CoStar director granted 8,262 restricted shares

Hill John W reported acquisition or exercise transactions in this Form 4 filing.

Rhea-AI Filing Summary

Hill John W reported acquisition or exercise transactions in this Form 4 filing.

CoStar Group director John W. Hill received a grant of 8,262 shares of common stock as an equity award. The award was granted at no cash cost per share and is structured as restricted stock. Following this grant, Hill directly holds 26,493 shares.

The restricted stock award will vest in full on the earlier of the first anniversary of the grant date or the date of CoStar Group’s 2027 Annual Meeting of Stockholders. This is a compensation-related equity grant, not an open-market stock purchase or sale.

Insider Trade Summary

Grant/Award: 8,262 shares

Grant/Award 1 txn

Insider Hill John W

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Common Stock, par value $0.01 per share	8,262	$0.00	$0.00

Holdings After Transaction: Common Stock, par value $0.01 per share — 26,493 shares (Direct)

Footnotes (1)

1. F1. 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.

Key Figures

Restricted stock grant: 8,262 shares Grant price: $0.00 per share Post-transaction holdings: 26,493 shares +1 more

4 metrics

Restricted stock grant 8,262 shares Equity award to director John W. Hill on June 23, 2026

Grant price $0.00 per share Stated transaction price for restricted stock award

Post-transaction holdings 26,493 shares John W. Hill’s direct CoStar common stock holdings after grant

Vesting trigger Earlier of first anniversary or 2027 meeting Award vests by 2027 Annual Meeting of Stockholders or first grant anniversary

Key Terms

restricted stock award, vests in full, Annual Meeting of Stockholders, grant, award, or other acquisition

4 terms

restricted stock award financial

"The restricted stock award vests in full on the earlier of either the first anniversary..."

A restricted stock award is company shares given to an employee or executive that cannot be sold or fully owned until certain conditions—like staying with the company for a set time or hitting performance targets—are met. Think of it as a gift that only becomes yours after you fulfill specific obligations; for investors, these awards matter because they can increase the total shares outstanding when they vest, reveal how management is being paid and motivated, and create potential selling pressure when restrictions lift.

vests in full financial

"The restricted stock award vests in full on the earlier of either the first anniversary..."

Annual Meeting of Stockholders financial

"..., or the date of the Company's 2027 Annual Meeting of Stockholders."

grant, award, or other acquisition financial

"transaction_code_description": "Grant, award, or other acquisition""

FAQ

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

What insider transaction did CoStar Group (CSGP) report for John W. Hill?

CoStar Group reported that director John W. Hill received a grant of 8,262 shares of common stock. This is a restricted stock award given as compensation rather than an open-market purchase or sale of shares.

At what price were John W. Hill’s CoStar (CSGP) shares granted?

The 8,262 CoStar shares were granted to John W. Hill at a stated price of $0.00 per share. This indicates a compensation-related restricted stock award, not a market transaction involving cash paid by the director for the shares.

How many CoStar (CSGP) shares does John W. Hill own after this grant?

After receiving the 8,262-share restricted stock award, John W. Hill directly holds a total of 26,493 CoStar Group common shares. This figure reflects his position immediately following the reported Form 4 equity compensation transaction.

When do John W. Hill’s new CoStar (CSGP) restricted shares vest?

The restricted stock award vests in full on the earlier of the first anniversary of the grant date or CoStar Group’s 2027 Annual Meeting of Stockholders. Until vesting, the shares are subject to the award’s restrictions and conditions.

Is John W. Hill’s CoStar (CSGP) transaction a stock purchase or sale?

The transaction is an acquisition of shares through a restricted stock grant, not an open-market purchase or sale. It is categorized as a grant or award acquisition and reflects equity-based director compensation rather than trading activity.

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

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Accepted by SEC EDGAR 06/24/2026 - 09:13 PM Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Hill John W

(Last) (First) (Middle)

C/O COSTAR GROUP, INC.

1201 WILSON BLVD.

(Street)

ARLINGTON VIRGINIA 22209

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
COSTAR GROUP, INC. [ CSGP ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
06/23/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock, par value $0.01 per share	06/23/2026		A		8,262(1)	A	$0	26,493	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. 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.

Remarks:

	/s/ Gene Boxer, Attorney-in-Fact	06/24/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)