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CoStar Group (CSGP) CFO Rossmann details stock and RSU holdings

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Form Type
3

Rhea-AI Filing Summary

CoStar Group, Inc. reports the initial equity holdings of Chief Financial Officer Robin Jack Rossmann. As of July 31, 2026, he directly owns 86,691 shares of common stock and 10,223 restricted stock units, each RSU representing one share. These RSUs vest in four equal installments on March 15, 2027, March 15, 2028, March 15, 2029 and March 15, 2030.

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Insider Rossmann Robin Jack
Role Chief Financial Officer
Type Security Shares Price Value
holding Restricted Stock Units F2, F1 -- -- --
holding Common Stock, par value $0.01 per share -- -- --
Holdings After Transaction: Restricted Stock Units — 10,223 shares (Direct); Common Stock, par value $0.01 per share — 86,691 shares (Direct)
Footnotes (2)
  1. F1. The restricted stock units vest in four equal installments on March 15, 2027, March 15, 2028, March 15, 2029, and March 15, 2030.
  2. F2. Each restricted stock unit represents a contingent right to receive one share of CoStar Group, Inc. common stock.
Direct common shares 86,691 shares Directly owned CoStar Group common stock as of July 31, 2026
Restricted stock units underlying shares 10,223 shares Underlying common shares for reported restricted stock units
RSU vesting installments 4 installments RSUs vest in four equal installments 2027–2030
RSU share ratio 1 share per unit Each restricted stock unit represents a contingent right to one share
Par value of common stock $0.01 per share Par value of CoStar Group, Inc. common stock
Reporting date July 31, 2026 Date of reported holdings for common stock and RSUs
Restricted Stock Units financial
"Security title reported as Restricted Stock Units for the CFO"
Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.
contingent right financial
"represents a contingent right to receive one share of CoStar Group"
par value financial
"Common Stock, par value $0.01 per share"
Par value is the fixed amount printed on a bond or stock that represents its original value when issued. It’s like the face value of a coin or bill—what the issuer promises to pay back or the starting price of a stock—though it often doesn’t change with market prices. It matters because it helps determine certain financial details, like how much the company will pay back at maturity.

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

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FAQ

What insider holdings does CoStar Group (CSGP) CFO Robin Jack Rossmann report?

Robin Jack Rossmann reports 86,691 shares of CoStar common stock and 10,223 restricted stock units. All holdings are listed as directly owned, reflecting his reported equity position in the company as of July 31, 2026.

How many CoStar Group (CSGP) restricted stock units does the CFO hold and what do they represent?

Rossmann holds 10,223 restricted stock units. Each restricted stock unit represents a contingent right to receive one share of CoStar Group, Inc. common stock, aligning his compensation with future company performance.

When do the CoStar Group (CSGP) RSUs held by CFO Rossmann vest?

The reported restricted stock units vest in four equal installments on March 15 of 2027, 2028, 2029 and 2030. This multi-year schedule spreads the potential share delivery over four consecutive years.

Are Robin Jack Rossmann’s CoStar Group (CSGP) holdings reported as direct or indirect ownership?

All reported positions, including 86,691 common shares and the RSUs, are listed as direct ownership. No indirect holdings through trusts or other entities are indicated in this report.

What security underlies the CoStar Group (CSGP) RSUs reported by the CFO?

The restricted stock units are based on CoStar Group common stock, par value $0.01 per share. Each RSU entitles the holder to receive one share of this common stock upon vesting.
SEC Form 3
FORM 3UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

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:3235-0104
Estimated average burden
hours per response:0.5
1. Name and Address of Reporting Person*
Rossmann Robin Jack

(Last)(First)(Middle)
C/O COSTAR GROUP, INC.
1201 WILSON BLVD.

(Street)
ARLINGTON VIRGINIA 22209

(City)(State)(Zip)

UNITED STATES

(Country)
2. Date of Event Requiring Statement (Month/Day/Year)
07/31/2026
3. Issuer Name and Ticker or Trading Symbol
COSTAR GROUP, INC. [ CSGP ]
3a. Foreign Trading Symbol
5. If Amendment, Date of Original Filed (Month/Day/Year)
4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
Director10% Owner
XOfficer (give title below)Other (specify below)
Chief Financial Officer
6. Individual or Joint/Group Filing (Check Applicable Line)
XForm filed by One Reporting Person
Form filed by More than One Reporting Person
Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4) 2. Amount of Securities Beneficially Owned (Instr. 4) 3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 4. Nature of Indirect Beneficial Ownership (Instr. 5)
Common Stock, par value $0.01 per share86,691D
Table II - Derivative Securities Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4) 2. Date Exercisable and Expiration Date (Month/Day/Year)3. Title and Amount of Securities Underlying Derivative Security (Instr. 4) 4. Conversion or Exercise Price of Derivative Security 5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 6. Nature of Indirect Beneficial Ownership (Instr. 5)
Date ExercisableExpiration DateTitleAmount or Number of Shares
Restricted Stock Units (1) (1)Common Stock, par value $0.01 per share10,223(2)D
Explanation of Responses:
1. The restricted stock units vest in four equal installments on March 15, 2027, March 15, 2028, March 15, 2029, and March 15, 2030.
2. Each restricted stock unit represents a contingent right to receive one share of CoStar Group, Inc. common stock.
Remarks:
Exhibit 24 - Power of Attorney
/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 5 (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 3: SEC 1473 (03-26)