Allegro MicroSystems Ownership

Who are the major shareholders and have insiders been buying or selling?

Recent Insider Transactions

NasdaqGS:ALGM Recent Insider Transactions by Companies or Individuals
Date	Value	Name	Entity	Shares	Max Price
02 Mar 26	SellUS$90,930	Erin Hagen	Individual	2,598	US$35.00
22 Aug 25	SellUS$271,193	Roald Webster	Individual	8,266	US$32.81
12 Aug 25	SellUS$222,673	Richard R. Lury	Individual	7,000	US$31.81
04 Aug 25	SellUS$157,241	Erin Hagen	Individual	5,043	US$31.18
11 Jun 25	SellUS$94,395	Richard R. Lury	Individual	3,100	US$30.45
04 Jun 25	SellUS$189,036	Richard R. Lury	Individual	6,849	US$27.60

Insider Trading Volume

Insider Buying: ALGM insiders have only sold shares in the past 3 months.

Ownership Breakdown

What is the ownership structure of ALGM?
Owner Type	Number of Shares	Ownership Percentage
State or Government	130,802	0.0657%
Individual Insiders	1,336,609	0.672%
Public Companies	59,732,782	30%
Institutions	137,780,257	69.2%

Dilution of Shares: Shareholders have not been meaningfully diluted in the past year.

Top Shareholders

Top 25 shareholders own 92.13% of the company

Ownership	Name	Shares	Current Value	Change %	Portfolio %
32.2%	Sanken Electric Co., Ltd.	59,732,782	US$1.8b	0%	no data
12.7%	FMR LLC	23,596,939	US$706.7m	-14%	0.04%
7.66%	The Vanguard Group, Inc.	14,202,528	US$425.4m	-0.64%	0.01%
7.08%	Capital Research and Management Company	13,111,292	US$392.7m	-22.1%	0.02%
6.59%	BlackRock, Inc.	12,201,457	US$365.4m	7.24%	no data
3.49%	Invesco Ltd.	6,461,850	US$193.5m	42.3%	0.05%
2.89%	State Street Global Advisors, Inc.	5,359,488	US$160.5m	1.48%	0.01%
2.87%	JP Morgan Asset Management	5,309,703	US$159.0m	1.22%	0.01%
1.57%	ClearBridge Investments, LLC	2,916,785	US$87.4m	-0.55%	0.07%
1.51%	Adage Capital Management, L.P.	2,803,944	US$84.0m	77.8%	0.13%
1.38%	Citadel Advisors LLC	2,560,520	US$76.7m	672%	0.06%
1.29%	Geode Capital Management, LLC	2,393,968	US$71.7m	1.05%	no data
1.16%	Dimensional Fund Advisors LP	2,140,147	US$64.1m	8.61%	0.01%
1.1%	JPMorgan Chase & Co.	2,037,719	US$61.0m	-18%	0.01%
1.1%	Nomura Investment Management Business Trust	2,036,212	US$61.0m	-7.33%	0.08%
1.02%	Analog Century Management, LP	1,890,072	US$56.6m	60.9%	2.26%
0.94%	Principal Global Investors, LLC	1,742,296	US$52.2m	-8.98%	0.02%
0.79%	Norges Bank Investment Management	1,457,805	US$43.7m	3.54%	no data
0.74%	Charles Schwab Investment Management, Inc.	1,362,418	US$40.8m	5.21%	0.01%
0.73%	Eaton Vance Management	1,343,399	US$40.2m	-4.49%	0.01%
0.72%	Millennium Management LLC	1,341,739	US$40.2m	64.8%	0.03%
0.67%	Segall Bryant & Hamill, LLC	1,248,310	US$37.4m	-5.7%	0.5%
0.64%	Invesco Capital Management LLC	1,189,201	US$35.6m	54.2%	0.01%
0.62%	AllianceBernstein L.P.	1,148,652	US$34.4m	-57.3%	0.01%
0.6%	Point72 Asset Management, L.P.	1,119,265	US$33.5m	-19.4%	0.06%

Company Analysis and Financial Data Status

Data	Last Updated (UTC time)
Company Analysis	2026/03/22 07:16
End of Day Share Price	2026/03/20 00:00
Earnings	2025/12/26
Annual Earnings	2025/03/28

Data Sources

The data used in our company analysis is from S&P Global Market Intelligence LLC. The following data is used in our analysis model to generate this report. Data is normalised which can introduce a delay from the source being available.

Package	Data	Timeframe	Example US Source ^*
Company Financials	10 years	Income statement Cash flow statement Balance sheet	SEC Form 10-K SEC Form 10-Q
Analyst Consensus Estimates	+3 years	Forecast financials Analyst price targets	Analyst Research Reports Blue Matrix
Market Prices	30 years	Stock prices Dividends, Splits and Actions	ICE Market Data SEC Form S-1
Ownership	10 years	Top shareholders Insider trading	SEC Form 4 SEC Form 13D
Management	10 years	Leadership team Board of directors	SEC Form 10-K SEC Form DEF 14A
Key Developments	10 years	Company announcements	SEC Form 8-K

^* Example for US securities, for non-US equivalent regulatory forms and sources are used.

Unless specified all financial data is based on a yearly period but updated quarterly. This is known as Trailing Twelve Month (TTM) or Last Twelve Month (LTM) Data. Learn more.

Analysis Model and Snowflake

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Industry and Sector Metrics

Our industry and section metrics are calculated every 6 hours by Simply Wall St, details of our process are available on Github.

Analyst Sources

Allegro MicroSystems, Inc. is covered by 15 analysts. 11 of those analysts submitted the estimates of revenue or earnings used as inputs to our report. Analysts submissions are updated throughout the day.

Analyst	Institution
Thomas O'Malley	Barclays
Vivek Arya	BofA Global Research
Mark Lipacis	Evercore ISI