PLUG POWER INC

Ticker: PLUG CUSIP: 72919P202 Class: Common Stock

Mattern Wealth Management LLC's Holding History (CIK: 0001802376)

Note: Option positions (PUT/CALL) are excluded.

Q1 2021

Shares 11,050 Value ($000) $396 Avg Close $51.55 Range $30.10 - $75.49

Q4 2020

Shares 11,050 Value ($000) $375 Avg Close $22.64 Range $13.27 - $37.51

Q3 2020

Shares 30,180 Value ($000) $405 Avg Close $11.02 Range $7.07 - $14.35

Q2 2020

Shares 27,050 Value ($000) $222 Avg Close $4.68 Range $3.22 - $8.34

Q1 2020

Shares 17,050 Value ($000) $60 Avg Close $4.07 Range $2.53 - $6.05

Q4 2019

Shares 27,050 Value ($000) $85 Avg Close $3.04 Range $2.32 - $4.04

Period	Shares	Value ($000)	Average Close	Price Range
Q1 2021	11,050	$396	$51.55	$30.10 - $75.49
Q4 2020	11,050	$375	$22.64	$13.27 - $37.51
Q3 2020	30,180	$405	$11.02	$7.07 - $14.35
Q2 2020	27,050	$222	$4.68	$3.22 - $8.34
Q1 2020	17,050	$60	$4.07	$2.53 - $6.05
Q4 2019	27,050	$85	$3.04	$2.32 - $4.04