Dudediligence.

CoStar Group, Inc

CSGPNASDAQ · Services-Business Services, NEC
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Last 12 months

Sales planned on beside the trades reported on , and whether each names a .

Planned ·

$257,988

2 notices · 5,750 sh

Oct 2025 to Oct 2026

Reported ·

$281,172

2 sales · 6 buys · $5,994,763 bought

Oct 2025 to Jun 2026

The two figures cover different periods.

None of the 2 reported sales carry the 10b5-1 box. Together they are under 0.01% of the shares on issue.

PLANNED · FORM 144Oct 2025 to Oct 2026REPORTED · FORM 4Oct 2025 to Jun 2026N2025DJ2026FMAMJJASO2026-08-05: Hill John W, Form 1442025-11-13: Hill John W, Form 1442025-11-13: Cann Cynthia Cammett, sold2025-11-13: Hill John W, sold2026-02-27: FLORANCE ANDREW C, bought2026-03-02: Glaser Rachel C, bought2026-03-02: SAINT FREDERICK G., bought2026-03-06: Sams Louise S, bought2026-05-01: FLORANCE ANDREW C, bought
under a no plan named▼ sale▲ buysize is dollars

Form 144 notices, newest first

2026-08-05Hill John W, Director$106,068
3,500 shno plan dateForm 4s on file end Jun 23144 ↗
2025-11-13Hill John W, Director, Member of immediate family of any of the foregoing$151,920
2,250 shno plan date144 ↗
Form 4, 2025-11-17: sold 2,250 at $68.68 Form 4 ↗