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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
866291	Allegro Microsystems Inc.	ALGM	Semiconductors & Related Devices (3674)	462405937

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1828853	Jr. C. Thomas Teebagy	955 Perimeter Road Manchester NH 03103	Svp Of Operations And Quality	No	Yes	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Disposition	2021-10-21	2,789	$33.36	273,582	No	4	S	Indirect	By Thomas C. Teebagy, Jr. Trust
Common Stock	Disposition	2021-10-22	7,952	$33.45	265,630	No	4	S	Indirect	By Thomas C. Teebagy, Jr. Trust
Common Stock	Disposition	2021-10-25	4,831	$33.42	260,799	No	4	S	Indirect	By Thomas C. Teebagy, Jr. Trust

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	S	Indirect	By Thomas C. Teebagy, Jr. Trust
No	4	S	Indirect	By Thomas C. Teebagy, Jr. Trust
No	4	S	Indirect	By Thomas C. Teebagy, Jr. Trust

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock	65,198	Direct

Footnotes

The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on September 1, 2021.
The reported transaction involves sale transactions ranging from $33.35 to $33.39 per share. The weighted average price per share was $33.36. The Reporting Person undertakes to provide upon request by the SEC staff, the Issuer or a security holder of the Issuer, information regarding the number of shares sold at each separate price.
The reported transaction involves sale transactions ranging from $33.35 to $33.59 per share. The weighted average price per share was $33.45. The Reporting Person undertakes to provide upon request by the SEC staff, the Issuer or a security holder of the Issuer, information regarding the number of shares sold at each separate price.
The reported transaction involves sale transactions ranging from $33.35 to $33.58 per share. The weighted average price per share was $33.42. The Reporting Person undertakes to provide upon request by the SEC staff, the Issuer or a security holder of the Issuer, information regarding the number of shares sold at each separate price.