Reported relationships
Latest disclosed role at each company.
| Company | Last reported as | Report date | Published |
|---|---|---|---|
| COSTAR GROUP, INC.CSGP · Entity 3416 | Chief Human Resources Officer | March 15, 2026 | March 17, 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 March 15, 2026 · Filed March 17, 2026
| Security / award | Ownership account | Disclosed shares / units | Disclosure context |
|---|---|---|---|
| Common Stock, par value $0.01 per shareSEC Table I · non-derivative | Direct | 87,725 |
Reported balance
After 2026-03-15 transaction · row 1
1 source rowRow 1 · 2026-03-15 · Tax withholding · Disposed 2,873 · Balance 87,725 F1: On March 13, 2026, the last preceding business day, the closing price of the Company's common stock on Nasdaq was $43.63. |
Filing footnotes · ownership attribution and instrument terms
F1: On March 13, 2026, the last preceding business day, the closing price of the Company's common stock on Nasdaq was $43.63.
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 15, 2026 Filed Mar 17, 2026 20:12 UTC | COSTAR GROUP, INC. CSGP · Entity 3416 | 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 10, 2026 Filed Mar 11, 2026 21:17 UTC | COSTAR GROUP, INC. CSGP · Entity 3416 | 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 01, 2026 Filed Mar 4, 2026 00:06 UTC | COSTAR GROUP, INC. CSGP · Entity 3416 | 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 |
| February 27, 2026 Filed Mar 4, 2026 00:06 UTC | COSTAR GROUP, INC. CSGP · Entity 3416 | 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 |
| March 15, 2025 Filed Mar 19, 2025 00:33 UTC | COSTAR GROUP, INC. CSGP · Entity 3416 | Tax withholdingCommon Stock, par value $0.01 per share | 3,641 | $78.73 | $286,655.93 |
DisclosureSEC source: 0001057352-25-000057 · wk-form4_1742344431.xml · nonDerivative · entry 1 DESMARAIS MICHAEL J · CIK 0001925959 · Chief Human Resources Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 79,118 Read SEC document |
| March 05, 2025 Filed Mar 7, 2025 23:06 UTC | COSTAR GROUP, INC. CSGP · Entity 3416 | GrantCommon Stock, par value $0.01 per share | 9,026 | Not disclosed | Not disclosed |
DisclosureSEC source: 0001057352-25-000045 · wk-form4_1741388765.xml · nonDerivative · entry 1 DESMARAIS MICHAEL J · CIK 0001925959 · Chief Human Resources Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 82,759 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 $77.81 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 01, 2025 Filed Mar 4, 2025 00:10 UTC | COSTAR GROUP, INC. CSGP · Entity 3416 | Tax withholdingCommon Stock, par value $0.01 per share | 3,893 | $76.25 | $296,841.25 |
DisclosureSEC source: 0001057352-25-000039 · wk-form4_1741047044.xml · nonDerivative · entry 2 DESMARAIS MICHAEL J · CIK 0001925959 · Chief Human Resources Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 73,733 Read SEC document |
| February 27, 2025 Filed Mar 4, 2025 00:10 UTC | COSTAR GROUP, INC. CSGP · Entity 3416 | GrantCommon Stock, par value $0.01 per share | 18,828 | $0.00 | $0.00 |
DisclosureSEC source: 0001057352-25-000039 · wk-form4_1741047044.xml · nonDerivative · entry 1 DESMARAIS MICHAEL J · CIK 0001925959 · Chief Human Resources Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 77,626 Read SEC document |
| November 26, 2024 Filed Nov 27, 2024 23:33 UTC | COSTAR GROUP, INC. CSGP · Entity 3416 | SaleCommon Stock, par value $0.01 per share | 5,500 | $79.88 | $439,340.00 |
DisclosureSEC source: 0001057352-24-000132 · wk-form4_1732750423.xml · nonDerivative · entry 1 DESMARAIS MICHAEL J · CIK 0001925959 · Chief Human Resources Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 58,798 F1 · price: Average based on sales prices ranging from $79.71 to $80.23. F2 · balance_after: Includes 211 shares purchased pursuant to the Issuer's Employee Stock Purchase Plan since the Reporting Person's last Form 4. Read SEC document |
| April 26, 2024 Filed Apr 30, 2024 20:13 UTC | COSTAR GROUP, INC. CSGP · Entity 3416 | SaleCommon Stock, par value $0.01 per share | 3,800 | $92.67 | $352,146.00 |
DisclosureSEC source: 0001057352-24-000063 · wk-form4_1714508016.xml · nonDerivative · entry 1 DESMARAIS MICHAEL J · CIK 0001925959 · Chief Human Resources Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 64,087 F1 · price: Average based on sales prices ranging from $92.67 to $92.70. Read SEC document |
| March 15, 2024 Filed Mar 19, 2024 20:18 UTC | COSTAR GROUP, INC. CSGP · Entity 3416 | Tax withholdingCommon Stock, par value $0.01 per share | 2,267 | $87.87 | $199,201.29 |
DisclosureSEC source: 0001057352-24-000053 · wk-form4_1710879493.xml · nonDerivative · entry 1 DESMARAIS MICHAEL J · CIK 0001925959 · Chief Human Resources Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 67,887 Read SEC document |
| March 01, 2024 Filed Mar 5, 2024 21:32 UTC | COSTAR GROUP, INC. CSGP · Entity 3416 | Tax withholdingCommon Stock, par value $0.01 per share | 1,829 | $87.03 | $159,177.87 |
DisclosureSEC source: 0001057352-24-000036 · wk-form4_1709674276.xml · nonDerivative · entry 2 DESMARAIS MICHAEL J · CIK 0001925959 · Chief Human Resources Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 70,154 Read SEC document |
| March 01, 2024 Filed Mar 5, 2024 21:32 UTC | COSTAR GROUP, INC. CSGP · Entity 3416 | GrantCommon Stock, par value $0.01 per share | 6,924 | Not disclosed | Not disclosed |
DisclosureSEC source: 0001057352-24-000036 · wk-form4_1709674276.xml · nonDerivative · entry 1 DESMARAIS MICHAEL J · CIK 0001925959 · Chief Human Resources Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 71,983 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 $88.27 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 |
| February 22, 2024 Filed Feb 27, 2024 01:09 UTC | COSTAR GROUP, INC. CSGP · Entity 3416 | GrantCommon Stock, par value $0.01 per share | 16,976 | $0.00 | $0.00 |
DisclosureSEC source: 0001057352-24-000024 · wk-form4_1708996146.xml · nonDerivative · entry 1 DESMARAIS MICHAEL J · CIK 0001925959 · Chief Human Resources Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 65,059 F1 · balance_after: A historical Form 4 filed on behalf of the Reporting Person underreported the Reporting Person's beneficial ownership by an immaterial amount. The Reporting Person's ownership has been corrected on this Form 4. Read SEC document |
| October 01, 2023 Filed Oct 2, 2023 20:17 UTC | COSTAR GROUP, INC. CSGP · Entity 3416 | Tax withholdingCommon Stock, par value $0.01 per share | 1,663 | $76.89 | $127,868.07 |
DisclosureSEC source: 0001057352-23-000123 · wk-form4_1696277859.xml · nonDerivative · entry 1 DESMARAIS MICHAEL J · CIK 0001925959 · Chief Human Resources Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 44,265 Read SEC document |
| March 15, 2023 Filed Mar 17, 2023 21:32 UTC | COSTAR GROUP, INC. CSGP · Entity 3416 | Tax withholdingCommon Stock, par value $0.01 per share | 2,210 | $67.62 | $149,440.20 |
DisclosureSEC source: 0001057352-23-000058 · wf-form4_167908873228528.xml · nonDerivative · entry 2 DESMARAIS MICHAEL J · CIK 0001925959 · Chief Human Resources Officer 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 45,928 Read SEC document |
| March 15, 2023 Filed Mar 17, 2023 21:32 UTC | COSTAR GROUP, INC. CSGP · Entity 3416 | GrantCommon Stock, par value $0.01 per share | 3,292 | Not disclosed | Not disclosed |
DisclosureSEC source: 0001057352-23-000058 · wf-form4_167908873228528.xml · nonDerivative · entry 1 DESMARAIS MICHAEL J · CIK 0001925959 · Chief Human Resources Officer 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 48,138 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 $67.36 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 08, 2023 Filed Mar 9, 2023 21:57 UTC | COSTAR GROUP, INC. CSGP · Entity 3416 | SaleCommon Stock, par value $0.01 per share | 5,600 | $70.36 | $394,016.00 |
DisclosureSEC source: 0001057352-23-000048 · wf-form4_167839902990156.xml · nonDerivative · entry 1 DESMARAIS MICHAEL J · CIK 0001925959 · Chief Human Resources Officer 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 44,846 F1 · price: Average based on sales prices ranging from $70.00 to $70.57. Read SEC document |
| March 01, 2023 Filed Mar 3, 2023 22:48 UTC | COSTAR GROUP, INC. CSGP · Entity 3416 | Tax withholdingCommon Stock, par value $0.01 per share | 593 | $70.66 | $41,901.38 |
DisclosureSEC source: 0001057352-23-000038 · wf-form4_167788365006119.xml · nonDerivative · entry 1 DESMARAIS MICHAEL J · CIK 0001925959 · Chief Human Resources Officer 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 50,446 Read SEC document |
| February 24, 2023 Filed Feb 27, 2023 21:58 UTC | COSTAR GROUP, INC. CSGP · Entity 3416 | GrantCommon Stock, par value $0.01 per share | 14,139 | $70.73 | $1,000,051.47 |
DisclosureSEC source: 0001057352-23-000032 · wf-form4_167753505106008.xml · nonDerivative · entry 1 DESMARAIS MICHAEL J · CIK 0001925959 · Chief Human Resources Officer 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 51,039 F1 · shares: Represents a grant of 14,139 shares of restricted common stock that vest in four equal installments on March 1, 2024, March 1, 2025, March 1, 2026, and March 1, 2027. Read SEC document |
| October 28, 2022 Filed Oct 31, 2022 20:17 UTC | COSTAR GROUP, INC. CSGP · Entity 3416 | SaleCommon Stock, par value $0.01 per share | 1,296 | $82.81 | $107,321.76 |
DisclosureSEC source: 0001057352-22-000123 · wf-form4_166724740471482.xml · nonDerivative · entry 1 DESMARAIS MICHAEL J · CIK 0001925959 · Chief Human Resources Officer 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 36,900 F1 · price: Average based on sales prices ranging from $82.81 to $82.82. F2 · balance_after: Represents all shares of Common Stock owned, consisting of 2,857 shares of Common Stock and 30,471 shares of Common Stock subject to unvested Restricted Stock grants, 1,786 shares of Deferred Stock Units and 1,786 shares of unvested Restricted Stock Units. Read SEC document |
| October 01, 2022 Filed Oct 4, 2022 21:56 UTC | COSTAR GROUP, INC. CSGP · Entity 3416 | Tax withholdingCommon Stock, par value $0.01 per share | 1,423 | $69.65 | $99,111.95 |
DisclosureSEC source: 0001057352-22-000110 · wf-form4_166492057035228.xml · nonDerivative · entry 1 DESMARAIS MICHAEL J · CIK 0001925959 · Chief Human Resources Officer 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 38,196 F1 · balance_after: Represents all shares of Common Stock owned, consisting of 4,153 shares of Common Stock and 30,471 shares of Common Stock subject to unvested Restricted Stock grants, 1,786 shares of Deferred Stock Units and 1,786 shares of unvested Restricted Stock Units. Read SEC document |
| August 03, 2022 Filed Aug 5, 2022 20:57 UTC | COSTAR GROUP, INC. CSGP · Entity 3416 | SaleCommon Stock, par value $0.01 per share | 2,000 | $72.51 | $145,020.00 |
DisclosureSEC source: 0001925959-22-000002 · wf-form4_165973300800637.xml · nonDerivative · entry 1 DESMARAIS MICHAEL J · CIK 0001925959 · Chief Human Resources Officer 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 39,619 F1 · price: Average based on sales prices ranging from $72.49 to $72.53. F2 · balance_after: Represents all shares of Common Stock owned, consisting of 1,296 shares of Common Stock and 34,751 shares of Common Stock subject to unvested Restricted Stock grants, 1,786 shares of Deferred Stock Units and 1,786 shares of unvested Restricted Stock Units. Read SEC document |
| May 02, 2022 Filed May 4, 2022 20:50 UTC | COSTAR GROUP, INC. CSGP · Entity 3416 | SaleCommon Stock, par value $0.01 per share | 1,000 | $63.14 | $63,140.00 |
DisclosureSEC source: 0001057352-22-000066 · wf-form4_165169731469350.xml · nonDerivative · entry 1 DESMARAIS MICHAEL J · CIK 0001925959 · Chief Human Resources Officer 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 41,619 F1 · balance_after: Represents all shares of Common Stock owned, consisting of 3,296 shares of Common Stock and 34,751 shares of Common Stock subject to unvested Restricted Stock grants, 1,786 shares of Deferred Stock Units and 1,786 shares of unvested Restricted Stock Units. 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.