Justin B. Klee - Jan 6, 2022 Form 4 Insider Report for Amylyx Pharmaceuticals, Inc. (AMLX)

Role: Co-Chief Executive Officer, Director
Signature: /s/ Justin B. Klee
Stock symbol: AMLX
Transactions as of: Jan 6, 2022
Transactions value $: $0
Form type: 4
Date filed: 1/10/2022, 07:28 PM
Next filing: May 6, 2022

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	AMLX	Common Stock	Conversion of derivative security	$0	+4.87K	+0.2%	$0.00	2.49M	Jan 6, 2022	Direct	F1
transaction	AMLX	Common Stock	Award	$0	+75K	+3.01%	$0.00	2.56M	Jan 6, 2022	Direct	F2

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	AMLX	Series C-1 Preferred Stock	Conversion of derivative security	$0	-4.87K	-100%	$0.00^*	0	Jan 6, 2022	Common Stock	4.87K		Direct	F1
transaction	AMLX	Stock Option (right to buy)	Award	$0	+338K		$0.00	338K	Jan 6, 2022	Common Stock	338K	$19.00	Direct	F3

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

Explanation of Responses:

Id	Content
F1	Upon the closing of the Issuer's initial public offering, all shares of Series C-1 Preferred Stock will convert into the number of shares of Common Stock of the Issuer and have no expiration date.
F2	The reported transaction involves the Reporting Person's receipt of a restricted stock unit award (a "RSU"). The RSU shall vest in 4 equal annual installments, with the first installment vesting on the first anniversary of the date of the grant, subject to the Reporting Person's continued service to the Issuer through such vesting date.
F3	1/4 of the shares subject to the option shall vest and become exercisable on the one year anniversary of the date of grant, and the remaining shares shall vest monthly over the remaining 36 months, subject to the Reporting Person's continuous service to the Issuer through such vesting date.