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.SeeInstruction 1(b).

1.Name and Address of Reporting Person* Doogue Michael (Last) (First) (Middle) 955 PERIMETER ROAD (街) MANCHESTER NH 03103 (City) (State) (Zip)	2. Issuer NameandTicker or Trading Symbol ALLEGRO MICROSYSTEMS, INC.[ALGM]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) Director 10% Owner X 官(给下面的标题) Other (specify below) SVP of Technology and Products
	3. Date of Earliest Transaction (Month/Day/Year) 11/02/2020
	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	10/28/2020		C		715,174	A	(1)	715,174	I	By The Michael C. Doogue Revocable Trust of 2015
Common Stock	10/28/2020		D		109,648	D	$13.195	605,526	I	By The Michael C. Doogue Revocable Trust of 2015
Common Stock	11/02/2020		A		23,572(2)	A	$0.00	23,572	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
Class A Common Stock	(1)	10/28/2020		C			23,000	(1)	(1)	Common Stock	(1)	$0.00	0	I	By The Michael C. Doogue Revocable Trust of 2015
Class L Common Stock	(1)	10/28/2020		C			27,000	(1)	(1)	Common Stock	(1)	$0.00	0	I	By The Michael C. Doogue Revocable Trust of 2015

Explanation of Responses:

1.的pricing of the Issuer's initial public offering on October 28, 2020, the Class A and Class L common stock held by the reporting person were automatically converted into and reclassified as an aggregate of 715,174 shares of common stock of the Issuer.

2. Represents an award of Restricted Stock Units ("RSUs"). Each RSU represents a contingent right to receive one share of common stock. The RSUs will vest in four equal annual installments beginning on November 18, 2021.

Remarks:

	/s/ Christopher E. Brown, Attorney-in-Fact for Michael C. Doogue	11/04/2020
	** 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,seeInstruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal ViolationsSee18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
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