Joshua P. Ensign - Sep 2, 2021 Form 4 Insider Report for Proterra Inc (PTRA)

Role: Chief Operating Officer
Signature: /s/ Joshua Damm, Attorney-in-Fact
Stock symbol: PTRA
Transactions as of: Sep 2, 2021
Transactions value $: $0
Form type: 4
Date filed: 9/7/2021, 07:03 PM
Previous filing: Aug 18, 2021

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	PTRA	Common Stock	Award	$0	+36.4K	+205.13%	$0.00	54.2K	Sep 2, 2021	Direct	F1

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	PTRA	Employee Stock Option (Right to Buy)	Award	$0	+65.6K		$0.00	65.6K	Sep 2, 2021	Common Stock	65.6K	$11.33	Direct	F2

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

Explanation of Responses:

Id	Content
F1	Certain of the shares are subject to forfeiture to the Issuer if underlying vesting conditions are not met.
F2	The stock option vests as of 1/4 of the total shares annually beginning on September 1, 2021 until fully vested, subject to the Reporting Person's provision of service to the Issuer on each vesting date.