Gareth T. Joyce - Mar 10, 2022 Form 4 Insider Report for Proterra Inc (PTRA)

Role: CEO and President, Director
Signature: /s/ Joshua Damm, Attorney-in-Fact
Stock symbol: PTRA
Transactions as of: Mar 10, 2022
Transactions value $: $100,141
Form type: 4
Date filed: 3/14/2022, 08:23 PM
Previous filing: Feb 28, 2022
Next filing: Aug 30, 2022

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	PTRA	Common Stock	Award	$0	+121K	+50.43%	$0.00	360K	Mar 10, 2022	Direct	F1
transaction	PTRA	Common Stock	Options Exercise	$100K	+21K	+5.82%	$4.78^*	381K	Mar 14, 2022	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)	Options Exercise	$0	-21K	-33.33%	$0.00	41.9K	Mar 14, 2022	Common Stock	21K	$4.78	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 vested as to 25% of the total shares on November 17, 2021, and thereafter vests as to the total shares quarterly until fully vested, subject to the Reporting Person's provision of service to the Issuer on each vesting date.