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

Allegro MicroSystems (ALGM) SVP logs stock sale and tax share withholding

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

Rhea-AI Filing Summary

ALLEGRO MICROSYSTEMS, INC. senior vice president and general counsel Sharon Briansky reported two transactions in the company’s common stock. On February 17, 2026, she executed an open-market sale of 9,258 shares at $41.56 per share, leaving 103,014 shares held directly afterward.

On February 13, 2026, 8,991 shares at $42.38 per share were disposed of to cover taxes due upon the vesting of previously granted restricted stock units, rather than as a discretionary sale. The filing notes that the reported sales were made under a Rule 10b5-1 trading plan adopted by the reporting person.

Positive

  • None.

Negative

  • None.
Insider Briansky Sharon
Role SVP, GC and Secretary
Sold 9,258 shs ($385K)
Type Security Shares Price Value
Sale Common Stock 9,258 $41.56 $385K
Tax Withholding Common Stock 8,991 $42.38 $381K
Holdings After Transaction: Common Stock — 103,014 shares (Direct)
Footnotes (1)
  1. Represents shares withheld to cover taxes due upon the vesting of restricted stock units that were previously granted by the Issuer. The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on August 4, 2025. Details regarding the Reporting Person's trading plan were reported in Part II, Item 5 of the Issuer's Quarterly Report on Form 10-Q for the period ending September 26, 2025, filed with the SEC on October 31, 2025.
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 NH 03103
(City) (State) (Zip)
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
3. Date of Earliest Transaction (Month/Day/Year)
02/13/2026
4. If Amendment, Date of Original Filed (Month/Day/Year)
 6. Individual or Joint/Group Filing (Check Applicable Line)
X Form filed by One Reporting Person
Form filed by More than One Reporting Person
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 02/13/2026 F 8,991(1) D $42.38 112,272 D
Common Stock 02/17/2026 S(2) 9,258 D $41.56 103,014 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. Represents shares withheld to cover taxes due upon the vesting of restricted stock units that were previously granted by the Issuer.
2. The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on August 4, 2025. Details regarding the Reporting Person's trading plan were reported in Part II, Item 5 of the Issuer's Quarterly Report on Form 10-Q for the period ending September 26, 2025, filed with the SEC on October 31, 2025.
/s/ Raymond Myer, Attorney-in-Fact for Sharon Briansky 02/18/2026
** 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.

Source: View Original Filing on SEC EDGAR

FAQ

What insider transactions did ALGM executive Sharon Briansky report on this Form 4?

She reported two transactions in Allegro MicroSystems (ALGM) common stock: an open-market sale of 9,258 shares at $41.56 on February 17, 2026, and a 8,991-share tax-withholding disposition related to vested restricted stock units on February 13, 2026.

Was the Allegro MicroSystems (ALGM) insider stock sale part of a Rule 10b5-1 plan?

Yes. The Form 4 states the sales were effected under a Rule 10b5-1 trading plan adopted by the reporting person. Such plans pre-schedule trades, helping separate personal trading decisions from the timing of material nonpublic information.

How many Allegro MicroSystems (ALGM) shares did Sharon Briansky sell in the open market?

She sold 9,258 shares of Allegro MicroSystems common stock in an open-market transaction at $41.56 per share on February 17, 2026, as reported in the Form 4 filing for this non-derivative transaction.

What is the nature of the 8,991-share disposition reported for ALGM on February 13, 2026?

The 8,991-share disposition was for tax withholding tied to the vesting of previously granted restricted stock units. Shares were withheld to satisfy tax obligations, not as a voluntary open-market sale of Allegro MicroSystems stock.

How many Allegro MicroSystems (ALGM) shares does Sharon Briansky hold after these transactions?

Following the February 17, 2026 open-market sale, the Form 4 reports that she directly owns 103,014 shares of Allegro MicroSystems common stock, reflecting her remaining position after the disclosed transactions.

What do the transaction codes S and F mean in the ALGM Form 4 filing?

Code S indicates an open-market or private sale of common stock. Code F indicates a disposition of shares to pay an exercise price or tax liability, here specifically to cover taxes upon vesting of restricted stock units.