PLUG POWER INC

Ticker: PLUG CUSIP: 72919P202 Class: Common Stock

Yorktown Management & Research Co Inc's Holding History (CIK: 0001313559)

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

Q4 2021

Shares 38,100 Value ($000) $1,076 Avg Close $34.60 Range $23.81 - $46.50

Q3 2021

Shares 36,100 Value ($000) $922 Avg Close $26.79 Range $23.16 - $34.45

Q2 2021

Shares 34,600 Value ($000) $1,183 Avg Close $29.01 Range $18.47 - $37.75

Q1 2021

Shares 32,000 Value ($000) $1,147 Avg Close $51.55 Range $30.10 - $75.49

Q4 2020

Shares 40,000 Value ($000) $1,356 Avg Close $22.64 Range $13.27 - $37.51

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2021	38,100	$1,076	$34.60	$23.81 - $46.50
Q3 2021	36,100	$922	$26.79	$23.16 - $34.45
Q2 2021	34,600	$1,183	$29.01	$18.47 - $37.75
Q1 2021	32,000	$1,147	$51.55	$30.10 - $75.49
Q4 2020	40,000	$1,356	$22.64	$13.27 - $37.51