STOCK TITAN

CoStar Group (CSGP) exec withholds 1,436 shares, retains 278,415

(Neutral)
(Neutral)
Form Type
4

Rhea-AI Filing Summary

COSTAR GROUP, INC. executive SAINT FREDERICK G., President, Marketplaces, disposed of 1,436 shares of common stock on August 1, 2026. The shares were delivered or withheld to satisfy an exercise price or tax liability at $28.76 per share. After this transaction, he directly holds 278,415 shares of CoStar common stock.

Positive

  • None.

Negative

  • None.
Insider SAINT FREDERICK G.
Role President, Marketplaces
Type Security Shares Price Value
Exercise Price or Tax Liability Common Stock, par value $0.01 per share 1,436 $28.76 $41K
Holdings After Transaction: Common Stock, par value $0.01 per share — 278,415 shares (Direct)
Shares disposed 1,436 shares Common stock delivered or withheld on August 1, 2026 to satisfy exercise price or tax liability
Per-share value $28.76 per share Value applied to the 1,436 shares used for exercise price or tax liability
Shares held after transaction 278,415 shares Directly owned CoStar common shares following the August 1, 2026 disposition
Payment of exercise price or tax liability by delivering or withholding securities financial
"Transaction code description: Payment of exercise price or tax liability by delivering or withholding securities"
exercise price financial
"Payment of exercise price or tax liability by delivering or withholding securities"
The exercise price is the fixed amount at which you can buy or sell an asset, like a stock, when using an options contract. It matters because it helps determine whether exercising the option will be profitable or not, depending on the current market price. Think of it as the set price you agree on today to buy or sell later.
withholding securities financial
"Payment of exercise price or tax liability by delivering or withholding securities"

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FAQ

What insider transaction did SAINT FREDERICK G. report for CSGP?

SAINT FREDERICK G., President, Marketplaces at CoStar Group, disposed of 1,436 shares of common stock on August 1, 2026. The shares were delivered or withheld to satisfy an exercise price or tax liability at $28.76 per share, leaving him with 278,415 shares held directly.

How many CoStar Group (CSGP) shares does SAINT FREDERICK G. hold after this transaction?

After the reported disposition, SAINT FREDERICK G. directly holds 278,415 shares of CoStar Group common stock. This figure reflects his position immediately following the use of 1,436 shares to satisfy an exercise price or tax liability under the company’s equity arrangements.

What price per share was used in the latest CSGP insider share disposition?

The disposition used a value of $28.76 per share for the 1,436 shares delivered or withheld. This per-share amount applies to common stock with a par value of $0.01 and is tied to satisfying an exercise price or tax liability obligation.

Was the CSGP insider transaction by SAINT FREDERICK G. a market sale?

The reported transaction was not a market sale; it was a disposition coded as F, meaning shares were delivered or withheld to pay an exercise price or tax liability. The reporting person retained 278,415 shares of CoStar common stock directly afterward.

Was the CSGP insider transaction made under a Rule 10b5-1 trading plan?

The transaction was not affirmed as being made under a Rule 10b5-1 trading plan. The specific checkbox associated with Rule 10b5-1 trading plans was left unchecked, indicating no representation that this disposition occurred pursuant to such a pre-arranged plan.
SEC Form 4
FORM 4UNITED 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 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)
Director10% Owner
XOfficer (give title below)Other (specify below)
President, Marketplaces
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
08/01/2026
6. Individual or Joint/Group Filing (Check Applicable Line)
XForm 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)
CodeVAmount(A) or (D)Price
Common Stock, par value $0.01 per share08/01/2026F1,436D$28.76278,415D
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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Explanation of Responses:
Remarks:
/s/ Gene Boxer, Attorney-in-Fact08/04/2026
** Signature of Reporting PersonDate
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)