Allegro MicroSystems (ALGM) SVP Madormo sells 5,000 shares, holds 69,687

Rhea-AI Filing Summary

Allegro MicroSystems SVP Richard Madormo sold 5,000 shares of Common Stock in an open-market transaction at $52.72 per share. After this sale, he directly holds 69,687 Allegro MicroSystems shares, indicating a partial reduction of his position while retaining a substantial remaining stake.

Insider Trade Summary

Net Seller: 5,000 shares ($263,600)

Net Sell 1 txn

Insider Madormo Richard

Role SVP, Worldwide Sales

Sold 5,000 shs ($264K)

Type	Security	Shares	Price	Value
Sale	Common Stock	5,000	$52.72	$264K

Holdings After Transaction: Common Stock — 69,687 shares (Direct, null)

Footnotes (1)

Key Figures

Shares sold: 5,000 shares Sale price per share: $52.72 per share Shares held after transaction: 69,687 shares +1 more

4 metrics

Shares sold 5,000 shares Open-market sale of Common Stock on 2026-06-03

Sale price per share $52.72 per share Price for 5,000-share open-market sale

Shares held after transaction 69,687 shares Direct ownership following the 5,000-share sale

Net shares sold 5,000 shares Net-sell direction from transactionSummary

Key Terms

open-market sale, Common Stock, transaction code "S", net-sell

4 terms

open-market sale financial

"transaction_action: "open-market sale""

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

Common Stock financial

"security_title: "Common Stock""

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

transaction code "S" regulatory

"transaction_code: "S" indicating a sale"

net-sell financial

"netBuySellDirection: "net-sell""

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Form 4 Insider Transactions: What Each Field Means →

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^*

Madormo Richard

(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)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	SVP, Worldwide Sales

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
06/03/2026

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	06/03/2026		S		5,000	D	$52.72	69,687	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:

	/s/ Raymond Myer, Attorney-in-Fact for Richard Madormo	06/04/2026
	** 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)

FAQ

What insider transaction did ALGM executive Richard Madormo report?

Richard Madormo reported selling 5,000 shares of Allegro MicroSystems Common Stock. The transaction was an open-market sale at $52.72 per share, reflecting a modest reduction in his direct ownership while he continues to hold a sizable remaining stake.

At what price did ALGM SVP Richard Madormo sell his shares?

He sold the 5,000 Allegro MicroSystems shares at $52.72 per share. This price reflects the per-share value for the reported open-market sale and is used to calculate the total dollar value of this particular insider transaction.

How many ALGM shares does Richard Madormo hold after the reported sale?

Following the sale, Richard Madormo directly holds 69,687 Allegro MicroSystems shares. This post-transaction holding shows he retains a significant equity position in the company despite the 5,000-share open-market sale disclosed in the Form 4.

Was the ALGM insider transaction by Richard Madormo a buy or a sell?

The transaction was a sell. Richard Madormo executed an open-market sale of 5,000 Allegro MicroSystems Common Stock shares, as indicated by transaction code “S” and the transaction_direction field labeled “sell” in the reported data.

Does the ALGM Form 4 for Richard Madormo involve derivative securities?

No, the reported transaction involves only non-derivative Common Stock. The derivativeSummary section shows no derivative transactions, indicating this Form 4 solely covers a direct open-market sale of common shares, not options or other derivative exercises.