COSTAR GROUP INC

Ticker: CSGP CUSIP: 22160N109 Class: EQTY

Calamos Advisors LLC's Holding History (CIK: 0001316507)

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

Q3 2016

Shares 174,411 Value ($000) $37,765 Avg Close $21.29 Range $20.25 - $22.48

Q2 2016

Shares 182,657 Value ($000) $39,940 Avg Close $19.77 Range $17.45 - $21.88

Q1 2016

Shares 208,916 Value ($000) $39,312 Avg Close $17.71 Range $14.65 - $20.50

Q4 2015

Shares 277,472 Value ($000) $57,351 Avg Close $19.90 Range $16.80 - $21.35

Q3 2015

Shares 250,354 Value ($000) $43,326 Avg Close $19.15 Range $16.35 - $22.35

Q2 2015

Shares 144,821 Value ($000) $29,147 Avg Close $20.39 Range $19.23 - $21.67

Period	Shares	Value ($000)	Average Close	Price Range
Q3 2016	174,411	$37,765	$21.29	$20.25 - $22.48
Q2 2016	182,657	$39,940	$19.77	$17.45 - $21.88
Q1 2016	208,916	$39,312	$17.71	$14.65 - $20.50
Q4 2015	277,472	$57,351	$19.90	$16.80 - $21.35
Q3 2015	250,354	$43,326	$19.15	$16.35 - $22.35
Q2 2015	144,821	$29,147	$20.39	$19.23 - $21.67