEMENT INC
376.4K
$411.0M
0.77%
+11.0K
2026-03-31
CITIGROUP INC
340.8K
$372.0M
0.69%
+95.4K
2026-03-31
Rafferty Asset Management, LLC
317.5K
$347.0M
0.65%
-79.0K
2026-03-31
UBS AM, A DISTINCT BUSINESS UNIT OF UBS ASSET MANAGEMENT AMERICAS LLC
302.2K
$330.0M
0.62%
-16.6K
2026-03-31
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