HEADWATERS INC

CUSIP: 42210P102 Class: COMMON STOCK

ESSEX INVESTMENT MANAGEMENT CO LLC's Holding History (CIK: 0000201772)

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

Q1 2015
Shares 81,344 Value ($000) $1,492 Avg Close — Range —
Q4 2014
Shares 81,816 Value ($000) $1,226 Avg Close — Range —
Q3 2014
Shares 91,243 Value ($000) $1,144 Avg Close — Range —
Q2 2014
Shares 95,807 Value ($000) $1,331 Avg Close — Range —
Q1 2014
Shares 110,310 Value ($000) $1,457 Avg Close — Range —
Q4 2013
Shares 107,749 Value ($000) $1,055 Avg Close — Range —
Q3 2013
Shares 103,859 Value ($000) $934 Avg Close — Range —
Q2 2013
Shares 107,018 Value ($000) $946 Avg Close — Range —