Allegro MicroSystems (NASDAQ: ALGM) director sells 1,000 shares under trading plan

Rhea-AI Filing Summary

ALLEGRO MICROSYSTEMS, INC. (ALGM) director Jennie Raubacher reported selling 1,000 shares of Common Stock on August 17, 2026 at $45.32 per share in an open-market or private transaction. After this sale, she directly holds 13,976 shares. The sale was executed under a Rule 10b5-1 trading plan adopted on May 19, 2026.

Insider Trade Summary

Net Seller: 1,000 shares

Net Sell 1 txn

Insider Raubacher Jennie

Role Director

Sold 1,000 shs ($45K)

Type	Security	Shares	Price	Value
Sale	Common Stock F1	1,000	$45.32	$45K

Holdings After Transaction: Common Stock — 13,976 shares (Direct)

Footnotes (1)

1. F1. The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 19, 2026. Details regarding the Reporting Person's trading plan were reported in Part II, Item 5 of the Issuer's Quarterly Report on Form 10-Q for the period ending June 26, 2026, filed with the SEC on July 31, 2026.

Key Figures

Shares sold: 1,000 shares Sale price per share: $45.32 per share Shares held after transaction: 13,976 shares

3 metrics

Shares sold 1,000 shares Common Stock sold on August 17, 2026

Sale price per share $45.32 per share Price for the 1,000 ALGM shares sold

Shares held after transaction 13,976 shares Direct ownership following the August 17, 2026 sale

Key Terms

Rule 10b5-1 trading plan, Form 4, Quarterly Report on Form 10-Q

3 terms

Rule 10b5-1 trading plan regulatory

"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan"

A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.

Form 4 regulatory

"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1"

Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.

Quarterly Report on Form 10-Q regulatory

"Details regarding the Reporting Person's trading plan were reported in Part II, Item 5"

A quarterly report on Form 10-Q is a standardized financial filing public companies must submit to U.S. regulators every three months, summarizing recent financial results, cash flows, balance sheet changes, operations and material risks or legal developments. Investors treat it like a company report card that shows up-to-date facts rather than marketing copy, helping them track performance, spot trends, reassess risk and make buy or sell decisions.

FAQ

What insider transaction did ALGM director Jennie Raubacher report on this Form 4?

Jennie Raubacher reported selling 1,000 shares of Allegro MicroSystems, Inc. (ALGM) Common Stock on August 17, 2026 at $45.32 per share. The transaction is classified as a sale in an open market or private transaction.

How many ALGM shares does Jennie Raubacher hold after the reported sale?

After the reported transaction, Jennie Raubacher directly holds 13,976 shares of Allegro MicroSystems, Inc. (ALGM) Common Stock. This post-transaction holding reflects the reduction from the 1,000 shares sold on August 17, 2026.

Was the ALGM insider sale by Jennie Raubacher made under a Rule 10b5-1 plan?

Yes, the sale was effected under a Rule 10b5-1 trading plan adopted by Jennie Raubacher on May 19, 2026. The footnote explains that additional details on this trading plan were disclosed in Allegro MicroSystems’ Quarterly Report on Form 10-Q.

What was the sale price for the ALGM shares in Jennie Raubacher’s Form 4 filing?

The reported sale price for the Allegro MicroSystems, Inc. (ALGM) Common Stock was $45.32 per share. The transaction involved 1,000 shares and is described as a sale in an open market or private transaction, with the price given on a per‑share basis.

What role does Jennie Raubacher hold at Allegro MicroSystems, Inc. (ALGM)?

Jennie Raubacher is reported as a director of Allegro MicroSystems, Inc. (ALGM). In this Form 4, she is not identified as an officer or 10% owner; the filing focuses on her director status and the reported stock sale.

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 08/18/2026 - 04:16 PM Accepted by SEC EDGAR 08/18/2026 - 04:15 PM Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Raubacher Jennie

(Last) (First) (Middle)

955 PERIMETER ROAD

(Street)

MANCHESTER NEW HAMPSHIRE 03103

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
ALLEGRO MICROSYSTEMS, INC. [ ALGM ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
08/17/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	08/17/2026		S		1,000(1)	D	$45.32	13,976	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 19, 2026. Details regarding the Reporting Person's trading plan were reported in Part II, Item 5 of the Issuer's Quarterly Report on Form 10-Q for the period ending June 26, 2026, filed with the SEC on July 31, 2026.

	/s/ Raymond Myer, Attorney-in-Fact for Jennie M. Raubacher	08/18/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)