DOSSIER · 13F Holders · Q2 2026Technology · Semiconductors & Related Devices
ALGM

ALLEGRO MICROSYSTEMS INC

397 institutions still hold ALLEGRO MICROSYSTEMS INC as of Q2 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 01749D105·Semiconductors & Related Devices·397 13F holders·last filed Jun 30, 2026
Market cap
13F value held
$8.1B
visible holders
Holders
397
filers reporting
Concentration
21.91%
FMR LLC #1
top holder share
AI Holders Summary · Q2 2026

397 institutions reported ALGM in Q2 2026. FMR LLC leads at 21.9% of the visible book.

Top holders

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

#HolderValueShares% port.Quarter
01
FMR LLC
CIK 0000315066
$1.8B25.6M0.08%Q2 2026
02
BlackRock, Inc.
CIK 0002012383
$967M13.9M0.01%Q2 2026
03
Invesco Ltd.
CIK 0000914208
$952M13.7M0.08%Q2 2026
04
JPMORGAN CHASE & CO
CIK 0000019617
$845M12.7M0.05%Q2 2026
05
Capital Research Global Investors
CIK 0001422848
$836M12.0M0.12%Q2 2026
06
Vanguard Portfolio Management
CIK 0002100121· Index
$534M7.7M0.02%Q2 2026
07
STATE STREET CORP
CIK 0000093751
$395M5.7M0.01%Q2 2026
08
VANGUARD CAPITAL MANAGEMENT LLC
CIK 0002100119· Index
$384M5.5M0.01%Q2 2026
09
Clearbridge Investments, LLC
CIK 0001348883
$205M2.9M0.17%Q2 2026
10
GEODE CAPITAL MANAGEMENT, LLC
CIK 0001214717· Index
$184M2.6M0.01%Q2 2026
11
DIMENSIONAL FUND ADVISORS LP
CIK 0000354204· Quasi-passive
$148M2.1M0.03%Q2 2026
12
MORGAN STANLEY
CIK 0000895421
$126M1.8M0.01%Q2 2026
13
LOOMIS SAYLES & CO L P
CIK 0000312348
$113M1.6M0.14%Q2 2026
14
GOLDMAN SACHS GROUP INC
CIK 0000886982
$110M1.6M0.01%Q2 2026
15
PRINCIPAL FINANCIAL GROUP INC
CIK 0001126328
$104M1.5M0.05%Q2 2026
16
MASSACHUSETTS FINANCIAL SERVICES CO /MA/
CIK 0000912938
$100M1.4M0.03%Q2 2026
17
CHARLES SCHWAB INVESTMENT MANAGEMENT INC
CIK 0000884546· Index
$95M1.4M0.01%Q2 2026
18
NORGES BANK
CIK 0001374170· Sovereign
$90M1.3M0.01%Q2 2026
19
NORTHERN TRUST CORP
CIK 0000073124· Index
$81M1.2M0.01%Q2 2026
20
Delaware Management Holdings, Inc.
CIK 0000921739
$81M1.2M0.12%Q2 2026
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Insiders at ALLEGRO MICROSYSTEMS INC
Hagen ErinWhite Brian CWillett RobertRaubacher JenniePalepu Krishna G.Puma Mary GSuzuki YoshihiroMartin Joseph R