CoverageForm 410-K10-Q8-K13D13G13F

Costar Group, Inc.

CSGPCIK 0001057352 · Every Form 4 filed by insiders at this issuer. See financials →

Annual report (10-K)

Latest 10-K filed Feb 26, 2026. Sentiment + YoY language diff vs prior year. Read sections →

Signal:Neutral
Risk Factors:tone -0.0344Δ+0.002386% similar+87/-68
MD&A:tone -0.0072Δ+0.002869% similar+125/-91

Sentiment via Loughran-McDonald lexicon · YoY diff via Jaccard similarity + paragraph set difference.

Recent 8-K announcements

Per-item disclosure feed. Item 2.02 is the earnings release.

Top insiders

Most active reporters at Costar Group, Inc.

NameRolesFilings
Ruggles Lisa
Officer
24
Saint Frederick G.
Officer
22
Florance Andrew C
OfficerDirector
20
Desmarais Michael J
Officer
17
Simuro Frank
Officer
16

Showing 1-5 of 20

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Top performers

Insiders ranked by realized 90-day signed return on their open-market trades at Costar Group, Inc.. Minimum 3 scored trades. Returns are signed - a sale followed by a rally counts against the insider.

#InsiderTradesWin rateAvgMedianBestWorst
1Cann Cynthia Cammett580%+10.5%+6.1%+30.1%-1.4%
2Ruggles Lisa367%+10.2%+13.7%+19.0%-2.0%
3Wheeler Scott T367%+9.5%+14.6%+16.0%-2.1%
4Saint Frederick G.650%+3.2%+6.0%+24.9%-26.5%
5Florance Andrew C30%-10.6%-4.2%-0.1%-27.6%
6Desmarais Michael J450%-2.1%-3.7%+16.0%-17.0%
7Hill John W743%-2.0%-0.5%+30.1%-30.9%

All filings

183 Form 4 / 4-A filings, newest first

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