Allegro director Lynch sells 16,711 shares at $45.4566

ALLEGRO MICROSYSTEMS, INC. director Susan D. Lynch reported an open‑market sale of 16,711 shares of Common Stock on May 14, 2026.

Rhea-AI Filing Summary

ALLEGRO MICROSYSTEMS, INC. director Susan D. Lynch reported an open‑market sale of 16,711 shares of Common Stock on May 14, 2026. The shares were sold at a weighted average price of $45.4566, with individual trades ranging from $45.45 to $45.57. After this transaction, she directly owns 12,805 shares of Allegro MicroSystems stock.

Insider Trade Summary

Net Seller: 16,711 shares

Net Sell 1 txn

Insider Lynch Susan D

Role Director

Sold 16,711 shs ($760K)

Type	Security	Shares	Price	Value
Sale	Common Stock	16,711	$45.4566	$760K

Holdings After Transaction: Common Stock — 12,805 shares (Direct)

Footnotes (1)

1. F1. The price reported in Column 4 is a weighted average price. The shares were sold at multiple prices ranging from $45.45 to $45.57. 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.

Key Figures

Shares sold: 16,711 shares Weighted average sale price: $45.4566 per share Sale price range: $45.45–$45.57 per share +1 more

4 metrics

Shares sold 16,711 shares Common Stock sold on May 14, 2026

Weighted average sale price $45.4566 per share Average price for 16,711 shares sold

Sale price range $45.45–$45.57 per share Range of prices across multiple sale trades

Shares owned after transaction 12,805 shares Direct ownership following sale

Key Terms

open-market sale, weighted average price, Common Stock, security holder

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.

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.

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.

security holder regulatory

"any security holder of ALGM, or the staff of the SEC, upon request"

FAQ

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

What insider transaction did Allegro MicroSystems (ALGM) director Susan Lynch report?

Director Susan D. Lynch reported selling 16,711 Allegro MicroSystems Common Stock shares. The Form 4 shows an open‑market sale, giving investors transparency into her trading activity and updated direct ownership position in the company after the transaction.

When did Susan Lynch sell Allegro MicroSystems (ALGM) shares and at what price?

Susan Lynch sold her Allegro MicroSystems shares on May 14, 2026 at a weighted average price of $45.4566. A footnote explains the sale was executed through multiple trades between $45.45 and $45.57 per share.

How many Allegro MicroSystems (ALGM) shares did Susan Lynch sell in this Form 4?

Susan Lynch sold 16,711 shares of Allegro MicroSystems Common Stock. This figure comes directly from the Form 4’s transaction table, which classifies the trade as an open‑market sale of non‑derivative securities under transaction code “S.”

How many Allegro MicroSystems (ALGM) shares does Susan Lynch hold after the sale?

After the reported sale, Susan Lynch directly owns 12,805 Allegro MicroSystems shares. This post‑transaction holding figure is disclosed in the Form 4 and reflects her remaining direct equity stake following the 16,711‑share open‑market disposition.

Was Susan Lynch’s Allegro MicroSystems (ALGM) trade an open‑market sale?

Yes, the filing classifies Susan Lynch’s transaction as an open‑market sale of Common Stock. The Form 4 uses transaction code “S” and describes it as a sale in open market or private transaction, with detailed pricing provided in an accompanying footnote.

What price range is disclosed for Susan Lynch’s Allegro MicroSystems (ALGM) share sale?

The filing reports a weighted average sale price of $45.4566, with individual trades between $45.45 and $45.57. A footnote notes the shares were sold in multiple transactions and that detailed per‑trade pricing is available upon request to Allegro MicroSystems or the SEC staff.

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

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Accepted by SEC EDGAR 05/15/2026 - 04:20 PM EDT 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^*

Lynch Susan D

(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)
05/14/2026

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	05/14/2026		S		16,711	D	$45.4566(1)	12,805	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 $45.45 to $45.57. 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 Susan D. Lynch	05/15/2026
	** 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)