13F Insight
DOSSIER · 13F Holders · Q1 2026Technology · Semiconductors & Related DevicesDefensive growthQuality
MPWR

MONOLITHIC PWR SYS INC

1,175 institutions still hold MONOLITHIC PWR SYS INC as of Q1 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 609839105·Semiconductors & Related Devices·1,175 13F holders·last filed Mar 31, 2026
Market cap
—
▼ 6.0%
vs prior quarter
13F value held
$30.9B
78.0% inst. owned
of float
Holders
1,175
-47 QoQ
filers reporting
Activity
+8 / −33
+1,004 added · −876 reduced
this quarter
Concentration
21.50%
BlackRock, Inc. #1
top holder share
AI Holders Summary · Q1 2026

1,175 institutions reported MPWR in Q1 2026. BlackRock, Inc. leads at 21.5% of the visible book. -47 net institutions QoQ — distribution reading.

Top holders

Sorted by position value. Source: SEC EDGAR 13F-HR filings.

#HolderValueShares% port.Quarter
01
BlackRock, Inc.
CIK 0002012383
$6.6B6.1M0.12%Q1 202602
FMR LLC
CIK 0000315066
$4.8B4.4M0.25%Q1 202603
VANGUARD CAPITAL MANAGEMENT LLC
CIK 0002100119· Index
$3.4B3.1M0.08%Q1 202604
Vanguard Portfolio Management
CIK 0002100121· Index
$2.8B2.5M0.14%Q1 202605
STATE STREET CORP
CIK 0000093751
$2.4B2.2M0.08%Q1 202606
Invesco Ltd.
CIK 0000914208
$1.6B1.5M0.25%Q1 202607
GEODE CAPITAL MANAGEMENT, LLC
CIK 0001214717· Index
$1.6B1.4M0.10%Q1 202608
FRANKLIN RESOURCES INC
CIK 0000038777
$1.0B929K0.25%Q1 202609
MORGAN STANLEY
CIK 0000895421
$718M656K0.04%Q1 202610
FIRST TRUST ADVISORS LP
CIK 0001125816· Index
$647M591K0.46%Q1 202611
GOLDMAN SACHS GROUP INC
CIK 0000886982
$621M568K0.07%Q1 202612
MASSACHUSETTS FINANCIAL SERVICES CO /MA/
CIK 0000912938
$621M568K0.21%Q1 202613
BARCLAYS PLC
CIK 0000312069
$608M556K0.15%Q1 202614
UBS Group AG
CIK 0001610520
$593M542K0.09%Q1 202615
JPMORGAN CHASE & CO
CIK 0000019617
$556M555K0.04%Q1 202616
NORTHERN TRUST CORP
CIK 0000073124· Index
$535M489K0.07%Q1 202617
ROYAL BANK OF CANADA
CIK 0001000275
$518M473K0.09%Q1 202618
BROWN ADVISORY INC
CIK 0001345929
$454M501K0.63%Q4 202519
VOYA INVESTMENT MANAGEMENT LLC
CIK 0001068837
$430M394K0.45%Q1 202620
BANK OF AMERICA CORP /DE/
CIK 0000070858
$418M382K0.03%Q1 2026
Page 1 of 59
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