How many institutional investors hold ALGM?

1 tracked institutional investor disclosed a position in ALGM (ALLEGRO MICROSYSTEMS INC) in their most recent 13F filing.

Who is the largest institutional holder of ALGM?

Ken Griffin, Citadel Advisors, holds the largest disclosed position in ALGM, valued at $112M.

Where does this ALGM ownership data come from?

SEC Form 13F-HR filings, accessed via EDGAR. 13F filings are disclosed quarterly with a 45-day reporting delay and cover U.S.-listed long equity positions only. This is not investment advice.

ALGM — ALLEGRO MICROSYSTEMS INC

Name: ALLEGRO MICROSYSTEMS INC (ALGM) — Institutional Ownership
Creator: InvestorLens
License: https://www.sec.gov/about/website-policies

Public company

For educational research only.InvestorLens analyzes public regulatory filings (SEC EDGAR, STOCK Act PTRs) that may be delayed by 45 days or more. Information shown is historical and is not financial, legal, or tax advice, nor a recommendation or solicitation to buy or sell any security. Always do your own research.

InvestorLens aggregates public filing data to show which tracked investors reported holdings in this stock. Dollar values represent reported position values, not market capitalization, and may be delayed up to 45 days. Not a recommendation.

Sourced from SEC EDGAR public filings

Why are billionaires buying ALGM?

Built from public SEC filings and public economic data. Not a recommendation.

Confidence

Institutional Conviction

Strong distribution · 0 buying vs 4 selling last quarter

Macro Tailwind

Macro conditions are mixed for this sector

Why? — Evidence & Confidence ▾

Of 4 tracked investors who changed their ALGM position last quarter, 0 bought and 4 sold (0% buy-side). Macro conditions are mixed for this sector (Macro Tailwind 56/100 in a Overheat regime).

Supporting evidence

+1 tracked investors reported holding ALGM at their latest filing
+Macro Health is 56/100 in a Overheat regime — historically acceptable for this sectorsource

Contradicting evidence — always shown

−4 tracked investors reduced or exited last quarter (1 reduced, 3 sold out)
−13F data is disclosed up to 45 days after quarter end — positions may have changed since

Know the limits

· 13F disclosure lag (up to 45 days)
· Tracked investors are a sample, not the whole market
· Sector regime fit is a historical average, not a guarantee

Every InvestorLens score shows its evidence — including what argues against it. Model conviction-v1 · generated 9/18/2026.

About ALLEGRO MICROSYSTEMS INC (ALGM)

ALLEGRO MICROSYSTEMS INC (ALGM) appears in the most recent 13F filings of 1 tracked institutional investor. The largest disclosed position is held by Ken Griffin (Citadel Advisors), valued at $112M. Across recent filings, tracked investors recorded 7 new positions, 11 increased, 8 reduced, and 6 exited. All data sourced from SEC 13F filings.

Smart Money Consensus™

Based on recent institutional activity in ALGM

/100

Mixed Activity

Added / Increased18

Reduced8

Exited6

BearishBullish

Crowded Trade Score™

How many top investors track ALGM

/100

Undiscovered

1investor

Only 1 tracked investor report this position.

UndiscoveredCrowded

151015+

ALGM Ownership Composition

How ALLEGRO MICROSYSTEMS INC is held across tracked investor types, based on reported 13F positions.

Dominant Type

Multi-Strategy / Quant

100% of tracked value

Institutions

tracked investors

Total Reported

$13.7M

combined 13F value

Multi-Strategy / Quant100.0%

Multi-Strategy / Quant(1)

100.0%

Tracked investors currently reporting ALGM

4 tracked investors have since exited this position — listed separately below.

Investor	Firm	Shares	Market value	% of portfolio	As of
Ken Griffin	Citadel Advisors	196.1K	$13.7M	0.00%	Jun 30, 2026

Ken GriffinJun 30, 2026
Citadel Advisors
Shares
196.1K
Value
$13.7M
% Portfolio
0.00%

Previously held ALGM

These investors reported ALGM in an earlier quarter but not in their most recent 13F. Figures below are their last reported position, not a current holding.

Investor	Firm	Last reported shares	Value then	Last held
Izzy Englander	Millennium Management	28.1K	$886.8K	Mar 31, 2026
Steve Cohen	Point72 Asset Management	1.1M	$30.3M	Dec 31, 2025
Ray Dalio	Bridgewater Associates	16.6K	$524.8K	Mar 31, 2026
Paul Tudor Jones	Tudor Investment Corp	37.1K	$1.2M	Mar 31, 2026

Recent activity

Investor	Action	Δ %	Current value	Filing date
Izzy Englander	Reduced	-33.52%	$15.7M	Nov 14, 2024
Izzy Englander	Increased	96.85%	$29M	Feb 14, 2025
Izzy Englander	Increased	81.36%	$60.4M	May 15, 2025
Izzy Englander	Reduced	-69.72%	$24.9M	Aug 14, 2025
Izzy Englander	Increased	52.44%	$37.3M	Feb 17, 2026
Izzy Englander	Reduced	-98.01%	$886.8K	May 15, 2026
Izzy Englander	Sold	-100.00%	$0	Aug 14, 2026
Ken Griffin	Increased	375.78%	$37.6M	Nov 14, 2024
Ken Griffin	Increased	136.07%	$112.1M	May 15, 2025
Ken Griffin	Reduced	-59.59%	$61.6M	Aug 14, 2025
Ken Griffin	Reduced	-72.37%	$14.5M	Nov 14, 2025
Ken Griffin	Increased	445.16%	$71.6M	Feb 17, 2026
Ken Griffin	Reduced	-58.00%	$13.7M	Aug 14, 2026
Ray Dalio	New	—	$2.7M	Aug 14, 2024
Ray Dalio	Sold	-100.00%	$0	Nov 13, 2024
Ray Dalio	New	—	$2.6M	Aug 13, 2025
Ray Dalio	Sold	-100.00%	$0	Nov 13, 2025
Ray Dalio	New	—	$524.8K	May 15, 2026
Ray Dalio	Sold	-100.00%	$0	Aug 14, 2026
Steve Cohen	New	—	$10.1M	Aug 14, 2025
Steve Cohen	Increased	235.01%	$28.8M	Nov 14, 2025
Steve Cohen	Increased	16.53%	$30.3M	Feb 17, 2026
Steve Cohen	Sold	-100.00%	$0	May 15, 2026
Paul Tudor Jones	New	—	$309.9K	Nov 14, 2024
Paul Tudor Jones	Reduced	-24.06%	$220.8K	Feb 14, 2025
Paul Tudor Jones	Increased	56.44%	$397.1K	May 15, 2025
Paul Tudor Jones	Increased	89.87%	$1M	Aug 14, 2025
Paul Tudor Jones	Reduced	-71.67%	$248.2K	Dec 9, 2025
Paul Tudor Jones	Increased	44.66%	$1.2M	May 15, 2026
Paul Tudor Jones	Sold	-100.00%	$0	Aug 14, 2026
Ken Griffin	New	—	$9.6M	Aug 14, 2024
Izzy Englander	New	—	$41.2M	May 15, 2024

Izzy Englander
Reduced
$15.7M(-33.52%)Nov 14, 2024
Izzy Englander
Increased
$29M(96.85%)Feb 14, 2025
Izzy Englander
Increased
$60.4M(81.36%)May 15, 2025
Izzy Englander
Reduced
$24.9M(-69.72%)Aug 14, 2025
Izzy Englander
Increased
$37.3M(52.44%)Feb 17, 2026
Izzy Englander
Reduced
$886.8K(-98.01%)May 15, 2026
Izzy Englander
Sold
$0(-100.00%)Aug 14, 2026
Ken Griffin
Increased
$37.6M(375.78%)Nov 14, 2024
Ken Griffin
Increased
$112.1M(136.07%)May 15, 2025
Ken Griffin
Reduced
$61.6M(-59.59%)Aug 14, 2025
Ken Griffin
Reduced
$14.5M(-72.37%)Nov 14, 2025
Ken Griffin
Increased
$71.6M(445.16%)Feb 17, 2026
Ken Griffin
Reduced
$13.7M(-58.00%)Aug 14, 2026
Ray Dalio
New
$2.7MAug 14, 2024
Ray Dalio
Sold
$0(-100.00%)Nov 13, 2024
Ray Dalio
New
$2.6MAug 13, 2025
Ray Dalio
Sold
$0(-100.00%)Nov 13, 2025
Ray Dalio
New
$524.8KMay 15, 2026
Ray Dalio
Sold
$0(-100.00%)Aug 14, 2026
Steve Cohen
New
$10.1MAug 14, 2025
Steve Cohen
Increased
$28.8M(235.01%)Nov 14, 2025
Steve Cohen
Increased
$30.3M(16.53%)Feb 17, 2026
Steve Cohen
Sold
$0(-100.00%)May 15, 2026
Paul Tudor Jones
New
$309.9KNov 14, 2024
Paul Tudor Jones
Reduced
$220.8K(-24.06%)Feb 14, 2025
Paul Tudor Jones
Increased
$397.1K(56.44%)May 15, 2025
Paul Tudor Jones
Increased
$1M(89.87%)Aug 14, 2025
Paul Tudor Jones
Reduced
$248.2K(-71.67%)Dec 9, 2025
Paul Tudor Jones
Increased
$1.2M(44.66%)May 15, 2026
Paul Tudor Jones
Sold
$0(-100.00%)Aug 14, 2026
Ken Griffin
New
$9.6MAug 14, 2024
Izzy Englander
New
$41.2MMay 15, 2024

Frequently asked questions

How many institutional investors hold ALGM?: 1 tracked institutional investor disclosed a position in ALGM (ALLEGRO MICROSYSTEMS INC) in their most recent 13F filing.
Who is the largest institutional holder of ALGM?: Ken Griffin, Citadel Advisors, holds the largest disclosed position in ALGM, valued at $112M.
Did institutional ownership of ALGM increase or decrease?: Across recent 13F filings, tracked investors recorded 7 new positions, 11 increased, 8 reduced, and 6 fully exited ALGM.
Where does this ALGM ownership data come from?: SEC Form 13F-HR filings, accessed via EDGAR. 13F filings are disclosed quarterly with a 45-day reporting delay and cover U.S.-listed long equity positions only. This is not investment advice.