BALLARD PWR SYS INC NEW

Ticker: BLDP CUSIP: 058586108 Class: COM

BERKSHIRE ASSET MANAGEMENT LLC/PA's Holding History (CIK: 0000949012)

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

Q4 2017

Shares 10,000 Value ($000) $44 Avg Close $4.89 Range $4.23 - $5.94

Q3 2017

Shares 10,000 Value ($000) $47 Avg Close $3.30 Range $2.63 - $5.27

Q2 2017

Shares 10,000 Value ($000) $29 Avg Close $2.81 Range $2.17 - $3.48

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2017	10,000	$44	$4.89	$4.23 - $5.94
Q3 2017	10,000	$47	$3.30	$2.63 - $5.27
Q2 2017	10,000	$29	$2.81	$2.17 - $3.48