Options Chain for COSTAR GROUP INC COM (CSGP) - $29.63 as of 9/18/2026 7:21:29 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 15.00 | 13.30 | 15.30 | 14.30 | % | 0.95 | 0 | 0 | 1.44 | 0.99 | 0.00 | 0.00 | 9/18/2026 3:59:56 PM EST | |||
| 17.50 | 11.00 | 12.90 | 11.95 | % | 0.68 | 0 | 0 | 1.24 | 0.97 | 0.01 | -0.01 | 9/18/2026 3:59:56 PM EST | |||
| 20.00 | 8.90 | 10.40 | 9.65 | 8.68 | 0.00 | 0.00% | 0.48 | 0 | 3 | 1.06 | 0.93 | 0.02 | -0.01 | 7/14/2026 | 9/18/2026 3:59:56 PM EST |
| 22.50 | 6.90 | 8.10 | 7.50 | 7.40 | 0.00 | 0.00% | 0.33 | 0 | 27 | 0.90 | 0.85 | 0.03 | -0.01 | 9/10/2026 | 9/18/2026 3:59:56 PM EST |
| 25.00 | 5.00 | 6.20 | 5.60 | 8.01 | 0.00 | 0.00% | 0.22 | 0 | 29 | 0.55 | 0.77 | 0.04 | -0.01 | 9/3/2026 | 9/18/2026 3:59:56 PM EST |
| 30.00 | 2.70 | 2.90 | 2.80 | 3.10 | 0.00 | 0.00% | 0.09 | 2 | 165 | 0.54 | 0.51 | 0.05 | -0.02 | 9/18/2026 | 9/18/2026 3:59:56 PM EST |
| 35.00 | 1.20 | 1.50 | 1.35 | 1.25 | -0.20 | -13.80% | 0.04 | 69 | 2,270 | 0.55 | 0.29 | 0.04 | -0.02 | 9/18/2026 | 9/18/2026 3:59:56 PM EST |
| 40.00 | 0.30 | 1.00 | 0.65 | 0.75 | 0.00 | 0.00% | 0.02 | 0 | 1,931 | 0.54 | 0.16 | 0.03 | -0.01 | 9/17/2026 | 9/18/2026 3:59:56 PM EST |
| 45.00 | 0.05 | 0.60 | 0.33 | 0.40 | 0.00 | 0.00% | 0.01 | 0 | 161 | 0.72 | 0.07 | 0.02 | -0.01 | 9/17/2026 | 9/18/2026 3:59:56 PM EST |
| 50.00 | 0.05 | 0.20 | 0.13 | 0.20 | 0.00 | 0.00% | 0.00 | 0 | 129 | 0.56 | 0.04 | 0.01 | 0.00 | 9/17/2026 | 9/18/2026 3:59:56 PM EST |
| 55.00 | 0.00 | 0.60 | 0.30 | 0.28 | 0.00 | 0.00% | 0.01 | 0 | 25 | 0.95 | 0.01 | 0.00 | 0.00 | 8/21/2026 | 9/18/2026 3:59:56 PM EST |
| 60.00 | 0.00 | 0.15 | 0.08 | 0.38 | 0.00 | 0.00% | 0.00 | 0 | 16 | 0.74 | 0.01 | 0.00 | 0.00 | 8/28/2026 | 9/18/2026 3:59:56 PM EST |
| 65.00 | 0.00 | 0.50 | 0.25 | 0.15 | 0.00 | 0.00% | 0.00 | 0 | 12 | 1.08 | 0.00 | 0.00 | 0.00 | 9/2/2026 | 9/18/2026 3:59:56 PM EST |
| 70.00 | 0.00 | 0.50 | 0.25 | 0.10 | 0.00 | 0.00% | 0.00 | 0 | 12 | 1.15 | 0.00 | 0.00 | 0.00 | 7/30/2026 | 9/18/2026 3:59:56 PM EST |
| 75.00 | 0.00 | 0.50 | 0.25 | 0.15 | 0.00 | 0.00% | 0.00 | 0 | 17 | 1.21 | 0.00 | 0.00 | 0.00 | 7/28/2026 | 9/18/2026 3:59:56 PM EST |
| 80.00 | 0.00 | 0.45 | 0.23 | 0.10 | 0.00 | 0.00% | 0.00 | 0 | 18 | 1.25 | 0.00 | 0.00 | 0.00 | 7/28/2026 | 9/18/2026 3:59:56 PM EST |
| 85.00 | 0.00 | 0.05 | 0.03 | 0.01 | 0.00 | 0.00% | 0.00 | 0 | 3,085 | 0.87 | 0.00 | 0.00 | 0.00 | 9/16/2026 | 9/18/2026 3:59:56 PM EST |
| 90.00 | 0.00 | 0.45 | 0.23 | 0.06 | 0.00 | 0.00% | 0.00 | 0 | 5 | 1.26 | 0.00 | 0.00 | 0.00 | 7/27/2026 | 9/18/2026 3:59:56 PM EST |
| 95.00 | 0.00 | 0.45 | 0.23 | % | 0.00 | 0 | 5 | 1.39 | 0.00 | 0.00 | 0.00 | 9/18/2026 3:59:56 PM EST | |||
| 100.00 | 0.00 | 0.45 | 0.23 | 0.60 | 0.00 | 0.00% | 0.00 | 0 | 162 | 1.43 | 0.00 | 0.00 | 0.00 | 6/18/2026 | 9/18/2026 3:59:56 PM EST |
| 105.00 | 0.00 | 0.45 | 0.23 | % | 0.00 | 0 | 4 | 1.47 | 0.00 | 0.00 | 0.00 | 9/18/2026 3:59:56 PM EST | |||
| 110.00 | 0.00 | 0.45 | 0.23 | % | 0.00 | 0 | 2 | 1.51 | 0.00 | 0.00 | 0.00 | 9/18/2026 3:59:56 PM EST | |||
| 115.00 | 0.00 | 0.45 | 0.23 | 0.17 | 0.00 | 0.00% | 0.00 | 0 | 1 | 1.55 | 0.00 | 0.00 | 0.00 | 5/5/2026 | 9/18/2026 3:59:56 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 15.00 | 0.00 | 0.60 | 0.30 | 0.01 | 0.00 | 0.00% | 0.02 | 0 | 234 | 1.20 | -0.01 | 0.00 | 0.00 | 8/17/2026 | 9/18/2026 3:59:56 PM EST |
| 17.50 | 0.05 | 0.65 | 0.35 | 0.15 | 0.00 | 0.00% | 0.02 | 0 | 63 | 1.00 | -0.03 | 0.01 | -0.01 | 9/2/2026 | 9/18/2026 3:59:56 PM EST |
| 20.00 | 0.05 | 0.70 | 0.38 | 0.25 | 0.00 | 0.00% | 0.02 | 0 | 40 | 0.82 | -0.07 | 0.02 | -0.01 | 9/16/2026 | 9/18/2026 3:59:56 PM EST |
| 22.50 | 0.50 | 0.70 | 0.60 | 0.60 | 0.00 | 0.00% | 0.03 | 0 | 138 | 0.54 | -0.14 | 0.03 | -0.01 | 9/17/2026 | 9/18/2026 3:59:56 PM EST |
| 25.00 | 1.15 | 1.40 | 1.28 | 1.15 | +0.15 | +15.00% | 0.05 | 44 | 13,629 | 0.55 | -0.23 | 0.04 | -0.01 | 9/18/2026 | 9/18/2026 3:59:56 PM EST |
| 30.00 | 3.20 | 3.80 | 3.50 | 3.23 | +0.15 | +4.87% | 0.12 | 21 | 993 | 0.54 | -0.49 | 0.05 | -0.02 | 9/18/2026 | 9/18/2026 3:59:56 PM EST |
| 35.00 | 6.40 | 7.50 | 6.95 | 6.70 | +0.25 | +3.88% | 0.20 | 1 | 379 | 0.52 | -0.71 | 0.04 | -0.02 | 9/18/2026 | 9/18/2026 3:59:56 PM EST |
| 40.00 | 10.60 | 12.00 | 11.30 | 8.97 | 0.00 | 0.00% | 0.28 | 0 | 231 | 0.83 | -0.84 | 0.03 | -0.01 | 8/31/2026 | 9/18/2026 3:59:56 PM EST |
| 45.00 | 15.10 | 16.90 | 16.00 | % | 0.36 | 0 | 36 | 0.98 | -0.93 | 0.02 | -0.01 | 9/18/2026 3:59:56 PM EST | |||
| 50.00 | 19.90 | 22.00 | 20.95 | 17.92 | 0.00 | 0.00% | 0.42 | 0 | 0 | 1.01 | -0.96 | 0.01 | 0.00 | 6/12/2026 | 9/18/2026 3:59:56 PM EST |
| 55.00 | 24.90 | 26.90 | 25.90 | 25.60 | 0.00 | 0.00% | 0.47 | 0 | 0 | 1.34 | -0.99 | 0.00 | 0.00 | 9/10/2026 | 9/18/2026 3:59:56 PM EST |
| 60.00 | 29.90 | 31.90 | 30.90 | 26.34 | 0.00 | 0.00% | 0.52 | 0 | 0 | 1.30 | -0.99 | 0.00 | 0.00 | 4/29/2026 | 9/18/2026 3:59:56 PM EST |
| 65.00 | 34.90 | 36.90 | 35.90 | 32.60 | 0.00 | 0.00% | 0.55 | 0 | 0 | 1.53 | -1.00 | 0.00 | 0.00 | 5/14/2026 | 9/18/2026 3:59:56 PM EST |
| 70.00 | 39.90 | 41.90 | 40.90 | % | 0.58 | 0 | 0 | 1.62 | -1.00 | 0.00 | 0.00 | 9/18/2026 3:59:56 PM EST | |||
| 75.00 | 44.90 | 46.90 | 45.90 | 43.77 | 0.00 | 0.00% | 0.61 | 0 | 0 | 1.58 | -1.00 | 0.00 | 0.00 | 9/14/2026 | 9/18/2026 3:59:56 PM EST |
| 80.00 | 49.90 | 51.90 | 50.90 | % | 0.64 | 0 | 0 | 1.57 | -1.00 | 0.00 | 0.00 | 9/18/2026 3:59:56 PM EST | |||
| 85.00 | 54.90 | 56.90 | 55.90 | % | 0.66 | 0 | 0 | 1.83 | -1.00 | 0.00 | 0.00 | 9/18/2026 3:59:56 PM EST | |||
| 90.00 | 59.90 | 61.90 | 60.90 | % | 0.68 | 0 | 0 | 1.89 | -1.00 | 0.00 | 0.00 | 9/18/2026 3:59:56 PM EST | |||
| 95.00 | 64.90 | 66.90 | 65.90 | % | 0.69 | 0 | 0 | 1.95 | -1.00 | 0.00 | 0.00 | 9/18/2026 3:59:56 PM EST | |||
| 100.00 | 69.90 | 71.90 | 70.90 | % | 0.71 | 0 | 0 | 1.85 | -1.00 | 0.00 | 0.00 | 9/18/2026 3:59:56 PM EST | |||
| 105.00 | 74.90 | 76.90 | 75.90 | % | 0.72 | 0 | 0 | 1.90 | -1.00 | 0.00 | 0.00 | 9/18/2026 3:59:56 PM EST | |||
| 110.00 | 79.90 | 81.90 | 80.90 | % | 0.74 | 0 | 0 | 2.10 | -1.00 | 0.00 | 0.00 | 9/18/2026 3:59:56 PM EST | |||
| 115.00 | 84.90 | 86.90 | 85.90 | % | 0.75 | 0 | 0 | 2.10 | -1.00 | 0.00 | 0.00 | 9/18/2026 3:59:56 PM EST |