IROBOT CORP

Ticker: IRBTQ CUSIP: 462726100 Class: COM

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

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

Q1 2015

Shares 30,701 Value ($000) $1,002 Avg Close $32.46 Range $28.05 - $35.27

Q4 2014

Shares 30,719 Value ($000) $1,067 Avg Close $34.31 Range $29.73 - $38.10

Q2 2014

Shares 6,847 Value ($000) $280 Avg Close $36.15 Range $30.11 - $44.43

Period	Shares	Value ($000)	Average Close	Price Range
Q1 2015	30,701	$1,002	$32.46	$28.05 - $35.27
Q4 2014	30,719	$1,067	$34.31	$29.73 - $38.10
Q2 2014	6,847	$280	$36.15	$30.11 - $44.43