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

Allegro Microsystems grants RSUs and PSUs to CFO

D'Antilio Derek reported acquisition or exercise transactions in this Form 4 filing.

Filing Impact
(Neutral)
Filing Sentiment
(Neutral)
Form Type
4

Rhea-AI Filing Summary

D'Antilio Derek reported acquisition or exercise transactions in this Form 4 filing.

ALLEGRO MICROSYSTEMS, INC. reported that EVP, CFO & Treasurer Derek D'Antilio received two equity awards of common stock as compensation. One award is an RSU grant that will vest in three equal annual installments beginning on May 16, 2027. A second award reflects performance-vesting RSUs granted in prior years, for which the Compensation Committee certified that performance goals through March 27, 2026 were achieved, with the certified amount scheduled to vest on May 16, 2026. These are non-cash, stock-based grants rather than open-market purchases or sales.

Positive

  • None.

Negative

  • None.
Insider D'Antilio Derek
Role EVP, CFO & Treasurer
Type Security Shares Price Value
Grant/Award Common Stock 29,439 $0.00 $0.00
Grant/Award Common Stock 30,438 $0.00 $0.00
Holdings After Transaction: Common Stock — 276,653 shares (Direct)
Footnotes (2)
  1. F1. Represents an award of Restricted Stock Units ("RSUs") granted on May 13, 2026. Each RSU represents a contingent right to receive one share of common stock. The RSUs will vest in three equal annual installments beginning on May 16, 2027.
  2. F2. On May 15, 2023 and May 15, 2025, the Reporting Person was granted awards of performance-vesting restricted stock units ("PSUs"), which vest in full on May 16, 2026 in the form of common stock, contingent upon the Issuer's attainment of certain performance objectives between one and three fiscal years. On May 13, 2026, the Compensation Committee of the Issuer's Board of Directors determined that the performance objective goals of the PSUs for the period ending March 27, 2026 had been met for the aggregate number of shares shown. Following certification, the certified portion of the awards remain subject to the time-based vesting conditions, with the full amount scheduled to vest on May 16, 2026.
RSU grant size 30,438 shares Restricted Stock Units granted May 13, 2026; vests over three years from May 16, 2027
PSU certification size 29,439 shares Performance-vesting RSUs certified May 13, 2026; scheduled to vest May 16, 2026
Direct holdings after RSU grant 276,653 shares Common stock directly owned following one reported acquisition transaction
Direct holdings after PSU certification 246,215 shares Common stock directly owned following the other reported acquisition transaction
Restricted Stock Units ("RSUs") financial
"Represents an award of Restricted Stock Units ("RSUs") granted on May 13, 2026."
Restricted stock units (RSUs) are a company promise to give an employee shares of stock (or cash equivalent) in the future, but only after certain conditions—usually staying with the company for a set time or hitting performance goals—are met. Investors watch RSUs because when they vest they increase the number of shares outstanding and can lead insiders to sell shares, affecting share price, company dilution and the true cost of employee pay.
performance-vesting restricted stock units ("PSUs") financial
"the Reporting Person was granted awards of performance-vesting restricted stock units ("PSUs"), which vest in full on May 16, 2026"
Compensation Committee financial
"the Compensation Committee of the Issuer's Board of Directors determined that the performance objective goals of the PSUs had been met"
A compensation committee is a group within a company's leadership responsible for setting and reviewing how much top executives and employees are paid, including salaries, bonuses, and benefits. It matters to investors because fair and effective pay decisions can influence a company's performance, leadership motivation, and overall governance, helping ensure that the company’s management is aligned with shareholders’ interests.

FAQ

What insider transaction did Allegro Microsystems (ALGM) report for Derek D'Antilio?
Allegro Microsystems reported that EVP, CFO & Treasurer Derek D'Antilio received two awards of common stock as equity compensation, recorded as grants under code “A,” rather than any open-market purchases or sales of ALGM shares.

What are the key terms of the new RSU grant to Allegro Microsystems (ALGM) CFO?
The new award is a grant of Restricted Stock Units to the Allegro Microsystems CFO, with each RSU representing one common share. These RSUs vest in three equal annual installments starting on May 16, 2027, aligning compensation with longer-term company performance.

How do the performance-vesting RSUs (PSUs) for ALGM’s CFO vest?
Performance-vesting RSUs granted in 2023 and 2025 will vest in full on May 16, 2026. Vesting follows the Compensation Committee’s certification that Allegro Microsystems met specified performance objectives for the period ending March 27, 2026.

Did the Allegro Microsystems (ALGM) Form 4 show any open-market stock sales?
The Form 4 reports only grant or award acquisitions coded “A,” not any open-market buys or sells. Transactions consist of RSU and performance-vesting RSU awards that deliver common stock subject to time-based vesting conditions.

What role did the Compensation Committee play in the ALGM PSU award?
Allegro Microsystems’ Compensation Committee determined that performance goals for certain PSUs were met for the period ending March 27, 2026. After certification, the related shares remain subject to time-based vesting, with full vesting scheduled for May 16, 2026.

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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*
D'Antilio Derek
(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)
Director10% Owner
XOfficer (give title below)Other (specify below)
EVP, CFO & Treasurer
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
05/13/2026		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 Stock05/13/2026A29,439(1)A$0.00246,215D
Common Stock05/13/2026A30,438(2)A$0.00276,653D
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. Represents an award of Restricted Stock Units ("RSUs") granted on May 13, 2026. Each RSU represents a contingent right to receive one share of common stock. The RSUs will vest in three equal annual installments beginning on May 16, 2027.
2. On May 15, 2023 and May 15, 2025, the Reporting Person was granted awards of performance-vesting restricted stock units ("PSUs"), which vest in full on May 16, 2026 in the form of common stock, contingent upon the Issuer's attainment of certain performance objectives between one and three fiscal years. On May 13, 2026, the Compensation Committee of the Issuer's Board of Directors determined that the performance objective goals of the PSUs for the period ending March 27, 2026 had been met for the aggregate number of shares shown. Following certification, the certified portion of the awards remain subject to the time-based vesting conditions, with the full amount scheduled to vest on May 16, 2026.
/s/ Raymond Myer, Attorney-in-Fact for Derek P. D'Antilio05/15/2026
** 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