PLUG POWER INC

Ticker: PLUG CUSIP: 72919P202 Class: Common Stock

WealthTrust Axiom LLC's Holding History (CIK: 0001425949)

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

Q3 2018

Shares 18,000 Value ($000) $34 Avg Close $1.95 Range $1.72 - $2.20

Q2 2018

Shares 20,000 Value ($000) $40 Avg Close $1.94 Range $1.71 - $2.27

Q1 2018

Shares 30,000 Value ($000) $56 Avg Close $2.01 Range $1.53 - $2.44

Q4 2017

Shares 35,000 Value ($000) $82 Avg Close $2.56 Range $2.17 - $3.21

Q3 2017

Shares 35,000 Value ($000) $91 Avg Close $2.23 Range $1.98 - $2.82

Q2 2017

Shares 35,000 Value ($000) $71 Avg Close $2.09 Range $1.25 - $2.70

Q1 2017

Shares 31,500 Value ($000) $43 Avg Close $1.15 Range $0.83 - $1.52

Q4 2016

Shares 26,500 Value ($000) $31 Avg Close $1.47 Range $1.18 - $1.76

Q3 2016

Shares 29,500 Value ($000) $50 Avg Close $1.66 Range $1.34 - $1.95

Q2 2016

Shares 29,500 Value ($000) $54 Avg Close $1.91 Range $1.60 - $2.28

Q1 2016

Shares 24,500 Value ($000) $50 Avg Close $1.88 Range $1.30 - $2.25

Q4 2015

Shares 24,500 Value ($000) $51 Avg Close $2.20 Range $1.76 - $2.98

Period	Shares	Value ($000)	Average Close	Price Range
Q3 2018	18,000	$34	$1.95	$1.72 - $2.20
Q2 2018	20,000	$40	$1.94	$1.71 - $2.27
Q1 2018	30,000	$56	$2.01	$1.53 - $2.44
Q4 2017	35,000	$82	$2.56	$2.17 - $3.21
Q3 2017	35,000	$91	$2.23	$1.98 - $2.82
Q2 2017	35,000	$71	$2.09	$1.25 - $2.70
Q1 2017	31,500	$43	$1.15	$0.83 - $1.52
Q4 2016	26,500	$31	$1.47	$1.18 - $1.76
Q3 2016	29,500	$50	$1.66	$1.34 - $1.95
Q2 2016	29,500	$54	$1.91	$1.60 - $2.28
Q1 2016	24,500	$50	$1.88	$1.30 - $2.25
Q4 2015	24,500	$51	$2.20	$1.76 - $2.98