Bruce Booth - Jun 1, 2021 Form 4 Insider Report for Magenta Therapeutics, Inc. (MGTA)

Role: Director
Signature: /s/ Ommer Chohan, Attorney-in-Fact for Bruce Booth
Stock symbol: MGTA
Transactions as of: Jun 1, 2021
Transactions value $: $0
Form type: 4
Date filed: 6/3/2021, 06:35 PM
Next filing: Jun 14, 2021

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	MGTA	Stock Option (Right to Buy)	Award	$0	+18.2K		$0.00	18.2K	Jun 1, 2021	Common Stock	18.2K	$12.91	Direct	F1, F2

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	This option shall vest and become exercisable in full upon the earlier to occur of (a) June 1, 2022 or (b) the next annual meeting of the Issuer's stockholders.
F2	This option was granted to the Reporting Person, a director of the Issuer. The proceeds of any sale of shares of common stock issued to the Reporting Person upon exercise of this option will be transferred to Atlas Venture Life Science Advisors, LLC and as such, the Reporting Person disclaims ownership of such securities reported herein for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, except to the extent of his pecuniary interest therein, if any.

Content

This option shall vest and become exercisable in full upon the earlier to occur of (a) June 1, 2022 or (b) the next annual meeting of the Issuer's stockholders.

This option was granted to the Reporting Person, a director of the Issuer. The proceeds of any sale of shares of common stock issued to the Reporting Person upon exercise of this option will be transferred to Atlas Venture Life Science Advisors, LLC and as such, the Reporting Person disclaims ownership of such securities reported herein for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, except to the extent of his pecuniary interest therein, if any.