PLUG POWER INC

Ticker: PLUG CUSIP: 72919P202 Class: Common Stock

THOMPSON DAVIS & CO., INC.'s Holding History (CIK: 0001017284)

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

Q3 2015
Shares 10,000 Value ($000) $18 Avg Close $2.13 Range $1.56 - $2.85
Q3 2014
Shares 2,000 Value ($000) $9 Avg Close $5.15 Range $4.00 - $6.47
Q2 2014
Shares 2,000 Value ($000) $9 Avg Close $5.09 Range $3.62 - $8.37
Q1 2014
Shares 1,000 Value ($000) $7 Avg Close $4.62 Range $1.89 - $11.72
Q4 2013
Shares 50,000 Value ($000) $78 Avg Close $0.97 Range $0.45 - $2.24