COSTAR GROUP, INC.
CSGP- Exchange
- Nasdaq
- Industry
- Services-Business Services, NEC
- SEC CIK
- 0001057352
Insider trades, last 90 days
1 buy · 2 sells
- Bought $2.49M
- Sold $253.11K
- Open-market purchases (P) and sales (S), counted by Form 4 filing.
13F holders, Q2 2026
760
- −37 vs. Q1 2026
- Total value $12.29B
Superinvestors holding CSGP
2
- At the end of Q2 2026
Price chart
Latest insider trades
View all: Latest insider tradesOpen-market purchases and sales by CSGP insiders, newest first.
| Filed (ET) | Trade date | Insider | Transaction | Shares | Avg price | Value | Shares after | Holding change | Filing |
|---|---|---|---|---|---|---|---|---|---|
| Aug 10, 20264:06 PM ET | Aug 7, 2026 | Cann Cynthia CammettChief Accounting Officer | SSaleCommon Stock, par value $0.01 per share | −4.79K | $30.78 | −$147.37K | 18.82K | −20.3% | SEC |
| Aug 10, 20264:06 PM ET | Aug 5, 2026 | Hill John WDirector | SSaleCommon Stock, par value $0.01 per share | −3.5K | $30.21 | −$105.74K | 22.99K | −13.2% | SEC |
| Aug 5, 20269:27 AM ET | Aug 4, 2026 | FLORANCE ANDREW CFounder and CEO | PPurchaseCommon Stock, par value $0.01 per share | +83.3K | $29.89 | +$2.49M | 1.81M | +4.8% | SEC |
| May 4, 2026 | May 1, 2026 | FLORANCE ANDREW CPresident and CEO | PPurchaseCommon Stock, par value $0.01 per share | +71.43K | $35.1982 | +$2.51M | 1.72M | +4.3% | SEC |
| Mar 9, 2026 | Mar 6, 2026 | Sams Louise SDirector | PPurchaseCommon Stock, par value $0.01 per share | +1K | $48.36 | +$48.36K | 20.41K | +5.2% | SEC |
Top 5 13F holders, Q2 2026
View all: Top 5 13F holders, Q2 2026The largest institutional positions in CSGP at the end of Q2 2026.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| VANGUARD PORTFOLIO MANAGEMENT LLC | 37,914,844 | $1.07B | 0.05% | −319,289−0.8% | Reduced |
| BlackRock, Inc. | 33,813,969 | $957.61M | 0.01% | +5,7850.0% | Added |
| VANGUARD CAPITAL MANAGEMENT LLC | 26,683,792 | $755.68M | 0.02% | −740,111−2.7% | Reduced |
| BAMCO INC /NY/ | 21,626,763 | $612.47M | 0.92% | +5,312,588+32.6% | Added |
| Banque Cantonale Vaudoise | 19,567 | $554M | 0.08% | +5,540+39.5% | Added |