PLUG POWER INC

Ticker: PLUG CUSIP: 72919P202 Class: Common Stock

WELCH & FORBES LLC's Holding History (CIK: 0000105495)

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

Q3 2019
Shares 10,250 Value ($000) $27 Avg Close $2.32 Range $1.88 - $2.94
Q2 2019
Shares 10,250 Value ($000) $23 Avg Close $2.48 Range $1.86 - $2.87
Q1 2019
Shares 10,250 Value ($000) $25 Avg Close $1.74 Range $1.23 - $2.65
Q4 2018
Shares 10,250 Value ($000) $13 Avg Close $1.70 Range $0.99 - $2.00
Q3 2018
Shares 10,250 Value ($000) $20 Avg Close $1.95 Range $1.72 - $2.20
Q2 2018
Shares 10,250 Value ($000) $21 Avg Close $1.94 Range $1.71 - $2.27
Q1 2018
Shares 10,250 Value ($000) $19 Avg Close $2.01 Range $1.53 - $2.44
Q4 2017
Shares 10,250 Value ($000) $24 Avg Close $2.56 Range $2.17 - $3.21
Q3 2017
Shares 10,250 Value ($000) $27 Avg Close $2.23 Range $1.98 - $2.82
Q2 2017
Shares 10,250 Value ($000) $21 Avg Close $2.09 Range $1.25 - $2.70
Q1 2017
Shares 10,250 Value ($000) $14 Avg Close $1.15 Range $0.83 - $1.52
Q4 2016
Shares 10,250 Value ($000) $12 Avg Close $1.47 Range $1.18 - $1.76
Q3 2016
Shares 10,250 Value ($000) $18 Avg Close $1.66 Range $1.34 - $1.95
Q2 2016
Shares 10,250 Value ($000) $19 Avg Close $1.91 Range $1.60 - $2.28