CoStar director granted 8,262 restricted shares

Brunner Angelique G. reported acquisition or exercise transactions in this Form 4 filing.

Rhea-AI Filing Summary

Brunner Angelique G. reported acquisition or exercise transactions in this Form 4 filing.

CoStar Group director Angelique G. Brunner received an equity grant of 8,262 shares of restricted common stock on June 23, 2026. The award carries no purchase price and represents stock-based compensation rather than an open-market transaction. The restricted shares vest in full on the earlier of the first anniversary of the grant date or the company’s 2027 Annual Meeting of Stockholders. Following this grant, Brunner directly holds 18,428 shares of CoStar Group common stock.

Insider Trade Summary

Grant/Award: 8,262 shares

Grant/Award 1 txn

Insider Brunner Angelique G.

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 — 18,428 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 granted: 8,262 shares Grant price: $0.00 per share Shares held after grant: 18,428 shares +2 more

5 metrics

Restricted stock granted 8,262 shares Award of common stock on June 23, 2026

Grant price $0.00 per share Compensation grant, not open-market purchase

Shares held after grant 18,428 shares Total direct holdings following the transaction

Vesting trigger First anniversary of grant Award vests on earlier of this date or 2027 annual meeting

Alternative vesting date 2027 Annual Meeting Full vesting occurs if this meeting precedes first anniversary

Key Terms

restricted stock award, grant date, Annual Meeting of Stockholders

3 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.

grant date financial

"earlier of either the first anniversary of the grant date or the date"

The grant date is the day a company formally gives an employee or contractor the right to receive stock-based compensation, such as stock options or restricted shares. It matters to investors because it fixes key terms—like the price, the start of the ownership clock, and when the award will affect the company’s financial statements and share count—so it can influence dilution, reported expenses, and potential future selling pressure.

Annual Meeting of Stockholders financial

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

FAQ

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

What did CoStar Group (CSGP) director Angelique Brunner report in this Form 4?

Angelique G. Brunner reported receiving 8,262 shares of CoStar Group common stock as a restricted stock award. This was a compensation grant at no cost, increasing her direct holdings to 18,428 shares following the transaction.

Is Angelique Brunner’s CoStar (CSGP) Form 4 transaction a stock purchase or a grant?

The transaction is a grant of restricted stock, not an open-market purchase. Brunner received 8,262 shares at a stated price of $0.00 per share as a compensation award, reflecting equity-based remuneration rather than a cash investment.

How many CoStar Group (CSGP) shares does Angelique Brunner hold after this award?

After the restricted stock award, Angelique G. Brunner directly holds 18,428 shares of CoStar Group common stock. This total includes the 8,262 newly granted restricted shares, which vest later based on the schedule described in the Form 4 footnote.

When do Angelique Brunner’s newly granted CoStar (CSGP) restricted shares vest?

The restricted stock award vests in full on the earlier of two dates: the first anniversary of the June 23, 2026 grant date, or the date of CoStar Group’s 2027 Annual Meeting of Stockholders, according to the vesting footnote in the filing.

Does the CoStar (CSGP) Form 4 indicate any stock sales by Angelique Brunner?

The Form 4 does not report any sales by Angelique G. Brunner. It shows only a single acquisition transaction coded as a grant or award of 8,262 restricted shares, with no corresponding dispositions or open-market sales disclosed.

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

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Accepted by SEC EDGAR 06/24/2026 - 09:13 PM EDT 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^*

Brunner Angelique G.

(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	18,428	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)