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

Allegro MicroSystems (ALGM) SVP granted 18,463 stock-based compensation shares

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

Rhea-AI Filing Summary

ALLEGRO MICROSYSTEMS, INC. executive Sharon Briansky reported stock-based compensation awards rather than open-market trades. On May 13, 2026, she received 2,611 shares of common stock in the form of Restricted Stock Units that will vest in three equal annual installments beginning on May 16, 2027. She also acquired 15,852 shares tied to performance-vesting restricted stock units granted on May 15, 2023, after the Compensation Committee certified that performance goals for the period ending March 27, 2026 had been met, with these shares scheduled to vest on May 16, 2026. Following these awards, she directly holds 93,695 shares of common stock.

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Insider Briansky Sharon
Role SVP, GC and Secretary
Type Security Shares Price Value
Grant/Award Common Stock 15,852 $0.00 --
Grant/Award Common Stock 2,611 $0.00 --
Holdings After Transaction: Common Stock — 91,084 shares (Direct)
Footnotes (1)
  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. On May 15, 2023, the Reporting Person was granted an award 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 award remains subject to the time-based vesting conditions, with the full amount scheduled to vest on May 16, 2026.
RSU award 2,611 shares Restricted Stock Units granted May 13, 2026
RSU vesting schedule 3 equal annual installments Beginning May 16, 2027
Performance-vesting shares 15,852 shares PSUs granted May 15, 2023, certified May 13, 2026
Performance period end date March 27, 2026 PSU performance measurement period
PSU vesting date May 16, 2026 Full vesting of certified PSUs
Shares held after awards 93,695 shares Direct common stock holdings following reported transactions
Transaction price per share $0.00 Equity awards granted at no cash cost to insider
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
"On May 15, 2023, the Reporting Person was granted an award of performance-vesting restricted stock units ("PSUs")."
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.
time-based vesting conditions financial
"the certified portion of the award remains subject to the time-based vesting conditions"
contingent right financial
"Each RSU represents a contingent right to receive one share of common stock."

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Form 4 Insider Transactions: What Each Field Means →

FAQ

What insider transactions did ALGM executive Sharon Briansky report?
Sharon Briansky reported two stock-based compensation acquisitions, not market trades. She received 2,611 Restricted Stock Units and 15,852 performance-vesting restricted stock units that convert into common shares upon vesting, increasing her direct holdings in Allegro MicroSystems.

How many Allegro MicroSystems (ALGM) shares did Sharon Briansky acquire?
She acquired a total of 18,463 common shares through awards. This includes 2,611 Restricted Stock Units and 15,852 shares from performance-vesting restricted stock units, all granted with a zero dollar per-share transaction price as equity compensation.

When do Sharon Briansky’s new ALGM RSU awards vest?
The 2,611 Restricted Stock Units granted on May 13, 2026 vest in three equal annual installments. Vesting begins on May 16, 2027, meaning the award is spread over three years as long as the standard vesting conditions are satisfied.

What performance conditions applied to Sharon Briansky’s ALGM PSUs?
The 15,852 performance-vesting restricted stock units were granted on May 15, 2023 and tied to objectives measured over one to three fiscal years. The Compensation Committee certified goals for the period ending March 27, 2026 were met, triggering full vesting scheduled on May 16, 2026.

How many Allegro MicroSystems shares does Sharon Briansky hold after these awards?
After the reported transactions, she directly holds 93,695 shares of ALLEGRO MICROSYSTEMS common stock. This figure reflects her updated ownership following the grant and certification of the stock-based compensation awards disclosed in the Form 4 filing.

Did Sharon Briansky buy or sell ALGM shares on the open market?
The transactions were classified as grant or award acquisitions with a zero dollar price per share. They represent Restricted Stock Units and performance-vesting restricted stock units, rather than open-market purchases or sales of Allegro MicroSystems common stock.
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*
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)
Director10% Owner
XOfficer (give title below)Other (specify below)
SVP, GC and Secretary
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 Stock05/13/2026A15,852(1)A$0.0091,084D
Common Stock05/13/2026A2,611(2)A$0.0093,695D
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, the Reporting Person was granted an award 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 award remains 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 Sharon Briansky05/15/2026
** 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