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  4. [Form 4] ALLEGRO MICROSYSTEMS, INC. Insider Trading Activity

Allegro (ALGM) CEO’s trust sells 30,089 shares at $47.2349

Filing Impact
(Very High)
Filing Sentiment
(Negative)
Form Type
4

Rhea-AI Filing Summary

ALLEGRO MICROSYSTEMS, INC. President and CEO Michael Doogue reported an indirect open-market sale of 30,089 shares of common stock on May 11, 2026 through the Michael C. Doogue Revocable Trust of 2015 at a weighted average price of $47.2349 per share.

Following the transactions, he holds 178,749 shares directly and 252,797 shares indirectly through the trust. A footnote explains that 36,800 shares were previously moved from direct to indirect ownership via the trust, reflecting a change in form of ownership rather than an additional market sale.

Positive

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Insights

CEO-related trust sells 30,089 shares, but sizable holdings remain.

Director and CEO Michael Doogue, via the Michael C. Doogue Revocable Trust of 2015, executed an open-market sale of 30,089 common shares at a weighted average price of $47.2349 on May 11, 2026. The price reflects trades between $47.20 and $47.44.

After this sale, reported holdings total 178,749 shares directly and 252,797 shares indirectly. Relative to this combined position, the sale looks routine in scale. A separate transfer of 36,800 shares from direct to the trust reflects a change in ownership form, not an additional sale.

Insider Doogue Michael
Role President and CEO
Sold 30,089 shs ($1.42M)
Type Security Shares Price Value
Sale Common Stock 30,089 $47.2349 $1.42M
holding Common Stock -- -- --
Holdings After Transaction: Common Stock — 252,797 shares (Indirect, By the Michael C. Doogue Revocable Trust of 2015); Common Stock — 178,749 shares (Direct, null)
Footnotes (1)
  1. The price reported in Column 4 is a weighted average price. The shares were sold at multiple prices ranging from $47.20 to $47.44. 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. The number of shares beneficially owned reflects a change in the form of beneficial ownership from direct to indirect of 36,800 shares that were transferred from the Reporting Person's direct holdings to the Michael C. Doogue Revocable Trust of 2015 on May 20, 2025.
Shares sold 30,089 shares Open-market sale on May 11, 2026
Weighted average sale price $47.2349 per share Open-market sale on May 11, 2026
Sale price range $47.20–$47.44 per share Range of individual sale prices in transaction
Direct holdings after transaction 178,749 shares Common stock held directly after reported transactions
Indirect holdings after transaction 252,797 shares Common stock held via revocable trust after sale
Shares transferred to trust 36,800 shares Change from direct to indirect ownership on May 20, 2025
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.
beneficially owned financial
"The number of shares beneficially owned reflects a change in the form of beneficial ownership"
Beneficially owned describes securities or assets where a person has the economic rights and control—such as the right to receive dividends and to direct voting—even if legal title is held in another name. Think of it like having the keys and using a car that’s registered to someone else: you get the benefits and make decisions. Investors care because beneficial ownership reveals who truly controls value and voting power, affecting corporate decisions and takeover dynamics.
indirect financial
"ownership_type": "indirect""
Revocable Trust financial
"By the Michael C. Doogue Revocable Trust of 2015"
A revocable trust is a legal arrangement where the person who creates it keeps control and can change or cancel the trust at any time, while naming who will manage and receive the assets later. Think of it like a flexible folder for your investments and property that can be relabeled or reworked as circumstances change; it matters to investors because it determines how ownership is recorded, how easily assets transfer on incapacity or death, and whether holdings bypass public probate proceedings.
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Form 4 Insider Transactions: What Each Field Means →
SEC Form 4
FORM 4UNITED 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*
Doogue Michael
(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)
XDirector10% Owner
XOfficer (give title below)Other (specify below)
President and CEO
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
05/11/2026		6. Individual or Joint/Group Filing (Check Applicable Line)
XForm 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)
CodeVAmount(A) or (D)Price
Common Stock05/11/2026S30,089D$47.2349(1)252,797(2)IBy the Michael C. Doogue Revocable Trust of 2015
Common Stock178,749(2)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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount 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 $47.20 to $47.44. 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.
2. The number of shares beneficially owned reflects a change in the form of beneficial ownership from direct to indirect of 36,800 shares that were transferred from the Reporting Person's direct holdings to the Michael C. Doogue Revocable Trust of 2015 on May 20, 2025.
/s/ Raymond Myer, Attorney-in-Fact for Michael C. Doogue05/13/2026
** Signature of Reporting PersonDate
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)

Source: View Original Filing on SEC EDGAR

FAQ

What insider transaction did ALGM CEO Michael Doogue report on this Form 4?

Michael Doogue, President and CEO of Allegro MicroSystems, reported an indirect open-market sale of 30,089 common shares. The sale was executed through the Michael C. Doogue Revocable Trust of 2015 on May 11, 2026, at a weighted average price of $47.2349 per share.

How many Allegro MicroSystems (ALGM) shares does Michael Doogue hold after the reported sale?

After the reported transactions, Michael Doogue holds 178,749 ALGM shares directly and 252,797 shares indirectly. The indirect holdings are through the Michael C. Doogue Revocable Trust of 2015, showing he retains a substantial equity position following the 30,089-share open-market sale.

Was there a change between direct and indirect ownership for ALGM shares?

Yes. The filing notes that 36,800 shares previously held directly by Michael Doogue were transferred to the Michael C. Doogue Revocable Trust of 2015. This adjustment changes the form of beneficial ownership from direct to indirect rather than reflecting an additional market purchase or sale.

How significant is the 30,089-share sale relative to ALGM CEO Michael Doogue’s holdings?

The sale of 30,089 shares is small compared with Michael Doogue’s total reported holdings. He continues to own 178,749 shares directly and 252,797 indirectly through his revocable trust, indicating the transaction represents only a modest portion of his overall Allegro MicroSystems position.

What does the weighted average price disclosure mean in the ALGM Form 4?

The Form 4 states the reported price of $47.2349 is a weighted average. Shares were sold in multiple trades between $47.20 and $47.44, and the insider undertakes to provide detailed breakdowns of quantities and prices upon request to the company, its security holders, or SEC staff.