C

CSGP

Nasdaq

COSTAR GROUP, INC.

Latest disclosureAugust 10, 2026

Insider score Why 37?: 37/ 100
Qualifying buys · 30d: $0

3 purchases · 2 sales

Price by TradingView

Insider transactions 18

Limited filing history

Filters

Last 30 daysNo qualifying insider buying. No qualifying insider sales.

Sale disclosed

Cynthia Cammett Cann

Chief Accounting Officer

Common Stock, par value $0.01 per share

Reported value: $147.37K
Reported price: $30.78 / share

Sale disclosed

John W. Hill

Director

Common Stock, par value $0.01 per share

Reported value: $105.74K
Reported price: $30.21 / share

Reporting insider	Security / transaction	Amount / price	Value	Traded / disclosed	Source
Chief Accounting Officer	Common Stock, par value $0.01 per shareSale	4,788$30.78 / share	$147.37K	Aug 7Filed Aug 10 · 3d later	SEC filing
Director	Common Stock, par value $0.01 per shareSale	3,500$30.21 / share	$105.74K	Aug 5Filed Aug 10 · 5d later	SEC filing

Congress transactions 9

All Congress filings

Purchase disclosed

CoStar Group, Inc. - Common Stock (CSGP) · Stock

The filing reports a purchase for the member.

Gilbert Cisneros official portrait

Gilbert CisnerosReporting House member

Reported amount: $1,001 – $15,000Reported range; exact amount not disclosed.
Trade date: August 19, 2026

Partial sale disclosed

CoStar Group, Inc. - Common Stock (CSGP) · Stock

The filing reports a partial sale for the member.

Gilbert Cisneros official portrait

Gilbert CisnerosReporting House member

Reported amount: $1,001 – $15,000Reported range; exact amount not disclosed.
Trade date: April 14, 2026

Purchase disclosed

CoStar Group, Inc. - Common Stock (CSGP) · Stock

The filing reports a purchase for the member.

Gilbert Cisneros official portrait

Gilbert CisnerosReporting House member

Reported amount: $1,001 – $15,000Reported range; exact amount not disclosed.
Trade date: March 13, 2026

Purchase disclosed

CoStar Group, Inc. - Common Stock (CSGP) · Stock

The filing reports a purchase for the member.

Gilbert Cisneros official portrait

Gilbert CisnerosReporting House member

Reported amount: $1,001 – $15,000Reported range; exact amount not disclosed.
Trade date: January 28, 2026

Purchase disclosed

CoStar Group, Inc. - Common Stock (CSGP) · Stock

The filing reports a purchase for the member.

Gilbert Cisneros official portrait

Gilbert CisnerosReporting House member

Reported amount: $1,001 – $15,000Reported range; exact amount not disclosed.
Trade date: December 10, 2025

Purchase disclosed

CoStar Group, Inc. - Common Stock (CSGP) · Stock

The filing reports a purchase for the member.

Gilbert Cisneros official portrait

Gilbert CisnerosReporting House member

Reported amount: $1,001 – $15,000Reported range; exact amount not disclosed.
Trade date: October 15, 2025

Sale disclosed

CoStar Group, Inc. - Common Stock (CSGP) · Stock

The filing reports a sale for a spouse.

Lisa McClain official portrait

Lisa McClainReporting House member

Reported amount: $1,001 – $15,000Reported range; exact amount not disclosed.
Trade date: September 25, 2025

Purchase disclosed

CoStar Group, Inc. - Common Stock (CSGP) · Stock

The filing reports a purchase for the member.

Gilbert Cisneros official portrait

Gilbert CisnerosReporting House member

Reported amount: $1,001 – $15,000Reported range; exact amount not disclosed.
Trade date: September 30, 2025

Purchase disclosed

CoStar Group, Inc. - Common Stock (CSGP) · Stock

The filing reports a purchase for the member.

Gilbert Cisneros official portrait

Gilbert CisnerosReporting House member

Reported amount: $1,001 – $15,000Reported range; exact amount not disclosed.
Trade date: September 22, 2025

Why this buying score?

Qualifying common-equity purchase value

$1,997,962 of common-equity purchase value after transaction-age decay across 180 days.

+25 pts

Distinct buying groups

1 distinct reporting-owner group(s). Joint rows count once; identity is not proof of discretion.

+4 pts

CEO purchase

Qualifying common-equity P acquisition; no disclosed plan, exercise or excluded purchase context detected.

+8 pts

This score describes qualifying insider purchases at issuer level. Read the methodology

Sources and coverage

Limited filing history · Market-wide discovery does not establish complete company history. View coverage

Source: SEC EDGAR · Form 4
Issuer CIK: 0001057352
Latest public acceptance: Aug 10, 2026, 08:06 PM UTC
Score calculated: Oct 8, 2026, 12:05 AM UTC
Parser: form4-parser-1.5
Classifier: form4-classifier-1.1
Scoring methodology: insider-experimental-1.1
Availability: Public filing time, not trade date

Open a transaction's SEC filing for the primary evidence. A code P may describe an open-market or private purchase; classification is not proof of intent.

Insider activity can have many explanations. Signal Strength is not a probability of profit or a recommendation to trade.