CoStar Group (CSGP) marketplaces president awarded 39,652 restricted stock units

Rhea-AI Filing Summary

SAINT FREDERICK G. reported acquisition or exercise transactions in this Form 4 filing.

CoStar Group reported that Frederick G. Saint, President, Marketplaces, received a grant of 39,652 restricted stock units. Each unit represents a contingent right to receive one share of CoStar Group common stock. The units vest in three equal installments on March 1, 2027, March 1, 2028, and March 1, 2029.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider SAINT FREDERICK G.

Role President, Marketplaces

Type	Security	Shares	Price	Value
Grant/Award	Restricted Stock Units	39,652	$0.00	--

Holdings After Transaction: Restricted Stock Units — 39,652 shares (Direct)

Footnotes (1)

1. Each restricted stock unit represents a contingent right to receive one share of CoStar Group, Inc. common stock. The restricted stock units vest in three equal installments on March 1, 2027, March 1, 2028 and March 1, 2029.

Form 4 Insider Transactions: What Each Field Means →

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^*

SAINT FREDERICK G.

(Last) (First) (Middle)

C/O COSTAR GROUP, INC.

1201 WILSON BLVD.

(Street)

ARLINGTON VA 22209

(City) (State) (Zip)

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

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

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

3. Date of Earliest Transaction (Month/Day/Year)
02/27/2026

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

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

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

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

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
Restricted Stock Units	(1)	02/27/2026		A		39,652		(2)	(2)	Common Stock, par value $0.01 per share	39,652	$0	39,652	D

Explanation of Responses:

1. Each restricted stock unit represents a contingent right to receive one share of CoStar Group, Inc. common stock.

2. The restricted stock units vest in three equal installments on March 1, 2027, March 1, 2028 and March 1, 2029.

Remarks:

	/s/ Gene Boxer, Attorney-in-Fact	03/03/2026
	** 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.

FAQ

What insider transaction did CoStar Group (CSGP) report for Frederick G. Saint?

CoStar Group reported that Frederick G. Saint received a grant of 39,652 restricted stock units. These units are part of his equity compensation and give him the contingent right to receive an equal number of CoStar common shares if they vest.

How many restricted stock units were granted to the CoStar Group (CSGP) executive?

Frederick G. Saint was granted 39,652 restricted stock units. Each unit is linked to one share of CoStar Group common stock, aligning his potential future compensation with the company’s share performance over several years as the units vest.

When do Frederick G. Saint’s CoStar Group (CSGP) restricted stock units vest?

The restricted stock units vest in three equal installments on March 1, 2027, March 1, 2028, and March 1, 2029. This multi-year vesting schedule encourages long-term alignment between the executive’s interests and CoStar Group shareholders.

What does each restricted stock unit represent in the CoStar Group (CSGP) Form 4?

Each restricted stock unit represents a contingent right to receive one share of CoStar Group common stock. The units only convert into actual shares if the vesting conditions are satisfied on the specified future vesting dates.

Was the CoStar Group (CSGP) insider transaction a purchase or a grant?

The transaction was a grant or award acquisition of restricted stock units, not an open-market purchase. CoStar granted 39,652 RSUs to Frederick G. Saint as part of his compensation, with no cash price per unit reported in the filing.

How many CoStar Group (CSGP) restricted stock units does Frederick G. Saint hold after this grant?

After this award, Frederick G. Saint is reported as holding 39,652 restricted stock units. This total reflects his derivative position in RSUs following the grant disclosed in the Form 4, all held under direct ownership according to the filing.