Allegro MicroSystems (ALGM) SVP sells 8,948 shares around $47.54

Rhea-AI Filing Summary

Allegro MicroSystems, Inc. senior vice president, general counsel and secretary Sharon Briansky sold 8,948 shares of common stock in an open-market transaction on May 11, 2026. The shares were sold at a weighted average price of $47.5391 per share, with individual sale prices ranging from $47.500 to $47.675. After this transaction, Briansky directly holds 75,232 shares of Allegro MicroSystems common stock.

Insider Trade Summary

Net Seller: 8,948 shares ($425,380)

Net Sell 1 txn

Insider Briansky Sharon

Role SVP, GC and Secretary

Sold 8,948 shs ($425K)

Type	Security	Shares	Price	Value
Sale	Common Stock	8,948	$47.5391	$425K

Holdings After Transaction: Common Stock — 75,232 shares (Direct, null)

Footnotes (1)

1. [object Object]

Key Figures

Shares sold: 8,948 shares Weighted average sale price: $47.5391 per share Sale price range: $47.500 to $47.675 +2 more

5 metrics

Shares sold 8,948 shares Open-market sale of common stock on May 11, 2026

Weighted average sale price $47.5391 per share Average price across multiple sale executions

Sale price range $47.500 to $47.675 Range of individual trade prices in the transaction

Shares owned after transaction 75,232 shares Direct ownership following the reported sale

Transaction code S Sale in open market or private transaction

Key Terms

weighted average price, open-market sale, Common Stock, transaction code "S"

4 terms

weighted average price financial

"The price reported in Column 4 is a weighted average price."

Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.

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""

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^*

Briansky Sharon

(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, GC and Secretary

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/11/2026

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	05/11/2026		S		8,948	D	$47.5391(1)	75,232	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 price reported in Column 4 is a weighted average price. The shares were sold at multiple prices ranging from $47.500 to $47.675. The Reporting Person undertakes to provide to Allegro MicroSystems, Inc. ("ALGM"), any security holder of ALGM, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

	/s/ Raymond Myer, Attorney-in-Fact for Sharon Briansky	05/13/2026
	** 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 did Allegro MicroSystems (ALGM) insider Sharon Briansky report in this Form 4?

Sharon Briansky reported an open-market sale of 8,948 Allegro MicroSystems common shares. The transaction occurred on May 11, 2026 at a weighted average price of $47.5391, and she retained 75,232 shares afterward.

How many Allegro MicroSystems (ALGM) shares did the insider sell and at what price?

The insider sold 8,948 common shares of Allegro MicroSystems. The weighted average sale price was $47.5391 per share, with individual trade prices ranging from $47.500 to $47.675 according to the filing footnote.

How many Allegro MicroSystems (ALGM) shares does Sharon Briansky hold after the reported sale?

After the transaction, Sharon Briansky holds 75,232 Allegro MicroSystems common shares directly. This post-transaction ownership figure comes from the Form 4 and reflects her remaining stake following the 8,948-share sale.

What type of transaction did the Allegro MicroSystems (ALGM) Form 4 disclose?

The Form 4 disclosed a non-derivative open-market sale of Allegro MicroSystems common stock. The transaction code was “S,” indicating a sale in the open market or a private transaction, with no derivative exercises reported.

Was the Allegro MicroSystems (ALGM) insider sale executed at a single price or multiple prices?

The sale was executed at multiple prices, not a single price. The filing states a weighted average price of $47.5391 per share, with individual sale prices ranging between $47.500 and $47.675 across the traded shares.