Last 12 months
Inside the activity.
7 purchase rows · 4 sale rows
Disclosed non-derivative P/S rows, by transaction month. Includes amendments and private transactions.Monthly counts
| Month | Purchases | Sales |
|---|---|---|
| Nov 2025 | 0 | 2 |
| Dec 2025 | 0 | 0 |
| Jan 2026 | 0 | 0 |
| Feb 2026 | 1 | 0 |
| Mar 2026 | 3 | 0 |
| Apr 2026 | 0 | 0 |
| May 2026 | 2 | 0 |
| Jun 2026 | 0 | 0 |
| Jul 2026 | 0 | 0 |
| Aug 2026 | 1 | 2 |
| Sep 2026 | 0 | 0 |
| Oct 2026 | 0 | 0 |
Latest available
Insider transactions
Purchases/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 | Owner / reported role | Activity / security | Shares / units | Reported price | Reported value | Details |
|---|---|---|---|---|---|---|
| August 07, 2026 Filed Aug 10, 2026 20:06 UTC |
Cann Cynthia CammettChief Accounting Officer
|
SaleCommon Stock, par value $0.01 per share | 4,788 | $30.78 | $147,374.64 |
DisclosureSEC source: 0001472762-26-000012 · wk-form4_1786392398.xml · nonDerivative · entry 1 Cann Cynthia Cammett · CIK 0001472762 · Chief Accounting Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 18,822 Read SEC document |
| August 05, 2026 Filed Aug 10, 2026 20:06 UTC |
Hill John WDirector
|
SaleCommon Stock, par value $0.01 per share | 3,500 | $30.21 | $105,735.00 |
DisclosureSEC source: 0001351689-26-000005 · wk-form4_1786392390.xml · nonDerivative · entry 1 Hill John W · CIK 0001351689 · Director 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 22,993 Read SEC document |
| August 04, 2026 Filed Aug 5, 2026 13:27 UTC |
FLORANCE ANDREW CDirector · Founder and CEO
|
PurchaseCommon Stock, par value $0.01 per share | 83,300 | $29.89 | $2,489,837.00 |
DisclosureSEC source: 0001628280-26-052968 · wk-form4_1785936417.xml · nonDerivative · entry 1 FLORANCE ANDREW C · CIK 0001066061 · Director · Founder and CEO 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 1,806,165.03 F1 · price: Average based on sales prices ranging from $29.57 to $29.99. Read SEC document |
| August 01, 2026 Filed Aug 4, 2026 21:24 UTC |
Cann Cynthia CammettChief Accounting Officer
|
Tax withholdingCommon Stock, par value $0.01 per share | 1,077 | $28.76 | $30,974.52 |
DisclosureSEC source: 0001472762-26-000010 · wk-form4_1785878680.xml · nonDerivative · entry 1 Cann Cynthia Cammett · CIK 0001472762 · Chief Accounting Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 23,610 Read SEC document |
| August 01, 2026 Filed Aug 4, 2026 21:24 UTC |
SAINT FREDERICK G.President, Marketplaces
|
Tax withholdingCommon Stock, par value $0.01 per share | 1,436 | $28.76 | $41,299.36 |
DisclosureSEC source: 0001500076-26-000010 · wk-form4_1785878675.xml · nonDerivative · entry 1 SAINT FREDERICK G. · CIK 0001500076 · President, Marketplaces 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 278,415 Read SEC document |
| July 31, 2026 Filed Aug 4, 2026 21:24 UTC |
Cann Cynthia CammettChief Accounting Officer
|
GrantRestricted Stock Units · Derivative | 26,078 | $0.00 | $0.00 |
DisclosureSEC source: 0001472762-26-000010 · wk-form4_1785878680.xml · derivative · entry 2 Cann Cynthia Cammett · CIK 0001472762 · Chief Accounting Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 26,078 Underlying: Common Stock, par value $0.01 per share · 26,078 shares Expires not disclosed F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of CoStar Group, Inc. common stock. F2 · derivative.exercise_date: The restricted stock units vest in four equal installments on August 1, 2027, August 1, 2028, August 1, 2029, and August 1, 2030. F2 · derivative.expiration_date: The restricted stock units vest in four equal installments on August 1, 2027, August 1, 2028, August 1, 2029, and August 1, 2030. Read SEC document |
| July 31, 2026 Filed Aug 4, 2026 21:24 UTC |
Rossmann Robin JackChief Financial Officer
|
GrantRestricted Stock Units · Derivative | 34,771 | $0.00 | $0.00 |
DisclosureSEC source: 0002146463-26-000005 · wk-form4_1785878685.xml · derivative · entry 1 Rossmann Robin Jack · CIK 0002146463 · Chief Financial Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 34,771 Underlying: Common Stock, par value $0.01 per share · 34,771 shares Expires not disclosed F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of CoStar Group, Inc. common stock. F2 · derivative.exercise_date: The restricted stock units vest in three equal installments on August 1, 2027, August 1, 2028 and August 1, 2029. F2 · derivative.expiration_date: The restricted stock units vest in three equal installments on August 1, 2027, August 1, 2028 and August 1, 2029. Read SEC document |
| July 01, 2026 Filed Jul 6, 2026 20:05 UTC |
LOWN CHRISTIAN M.Chief Financial Officer
|
Tax withholdingCommon Stock, par value $0.01 per share | 5,597 | $29.36 | $164,327.92 |
DisclosureSEC source: 0001701994-26-000006 · wk-form4_1783368329.xml · nonDerivative · entry 1 LOWN CHRISTIAN M. · CIK 0001701994 · Chief Financial Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 129,653 Read SEC document |
| June 23, 2026 Filed Jun 25, 2026 01:14 UTC |
Glaser Rachel CDirector
|
GrantCommon Stock, par value $0.01 per share | 8,262 | $0.00 | $0.00 |
DisclosureSEC source: 0001497570-26-000011 · wk-form4_1782350040.xml · nonDerivative · entry 1 Glaser Rachel C · CIK 0001497570 · Director 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 12,419 F1 · shares: The restricted stock award vests in full on the earlier of either the first anniversary of the grant date or the date of the Company's 2027 Annual Meeting of Stockholders. Read SEC document |
| June 23, 2026 Filed Jun 25, 2026 01:13 UTC |
BERISFORD JOHN LDirector
|
GrantCommon Stock, par value $0.01 per share | 8,262 | $0.00 | $0.00 |
DisclosureSEC source: 0001449719-26-000002 · wk-form4_1782350034.xml · nonDerivative · entry 1 BERISFORD JOHN L · CIK 0001449719 · Director 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 11,235 F1 · shares: The restricted stock award vests in full on the earlier of either the first anniversary of the grant date or the date of the Company's 2027 Annual Meeting of Stockholders. Read SEC document |
| June 23, 2026 Filed Jun 25, 2026 01:13 UTC |
Brunner Angelique G.Director
|
GrantCommon Stock, par value $0.01 per share | 8,262 | $0.00 | $0.00 |
DisclosureSEC source: 0001742356-26-000002 · wk-form4_1782350022.xml · nonDerivative · entry 1 Brunner Angelique G. · CIK 0001742356 · Director 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 18,428 F1 · shares: The restricted stock award vests in full on the earlier of either the first anniversary of the grant date or the date of the Company's 2027 Annual Meeting of Stockholders. Read SEC document |
| June 23, 2026 Filed Jun 25, 2026 01:13 UTC |
Hill John WDirector
|
GrantCommon Stock, par value $0.01 per share | 8,262 | $0.00 | $0.00 |
DisclosureSEC source: 0001351689-26-000002 · wk-form4_1782350028.xml · nonDerivative · entry 1 Hill John W · CIK 0001351689 · Director 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 26,493 F1 · shares: The restricted stock award vests in full on the earlier of either the first anniversary of the grant date or the date of the Company's 2027 Annual Meeting of Stockholders. Read SEC document |
| June 23, 2026 Filed Jun 25, 2026 01:13 UTC |
Sams Louise SDirector
|
GrantCommon Stock, par value $0.01 per share | 8,262 | $0.00 | $0.00 |
DisclosureSEC source: 0001796961-26-000004 · wk-form4_1782350010.xml · nonDerivative · entry 1 Sams Louise S · CIK 0001796961 · Director 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 28,671 F1 · shares: The restricted stock award vests in full on the earlier of either the first anniversary of the grant date or the date of the Company's 2027 Annual Meeting of Stockholders. Read SEC document |
| June 23, 2026 Filed Jun 25, 2026 01:13 UTC |
Musslewhite Robert WDirector
|
GrantCommon Stock, par value $0.01 per share | 8,262 | $0.00 | $0.00 |
DisclosureSEC source: 0001390194-26-000002 · wk-form4_1782350016.xml · nonDerivative · entry 1 Musslewhite Robert W · CIK 0001390194 · Director 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 26,539 F1 · shares: The restricted stock award vests in full on the earlier of either the first anniversary of the grant date or the date of the Company's 2027 Annual Meeting of Stockholders. Read SEC document |
| June 23, 2026 Filed Jun 25, 2026 01:12 UTC |
McCarthy Christine MDirector
|
GrantCommon Stock, par value $0.01 per share | 8,262 | $0.00 | $0.00 |
DisclosureSEC source: 0001628280-26-045326 · wk-form4_1782349960.xml · nonDerivative · entry 1 McCarthy Christine M · CIK 0001332169 · Director 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 11,585 F1 · shares: The restricted stock award vests in full on the earlier of either the first anniversary of the grant date or the date of the Company's 2027 Annual Meeting of Stockholders. F2 · balance_after: This amount includes shares that were inadvertently omitted from the insider's prior filing. Read SEC document |
| June 15, 2026 Filed Jun 16, 2026 21:32 UTC |
Cann Cynthia CammettChief Accounting Officer
|
Tax withholdingCommon Stock, par value $0.01 per share | 461 | $32.04 | $14,770.44 |
DisclosureSEC source: 0001472762-26-000008 · wk-form4_1781645530.xml · nonDerivative · entry 1 Cann Cynthia Cammett · CIK 0001472762 · Chief Accounting Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 24,687 Read SEC document |
| May 01, 2026 Filed May 4, 2026 10:01 UTC |
FLORANCE ANDREW CDirector · President and CEO
|
PurchaseCommon Stock, par value $0.01 per share | 3,100 | $35.82 | $111,042.00 |
DisclosureSEC source: 0001066061-26-000012 · wk-form4_1777888860.xml · nonDerivative · entry 2 FLORANCE ANDREW C · CIK 0001066061 · Director · President and CEO 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 1,722,865.03 F2 · price: Average based on sales prices ranging from $35.68 to $36.00. Read SEC document |
| May 01, 2026 Filed May 4, 2026 10:01 UTC |
FLORANCE ANDREW CDirector · President and CEO
|
PurchaseCommon Stock, par value $0.01 per share | 68,330 | $35.17 | $2,403,166.10 |
DisclosureSEC source: 0001066061-26-000012 · wk-form4_1777888860.xml · nonDerivative · entry 1 FLORANCE ANDREW C · CIK 0001066061 · Director · President and CEO 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 1,719,765.03 F1 · price: Average based on sales prices ranging from $34.67 to $35.67. Read SEC document |
| March 15, 2026 Filed Mar 17, 2026 21:47 UTC Amendment |
Boxer GeneGeneral Counsel and Secretary
|
Tax withholdingCommon Stock, par value $0.01 per share | 482 | $43.63 | $21,029.66 |
DisclosureSEC source: 0001758152-26-000008 · wk-form4a_1773784075.xml · nonDerivative · entry 1 Boxer Gene · CIK 0001758152 · General Counsel and Secretary 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 95,463 F1 · shares: This amount reflects a correction due to administrative error. F2 · price: On March 13, 2026, the last preceding business day, the closing price of the Company's common stock on Nasdaq was $43.63. Read SEC document |
| March 15, 2026 Filed Mar 17, 2026 20:12 UTC |
Ruggles LisaSenior VP, Global Operations
|
Tax withholdingCommon Stock, par value $0.01 per share | 2,977 | $43.63 | $129,886.51 |
DisclosureSEC source: 0001717178-26-000008 · wk-form4_1773778361.xml · nonDerivative · entry 1 Ruggles Lisa · CIK 0001717178 · Senior VP, Global Operations 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 174,915 F1 · price: On March 13, 2026, the last preceding business day, the closing price of the Company's common stock on Nasdaq was $43.63. Read SEC document |
| March 15, 2026 Filed Mar 17, 2026 20:12 UTC |
Boxer GeneGeneral Counsel and Secretary
|
Tax withholdingCommon Stock, par value $0.01 per share | 428 | $43.63 | $18,673.64 |
DisclosureSEC source: 0001758152-26-000006 · wk-form4_1773778356.xml · nonDerivative · entry 1 Boxer Gene · CIK 0001758152 · General Counsel and Secretary 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 95,517 F1 · price: On March 13, 2026, the last preceding business day, the closing price of the Company's common stock on Nasdaq was $43.63. Read SEC document |
| March 15, 2026 Filed Mar 17, 2026 20:12 UTC |
SIMURO FRANKChief Technology Officer
|
Tax withholdingCommon Stock, par value $0.01 per share | 11,107 | $43.63 | $484,598.41 |
DisclosureSEC source: 0001925960-26-000008 · wk-form4_1773778348.xml · nonDerivative · entry 1 SIMURO FRANK · CIK 0001925960 · Chief Technology Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 414,491 F1 · price: On March 13, 2026, the last preceding business day, the closing price of the Company's common stock on Nasdaq was $43.63. Read SEC document |
| March 15, 2026 Filed Mar 17, 2026 20:12 UTC |
DESMARAIS MICHAEL JChief Human Resources Officer
|
Tax withholdingCommon Stock, par value $0.01 per share | 2,873 | $43.63 | $125,348.99 |
DisclosureSEC source: 0001925959-26-000006 · wk-form4_1773778333.xml · nonDerivative · entry 1 DESMARAIS MICHAEL J · CIK 0001925959 · Chief Human Resources Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 87,725 F1 · price: On March 13, 2026, the last preceding business day, the closing price of the Company's common stock on Nasdaq was $43.63. Read SEC document |
| March 15, 2026 Filed Mar 17, 2026 20:12 UTC |
Cann Cynthia CammettChief Accounting Officer
|
Tax withholdingCommon Stock, par value $0.01 per share | 1,194 | $43.63 | $52,094.22 |
DisclosureSEC source: 0001472762-26-000006 · wk-form4_1773778327.xml · nonDerivative · entry 1 Cann Cynthia Cammett · CIK 0001472762 · Chief Accounting Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 25,148 F1 · price: On March 13, 2026, the last preceding business day, the closing price of the Company's common stock on Nasdaq was $43.63. Read SEC document |
| March 10, 2026 Filed Mar 11, 2026 21:18 UTC |
FLORANCE ANDREW CDirector · President and CEO
|
GrantCommon Stock, par value $0.01 per share | 124,162 | Not disclosed | Not disclosed |
DisclosureSEC source: 0001066061-26-000010 · wk-form4_1773263894.xml · nonDerivative · entry 1 FLORANCE ANDREW C · CIK 0001066061 · Director · President and CEO 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 1,651,435.03 F1 · price: Pursuant to the Management Stock Purchase Plan, all or a portion of the reporting person's annual cash incentive amount was converted to Deferred Stock Units (each equivalent to one share of common stock) at $46.34 per unit, and the Company awarded the reporting person Restricted Stock Units that vest in full after four years for an equal number of shares of common stock. Read SEC document |
| March 10, 2026 Filed Mar 11, 2026 21:18 UTC |
Cann Cynthia CammettChief Accounting Officer
|
GrantCommon Stock, par value $0.01 per share | 4,374 | Not disclosed | Not disclosed |
DisclosureSEC source: 0001472762-26-000004 · wk-form4_1773263900.xml · nonDerivative · entry 1 Cann Cynthia Cammett · CIK 0001472762 · Chief Accounting Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 26,342 F1 · price: Pursuant to the Management Stock Purchase Plan, all or a portion of the reporting person's annual cash incentive amount was converted to Deferred Stock Units (each equivalent to one share of common stock) at $46.34 per unit, and the Company awarded the reporting person Restricted Stock Units that vest in full after four years for an equal number of shares of common stock. Read SEC document |
| March 10, 2026 Filed Mar 11, 2026 21:18 UTC |
LOWN CHRISTIAN M.Chief Financial Officer
|
GrantCommon Stock, par value $0.01 per share | 12,268 | Not disclosed | Not disclosed |
DisclosureSEC source: 0001701994-26-000004 · wk-form4_1773263888.xml · nonDerivative · entry 1 LOWN CHRISTIAN M. · CIK 0001701994 · Chief Financial Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 135,250 F1 · price: Pursuant to the Management Stock Purchase Plan, all or a portion of the reporting person's annual cash incentive amount was converted to Deferred Stock Units (each equivalent to one share of common stock) at $46.34 per unit, and the Company awarded the reporting person Restricted Stock Units that vest in full after four years for an equal number of shares of common stock. Read SEC document |
| March 10, 2026 Filed Mar 11, 2026 21:18 UTC |
Boxer GeneGeneral Counsel and Secretary
|
GrantCommon Stock, par value $0.01 per share | 21,920 | Not disclosed | Not disclosed |
DisclosureSEC source: 0001758152-26-000004 · wk-form4_1773263882.xml · nonDerivative · entry 1 Boxer Gene · CIK 0001758152 · General Counsel and Secretary 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 95,945 F1 · price: Pursuant to the Management Stock Purchase Plan, all or a portion of the reporting person's annual cash incentive amount was converted to Deferred Stock Units (each equivalent to one share of common stock) at $46.34 per unit, and the Company awarded the reporting person Restricted Stock Units that vest in full after four years for an equal number of shares of common stock. Read SEC document |
| March 10, 2026 Filed Mar 11, 2026 21:17 UTC |
DESMARAIS MICHAEL JChief Human Resources Officer
|
GrantCommon Stock, par value $0.01 per share | 17,676 | Not disclosed | Not disclosed |
DisclosureSEC source: 0001925959-26-000004 · wk-form4_1773263877.xml · nonDerivative · entry 1 DESMARAIS MICHAEL J · CIK 0001925959 · Chief Human Resources Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 90,598 F1 · price: Pursuant to the Management Stock Purchase Plan, all or a portion of the reporting person's annual cash incentive amount was converted to Deferred Stock Units (each equivalent to one share of common stock) at $46.34 per unit, and the Company awarded the reporting person Restricted Stock Units that vest in full after four years for an equal number of shares of common stock. Read SEC document |
| March 06, 2026 Filed Mar 9, 2026 12:00 UTC |
Sams Louise SDirector
|
PurchaseCommon Stock, par value $0.01 per share | 1,000 | $48.36 | $48,360.00 |
DisclosureSEC source: 0001057352-26-000022 · wk-form4_1773057605.xml · nonDerivative · entry 1 Sams Louise S · CIK 0001796961 · Director 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 20,409 Read SEC document |
| March 02, 2026 Filed Mar 3, 2026 21:09 UTC |
SAINT FREDERICK G.President, Marketplaces
|
PurchaseCommon Stock, par value $0.01 per share | 20,000 | $45.33 | $906,600.00 |
DisclosureSEC source: 0001500076-26-000006 · wk-form4_1772572144.xml · nonDerivative · entry 2 SAINT FREDERICK G. · CIK 0001500076 · President, Marketplaces 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 279,851 F2 · price: Average based on sales prices ranging from $45.26 to $45.38 Read SEC document |
| March 02, 2026 Filed Mar 3, 2026 21:09 UTC |
Glaser Rachel CDirector
|
PurchaseCommon Stock, par value $0.01 per share | 1,000 | $44.94 | $44,940.00 |
DisclosureSEC source: 0001497570-26-000004 · wk-form4_1772572173.xml · nonDerivative · entry 1 Glaser Rachel C · CIK 0001497570 · Director 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 4,157 F1 · balance_after: This amount includes shares that were inadvertently omitted from the insider's prior filing. Read SEC document |
| March 01, 2026 Filed Mar 4, 2026 00:06 UTC |
FLORANCE ANDREW CDirector · President and CEO
|
Tax withholdingCommon Stock, par value $0.01 per share | 59,593 | $44.63 | $2,659,635.59 |
DisclosureSEC source: 0001066061-26-000008 · wk-form4_1772582787.xml · nonDerivative · entry 1 FLORANCE ANDREW C · CIK 0001066061 · Director · President and CEO 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 1,527,273.03 F1 · price: On February 27, 2026, the last preceding business day, the closing price of the Company's common stock on Nasdaq was $44.63. Read SEC document |
| March 01, 2026 Filed Mar 4, 2026 00:06 UTC |
LOWN CHRISTIAN M.Chief Financial Officer
|
Tax withholdingCommon Stock, par value $0.01 per share | 7,175 | $44.63 | $320,220.25 |
DisclosureSEC source: 0001701994-26-000002 · wk-form4_1772582797.xml · nonDerivative · entry 1 LOWN CHRISTIAN M. · CIK 0001701994 · Chief Financial Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 122,982 F1 · price: On February 27, 2026, the last preceding business day, the closing price of the Company's common stock on Nasdaq was $44.63. Read SEC document |
| March 01, 2026 Filed Mar 4, 2026 00:06 UTC |
DESMARAIS MICHAEL JChief Human Resources Officer
|
Tax withholdingCommon Stock, par value $0.01 per share | 6,353 | $44.63 | $283,534.39 |
DisclosureSEC source: 0001925959-26-000002 · wk-form4_1772582774.xml · nonDerivative · entry 1 DESMARAIS MICHAEL J · CIK 0001925959 · Chief Human Resources Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 72,922 F1 · price: On February 27, 2026, the last preceding business day, the closing price of the Company's common stock on Nasdaq was $44.63. F2 · balance_after: Includes 157 shares acquired under the CoStar Group, Inc. Employee Stock Purchase Plan. Read SEC document |
| March 01, 2026 Filed Mar 4, 2026 00:06 UTC |
Boxer GeneGeneral Counsel and Secretary
|
Tax withholdingCommon Stock, par value $0.01 per share | 4,547 | $44.63 | $202,932.61 |
DisclosureSEC source: 0001758152-26-000002 · wk-form4_1772582780.xml · nonDerivative · entry 1 Boxer Gene · CIK 0001758152 · General Counsel and Secretary 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 74,025 F1 · price: On February 27, 2026, the last preceding business day, the closing price of the Company's common stock on Nasdaq was $44.63. Read SEC document |
| March 01, 2026 Filed Mar 4, 2026 00:06 UTC |
Cann Cynthia CammettChief Accounting Officer
|
Tax withholdingCommon Stock, par value $0.01 per share | 1,385 | $44.63 | $61,812.55 |
DisclosureSEC source: 0001472762-26-000002 · wk-form4_1772582768.xml · nonDerivative · entry 1 Cann Cynthia Cammett · CIK 0001472762 · Chief Accounting Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 21,968 F1 · price: On February 27, 2026, the last preceding business day, the closing price of the Company's common stock on Nasdaq was $44.63. F2 · balance_after: Includes 142 shares acquired under the CoStar Group, Inc. Employee Stock Purchase Plan. Read SEC document |
| March 01, 2026 Filed Mar 4, 2026 00:06 UTC |
Ruggles LisaSenior VP, Global Operations
|
Tax withholdingCommon Stock, par value $0.01 per share | 8,931 | $44.63 | $398,590.53 |
DisclosureSEC source: 0001717178-26-000006 · wk-form4_1772582760.xml · nonDerivative · entry 1 Ruggles Lisa · CIK 0001717178 · Senior VP, Global Operations 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 177,892 F1 · price: On February 27, 2026, the last preceding business day, the closing price of the Company's common stock on Nasdaq was $44.63. Read SEC document |
| March 01, 2026 Filed Mar 4, 2026 00:05 UTC |
SIMURO FRANKChief Technology Officer
|
Tax withholdingCommon Stock, par value $0.01 per share | 18,702 | $44.63 | $834,670.26 |
DisclosureSEC source: 0001925960-26-000006 · wk-form4_1772582754.xml · nonDerivative · entry 1 SIMURO FRANK · CIK 0001925960 · Chief Technology Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 425,598 F1 · price: On February 27, 2026, the last preceding business day, the closing price of the Company's common stock on Nasdaq was $44.63. Read SEC document |
| March 01, 2026 Filed Mar 3, 2026 21:09 UTC |
SAINT FREDERICK G.President, Marketplaces
|
Tax withholdingCommon Stock, par value $0.01 per share | 11,096 | $44.63 | $495,214.48 |
DisclosureSEC source: 0001500076-26-000006 · wk-form4_1772572144.xml · nonDerivative · entry 1 SAINT FREDERICK G. · CIK 0001500076 · President, Marketplaces 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 259,851 F1 · price: On February 27, 2026, the last preceding business day, the closing price of the Company's common stock on Nasdaq was $44.63. Read SEC document |
| February 27, 2026 Filed Mar 2, 2026 21:00 UTC |
FLORANCE ANDREW CDirector · President and CEO
|
PurchaseCommon Stock, par value $0.01 per share | 55,720 | $44.52 | $2,480,654.40 |
DisclosureSEC source: 0001066061-26-000006 · wk-form4_1772485246.xml · nonDerivative · entry 1 FLORANCE ANDREW C · CIK 0001066061 · Director · President and CEO 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 1,586,866.03 F1 · price: Average based on sales prices ranging from $44.08 to $44.74. Read SEC document |
| February 27, 2026 Filed Mar 4, 2026 00:06 UTC |
FLORANCE ANDREW CDirector · President and CEO
|
GrantRestricted Stock Units · Derivative | 83,708 | $0.00 | $0.00 |
DisclosureSEC source: 0001066061-26-000008 · wk-form4_1772582787.xml · derivative · entry 2 FLORANCE ANDREW C · CIK 0001066061 · Director · President and CEO 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 83,708 Underlying: Common Stock, par value $0.01 per share · 83,708 shares Expires not disclosed F2 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of CoStar Group, Inc. common stock. F3 · derivative.exercise_date: The restricted stock units vest in three equal installments on March 1, 2027, March 1, 2028 and March 1, 2029. F3 · derivative.expiration_date: The restricted stock units vest in three equal installments on March 1, 2027, March 1, 2028 and March 1, 2029. Read SEC document |
| February 27, 2026 Filed Mar 4, 2026 00:06 UTC |
LOWN CHRISTIAN M.Chief Financial Officer
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GrantRestricted Stock Units · Derivative | 39,652 | $0.00 | $0.00 |
DisclosureSEC source: 0001701994-26-000002 · wk-form4_1772582797.xml · derivative · entry 2 LOWN CHRISTIAN M. · CIK 0001701994 · Chief Financial Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 39,652 Underlying: Common Stock, par value $0.01 per share · 39,652 shares Expires not disclosed F2 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of CoStar Group, Inc. common stock. F3 · derivative.exercise_date: The restricted stock units vest in three equal installments on March 1, 2027, March 1, 2028 and March 1, 2029. F3 · derivative.expiration_date: The restricted stock units vest in three equal installments on March 1, 2027, March 1, 2028 and March 1, 2029. Read SEC document |
| February 27, 2026 Filed Mar 4, 2026 00:06 UTC |
DESMARAIS MICHAEL JChief Human Resources Officer
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GrantRestricted Stock Units · Derivative | 17,926 | $0.00 | $0.00 |
DisclosureSEC source: 0001925959-26-000002 · wk-form4_1772582774.xml · derivative · entry 2 DESMARAIS MICHAEL J · CIK 0001925959 · Chief Human Resources Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 17,926 Underlying: Common Stock, par value $0.01 per share · 17,926 shares Expires not disclosed F3 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of CoStar Group, Inc. common stock. F4 · derivative.exercise_date: The restricted stock units vest in three equal installments on March 1, 2027, March 1, 2028 and March 1, 2029. F4 · derivative.expiration_date: The restricted stock units vest in three equal installments on March 1, 2027, March 1, 2028 and March 1, 2029. Read SEC document |
| February 27, 2026 Filed Mar 4, 2026 00:06 UTC |
SAINT FREDERICK G.President, Marketplaces
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GrantRestricted Stock Units · Derivative | 39,652 | $0.00 | $0.00 |
DisclosureSEC source: 0001500076-26-000008 · wk-form4_1772582792.xml · derivative · entry 1 SAINT FREDERICK G. · CIK 0001500076 · President, Marketplaces 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 39,652 Underlying: Common Stock, par value $0.01 per share · 39,652 shares Expires not disclosed F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of CoStar Group, Inc. common stock. F2 · derivative.exercise_date: The restricted stock units vest in three equal installments on March 1, 2027, March 1, 2028 and March 1, 2029. F2 · derivative.expiration_date: The restricted stock units vest in three equal installments on March 1, 2027, March 1, 2028 and March 1, 2029. Read SEC document |
| February 27, 2026 Filed Mar 4, 2026 00:06 UTC |
Boxer GeneGeneral Counsel and Secretary
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GrantRestricted Stock Units · Derivative | 26,888 | $0.00 | $0.00 |
DisclosureSEC source: 0001758152-26-000002 · wk-form4_1772582780.xml · derivative · entry 2 Boxer Gene · CIK 0001758152 · General Counsel and Secretary 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 26,888 Underlying: Common Stock, par value $0.01 per share · 26,888 shares Expires not disclosed F2 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of CoStar Group, Inc. common stock. F3 · derivative.exercise_date: The restricted stock units vest in three equal installments on March 1, 2027, March 1, 2028 and March 1, 2029. F3 · derivative.expiration_date: The restricted stock units vest in three equal installments on March 1, 2027, March 1, 2028 and March 1, 2029. Read SEC document |
| February 27, 2026 Filed Mar 4, 2026 00:06 UTC |
Cann Cynthia CammettChief Accounting Officer
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GrantRestricted Stock Units · Derivative | 6,834 | $0.00 | $0.00 |
DisclosureSEC source: 0001472762-26-000002 · wk-form4_1772582768.xml · derivative · entry 2 Cann Cynthia Cammett · CIK 0001472762 · Chief Accounting Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 6,834 Underlying: Common Stock, par value $0.01 per share · 6,834 shares Expires not disclosed F3 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of CoStar Group, Inc. common stock. F4 · derivative.exercise_date: The restricted stock units vest in four equal installments on March 1, 2027, March 1, 2028, March 1, 2029, and March 1, 2030. F4 · derivative.expiration_date: The restricted stock units vest in four equal installments on March 1, 2027, March 1, 2028, March 1, 2029, and March 1, 2030. Read SEC document |
| February 27, 2026 Filed Mar 4, 2026 00:06 UTC |
Ruggles LisaSenior VP, Global Operations
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GrantRestricted Stock Units · Derivative | 28,197 | $0.00 | $0.00 |
DisclosureSEC source: 0001717178-26-000006 · wk-form4_1772582760.xml · derivative · entry 2 Ruggles Lisa · CIK 0001717178 · Senior VP, Global Operations 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 28,197 Underlying: Common Stock, par value $0.01 per share · 28,197 shares Expires not disclosed F2 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of CoStar Group, Inc. common stock. F3 · derivative.exercise_date: The restricted stock units vest in three equal installments on March 1, 2027, March 1, 2028 and March 1, 2029. F3 · derivative.expiration_date: The restricted stock units vest in three equal installments on March 1, 2027, March 1, 2028 and March 1, 2029. Read SEC document |
| February 27, 2026 Filed Mar 4, 2026 00:05 UTC |
SIMURO FRANKChief Technology Officer
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GrantRestricted Stock Units · Derivative | 52,869 | $0.00 | $0.00 |
DisclosureSEC source: 0001925960-26-000006 · wk-form4_1772582754.xml · derivative · entry 2 SIMURO FRANK · CIK 0001925960 · Chief Technology Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 52,869 Underlying: Common Stock, par value $0.01 per share · 52,869 shares Expires not disclosed F2 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of CoStar Group, Inc. common stock. F3 · derivative.exercise_date: The restricted stock units vest in three equal installments on March 1, 2027, March 1, 2028 and March 1, 2029. F3 · derivative.expiration_date: The restricted stock units vest in three equal installments on March 1, 2027, March 1, 2028 and March 1, 2029. Read SEC document |
| February 19, 2026 Filed Feb 23, 2026 22:18 UTC |
FLORANCE ANDREW CDirector · President and CEO
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Tax withholdingCommon Stock, par value $0.01 per share | 19,221 | $49.07 | $943,174.47 |
DisclosureSEC source: 0001066061-26-000004 · wk-form4_1771885078.xml · nonDerivative · entry 2 FLORANCE ANDREW C · CIK 0001066061 · Director · President and CEO 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 1,531,146.03 F2 · price: On February 19, 2026, the closing price of the Company's Common Stock on Nasdaq was $49.07. 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.