COSTAR GROUP INC

Ticker: CSGP CUSIP: 22160N109 Class: EQTY

Summit Creek Advisors LLC's Holding History (CIK: 0001333709)

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

Q4 2013

Shares 81,311 Value ($000) $15,008 Avg Close $17.69 Range $16.07 - $18.84

Q3 2013

Shares 120,468 Value ($000) $20,227 Avg Close $15.34 Range $12.98 - $17.22

Q2 2013

Shares 130,978 Value ($000) $16,905 Avg Close $11.32 Range $10.46 - $13.07

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2013	81,311	$15,008	$17.69	$16.07 - $18.84
Q3 2013	120,468	$20,227	$15.34	$12.98 - $17.22
Q2 2013	130,978	$16,905	$11.32	$10.46 - $13.07