ALGM Insider Trading

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Insider Trading History
Frequently Asked Questions
About

Insider Ownership Percentage: 0.40%

Insider Buying (Last 12 Months): $0.00

Insider Selling (Last 12 Months): $271,207.46

Allegro MicroSystems Insider Trading History Chart

Allegro MicroSystems Share Price & Price History

^$28.82

▼ -0.08 (-0.28%)

As of 12/4/2025 05:00 PM ET

Days: 30 | 90 | 365

Allegro MicroSystems Insider Trading History

Transaction Date	Insider Name	Title	Buy/Sell	Number of Shares	Average Share Price	Total Transaction	Shares Held After Transaction
8/22/2025	Roald Graham Webster	CAO	Sell	8,266	$32.81	$271,207.46	17,300
11/18/2024	Michael Doogue	SVP	Buy	15,000	$19.00	$285,000.00	246,086
8/7/2024	Electric Co. Ltd. Sanken	Major Shareholder	Sell	10,017,315	$23.16	$232,001,015.40	59,732,782
7/29/2024	Electric Co. Ltd. Sanken	Major Shareholder	Sell	28,750,000	$23.16	$665,850,000.00	69,750,097
5/30/2024	Richard R Lury	Director	Sell	8,500	$30.00	$255,000.00	23,001
11/17/2023	Vineet A. Nargolwala	CEO	Buy	1,000	$27.84	$27,840.00	302,161
9/15/2023	Derek D'Antilio	CFO	Buy	1,488	$33.63	$50,041.44	142,899
8/23/2023	Joseph R. Martin	Director	Sell	17,000	$38.73	$658,410.00	22,374
2/8/2023	Richard R Lury	Director	Sell	6,000	$42.58	$255,480.00	27,663
2/3/2023	Susan D. Lynch	Director	Buy	240	$41.53	$9,967.20	12,523
2/2/2023	Max R. Glover	SVP	Sell	40,000	$40.13	$1,605,200.00	194,689
2/2/2023	Skna L.P. Oep	Major Shareholder	Sell	4,980,000	$37.76	$188,044,800.00	17,649,247
1/17/2023	Max R. Glover	SVP	Sell	25,000	$34.21	$855,250.00	234,689
1/11/2023	Max R. Glover	SVP	Sell	15,000	$32.06	$480,900.00	259,689
1/6/2023	Joanne Valente	SVP	Sell	1,377	$30.00	$41,310.00	95,776
1/4/2023	Joanne Valente	SVP	Sell	1,123	$30.07	$33,768.61	97,153

SEC Filings (Institutional Ownership Changes) for Allegro MicroSystems (NASDAQ:ALGM)

56.45% of Allegro MicroSystems stock is owned by institutions. Institutional ownership can be a sign of analyst confidence in the fundamentals of the stock.

Institutional Buying and Selling by Quarter

Allegro MicroSystems Institutional Trading History

Reporting Date	Hedge Fund	Shares Held	Market Value	% of Portfolio	Quarterly Change in Shares	Ownership in Company
12/1/2025	Polar Asset Management Partners Inc.	8,978	$0.26M	0.0%	N/A	0.005%
11/20/2025	Centaurus Financial Inc.	5,516	$0.16M	0.0%	N/A	0.003%
11/17/2025	NewEdge Advisors LLC	2,483	$73K	0.0%	+12,315.0%	0.001%
11/17/2025	Castleark Management LLC	133,508	$3.90M	0.1%	+29.4%	0.072%
11/17/2025	XTX Topco Ltd	50,358	$1.47M	0.1%	+432.8%	0.027%
11/17/2025	Voleon Capital Management LP	14,099	$0.41M	0.0%	N/A	0.008%
11/17/2025	Verition Fund Management LLC	29,024	$0.85M	0.0%	-50.6%	0.016%
11/17/2025	Sherbrooke Park Advisers LLC	22,778	$0.67M	0.3%	N/A	0.012%
11/17/2025	Quantessence Capital LLC	19,463	$0.57M	0.2%	N/A	0.011%
11/17/2025	Quarry LP	975	$28K	0.0%	-34.9%	0.001%
11/17/2025	Prelude Capital Management LLC	22,728	$0.66M	0.1%	N/A	0.012%
11/17/2025	Paloma Partners Management Co	75,000	$2.19M	0.4%	N/A	0.041%
11/17/2025	Mercer Global Advisors Inc. ADV	8,525	$0.25M	0.0%	N/A	0.005%
11/17/2025	MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.	90,592	$2.65M	0.0%	-39.2%	0.049%
11/17/2025	Jain Global LLC	89,935	$2.63M	0.0%	+9.9%	0.049%
11/17/2025	Gotham Asset Management LLC	124,488	$3.64M	0.0%	+1,390.9%	0.067%
11/17/2025	Brevan Howard Capital Management LP	11,822	$0.35M	0.0%	N/A	0.006%
11/17/2025	Bank of America Corp DE	952,679	$27.82M	0.0%	-136.6%	0.515%
11/17/2025	ArrowMark Colorado Holdings LLC	149,649	$4.37M	0.1%	-34.2%	0.081%
11/17/2025	Alliancebernstein L.P.	2,690,496	$78.56M	0.0%	-2.5%	1.453%
11/17/2025	Ameriprise Financial Inc.	326,922	$9.55M	0.0%	-21.6%	0.177%
11/14/2025	Schonfeld Strategic Advisors LLC	80,465	$2.35M	0.0%	-81.5%	0.043%
11/14/2025	Creative Planning	22,677	$0.66M	0.0%	+22.0%	0.012%
11/14/2025	Lazard Asset Management LLC	31,652	$0.92M	0.0%	-82.2%	0.017%
11/14/2025	Polar Asset Management Partners Inc.	8,978	$0.26M	0.0%	N/A	0.005%
11/14/2025	Raymond James Financial Inc.	926,358	$27.05M	0.0%	-26.2%	0.500%
11/14/2025	Virtu Financial LLC	10,393	$0.30M	0.0%	N/A	0.006%
11/14/2025	Man Group plc	215,287	$6.29M	0.0%	N/A	0.116%
11/14/2025	Occudo Quantitative Strategies LP	53,934	$1.58M	0.2%	+173.0%	0.029%
11/14/2025	Balyasny Asset Management L.P.	498,331	$14.55M	0.0%	-66.1%	0.269%
11/14/2025	Brooklyn Investment Group	7,335	$0.21M	0.0%	+321.6%	0.004%
11/14/2025	UBS AM A Distinct Business Unit of UBS Asset Management Americas LLC	337,478	$9.85M	0.0%	-30.2%	0.182%
11/14/2025	Two Sigma Investments LP	161,348	$4.71M	0.0%	-53.5%	0.087%
11/14/2025	Vident Advisory LLC	14,269	$0.42M	0.0%	+20.7%	0.008%
11/14/2025	Squarepoint Ops LLC	339,926	$9.93M	0.0%	+5,863.6%	0.184%
11/14/2025	Analog Century Management LP	1,174,953	$34.31M	1.8%	-14.3%	0.635%
11/14/2025	Wellington Management Group LLP	1,160,917	$33.90M	0.0%	-56.0%	0.627%
11/14/2025	Comerica Bank	31,947	$0.93M	0.0%	-59.6%	0.017%
11/13/2025	Kennedy Capital Management LLC	56,613	$1.65M	0.0%	-22.9%	0.031%
11/13/2025	Pier Capital LLC	235,118	$6.87M	1.1%	-10.3%	0.127%
11/13/2025	Invesco Ltd.	5,312,427	$155.12M	0.0%	-15.1%	2.870%
11/13/2025	Sei Investments Co.	88,128	$2.57M	0.0%	+2.1%	0.048%
11/13/2025	BNP Paribas Financial Markets	144,571	$4.22M	0.0%	+672.4%	0.078%
11/13/2025	Mackenzie Financial Corp	9,685	$0.28M	0.0%	N/A	0.005%
11/13/2025	Magnetar Financial LLC	31,907	$0.93M	0.0%	N/A	0.017%
11/13/2025	Van ECK Associates Corp	60,707	$1.77M	0.0%	+103.6%	0.033%
11/13/2025	Capital Research Global Investors	16,824,722	$491.28M	0.1%	+5.8%	9.089%
11/13/2025	Legal & General Group Plc	196,977	$5.75M	0.0%	-2.7%	0.106%
11/13/2025	Swiss National Bank	250,900	$7.33M	0.0%	+1.9%	0.136%
11/13/2025	Russell Investments Group Ltd.	14,496	$0.42M	0.0%	+24.5%	0.008%
11/13/2025	Schroder Investment Management Group	75,401	$2.20M	0.0%	N/A	0.041%
11/13/2025	Inceptionr LLC	9,882	$0.29M	0.1%	N/A	0.005%
11/13/2025	Natixis Advisors LLC	41,687	$1.22M	0.0%	-2.4%	0.023%
11/13/2025	First Trust Advisors LP	551,593	$16.11M	0.0%	-4.3%	0.298%
11/12/2025	Barclays PLC	151,025	$4.41M	0.0%	+28.2%	0.082%
11/12/2025	GW&K Investment Management LLC	683,505	$19.96M	0.2%	-3.0%	0.369%
11/12/2025	Dimensional Fund Advisors LP	1,970,550	$57.54M	0.0%	-6.5%	1.064%
11/12/2025	Victory Capital Management Inc.	18,692	$0.55M	0.0%	-16.7%	0.010%
11/12/2025	Segall Bryant & Hamill LLC	1,323,726	$38.65M	0.5%	-0.3%	0.715%
11/12/2025	Royce & Associates LP	102,230	$2.99M	0.0%	N/A	0.055%
11/12/2025	Quantbot Technologies LP	71,708	$2.09M	0.1%	+317.4%	0.039%
11/12/2025	Handelsbanken Fonder AB	40,000	$1.17M	0.0%	+17.6%	0.022%
11/12/2025	Xponance Inc.	15,014	$0.44M	0.0%	-12.6%	0.008%
11/12/2025	Mitsubishi UFJ Asset Management Co. Ltd.	105,967	$3.09M	0.0%	-9.4%	0.057%
11/12/2025	Fox Run Management L.L.C.	47,590	$1.39M	0.2%	N/A	0.026%
11/10/2025	AXQ Capital LP	38,656	$1.13M	0.4%	N/A	0.021%
11/10/2025	Ameritas Investment Partners Inc.	23,240	$0.68M	0.0%	-8.4%	0.013%
11/10/2025	Semanteon Capital Management LP	8,504	$0.25M	0.3%	N/A	0.005%
11/7/2025	Vanguard Group Inc.	14,293,465	$417.37M	0.0%	+0.6%	7.721%
11/7/2025	Northwestern Mutual Investment Management Company LLC	27,634	$0.81M	0.0%	-5.3%	0.015%
11/7/2025	JPMorgan Chase & Co.	7,731,267	$225.75M	0.0%	-3.5%	4.176%
11/7/2025	State of New Jersey Common Pension Fund D	68,882	$2.01M	0.0%	-5.2%	0.037%
11/7/2025	PNC Financial Services Group Inc.	14,713	$0.43M	0.0%	+2.7%	0.008%
11/6/2025	Rhumbline Advisers	312,924	$9.14M	0.0%	-5.1%	0.169%
11/6/2025	Advisors Asset Management Inc.	22,499	$0.66M	0.0%	+2.1%	0.012%
11/6/2025	ProShare Advisors LLC	16,704	$0.49M	0.0%	-21.8%	0.009%
11/6/2025	Candriam S.C.A.	89,175	$2.60M	0.0%	N/A	0.048%
11/5/2025	Alps Advisors Inc.	28,983	$0.85M	0.0%	+3.0%	0.016%
11/5/2025	State of Michigan Retirement System	29,500	$0.86M	0.0%	-6.1%	0.016%
11/5/2025	Envestnet Asset Management Inc.	37,383	$1.09M	0.0%	-29.0%	0.020%
11/5/2025	Hantz Financial Services Inc.	901	$26K	0.0%	+86.9%	0.000%
11/4/2025	State of Wyoming	16,009	$0.47M	0.1%	+422.1%	0.009%
11/4/2025	Principal Financial Group Inc.	1,914,074	$55.89M	0.0%	-11.3%	1.034%
11/4/2025	Thrivent Financial for Lutherans	28,483	$0.83M	0.0%	-7.5%	0.015%
11/4/2025	Keybank National Association OH	14,418	$0.42M	0.0%	-25.7%	0.008%
11/4/2025	Lisanti Capital Growth LLC	27,940	$0.82M	0.2%	-74.6%	0.015%
11/3/2025	AlphaQuest LLC	5,074	$0.15M	0.0%	-34.6%	0.003%
11/3/2025	Arizona State Retirement System	38,293	$1.12M	0.0%	+1.8%	0.021%
11/3/2025	New York State Common Retirement Fund	50,938	$1.49M	0.0%	-5.9%	0.028%
11/3/2025	TD Waterhouse Canada Inc.	2,459	$70K	0.0%	-19.1%	0.001%
11/3/2025	Mirae Asset Global Investments Co. Ltd.	12,392	$0.36M	0.0%	-53.9%	0.007%
11/3/2025	Federated Hermes Inc.	11,075	$0.32M	0.0%	-9.3%	0.006%
10/31/2025	Vanguard Personalized Indexing Management LLC	13,849	$0.40M	0.0%	-2.6%	0.007%
10/31/2025	Mutual of America Capital Management LLC	57,256	$1.67M	0.0%	-11.9%	0.031%
10/31/2025	Retirement Systems of Alabama	190,895	$5.57M	0.0%	-4.9%	0.103%
10/31/2025	Y Intercept Hong Kong Ltd	20,222	$0.59M	0.0%	N/A	0.011%
10/30/2025	Teacher Retirement System of Texas	24,106	$0.70M	0.0%	+23.2%	0.013%
10/30/2025	Strs Ohio	2,943	$86K	0.0%	-89.9%	0.002%
10/30/2025	Universal Beteiligungs und Servicegesellschaft mbH	11,504	$0.34M	0.0%	-19.8%	0.006%
10/29/2025	Amalgamated Bank	56,767	$1.66M	0.0%	-4.2%	0.031%

Data available starting January 2016

Allegro MicroSystems, Inc., together with its subsidiaries, designs, develops, manufactures, and markets sensor integrated circuits (ICs) and application-specific analog power ICs for motion control and energy-efficient systems. Its products include magnetic sensor ICs, such as position, speed, and current sensor ICs; and power ICs comprising motor driver ICs, regulator and LED driver ICs, and isolated gate drivers. The company sells its products to original equipment manufacturers and distributors primarily in the automotive and industrial markets through its direct sales force, third party distributors, independent sales representatives, and consignment. It operates in the United States, rest of the Americas, Europe, Japan, Greater China, South Korea, and other Asian markets. The company was founded in 1990 and is headquartered in Manchester, New Hampshire. Allegro MicroSystems, Inc. is a subsidiary of Sanken Electric Co., Ltd.

Today's Range

Now: $28.82

$28.27

$28.94

50 Day Range

MA: $27.68

$22.80

$31.05

52 Week Range

Now: $28.82

$16.38

$38.45

Volume

1,602,529 shs

Average Volume

1,569,016 shs

Market Capitalization

$5.34 billion

P/E Ratio

N/A

Dividend Yield

N/A

Beta

1.62

Who are the company insiders with the largest holdings of Allegro MicroSystems?: Allegro MicroSystems' top insider investors include:
Electric Co Ltd Sanken (Major Shareholder)
Michael Doogue (SVP)
Richard R Lury (Director)
Roald Graham Webster (CAO)
Learn More about top insider investors at Allegro MicroSystems.
Who are the major institutional investors of Allegro MicroSystems?: Allegro MicroSystems' top institutional investors include:
Capital Research Global Investors — 9.09%
Vanguard Group Inc. — 7.72%
JPMorgan Chase & Co. — 4.18%
Invesco Ltd. — 2.87%
Alliancebernstein L.P. — 1.45%
Dimensional Fund Advisors LP — 1.06%
Learn More about top institutional investors of Allegro MicroSystems stock.
Which major investors are selling Allegro MicroSystems stock?: During the last quarter, ALGM stock was sold by these institutional investors:
Wellington Management Group LLP
Balyasny Asset Management L.P.
Invesco Ltd.
Schonfeld Strategic Advisors LLC
Raymond James Financial Inc.
JPMorgan Chase & Co.
Principal Financial Group Inc.
Analog Century Management LP
Which major investors are buying Allegro MicroSystems stock?: During the previous quarter, ALGM stock was bought by institutional investors including:
Bank of America Corp DE
Capital Research Global Investors
Susquehanna International Group LLP
Caption Management LLC
Squarepoint Ops LLC
Parallax Volatility Advisers L.P.
Voya Investment Management LLC
Man Group plc