Options Chain for COSTAR GROUP INC COM (CSGP) - $27.88 as of 10/1/2026 5:15:25 PM EST
Calls
| Strike | Bid | Ask | Premium | Last Price | Change | %Chg | Premium to Strike Price Ratio | Volume | Open Interest | IV | Delta | Gamma | Theta | Last Trade | Last Updated |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 17.50 | 9.60 | 11.30 | 10.45 | % | 0.60 | 0 | 0 | 1.34 | 0.98 | 0.01 | 0.00 | 10/1/2026 3:59:59 PM EST | |||
| 20.00 | 7.40 | 8.80 | 8.10 | % | 0.40 | 0 | 0 | 1.05 | 0.93 | 0.02 | -0.01 | 10/1/2026 3:59:59 PM EST | |||
| 22.50 | 5.30 | 6.20 | 5.75 | % | 0.26 | 0 | 0 | 0.75 | 0.85 | 0.04 | -0.01 | 10/1/2026 3:59:59 PM EST | |||
| 25.00 | 3.40 | 4.50 | 3.95 | 3.20 | 0.00 | 0.00% | 0.16 | 0 | 9 | 0.58 | 0.73 | 0.06 | -0.02 | 9/29/2026 | 10/1/2026 3:59:59 PM EST |
| 30.00 | 1.40 | 1.55 | 1.48 | 1.45 | +0.16 | +12.41% | 0.05 | 35 | 136 | 0.57 | 0.39 | 0.07 | -0.02 | 10/1/2026 | 10/1/2026 3:59:59 PM EST |
| 35.00 | 0.35 | 0.50 | 0.43 | 0.50 | +0.08 | +19.05% | 0.01 | 5 | 232 | 0.56 | 0.17 | 0.04 | -0.02 | 10/1/2026 | 10/1/2026 3:59:59 PM EST |
| 40.00 | 0.10 | 0.30 | 0.20 | 0.20 | 0.00 | 0.00% | 0.01 | 0 | 8 | 0.62 | 0.06 | 0.02 | -0.01 | 9/25/2026 | 10/1/2026 3:59:59 PM EST |
| 45.00 | 0.00 | 0.50 | 0.25 | 0.15 | 0.00 | 0.00% | 0.01 | 0 | 5 | 0.96 | 0.02 | 0.01 | 0.00 | 9/21/2026 | 10/1/2026 3:59:59 PM EST |
Puts
| Strike | Bid | Ask | Premium | Last Price | Change | %Chg | Premium to Strike Price Ratio | Volume | Open Interest | IV | Delta | Gamma | Theta | Last Trade | Last Updated |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 17.50 | 0.00 | 0.45 | 0.23 | % | 0.01 | 0 | 0 | 1.03 | -0.02 | 0.01 | 0.00 | 10/1/2026 3:59:59 PM EST | |||
| 20.00 | 0.10 | 0.40 | 0.25 | 0.24 | -0.01 | -4.00% | 0.01 | 1 | 1 | 0.66 | -0.07 | 0.02 | -0.01 | 10/1/2026 | 10/1/2026 3:59:59 PM EST |
| 22.50 | 0.30 | 0.75 | 0.53 | 0.52 | -0.02 | -3.71% | 0.02 | 2 | 52 | 0.60 | -0.15 | 0.04 | -0.01 | 10/1/2026 | 10/1/2026 3:59:59 PM EST |
| 25.00 | 0.95 | 1.10 | 1.03 | 1.05 | -0.08 | -7.08% | 0.04 | 10 | 367 | 0.55 | -0.27 | 0.06 | -0.02 | 10/1/2026 | 10/1/2026 3:59:59 PM EST |
| 30.00 | 3.40 | 3.80 | 3.60 | 3.76 | -0.03 | -0.80% | 0.12 | 1 | 82 | 0.55 | -0.61 | 0.07 | -0.02 | 10/1/2026 | 10/1/2026 3:59:59 PM EST |
| 35.00 | 7.40 | 8.20 | 7.80 | 8.07 | 0.00 | 0.00% | 0.22 | 0 | 4 | 0.61 | -0.83 | 0.04 | -0.02 | 9/30/2026 | 10/1/2026 3:59:59 PM EST |
| 40.00 | 11.90 | 13.10 | 12.50 | % | 0.31 | 0 | 0 | 0.97 | -0.94 | 0.02 | -0.01 | 10/1/2026 3:59:59 PM EST | |||
| 45.00 | 16.20 | 18.30 | 17.25 | % | 0.38 | 0 | 0 | 1.23 | -0.98 | 0.01 | 0.00 | 10/1/2026 3:59:59 PM EST |