ALLEGRO MICROSYSTEMS INC

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ALGM·01749D105·US·Common Stock·Technology - Semiconductors-13D/G

ALGM (ALLEGRO MICROSYSTEMS INC) is held by 177 institutional investors as of Q2 2026. Largest holders: FMR LLC ($1.8B), BlackRock, Inc. ($967M), Invesco Ltd. ($952.3M). Net institutional sentiment: Mixed.

177

Holders

(11 Elite)

$9.7B

Total Value

55% (183)

Consensus

100 buying - 83 selling

13F: Jun 30, 2026Insider & Congress: Updated regularly

Smart Money Verdict

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Institutional (13F)66

Insider (Form 4)31

Activist (13D/13G)74

Congressional (STOCK Act)42

Holder Quality

24

★★★★★

Elite

54

★★★★

Strong

32

★★★

Solid

70

★★

Below

23

★

Weak

Held by 177 funds

11 elite

Who's Trading

Source dates: Price Oct 16, 2026 · Insiders Aug 18, 2026 · Activists Oct 7, 2026 · Congress none

ActivistFMR LLC5.3%Oct 7, 2026

InsiderRJRaubacher JennieSell $45KAug 17, 2026

ActivistInvesco Ltd.7.3%Aug 13, 2026

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Top Holders

Top Holders (177)History

AllNewIncreasedHeldDecreasedExitedFirst report

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Fund	Action	Shares	Value	Weight	Est. P&L	Conviction
FMR LLC	Decreased	25.6M(-6.7%)	$1.8B	0.1%	+11.06%	0
BlackRock, Inc.	Increased	13.9M(+11.2%)	$967M	0.0%	+13.96%	35
Invesco Ltd.	Increased	13.7M(+56.3%)	$952.3M	0.1%	-25.30%	45
JPMORGAN CHASE & CO	Increased	12.7M(+47.1%)	$844.9M	0.0%	-16.95%	43
Capital Research Global Investors	Decreased	12M(-3.5%)	$835.9M	0.1%	+18.53%	0
VPVANGUARD PORTFOLIO MANAGEMENT LLC	Decreased	7.7M(-3.2%)	$533.9M	0.0%	+2.63%	0
STATE STREET CORP	Increased	5.7M(+8.6%)	$395.2M	0.0%	+3.99%	34
VAVANGUARD CAPITAL MANAGEMENT LLC	Increased	5.5M(+0.8%)	$383.5M	0.0%	+1.65%	31
PRICE T ROWE ASSOCIATES INC /MD/	Increased	3.7M(+3160.4%)	$258.3M	0.0%	-52.67%	50
Clearbridge Investments, LLC	Increased	2.9M(+2.9%)	$205.1M	0.2%	+17.21%	38
GEODE CAPITAL MANAGEMENT, LLC	Increased	2.6M(+7.7%)	$184.2M	0.0%	+10.91%	33
DIMENSIONAL FUND ADVISORS LP	Decreased	2.1M(-2.1%)	$147.8M	0.0%	+7.97%	0
MORGAN STANLEY	Decreased	1.8M(-20.5%)	$126M	0.0%	+20.78%	0
LOOMIS SAYLES & CO L P	Decreased	1.6M(-3.2%)	$112.8M	0.1%	+15.37%	0
GOLDMAN SACHS GROUP INC	Increased	1.6M(+9.6%)	$109.7M	0.0%	+0.50%	33
PRINCIPAL FINANCIAL GROUP INC	Decreased	1.5M(-16.8%)	$103.7M	0.1%	+24.39%	0
MASSACHUSETTS FINANCIAL SERVICES CO /MA/	Increased	1.4M(+1983.1%)	$100.5M	0.0%	-52.29%	48
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	Decreased	1.4M(-2.2%)	$94.7M	0.0%	+23.50%	0
NORTHERN TRUST CORP	Increased	1.2M(+11.6%)	$81.3M	0.0%	+5.93%	33
NANOMURA ASSET MANAGEMENT INTERNATIONAL INC.	Decreased	1.2M(-44.3%)	$80.7M	0.1%	+22.16%	0

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Data sourced from four public-disclosure sources: SEC 13F, Form 4, 13D/13G, and House/Senate STOCK Act disclosures. Not financial advice. Full disclaimer