XENON PHARMACEUTICALS INC

Ticker: XENE CUSIP: 98420N105 Class: Common Stock

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

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

Q4 2016

Shares 70,172 Value ($000) $540 Avg Close $8.03 Range $7.35 - $8.75

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2016	70,172	$540	$8.03	$7.35 - $8.75