CoStar Group holder plans sale of 3,500 shares

CoStar Group (CSGP) has a notice of proposed sale covering up to 3,500 shares of common stock, with an aggregate market value of $106,067.50, to be sold through Ameritas Investment Corp on or after August 5, 2026 on NASDAQ.

Rhea-AI Filing Summary

CoStar Group (CSGP) has a notice of proposed sale covering up to 3,500 shares of common stock, with an aggregate market value of $106,067.50, to be sold through Ameritas Investment Corp on or after August 5, 2026 on NASDAQ.

The shares relate to stock issued as payment for services rendered on several dates, including 989 shares on November 1, 2025, 25 shares on September 15, 2025, 922 shares on August 1, 2025, 617 shares on September 15, 2024, and 947 shares on September 14, 2015, all classified as compensation common stock.

Key Figures

Shares proposed for sale: 3,500 shares Aggregate market value: $106,067.50 Compensation grant: 989 shares +4 more

7 metrics

Shares proposed for sale 3,500 shares Common stock to be sold through Ameritas Investment Corp on or after August 5, 2026

Aggregate market value $106,067.50 Market value of the 3,500 CoStar Group common shares covered by the notice

Compensation grant 989 shares Compensation common stock issued as payment for services on November 1, 2025

Compensation grant 25 shares Compensation common stock issued as payment for services on September 15, 2025

Compensation grant 922 shares Compensation common stock issued as payment for services on August 1, 2025

Compensation grant 617 shares Compensation common stock issued as payment for services on September 15, 2024

Compensation grant 947 shares Compensation common stock issued as payment for services on September 14, 2015

Key Terms

Form 144, compensation common stock, Payment for services rendered

3 terms

Form 144 regulatory

"144: Securities Information Common Stock"

Form 144 is a document that investors must file with the government when they plan to sell a large number of shares of a company's stock. It helps ensure transparency so everyone knows how many shares are being sold and when, which can impact the stock's price.

compensation common stock financial

"09/15/2025 | Payment for services rendered | Costar | | | 25 | 09/15/2025 | Compensation"

Payment for services rendered financial

"Common Stock | 11/01/2025 | Payment for services rendered | Costar"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What does the Form 144 filing for CoStar Group (CSGP) disclose?

The filing discloses a proposed sale of up to 3,500 shares of CoStar Group common stock, with an aggregate market value of $106,067.50, to be sold through Ameritas Investment Corp on or after August 5, 2026 on NASDAQ.

How many CoStar Group (CSGP) shares are planned for sale and what is their value?

The planned sale covers 3,500 shares of CoStar Group common stock with an aggregate market value of $106,067.50. These shares are proposed to be sold on or after August 5, 2026 through Ameritas Investment Corp on NASDAQ.

What is the origin of the CoStar Group (CSGP) shares covered by this Form 144?

The shares were issued as payment for services rendered on multiple dates, including 989 shares (11/01/2025), 25 shares (09/15/2025), 922 shares (08/01/2025), 617 shares (09/15/2024), and 947 shares (09/14/2015), all designated compensation common stock.

When may the proposed sale of CoStar Group (CSGP) shares occur under this Form 144?

The proposed sale may occur on or after August 5, 2026. The Form 144 lists this as the date associated with the planned disposition of 3,500 CoStar Group common shares via Ameritas Investment Corp on NASDAQ.

Through which broker will the CoStar Group (CSGP) shares be sold under this notice?

The proposed sale is to be executed through Ameritas Investment Corp, located at 5900 O Street, Lincoln, NE 68501. The filing ties this broker to the planned sale of 3,500 CoStar Group common shares on NASDAQ.

What type of consideration led to the issuance of these CoStar Group (CSGP) shares?

The shares were issued as compensation common stock for payment for services rendered, with individual issuances of 989, 25, 922, 617, and 947 shares across dates from 2015 to 2025.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 08/05/2026 - 01:59 PM Accepted by SEC EDGAR 08/05/2026 - 01:58 PM Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001351689
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	COSTAR GROUP, INC.
SEC File Number	000-24531
Address of Issuer	1201 WILSON BLVD. ARLINGTON VIRGINIA 22209
Phone	2023466500
Name of Person for Whose Account the Securities are To Be Sold	Hill John W
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Director

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common Stock	Ameritas Investment Corp 5900 O Street Lincoln NE 68501	3500	106067.50	405197588	08/05/2026	NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common Stock	11/01/2025	Payment for services rendered	Costar			989	11/01/2025	Compensation
Common Stock	09/15/2025	Payment for services rendered	Costar			25	09/15/2025	Compensation
Common Stock	08/01/2025	Payment for services rendered	Costar			922	08/01/2025	Compensation
Common Stock	09/15/2024	Payment for services rendered	Costar			617	09/15/2024	Compensation
Common Stock	09/14/2015	Payment for services rendered	Costar			947	09/14/2015	Compensation

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Nothing to Report

144: Remarks and Signature

Remarks
Date of Notice	08/05/2026
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/ Audrey Skillern as a duly authorized representative of National Financial Services LLC, as attorney-in-fact for John W Hill
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)