FERROGLOBE PLC

Ticker: GSM CUSIP: G33856108 Class: SHS

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

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

Q2 2016

Shares 66,400 Value ($000) $572 Avg Close $8.61 Range $7.43 - $10.02

Q1 2016

Shares 67,057 Value ($000) $591 Avg Close $8.04 Range $6.47 - $10.65

Q4 2015

Shares 42,862 Value ($000) $461 Avg Close $10.52 Range $8.24 - $13.33

Period	Shares	Value ($000)	Average Close	Price Range
Q2 2016	66,400	$572	$8.61	$7.43 - $10.02
Q1 2016	67,057	$591	$8.04	$6.47 - $10.65
Q4 2015	42,862	$461	$10.52	$8.24 - $13.33