Screener / SEC EDGAR /CIK 0001057352 /10-K filed Feb 26, 2026, compared with Feb 20, 2025 /Numbers from the XBRL of the 10-Ks

Nasdaq Real estate · Business Services

CoStar Group CSGP

New risk paragraphs 22 Not in last year's 10-K Accounting checks 1 worth reading about, of 10 checks Insider buys 0 open-market, last 90 days Filings 3 in the last 30 days

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Filings with the SEC since Jun 3, 2011

1,006 filings, 7 in the last 30 days

SEC filing index

Latest annual report Feb 26, 2026 10-K, period to Dec 31, 2025 Latest quarterly report Oct 28, 2026 10-Q, period to Sep 30, 2026 Latest current report Oct 27, 2026 8-K: Material agreement signed, Quarterly results, Regulation FD disclosure

Filed in the last 30 days 7 of 1,006 in all

What the 8-Ks said

2 events in the last 3 years: the officer, auditor, restatement, cyber, restructuring, listing, impairment and debt items. One line each, the filing's own words.

CEO, CFO, COO or CAO: 2 (item 5.02)Auditor change: 0 (item 4.01)Not to be relied on: 0 (item 4.02)Cybersecurity: 0 (item 1.05)Restructuring: 0 (item 2.05)Listing notice: 0 (item 3.01)Impairment: 0 (item 2.06)Debt trigger: 0 (item 2.04)

Jul 13, 2026 CEO, CFO, COO or CAOCFO change “(the “Company” or “CoStar Group”) appointed Robin Rossmann to serve as the Company’s Chief Financial Officer, effective July 31, 2026 (“Effective Date”).” 8-K item 5.02 · all documents
Feb 20, 2024 CEO, CFO, COO or CAOCFO change “On February 20, 2024, Scott Wheeler notified the Company of his intention to retire from his position as Chief Financial Officer.” 8-K item 5.02 · all documents

From the SEC filing index and the text of each 8-K. A line appears only when the 8-K names one of these items; for item 5.02 only a move of the CEO, CFO, COO or chief accounting officer. Older 8-Ks may have no text downloaded, so they show no quote.

Late filings, 8-K notices and going concern

None found in the last 2 years

All checks

Late filing notices (NT 10-K, NT 10-Q)

No notice in the last 2 years.
8-K notices: listing, impairment, debt trigger

No item 3.01, 2.06 or 2.04 in the last 2 years.
Going-concern language in the 10-K

No statement of substantial doubt in the latest 10-K.

Source: 10-K 0001057352-26-000020 (filed Feb 26, 2026): full text searched

Facts to read in the filing, not a verdict: many companies with one of these carry on normally, and a company with neither can still have problems.

Every filing on one line

Each mark is a filing or an event in one; the bigger square is a 10-K. Hover for what it is, click to open it.

Annual report (10-K)Quarterly report (10-Q)Current report (8-K)Auditor changeCEO, CFO, COO or CAO changeRestatementLate filing noticeInsider purchaseCluster buy (3+ insiders)SEC comment letterShare offering (S-3, 424B)Planned insider sale (Form 144, 10b5-1)

20252026

All 35 events

Nov 12, 2026 Planned sale Hill John W (Director) gave notice of a planned sale of 3,050 shares worth about $93KForm 144, approximate sale date Nov 12, 2026
Oct 28, 2026 10-Q Quarterly report (10-Q)period ended Sep 30, 2026
Oct 27, 2026 8-K Material agreement signed, Quarterly results, Regulation FD disclosure8-K items 1.01, 2.02, 7.01
Aug 21, 2026 8-K Regulation FD disclosure8-K item 7.01
Aug 5, 2026 Buy FLORANCE ANDREW C (Founder and CEO) bought $2.5Mopen-market purchase on Aug 4, 2026
Aug 5, 2026 Planned sale Hill John W (Director) gave notice of a planned sale of 3,500 shares worth about $106KForm 144, approximate sale date Aug 5, 2026
Jul 29, 2026 10-Q Quarterly report (10-Q)period ended Jun 30, 2026
Jul 28, 2026 8-K Quarterly results8-K item 2.02
Jul 13, 2026 Officer CFO change(the “Company” or “CoStar Group”) appointed Robin Rossmann to serve as the Company’s Chief Financial Officer, effective July 31, 2026 (“Effective Date”).
Jun 25, 2026 8-K Director or officer change, Shareholder vote results, Regulation FD disclosure8-K items 5.02, 5.07, 7.01
May 29, 2026 8-K Material agreement signed, Regulation FD disclosure8-K items 1.01, 7.01
May 4, 2026 Buy FLORANCE ANDREW C (President and CEO) bought $2.5Mopen-market purchase on May 1, 2026
Apr 29, 2026 10-Q Quarterly report (10-Q)period ended Mar 31, 2026
Apr 28, 2026 8-K Quarterly results, Regulation FD disclosure8-K items 2.02, 7.01
Mar 16, 2026 8-K Director or officer change, Regulation FD disclosure8-K items 5.02, 7.01
Feb 26, 2026 Planned sale Cynthia Cann (Chief Accounting Officer) adopted a 10b5-1 trading planreported in the 10-K, up to 3,986 shares, runs to Jul 31, 2026
Feb 26, 2026 Planned sale Michael Desmarais (Chief Human Resources Officer) adopted a 10b5-1 trading planreported in the 10-K, up to 5,000 shares, runs to Jul 31, 2026
Feb 26, 2026 10-K Annual report (10-K)period ended Dec 31, 2025
Feb 24, 2026 8-K Quarterly results, Regulation FD disclosure8-K items 2.02, 7.01
Feb 13, 2026 8-K Director or officer change8-K item 5.02
Jan 7, 2026 8-K Director or officer change, Regulation FD disclosure8-K items 5.02, 7.01
Nov 13, 2025 Planned sale Hill John W (Director, Member of immediate family of any of the foregoing) gave notice of a planned sale of 2,250 shares worth about $152KForm 144, approximate sale date Nov 13, 2025
Oct 29, 2025 10-Q Quarterly report (10-Q)period ended Sep 30, 2025
Oct 28, 2025 8-K Quarterly results, Regulation FD disclosure8-K items 2.02, 7.01
Aug 27, 2025 8-K Regulation FD disclosure8-K item 7.01
Jul 23, 2025 10-Q Quarterly report (10-Q)period ended Jun 30, 2025
Jul 22, 2025 8-K Quarterly results, Regulation FD disclosure8-K items 2.02, 7.01
Jun 27, 2025 8-K Director or officer change, Shareholder vote results8-K items 5.02, 5.07
May 9, 2025 8-K Material agreement signed, Regulation FD disclosure8-K items 1.01, 7.01
May 1, 2025 10-Q Quarterly report (10-Q)period ended Mar 31, 2025
Apr 29, 2025 8-K Quarterly results8-K item 2.02
Apr 7, 2025 8-K Material agreement signed, Director or officer change, Regulation FD disclosure8-K items 1.01, 5.02, 7.01
Feb 28, 2025 8-K Acquisition or sale of assets completed, Regulation FD disclosure8-K items 2.01, 7.01
Feb 20, 2025 10-K Annual report (10-K)period ended Dec 31, 2024
Feb 18, 2025 8-K Quarterly results, Regulation FD disclosure8-K items 2.02, 7.01

From the SEC filing index. Insider purchases go back 180 days (the Form 4s downloaded).

Every filing

Newest first, by kind · each form links to sec.gov

Filed	Form	What it is	Period
Feb 26, 2018	S-8	Shares registered for employee plans		all files
Feb 23, 2018	10-K	Annual report	Dec 31, 2017	all files · tables
Feb 21, 2018	8-K	Quarterly results, Unregistered share sale, Other events	Feb 21, 2018	all files
Feb 14, 2018	SC 13G/A	5%+ owner (passive), amended		all files
Feb 14, 2018	SC 13G	5%+ owner (passive)		all files
Feb 14, 2018	SC 13G	5%+ owner (passive)		all files
Feb 13, 2018	SC 13G	5%+ owner (passive)		all files
Feb 13, 2018	SC 13G/A	5%+ owner (passive), amended		all files
Feb 9, 2018	SC 13G/A	5%+ owner (passive), amended		all files
Feb 8, 2018	SC 13G	5%+ owner (passive)		all files
Jan 17, 2018	8-K	Regulation FD disclosure	Jan 17, 2018	all files
Jan 12, 2018	4	Insider trade	Jan 11, 2018	all files
Jan 3, 2018	4	Insider trade	Dec 31, 2017	all files
Nov 28, 2017	8-K	Other events	Nov 24, 2017	all files
Oct 26, 2017	10-Q	Quarterly report	Sep 30, 2017	all files · tables
Oct 25, 2017	8-K	Material agreement signed, Quarterly results, New debt or obligation, Other events	Oct 25, 2017	all files
Oct 3, 2017	8-K	Other events	Oct 3, 2017	all files
Sep 29, 2017	424B2	Prospectus (notes)		all files
Sep 25, 2017	424B2	Prospectus (notes)		all files
Sep 25, 2017	S-3ASR	Shelf registration		all files
Sep 19, 2017	3	New insider	Sep 13, 2017	all files
Sep 14, 2017	4	Insider trade	Sep 13, 2017	all files
Sep 14, 2017	4	Insider trade	Sep 13, 2017	all files
Sep 14, 2017	4	Insider trade	Sep 13, 2017	all files
Sep 14, 2017	4	Insider trade	Sep 13, 2017	all files
Sep 14, 2017	4	Insider trade	Sep 13, 2017	all files
Sep 14, 2017	4	Insider trade	Sep 13, 2017	all files
Sep 14, 2017	4	Insider trade	Sep 13, 2017	all files
Sep 13, 2017	8-K	Material agreement signed, Regulation FD disclosure	Sep 12, 2017	all files
Sep 12, 2017	4	Insider trade	Sep 11, 2017	all files
Sep 12, 2017	4	Insider trade	Sep 9, 2017	all files
Aug 1, 2017	4	Insider trade	Jul 31, 2017	all files
Jul 27, 2017	10-Q	Quarterly report	Jun 30, 2017	all files · tables
Jul 26, 2017	8-K	Quarterly results	Jul 26, 2017	all files
Jun 27, 2017	4	Insider trade	Jun 26, 2017	all files
Jun 7, 2017	8-K	Shareholder vote results	Jun 6, 2017	all files
May 3, 2017	4	Insider trade	May 2, 2017	all files
May 3, 2017	4	Insider trade	May 1, 2017	all files
May 3, 2017	4	Insider trade	May 1, 2017	all files
May 3, 2017	4	Insider trade	May 2, 2017	all files
May 3, 2017	4	Insider trade	May 2, 2017	all files
Apr 27, 2017	10-Q	Quarterly report	Mar 31, 2017	all files · tables
Apr 27, 2017	8-K	Quarterly results	Apr 26, 2017	all files
Apr 24, 2017	DEFA14A	Extra proxy material		all files
Apr 24, 2017	DEF 14A	Proxy statement	Jun 6, 2017	all files
Mar 14, 2017	4	Insider trade	Mar 11, 2017	all files
Mar 14, 2017	4	Insider trade	Mar 11, 2017	all files
Mar 14, 2017	4	Insider trade	Mar 11, 2017	all files
Mar 7, 2017	4	Insider trade	Mar 5, 2017	all files
Mar 7, 2017	4	Insider trade	Mar 5, 2017	all files
Mar 7, 2017	4	Insider trade	Mar 5, 2017	all files
Mar 2, 2017	4	Insider trade	Mar 2, 2017	all files
Mar 2, 2017	4	Insider trade	Mar 2, 2017	all files
Mar 2, 2017	4	Insider trade	Feb 28, 2017	all files
Mar 2, 2017	4	Insider trade	Feb 28, 2017	all files
Feb 24, 2017	10-K	Annual report	Dec 31, 2016	all files · tables
Feb 22, 2017	8-K	Quarterly results	Feb 22, 2017	all files
Feb 14, 2017	SC 13G/A	5%+ owner (passive), amended		all files
Feb 13, 2017	SC 13G	5%+ owner (passive)		all files
Feb 13, 2017	SC 13G/A	5%+ owner (passive), amended		all files
Feb 10, 2017	SC 13G/A	5%+ owner (passive), amended		all files
Feb 9, 2017	SC 13G/A	5%+ owner (passive), amended		all files
Jan 11, 2017	4	Insider trade	Jan 11, 2017	all files
Dec 29, 2016	4	Insider trade	Dec 29, 2016	all files
Nov 1, 2016	4	Insider trade	Oct 31, 2016	all files
Nov 1, 2016	4	Insider trade	Oct 31, 2016	all files
Oct 27, 2016	10-Q	Quarterly report	Sep 30, 2016	all files · tables
Oct 27, 2016	8-K	Quarterly results	Oct 26, 2016	all files
Sep 15, 2016	4	Insider trade	Sep 15, 2016	all files
Sep 15, 2016	4	Insider trade	Sep 15, 2016	all files
Sep 15, 2016	4	Insider trade	Sep 15, 2016	all files
Sep 15, 2016	4	Insider trade	Sep 15, 2016	all files
Sep 15, 2016	4	Insider trade	Sep 15, 2016	all files
Sep 15, 2016	4	Insider trade	Sep 15, 2016	all files
Sep 15, 2016	4	Insider trade	Sep 15, 2016	all files
Sep 13, 2016	4	Insider trade	Sep 11, 2016	all files
Aug 2, 2016	4	Insider trade	Aug 1, 2016	all files
Jul 28, 2016	10-Q	Quarterly report	Jun 30, 2016	all files · tables
Jul 27, 2016	8-K	Quarterly results	Jul 27, 2016	all files
Jun 28, 2016	S-8	Shares registered for employee plans		all files
Jun 9, 2016	8-K	Shareholder vote results	Jun 9, 2016	all files
May 2, 2016	4/A	Insider trade (amended)	Mar 11, 2016	all files
May 2, 2016	4/A	Insider trade (amended)	Mar 11, 2016	all files
Apr 28, 2016	3	New insider	Apr 22, 2016	all files
Apr 28, 2016	10-Q	Quarterly report	Mar 31, 2016	all files · tables
Apr 27, 2016	8-K	Quarterly results, Director or officer change	Apr 27, 2016	all files
Apr 26, 2016	DEFA14A	Extra proxy material		all files
Apr 26, 2016	DEF 14A	Proxy statement	Jun 9, 2016	all files
Mar 15, 2016	4	Insider trade	Mar 11, 2016	all files
Mar 15, 2016	4	Insider trade	Mar 11, 2016	all files
Mar 15, 2016	4	Insider trade	Mar 11, 2016	all files
Mar 8, 2016	4	Insider trade	Mar 5, 2016	all files
Mar 8, 2016	4	Insider trade	Mar 5, 2016	all files
Mar 8, 2016	4	Insider trade	Mar 5, 2016	all files
Mar 1, 2016	4	Insider trade	Feb 28, 2016	all files
Mar 1, 2016	4	Insider trade	Feb 28, 2016	all files
Feb 26, 2016	10-K	Annual report	Dec 31, 2015	all files · tables
Feb 24, 2016	8-K	Quarterly results	Feb 24, 2016	all files
Feb 16, 2016	SC 13G/A	5%+ owner (passive), amended		all files
Feb 16, 2016	SC 13G	5%+ owner (passive)		all files

Show the other 75 filings on this page

Press releases with quarterly results are attached to the 8-Ks marked "Quarterly results"; read them on Earnings releases.

Sources

SEC's filing index (data.sec.gov submissions). Each form links to the document on sec.gov.

Also

Earnings releases: the text of each quarter's results release. Statements by period: the income statement, balance sheet or cash flow of the last filings side by side.

Work with it

Excel workbook · CSV. Google Sheet that stays up to date: paste =IMPORTDATA("https://tickdelta.com/company/CSGP/export.csv") into a cell.

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