COSTAR GROUP INC

Ticker: CSGP CUSIP: 22160N109 Class: EQTY

HBK INVESTMENTS L P's Holding History (CIK: 0001011443)

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

Q4 2017

Shares 2,631 Value ($000) $781 Avg Close $29.30 Range $26.56 - $31.47

Q3 2017

Shares 15,100 Value ($000) $4,051 Avg Close $27.75 Range $25.54 - $28.80

Q4 2016

Shares 1,300 Value ($000) $245 Avg Close $19.64 Range $17.92 - $22.44

Q2 2014

Shares 21,200 Value ($000) $3,353 Avg Close $16.20 Range $14.70 - $19.34

Q1 2014

Shares 13,400 Value ($000) $2,502 Avg Close $18.86 Range $16.38 - $21.82

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2017	2,631	$781	$29.30	$26.56 - $31.47
Q3 2017	15,100	$4,051	$27.75	$25.54 - $28.80
Q4 2016	1,300	$245	$19.64	$17.92 - $22.44
Q2 2014	21,200	$3,353	$16.20	$14.70 - $19.34
Q1 2014	13,400	$2,502	$18.86	$16.38 - $21.82