SEC registrant: COSTAR GROUP, INC., CIK 1057352. Common stock (inferred from the name, not yet reviewed). Issuer name and CIK from the SEC company list fetched 2026-09-05; the ticker match itself uses the exchange lists described on the methodology page.
Filed as: COSTAR GROUP INC; COSTAR GROUP INC UNSOLICITED; CoStar Group, Inc. (CSGP).
| Date | Official | As filed | Type | Amount | Verification |
|---|---|---|---|---|---|
| June 24, 2026 | Donald J. Trump President of the United States | COSTAR GROUP INC filing | Sale | $50K-$100K | CheckedThe PDF parser could not read this filing reliably, so two AI models from different companies read it and agreed. A page check confirmed this row. |
| June 23, 2026 | Donald J. Trump President of the United States | COSTAR GROUP INC filing | Sale | $1K-$15K | CheckedAn OCR program and an AI model each read this row and agreed. A page check confirmed this row. |
| June 18, 2026 | Donald J. Trump President of the United States | COSTAR GROUP INC filing | Sale | $100K-$250K | CheckedAn OCR program and an AI model each read this row and agreed. A page check confirmed this row. |
| June 3, 2026 | Donald J. Trump President of the United States | COSTAR GROUP INC filing | Purchase | $1K-$15K | CheckedAn OCR program and an AI model each read this row and agreed. A page check confirmed this row. |
| May 22, 2026 | Donald J. Trump President of the United States | COSTAR GROUP INC filing | Purchase | $50K-$100K | CheckedAn OCR program and an AI model each read this row and agreed. A page check confirmed this row. |
| May 18, 2026 | Donald J. Trump President of the United States | COSTAR GROUP INC filing | Purchase | $1K-$15K | CheckedAn OCR program and an AI model each read this row and agreed. A page check confirmed this row. |
| April 28, 2026 | Donald J. Trump President of the United States | COSTAR GROUP INC filing | Sale | $1K-$15K | CheckedAn OCR program and an AI model each read this row and agreed. A page check confirmed this row. |
| April 20, 2026 | Donald J. Trump President of the United States | COSTAR GROUP INC filing | Sale | $50K-$100K | CheckedAn OCR program and an AI model each read this row and agreed. A page check confirmed this row. |
| April 17, 2026 | Donald J. Trump President of the United States | COSTAR GROUP INC filing | Purchase | $100K-$250K | CheckedAn OCR program and an AI model each read this row and agreed. A page check confirmed this row. |
| April 17, 2026 | Donald J. Trump President of the United States | COSTAR GROUP INC filing | Sale | $1K-$15K | CheckedAn OCR program and an AI model each read this row and agreed. A page check confirmed this row. |
| March 26, 2026 | Donald J. Trump President of the United States | COSTAR GROUP INC filing | Purchase | $1K-$15K | CheckedThe PDF parser could not read this filing reliably, so two AI models from different companies read it and agreed. A page check confirmed this row. |
| March 23, 2026 | Donald J. Trump President of the United States | COSTAR GROUP INC UNSOLICITED filing | Purchase | $15K-$50K | CheckedThe PDF parser could not read this filing reliably, so two AI models from different companies read it and agreed. A page check confirmed this row. |
| March 18, 2026 | Donald J. Trump President of the United States | COSTAR GROUP INC filing | Purchase | $50K-$100K | CheckedAn OCR program and an AI model each read this row and agreed. A page check confirmed this row. |
| Feb. 23, 2026 | Donald J. Trump President of the United States | COSTAR GROUP INC filing | Sale | $1K-$15K | CheckedAn OCR program and an AI model each read this row and agreed. A page check confirmed this row. |
| Feb. 12, 2026 | Donald J. Trump President of the United States | COSTAR GROUP INC filing | Purchase | $1K-$15K | CheckedThe PDF parser could not read this filing reliably, so two AI models from different companies read it and agreed. A page check confirmed this row. |
| Feb. 12, 2026 | Donald J. Trump President of the United States | COSTAR GROUP INC filing | Sale | $50K-$100K | CheckedThe PDF parser could not read this filing reliably, so two AI models from different companies read it and agreed. A page check confirmed this row. |
| Feb. 10, 2026 | Donald J. Trump President of the United States | COSTAR GROUP INC filing | Sale | $50K-$100K | CheckedThe PDF parser could not read this filing reliably, so two AI models from different companies read it and agreed. A page check confirmed this row. |
| Jan. 30, 2026 | Arjun Mody Deputy Commissioner, Social Security Administration | CoStar Group, Inc. (CSGP) filing | Sale | $1K-$15K | CheckedThe PDF parser could not read this filing reliably, so two AI models from different companies read it and agreed. A page check confirmed this row. |
| Jan. 12, 2026 | Donald J. Trump President of the United States | COSTAR GROUP INC filing | Purchase | $50K-$100K | CheckedThe PDF parser could not read this filing reliably, so two AI models from different companies read it and agreed. A page check confirmed this row. |
| Jan. 12, 2026 | Donald J. Trump President of the United States | COSTAR GROUP INC filing | Sale | $1K-$15K | CheckedAn OCR program and an AI model each read this row and agreed. A page check confirmed this row. |
Source: U.S. Office of Government Ethics. Values reported in ranges per federal law. A trade is listed here only when its printed name was read the same way by two independent readers and matched this security exactly, by symbol or by name on two reference lists, or a person confirmed it. Broker abbreviations still under review are not listed; the trades stay on the official’s page under the printed name.