Beneficial Ownership Report · SCHEDULE 13G/A
Allegro MicroSystems, Inc.
ALGMNASDAQEQUITYCurrent
Beneficial Ownership Report
Structured filing — SCHEDULE 13G/A
primary_doc.xml
Amendment · This filing reports the amendment as submitted.
Subject company
- Company
- ALLEGRO MICROSYSTEMS, INC.
- Company CIK
- 0000866291
- Street
- 955 Perimeter Road
- City
- Manchester
- State / country code
- NH
- Postal code
- 03103
Statement details
- Amendment number
- 1
- Security class
- Common Stock, par value $0.01 per share
- Event date
- 10/30/2026
- Rule designation
- Rule 13d-1(b)
Reporting person 1
- Name
- JPMORGAN CHASE & CO.
- Citizenship / organization
- DE
- Reporting person type
- HC
- Aggregate amount owned
- 8,022,860.0
- Percent of class
- 4.3
- Sole voting power
- 7,496,819.0
- Shared voting power
- 1.0
- Sole dispositive power
- 8,022,623.0
- Shared dispositive power
- 237.0
Item 1
Issuer
ALLEGRO MICROSYSTEMS, INC.
Principal executive office address
955 Perimeter Road Manchester NH 03103
Item 2
Citizenship
DE
Filing person
JPMORGAN CHASE & CO.
Principal business or residence address
270 Park Avenue,,New York, NY 10017
Item 3
Not applicable indication
N
Type of filing person
HC
Item 4
Percent of class
4.3
Amount beneficially owned
8022860
Sole voting power
7496819
Shared voting power
1
Sole dispositive power
8022623
Shared dispositive power
237
Item 5
Not applicable indication
N
Ownership of 5% or less
Y
Item 6
Not applicable indication
N
Ownership on behalf of another person
Not Applicable
Item 7
Not applicable indication
N
Subsidiaries
J.P. Morgan Trust Company of Delaware; J.P. Morgan Securities LLC; JPMorgan Asset Management (UK) Limited; JPMorgan Chase Bank, National Association; J.P. Morgan Investment Management Inc.; J.P. Morgan Wealth Management Solutions Inc.; 55I, LLC
Item 8
Not applicable indication
N
Group members
Not Applicable
Item 9
Not applicable indication
N
Item 10
Not applicable indication
N
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 1
- Reporting person
- JPMORGAN CHASE & CO.
- Signed
- Rachel Tsvaygoft
- Title
- Vice President
- Date
- 11/05/2026
Company context
Allegro MicroSystems, Inc. is leveraging more than three decades of expertise in magnetic sensing and power ICs to propel electrification, automation, AI data center, and robotics forward with solutions that enhance efficiency, performance and sustainability. Allegro’s commitment to quality drives transformation across industries, reinforcing our status as a pioneer in “automotive-grade” technology and a partner in our customers’ success. For additional information, please visit https://www.allegromicro.com.