13F Insight
DOSSIER · 13F Holders · Q1 2026Inflation hedgeYield
ALGM

ALLEGRO MICROSYSTEMS INC COM

335 institutions still hold ALLEGRO MICROSYSTEMS INC COM as of Q1 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 01749d105·335 13F holders·last filed Mar 31, 2026
Market cap
—
▼ 0.1%
vs prior quarter
13F value held
$3.5B
74.0% inst. owned
of float
Holders
335
-61 QoQ
filers reporting
Activity
+25 / −87
+938 added · −897 reduced
this quarter
Concentration
24.72%
FMR LLC #1
top holder share
AI Holders Summary · Q1 2026

335 institutions reported ALGM in Q1 2026. FMR LLC leads at 24.7% of the visible book. -61 net institutions QoQ — distribution reading.

Top holders

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

#HolderValueShares% port.Quarter
01
FMR LLC
CIK 0000315066
$865M27.4M0.05%Q1 202602
BlackRock, Inc.
CIK 0002012383
$394M12.5M0.01%Q1 202603
Capital Research Global Investors
CIK 0001422848
$392M12.4M0.06%Q1 202604
Invesco Ltd.
CIK 0000914208
$276M8.8M0.04%Q1 202605
Vanguard Portfolio Management
CIK 0002100121
$250M7.9M0.01%Q1 202606
JPMORGAN CHASE & CO
CIK 0000019617
$243M8.7M0.02%Q1 202607
VANGUARD CAPITAL MANAGEMENT LLC
CIK 0002100119· Index
$172M5.5M0.00%Q1 202608
STATE STREET CORP
CIK 0000093751
$165M5.2M0.01%Q1 202609
Clearbridge Investments, LLC
CIK 0001348883
$90M2.9M0.08%Q1 202610
GEODE CAPITAL MANAGEMENT, LLC
CIK 0001214717· Index
$77M2.5M0.00%Q1 202611
MORGAN STANLEY
CIK 0000895421
$72M2.3M0.00%Q1 202612
CITADEL ADVISORS LLC
CIK 0001423053
$72M2.7M0.01%Q4 202513
DIMENSIONAL FUND ADVISORS LP
CIK 0000354204· Quasi-passive
$68M2.2M0.01%Q1 202614
Delaware Management Holdings, Inc.
CIK 0000921739
$66M2.1M0.11%Q1 202615
PRINCIPAL FINANCIAL GROUP INC
CIK 0001126328
$56M1.8M0.03%Q1 202616
LOOMIS SAYLES & CO L P
CIK 0000312348
$53M1.7M0.07%Q1 202617
Analog Century Management LP
CIK 0001753384
$50M1.9M2.45%Q4 202518
ADAGE CAPITAL PARTNERS GP, L.L.C.
CIK 0001165408
$46M1.5M0.07%Q1 202619
VOYA INVESTMENT MANAGEMENT LLC
CIK 0001068837
$46M1.5M0.05%Q1 202620
ALLIANCEBERNSTEIN L.P.
CIK 0001109448
$45M1.7M0.01%Q1 2026
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