Frederick G. Saint

Date	Company	Security	Transaction	Code	Indirect	10b5-1	$Price	#Shares	$Value	#Remaining
15 Feb 25	CSGP CoStar	Common Stock, par value $0.01 per share	Payment of exercise	Dispose F	No	No	74.06	2,349	173.97 k	293,245
26 Jul 24	CSGP CoStar	Common Stock, par value $0.01 per share	Grant	Acquire A	No	No	0	12,738	0.00	295,594
16 May 24	CSGP CoStar	Common Stock, par value $0.01 per share	Sell	Dispose S	No	No	88.43	2,500	221.08 k	282,856
1 Mar 24	CSGP CoStar	Common Stock, par value $0.01 per share	Payment of exercise	Dispose F	No	No	87.03	6,351	552.73 k	285,356
22 Feb 24	CSGP CoStar	Common Stock, par value $0.01 per share	Grant	Acquire A	No	No	0	69,160	0.00	291,707
22 Feb 24	CSGP CoStar	Common Stock, par value $0.01 per share	Payment of exercise	Dispose F	No	No	83.98	4,881	409.91 k	222,547
22 Feb 24	CSGP CoStar	Common Stock, par value $0.01 per share	Sale back to company	Dispose D	No	No	0	8,000	0.00	227,428
22 Feb 24	CSGP CoStar	Option to Acquire Common Stock Common Stock	Grant	Acquire A	No	No	82.47	17,000	1.40 mm	17,000

Data from 3, 4 and 5 filings. Values as filed, not updated for current price.