CSGP SEC Filings: 8-K, 10-Q, S-3 & 424B – CoStar

Financials

TYPE

HEADLINE

FILED AT

10-Q

Form 10-Q - Quarterly report [Sections 13 or 15(d)]

Oct 28, 2026

10-Q

Form 10-Q - Quarterly report [Sections 13 or 15(d)]

Jul 29, 2026

10-Q

Form 10-Q - Quarterly report [Sections 13 or 15(d)]

Apr 29, 2026

10-K

Form 10-K - Annual report [Section 13 and 15(d), not S-K Item 405]

Feb 25, 2026

10-Q

Form 10-Q - Quarterly report [Sections 13 or 15(d)]

Oct 29, 2025

10-Q

Form 10-Q - Quarterly report [Sections 13 or 15(d)]

Jul 23, 2025

News

TYPE

HEADLINE

FILED AT

8-K

CoStar Group Reports Record Third Quarter 2026 Revenue and Profitability

Oct 27, 2026

8-K

CoStar Group, Inc. Completes Acquisition of Zonda

Aug 21, 2026

8-K

CoStar Group, Inc. Announces Financial and Operating Results for Second Quarter 2026

Jul 28, 2026

8-K

CoStar Group Appoints Robin Rossmann as Chief Financial Officer

Jul 13, 2026

8-K

CoStar Group, Inc. Announces Results of 2026 Annual Meeting of Stockholders

Jun 25, 2026

8-K

CoStar Group to Acquire Zonda for $800 Million

May 29, 2026

Prospectus

TYPE

HEADLINE

FILED AT

424B3

Form 424B3 - Prospectus [Rule 424(b)(3)]

Jun 10, 2024

425

Form 425 - Prospectuses and communications, business combinations

Apr 23, 2024

425

Form 425 - Prospectuses and communications, business combinations

Apr 23, 2024

425

Form 425 - Prospectuses and communications, business combinations

Apr 22, 2024

424B2

Common Stock

Sep 19, 2022

424B2

Common Stock

Sep 14, 2022

Registrations

TYPE

HEADLINE

FILED AT

S-8

Form S-8 - Securities to be offered to employees in employee benefit plans

Jul 29, 2026

S-8

Form S-8 - Securities to be offered to employees in employee benefit plans

Jul 23, 2025

S-8

Form S-8 - Securities to be offered to employees in employee benefit plans

Feb 28, 2025

S-4/A

Form S-4/A - Registration of securities, business combinations: [Amend]

Jun 7, 2024

S-4

What happens if I sell my shares of Matterport Common Stock before the First Effective Time? EFFECTIVE

May 20, 2024

FWP

CoStar Group, Inc. Announces Public Offering of Common Stock in

Sep 14, 2022

Proxies

TYPE

HEADLINE

FILED AT

DEFA14A

Form DEFA14A - Additional definitive proxy soliciting materials and Rule 14(a)(12) material

May 18, 2026

DEFA14A

Form DEFA14A - Additional definitive proxy soliciting materials and Rule 14(a)(12) material

Apr 30, 2026

DEF 14A

Form DEF 14A - Other definitive proxy statements

Apr 30, 2026

DEFA14A

Form DEFA14A - Additional definitive proxy soliciting materials and Rule 14(a)(12) material

Jun 13, 2025

DEFA14A

Form DEFA14A - Additional definitive proxy soliciting materials and Rule 14(a)(12) material

Apr 30, 2025

DEF 14A

Form DEF 14A - Other definitive proxy statements

Apr 30, 2025

Ownerships

TYPE

HEADLINE

FILED AT

Rossmann Robin Jack (Reporting)

Oct 16, 2026

SCHEDULE 13G

BAMCO INC /NY/ (Filed by)

Aug 14, 2026

Cann Cynthia Cammett (Reporting)

Aug 10, 2026

Hill John W (Reporting)

Aug 10, 2026

144

Form 144 - Report of proposed sale of securities

Aug 5, 2026

FLORANCE ANDREW C (Reporting)

Aug 5, 2026

Other

TYPE

HEADLINE

FILED AT

Form SD - Specialized disclosure report

May 20, 2026

EFFECT

Form EFFECT - Notice of Effectiveness

Jun 11, 2024

CORRESP

Form CORRESP - Correspondence

Jun 7, 2024

LETTER

Form UPLOAD - SEC-generated letter

May 30, 2024

LETTER

Form UPLOAD - SEC-generated letter

Sep 30, 2015

CORRESP

Form CORRESP - Correspondence

Jul 16, 2015

CoStar Group, Inc. CSGP · SEC Filings