Reported relationships
Latest disclosed role at each company.
| Company | Last reported as | Report date | Published |
|---|---|---|---|
| COSTAR GROUP, INC.CSGP · Entity 3416 | Director · Founder and CEO | August 04, 2026 | August 05, 2026 |
Disclosed balances
About these balances
Latest available filing per company, not a reconstructed current portfolio. Matching sequences show the last reported balance with all source rows expandable; grouping alone does not establish account ownership. Do not add unresolved positions together. Filings may omit unchanged positions, and amendments may correct only part of an older disclosure. Jointly reported shares are not necessarily this owner's personal holdings.
COSTAR GROUP, INC.
Report date August 04, 2026 · Filed August 05, 2026
| Security / award | Ownership account | Disclosed shares / units | Disclosure context |
|---|---|---|---|
| Common Stock, par value $0.01 per shareSEC Table I · non-derivative | Direct | 1,806,165.03 |
Reported balance
After 2026-08-04 transaction · row 1
1 source rowRow 1 · 2026-08-04 · Purchase · Acquired 83,300 · Balance 1,806,165.03 F1: Average based on sales prices ranging from $29.57 to $29.99. |
Filing footnotes · ownership attribution and instrument terms
F1: Average based on sales prices ranging from $29.57 to $29.99.
Transaction history
JSON APIPurchases/sales include open-market and private transactions. Plan disclosure applies to the filing; individual rows may differ. “Not disclosed” is not “unplanned.”
The cutoff filters transaction history only. Company summaries and owner relationships show the latest available disclosures. Parser corrections can improve historical records.
| Transaction date | Company | Activity / security | Shares / units | Reported price | Reported value | Details |
|---|---|---|---|---|---|---|
| March 11, 2017 Filed Mar 14, 2017 21:25 UTC | COSTAR GROUP, INC. CSGP · Entity 3416 | Tax withholdingCommon Stock, par value $0.01 per share | 3,069 | $205.18 | $629,697.42 |
DisclosureSEC source: 0001066061-17-000004 · wf-form4_148952669201421.xml · nonDerivative · entry 1 FLORANCE ANDREW C · CIK 0001066061 · Director · President and CEO 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 148,885 F1 · balance_after: Represents all shares of Common Stock owned, consisting of 77,878 shares of Common Stock and 71,007 shares of Common Stock subject to unvested Restricted Stock grants. Read SEC document |
| March 05, 2017 Filed Mar 7, 2017 21:44 UTC | COSTAR GROUP, INC. CSGP · Entity 3416 | Tax withholdingCommon Stock, par value $0.01 per share | 3,205 | $206.13 | $660,646.65 |
DisclosureSEC source: 0001066061-17-000002 · wf-form4_148892307921980.xml · nonDerivative · entry 1 FLORANCE ANDREW C · CIK 0001066061 · Director · President and CEO 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 151,954 F1 · balance_after: Represents all shares of Common Stock owned, consisting of 74,914 shares of Common Stock and 77,040 shares of Common Stock subject to unvested Restricted Stock grants. Read SEC document |
| March 02, 2017 Filed Mar 2, 2017 23:14 UTC | COSTAR GROUP, INC. CSGP · Entity 3416 | GrantOption to Acquire Common Stock · Derivative | 34,600 | $0.00 Strike: $204.91 | $0.00 |
DisclosureSEC source: 0001057352-17-000014 · wf-form4_148849646393118.xml · derivative · entry 6 FLORANCE ANDREW C · CIK 0001066061 · Director · President and CEO 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 34,600 Underlying: Common Stock · 34,600 shares Expires 2027-03-01 F9 · derivative.exercise_date: The option vests in three equal installments on March 2, 2018, March 2, 2019 and March 2, 2020. Read SEC document |
| March 02, 2017 Filed Mar 2, 2017 23:14 UTC | COSTAR GROUP, INC. CSGP · Entity 3416 | SaleCommon Stock, par value $0.01 per share | 26,271 | $205.31 | $5,393,699.01 |
DisclosureSEC source: 0001057352-17-000014 · wf-form4_148849646393118.xml · nonDerivative · entry 5 FLORANCE ANDREW C · CIK 0001066061 · Director · President and CEO 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 155,159 F7 · price: Average based on sales prices ranging from $204.55 to $206.05. F8 · balance_after: Represents all shares of Common Stock owned, consisting of 71,819 shares of Common Stock and 83,340 shares of Common Stock subject to unvested Restricted Stock grants. Read SEC document |
| March 02, 2017 Filed Mar 2, 2017 23:14 UTC | COSTAR GROUP, INC. CSGP · Entity 3416 | GrantCommon Stock, par value $0.01 per share | 30,080 | $0.00 | $0.00 |
DisclosureSEC source: 0001057352-17-000014 · wf-form4_148849646393118.xml · nonDerivative · entry 4 FLORANCE ANDREW C · CIK 0001066061 · Director · President and CEO 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 181,430 F5 · shares: Includes a grant of 18,800 shares of restricted common stock that vest in three equal installments on March 2, 2018, March 2, 2019 and March 2, 2020, and a grant of 11,280 shares of restricted common stock that vest based upon CoStar Group, Inc.'s achievement of a three-year performance goal. F6 · balance_after: Represents all shares of Common Stock owned, consisting of 98,090 shares of Common Stock and 83,340 shares of Common Stock subject to unvested Restricted Stock grants. Read SEC document |
| March 02, 2017 Filed Mar 2, 2017 23:14 UTC | COSTAR GROUP, INC. CSGP · Entity 3416 | Tax withholdingCommon Stock, par value $0.01 per share | 3,302 | $206.80 | $682,853.60 |
DisclosureSEC source: 0001057352-17-000014 · wf-form4_148849646393118.xml · nonDerivative · entry 3 FLORANCE ANDREW C · CIK 0001066061 · Director · President and CEO 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 151,350 F4 · balance_after: Represents all shares of Common Stock owned, consisting of 98,090 shares of Common Stock and 53,260 shares of Common Stock subject to unvested Restricted Stock grants. Read SEC document |
| March 02, 2017 Filed Mar 2, 2017 23:14 UTC | COSTAR GROUP, INC. CSGP · Entity 3416 | Disposition to issuerCommon Stock, par value $0.01 per share | 2,871 | $0.00 | $0.00 |
DisclosureSEC source: 0001057352-17-000014 · wf-form4_148849646393118.xml · nonDerivative · entry 2 FLORANCE ANDREW C · CIK 0001066061 · Director · President and CEO 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 154,652 F2 · shares: Shares forfeited from February 28, 2014 performance restricted stock grant upon measurement and certification of achievement of the performance goal by the Compensation Committee. F3 · balance_after: Represents all shares of Common Stock owned, consisting of 94,903 shares of Common Stock and 59,749 shares of Common Stock subject to unvested Restricted Stock grants. Read SEC document |
| February 28, 2017 Filed Mar 2, 2017 23:14 UTC | COSTAR GROUP, INC. CSGP · Entity 3416 | Tax withholdingCommon Stock, par value $0.01 per share | 1,899 | $203.99 | $387,377.01 |
DisclosureSEC source: 0001057352-17-000014 · wf-form4_148849646393118.xml · nonDerivative · entry 1 FLORANCE ANDREW C · CIK 0001066061 · Director · President and CEO 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 157,523 F1 · balance_after: Represents all shares of Common Stock owned, consisting of 94,903 shares of Common Stock and 62,620 shares of Common Stock subject to unvested Restricted Stock grants. Read SEC document |
| December 29, 2016 Filed Dec 29, 2016 21:53 UTC | COSTAR GROUP, INC. CSGP · Entity 3416 | Exercise / conversionOption to Acquire Common Stock · Derivative | 978 | $0.00 Strike: $102.16 | $0.00 |
DisclosureSEC source: 0001057352-16-000171 · wf-form4_148304837284933.xml · derivative · entry 7 FLORANCE ANDREW C · CIK 0001066061 · Director · President and CEO 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 55,322 Underlying: Common Stock · 978 shares Expires 2023-03-10 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F7 · derivative.exercise_date: The option vested in three equal installments on March 11, 2014, March 11, 2015, and March 11, 2016. Read SEC document |
| December 29, 2016 Filed Dec 29, 2016 21:53 UTC | COSTAR GROUP, INC. CSGP · Entity 3416 | Exercise / conversionOption to Acquire Common Stock · Derivative | 1,696 | $0.00 Strike: $58.95 | $0.00 |
DisclosureSEC source: 0001057352-16-000171 · wf-form4_148304837284933.xml · derivative · entry 6 FLORANCE ANDREW C · CIK 0001066061 · Director · President and CEO 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 40,004 Underlying: Common Stock · 1,696 shares Expires 2022-02-20 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F6 · derivative.exercise_date: The option vested in three equal installments on February 21, 2013, February 21, 2014 and February 21, 2015. Read SEC document |
| December 29, 2016 Filed Dec 29, 2016 21:53 UTC | COSTAR GROUP, INC. CSGP · Entity 3416 | Exercise / conversionOption to Acquire Common Stock · Derivative | 499 | $0.00 Strike: $57.16 | $0.00 |
DisclosureSEC source: 0001057352-16-000171 · wf-form4_148304837284933.xml · derivative · entry 5 FLORANCE ANDREW C · CIK 0001066061 · Director · President and CEO 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 40,051 Underlying: Common Stock · 499 shares Expires 2021-03-03 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F5 · derivative.exercise_date: The option vested in three equal installments on March 4, 2012, March 4, 2013 and March 4, 2014. Read SEC document |
| December 29, 2016 Filed Dec 29, 2016 21:53 UTC | COSTAR GROUP, INC. CSGP · Entity 3416 | Exercise / conversionCommon Stock, par value $0.01 per share | 978 | $102.16 | $99,912.48 |
DisclosureSEC source: 0001057352-16-000171 · wf-form4_148304837284933.xml · nonDerivative · entry 4 FLORANCE ANDREW C · CIK 0001066061 · Director · President and CEO 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 159,422 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F4 · balance_after: Represents all shares of Common Stock owned, consisting of 91,668 shares of Common Stock and 67,754 shares of Common Stock subject to unvested Restricted Stock grants. Read SEC document |
| December 29, 2016 Filed Dec 29, 2016 21:53 UTC | COSTAR GROUP, INC. CSGP · Entity 3416 | Exercise / conversionCommon Stock, par value $0.01 per share | 1,696 | $58.95 | $99,979.20 |
DisclosureSEC source: 0001057352-16-000171 · wf-form4_148304837284933.xml · nonDerivative · entry 3 FLORANCE ANDREW C · CIK 0001066061 · Director · President and CEO 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 158,444 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F3 · balance_after: Represents all shares of Common Stock owned, consisting of 90,690 shares of Common Stock and 67,754 shares of Common Stock subject to unvested Restricted Stock grants. Read SEC document |
| December 29, 2016 Filed Dec 29, 2016 21:53 UTC | COSTAR GROUP, INC. CSGP · Entity 3416 | Exercise / conversionCommon Stock, par value $0.01 per share | 499 | $57.16 | $28,522.84 |
DisclosureSEC source: 0001057352-16-000171 · wf-form4_148304837284933.xml · nonDerivative · entry 2 FLORANCE ANDREW C · CIK 0001066061 · Director · President and CEO 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 156,748 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F2 · balance_after: Represents all shares of Common Stock owned, consisting of 88,994 shares of Common Stock and 67,754 shares of Common Stock subject to unvested Restricted Stock grants. Read SEC document |
| June 03, 2016 Filed Dec 29, 2016 21:53 UTC | COSTAR GROUP, INC. CSGP · Entity 3416 | GiftCommon Stock, par value $0.01 per share | 8,400 | $0.00 | $0.00 |
DisclosureSEC source: 0001057352-16-000171 · wf-form4_148304837284933.xml · nonDerivative · entry 1 FLORANCE ANDREW C · CIK 0001066061 · Director · President and CEO 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 156,249 F1 · balance_after: Represents all shares of Common Stock owned, consisting of 88,495 shares of Common Stock and 67,754 shares of Common Stock subject to unvested Restricted Stock grants. Read SEC document |
Value uses the disclosed total when available, otherwise shares × reported transaction price. It is not an estimate of exercise cash cost or investment performance.