XENCOR INC

Ticker: XNCR CUSIP: 98401F105 Class: Common Stock

DRIEHAUS CAPITAL MANAGEMENT LLC's Holding History (CIK: 0000938206)

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

Q4 2016

Shares 233,906 Value ($000) $6,156 Avg Close $24.05 Range $18.45 - $29.38

Q3 2016

Shares 115,336 Value ($000) $2,825 Avg Close $21.16 Range $17.65 - $26.50

Q4 2015

Shares 239,995 Value ($000) $3,509 Avg Close $13.45 Range $10.68 - $17.28

Q3 2015

Shares 203,852 Value ($000) $2,493 Avg Close $19.57 Range $11.81 - $24.82

Q2 2015

Shares 184,444 Value ($000) $4,052 Avg Close $17.04 Range $13.00 - $22.23

Q1 2015

Shares 150,046 Value ($000) $2,299 Avg Close $15.78 Range $13.67 - $19.50

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2016	233,906	$6,156	$24.05	$18.45 - $29.38
Q3 2016	115,336	$2,825	$21.16	$17.65 - $26.50
Q4 2015	239,995	$3,509	$13.45	$10.68 - $17.28
Q3 2015	203,852	$2,493	$19.57	$11.81 - $24.82
Q2 2015	184,444	$4,052	$17.04	$13.00 - $22.23
Q1 2015	150,046	$2,299	$15.78	$13.67 - $19.50