COSTAR GROUP INC - COM - Put Institutional Ownership

13F Institutional Holders and Ownership History from Q3 2014 to Q4 2025

Reported Shares, Excluding Options vs Price

Reported Value, Excluding Options

Total Investors

As of 31 Dec 2025, 1 institutional investors reported holding 123,950 shares of COSTAR GROUP INC - COM - Put.

Period	Reported Shares, Excl. Options	Value, Excl. Options	Value Change	Puts Notional Value	Price (Median)	Investors
2025 Q4	123,950	$8,334,000	+$8,334,000	$7,822,709	$67.24	1
2025 Q3				$14,064,169	$84.37	0
2025 Q2				$15,476,760	$80.40	0
2025 Q1				$18,808,275	$79.23	0
2024 Q4				$6,886,384	$71.59	0
2024 Q3				$7,188,864	$75.44	0
2024 Q2				$8,674,378	$74.14	0
2024 Q1				$6,626,620	$96.60	0
2023 Q4				$12,539,576	$87.39	0
2023 Q3				$9,595,482	$76.89	0
2023 Q2				$12,468,100	$89.00	0
2023 Q1				$12,571,735	$68.85	0
2022 Q4				$69,930,447	$77.28	0
2022 Q3				$92,530,000	$69.65	0
2022 Q2				$48,708,000	$60.41	0
2022 Q1				$4,069,000	$66.59	0
2021 Q4				$426,000	$78.65	0
2021 Q3				$4,587,000	$83.25	0
2021 Q2				$4,563,000	$82.81	0
2021 Q1				$986,000	$821.67	0
2020 Q4				$2,310,000	$92400.00	0
2020 Q3				$3,988,000	$84833.33	0
2020 Q2				$6,253,000	$35885.49	0
2020 Q1				$5,343,000	$58714.29	0
2019 Q4				$5,504,000	$59826.09	0
2019 Q3				$5,694,000	$59312.50	0
2019 Q2				$0	$67.24	0
2019 Q1				$186,000	$46500.00	0
2018 Q4				$0	$67.24	0
2018 Q3				$1,515,000	$42083.33	0
2018 Q2				$2,682,000	$41261.54	0
2018 Q1				$138,000	$1254.55	0
2017 Q4				$4,000	$571.43	0
2017 Q3				$5,000	$714.29	0
2017 Q2				$16,000	$1600.00	0
2016 Q4				$0	$67.24	0
2016 Q3				$5,000	$250.00	0
2015 Q4				$0	$67.24	0
2015 Q3				$6,000	$240.00	0
2015 Q1				$0	$67.24	0
2014 Q4				$2,000	$80.00	0
2014 Q3				$1,198,000	$155.58	0