JPMorgan reports 6.8% stake in Allegro MicroSystems

JPMorgan Chase & Co. has reported a significant ownership position in Allegro MicroSystems, Inc. common stock.

Rhea-AI Filing Summary

JPMorgan Chase & Co. has reported a significant ownership position in Allegro MicroSystems, Inc. common stock. The firm is deemed to beneficially own 12,729,473 shares of Allegro’s common stock, representing 6.8% of the outstanding class.

Within this position, JPMorgan Chase & Co. has sole voting powershared voting powersole dispositive powershared dispositive power

Key Figures

Beneficially owned shares: 12,729,473 shares Percent of class: 6.8% Sole voting power: 12,199,576 shares +3 more

6 metrics

Beneficially owned shares 12,729,473 shares Amount beneficially owned in Allegro MicroSystems common stock

Percent of class 6.8% Portion of Allegro MicroSystems common stock class held

Sole voting power 12,199,576 shares Shares for which JPMorgan can solely vote or direct the vote

Shared voting power 142 shares Shares for which JPMorgan shares voting authority

Sole dispositive power 12,722,671 shares Shares for which JPMorgan can solely direct disposition

Shared dispositive power 6,229 shares Shares for which JPMorgan shares dispositive authority

Key Terms

beneficially owned, Sole Voting Power, Shared Dispositive Power, parent holding company, +1 more

5 terms

beneficially owned regulatory

"Item 4. | Ownership (a) | Amount beneficially owned: 12,729,473"

Beneficially owned describes securities or assets where a person has the economic rights and control—such as the right to receive dividends and to direct voting—even if legal title is held in another name. Think of it like having the keys and using a car that’s registered to someone else: you get the benefits and make decisions. Investors care because beneficial ownership reveals who truly controls value and voting power, affecting corporate decisions and takeover dynamics.

Sole Voting Power regulatory

"5 | Sole Voting Power 12,199,576.00"

Sole voting power is the exclusive right to cast votes attached to a shareholder’s stock without needing approval from anyone else. Like holding the only remote control for a TV, it lets that holder decide corporate matters such as board members, mergers, and policy changes, making it important to investors because it concentrates control and can strongly influence a company’s strategy and the value of its shares.

Shared Dispositive Power regulatory

"8 | Shared Dispositive Power 6,229.00"

parent holding company regulatory

"If a parent holding company has filed this schedule, pursuant to (ii)(G)"

subsidiary regulatory

"Identification and Classification of the Subsidiary Which Acquired the Security"

A subsidiary is a company that is controlled or owned by a larger company, known as the parent company. Think of it like a branch or division of a bigger organization; it operates separately but is ultimately guided by the parent. For investors, understanding subsidiaries helps clarify how a larger company is structured and where its resources and risks are concentrated.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What stake does JPMorgan Chase & Co. report in Allegro MicroSystems (ALGM)?

JPMorgan Chase & Co. reports beneficial ownership of 12,729,473 shares of Allegro MicroSystems common stock, representing 6.8% of the class according to the Schedule 13G filing.

How many Allegro MicroSystems (ALGM) shares can JPMorgan vote?

JPMorgan Chase & Co. has sole voting power over 12,199,576 shares of Allegro MicroSystems and shared voting power over 142 shares, as disclosed in the beneficial ownership breakdown.

What dispositive power does JPMorgan have over its ALGM shares?

JPMorgan Chase & Co. holds sole dispositive power over 12,722,671 shares of Allegro MicroSystems and shared dispositive power over 6,229 shares, indicating control over how these shares may be disposed.

Which JPMorgan entities are involved in holding Allegro MicroSystems (ALGM) shares?

Affiliated entities include J.P. Morgan Trust Company of Delaware, J.P. Morgan Securities LLC, JPMorgan Chase Bank, National Association, and several JPMorgan asset management subsidiaries in the U.S., Europe, and Asia.

What class of Allegro MicroSystems (ALGM) securities is covered by this filing?

The filing covers Common Stock, par value $0.01 per share of Allegro MicroSystems, Inc., identified by CUSIP 01749D105, which is the class referenced in the Schedule 13G.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 07/16/2026 - 02:26 PM EDT Learn about SEC filing dates

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

ALLEGRO MICROSYSTEMS, INC.

(Name of Issuer)

Common Stock, par value $0.01 per share

(Title of Class of Securities)

01749D105

(CUSIP Number)

06/30/2026

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

schemaVersion:

SCHEDULE 13G

CUSIP Number(s): 01749D105

1

Names of Reporting Persons

JPMORGAN CHASE & CO

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 12,199,576.00
6	Shared Voting Power 142.00
7	Sole Dispositive Power 12,722,671.00
8	Shared Dispositive Power 6,229.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

12,729,473.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

6.8 %

12

Type of Reporting Person (See Instructions)

HC

SCHEDULE 13G

Item 1.
(a)	Name of issuer: ALLEGRO MICROSYSTEMS, INC.
(b)	Address of issuer's principal executive offices: 955 PERIMETER ROAD, MANCHESTER, NEW HAMPSHIRE, 03103.
Item 2.
(a)	Name of person filing: JPMORGAN CHASE & CO.
(b)	Address or principal business office or, if none, residence: 270 Park Avenue, New York, NY 10017
(c)	Citizenship: DE
(d)	Title of class of securities: Common Stock, par value $0.01 per share
(e)	CUSIP Number(s): 01749D105
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: 12,729,473
(b)	Percent of class: 6.8 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 12,199,576
	(ii) Shared power to vote or to direct the vote: 142
	(iii) Sole power to dispose or to direct the disposition of: 12,722,671
	(iv) Shared power to dispose or to direct the disposition of: 6,229
Item 5.	Ownership of 5 Percent or Less of a Class.
	Not Applicable
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	Not Applicable
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	If a parent holding company has filed this schedule, pursuant to Rule 13d-1(b)(ii)(G), so indicate under Item 3(g) and attach an exhibit stating the identity and the Item 3 classification of the relevant subsidiary. If a parent holding company has filed this schedule pursuant to Rule 13d-1(c) or Rule 13d-1(d), attach an exhibit stating the identification of the relevant subsidiary. J.P. Morgan Trust Company of Delaware; J.P. Morgan Securities LLC; JPMorgan Chase Bank, National Association; JPMorgan Asset Management (UK) Limited; J.P. MORGAN SE; J.P. Morgan Investment Management Inc.; JPMorgan Asset Management (Taiwan) Limited; JPMorgan Asset Management (China) Company Limited; J.P. Morgan Wealth Management Solutions Inc.
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under § 240.14a-11.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

JPMORGAN CHASE & CO

Signature:	Rachel Tsvaygoft
Name/Title:	Vice President
Date:	07/16/2026