Options Chain for COSTAR GROUP INC COM (CSGP) - $32.01 as of 10/27/2026 8:46:53 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 | 15.90 | 19.50 | 17.70 | % | 1.18 | 0 | 0 | 1.95 | 1.00 | 0.00 | 0.00 | 10/27/2026 3:59:55 PM EST | |||
| 17.50 | 13.60 | 16.00 | 14.80 | % | 0.85 | 0 | 0 | 1.72 | 0.99 | 0.00 | 0.00 | 10/27/2026 3:59:55 PM EST | |||
| 20.00 | 11.30 | 13.30 | 12.30 | 13.34 | +4.66 | +53.69% | 0.61 | 1 | 3 | 1.34 | 0.98 | 0.00 | 0.00 | 10/27/2026 | 10/27/2026 3:59:55 PM EST |
| 22.50 | 9.00 | 10.60 | 9.80 | 10.90 | +5.00 | +84.75% | 0.44 | 1 | 26 | 1.02 | 0.95 | 0.01 | -0.01 | 10/27/2026 | 10/27/2026 3:59:55 PM EST |
| 25.00 | 6.80 | 8.20 | 7.50 | 5.65 | 0.00 | 0.00% | 0.30 | 0 | 29 | 0.83 | 0.88 | 0.03 | -0.01 | 10/14/2026 | 10/27/2026 3:59:55 PM EST |
| 30.00 | 3.30 | 4.10 | 3.70 | 4.80 | 0.00 | 0.00% | 0.12 | 0 | 854 | 0.55 | 0.66 | 0.05 | -0.02 | 10/26/2026 | 10/27/2026 3:59:55 PM EST |
| 35.00 | 1.60 | 1.85 | 1.73 | 1.85 | -0.42 | -18.51% | 0.05 | 2 | 2,527 | 0.59 | 0.38 | 0.06 | -0.03 | 10/27/2026 | 10/27/2026 3:59:55 PM EST |
| 40.00 | 0.40 | 0.90 | 0.65 | 0.78 | -0.12 | -13.34% | 0.02 | 1 | 3,081 | 0.58 | 0.18 | 0.04 | -0.02 | 10/27/2026 | 10/27/2026 3:59:55 PM EST |
| 45.00 | 0.15 | 0.35 | 0.25 | 0.30 | -0.10 | -25.00% | 0.01 | 10 | 184 | 0.59 | 0.07 | 0.02 | -0.01 | 10/27/2026 | 10/27/2026 3:59:55 PM EST |
| 50.00 | 0.10 | 0.25 | 0.18 | 0.20 | +0.01 | +5.27% | 0.00 | 12 | 84 | 0.69 | 0.03 | 0.01 | 0.00 | 10/27/2026 | 10/27/2026 3:59:55 PM EST |
| 55.00 | 0.00 | 0.15 | 0.08 | 0.10 | 0.00 | 0.00% | 0.00 | 45 | 26 | 0.77 | 0.01 | 0.00 | 0.00 | 10/27/2026 | 10/27/2026 3:59:55 PM EST |
| 60.00 | 0.05 | 0.15 | 0.10 | 0.10 | +0.05 | +100.00% | 0.00 | 4 | 21 | 0.80 | 0.00 | 0.00 | 0.00 | 10/27/2026 | 10/27/2026 3:59:55 PM EST |
| 65.00 | 0.00 | 0.50 | 0.25 | 0.15 | 0.00 | 0.00% | 0.00 | 0 | 12 | 1.19 | 0.00 | 0.00 | 0.00 | 9/2/2026 | 10/27/2026 3:59:55 PM EST |
| 70.00 | 0.00 | 0.50 | 0.25 | 0.10 | 0.00 | 0.00% | 0.00 | 0 | 12 | 1.28 | 0.00 | 0.00 | 0.00 | 7/30/2026 | 10/27/2026 3:59:55 PM EST |
| 75.00 | 0.00 | 0.50 | 0.25 | 0.15 | 0.00 | 0.00% | 0.00 | 0 | 17 | 1.36 | 0.00 | 0.00 | 0.00 | 7/28/2026 | 10/27/2026 3:59:55 PM EST |
| 80.00 | 0.00 | 1.25 | 0.63 | 0.10 | 0.00 | 0.00% | 0.01 | 0 | 18 | 1.40 | 0.00 | 0.00 | 0.00 | 7/28/2026 | 10/27/2026 3:59:55 PM EST |
| 85.00 | 0.00 | 0.05 | 0.03 | 0.01 | 0.00 | 0.00% | 0.00 | 0 | 3,085 | 1.06 | 0.00 | 0.00 | 0.00 | 10/26/2026 | 10/27/2026 3:59:55 PM EST |
| 90.00 | 0.00 | 0.50 | 0.25 | 0.06 | 0.00 | 0.00% | 0.00 | 0 | 5 | 1.56 | 0.00 | 0.00 | 0.00 | 7/27/2026 | 10/27/2026 3:59:55 PM EST |
| 95.00 | 0.00 | 0.50 | 0.25 | % | 0.00 | 0 | 5 | 1.62 | 0.00 | 0.00 | 0.00 | 10/27/2026 3:59:55 PM EST | |||
| 100.00 | 0.00 | 0.50 | 0.25 | 0.60 | 0.00 | 0.00% | 0.00 | 0 | 162 | 1.68 | 0.00 | 0.00 | 0.00 | 6/18/2026 | 10/27/2026 3:59:55 PM EST |
| 105.00 | 0.00 | 0.50 | 0.25 | % | 0.00 | 0 | 4 | 1.73 | 0.00 | 0.00 | 0.00 | 10/27/2026 3:59:55 PM EST | |||
| 110.00 | 0.00 | 0.50 | 0.25 | % | 0.00 | 0 | 2 | 1.78 | 0.00 | 0.00 | 0.00 | 10/27/2026 3:59:55 PM EST | |||
| 115.00 | 0.00 | 0.50 | 0.25 | 0.17 | 0.00 | 0.00% | 0.00 | 0 | 1 | 1.83 | 0.00 | 0.00 | 0.00 | 5/5/2026 | 10/27/2026 3:59:55 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 | 0.55 | 0.28 | 0.01 | 0.00 | 0.00% | 0.02 | 0 | 234 | 1.54 | 0.00 | 0.00 | 0.00 | 8/17/2026 | 10/27/2026 3:59:55 PM EST |
| 17.50 | 0.00 | 0.60 | 0.30 | 0.15 | 0.00 | 0.00% | 0.02 | 0 | 63 | 1.31 | -0.01 | 0.00 | 0.00 | 9/2/2026 | 10/27/2026 3:59:55 PM EST |
| 20.00 | 0.00 | 0.50 | 0.25 | 0.10 | -0.20 | -66.67% | 0.01 | 52 | 47 | 1.02 | -0.02 | 0.00 | 0.00 | 10/27/2026 | 10/27/2026 3:59:55 PM EST |
| 22.50 | 0.10 | 0.45 | 0.28 | 0.15 | 0.00 | 0.00% | 0.01 | 4 | 145 | 0.67 | -0.05 | 0.01 | -0.01 | 10/27/2026 | 10/27/2026 3:59:55 PM EST |
| 25.00 | 0.20 | 0.50 | 0.35 | 0.40 | +0.15 | +60.00% | 0.01 | 6 | 13,521 | 0.55 | -0.12 | 0.03 | -0.01 | 10/27/2026 | 10/27/2026 3:59:55 PM EST |
| 30.00 | 1.35 | 2.05 | 1.70 | 1.65 | +0.27 | +19.57% | 0.06 | 11 | 2,150 | 0.56 | -0.34 | 0.05 | -0.02 | 10/27/2026 | 10/27/2026 3:59:55 PM EST |
| 35.00 | 4.00 | 4.80 | 4.40 | 4.30 | +1.44 | +50.35% | 0.13 | 1 | 294 | 0.53 | -0.63 | 0.06 | -0.03 | 10/27/2026 | 10/27/2026 3:59:55 PM EST |
| 40.00 | 7.80 | 9.30 | 8.55 | 6.12 | 0.00 | 0.00% | 0.21 | 0 | 234 | 0.81 | -0.82 | 0.04 | -0.02 | 10/22/2026 | 10/27/2026 3:59:55 PM EST |
| 45.00 | 12.20 | 13.90 | 13.05 | % | 0.29 | 0 | 36 | 0.91 | -0.93 | 0.02 | -0.01 | 10/27/2026 3:59:55 PM EST | |||
| 50.00 | 16.90 | 19.20 | 18.05 | 17.92 | 0.00 | 0.00% | 0.36 | 0 | 0 | 1.17 | -0.97 | 0.01 | 0.00 | 6/12/2026 | 10/27/2026 3:59:55 PM EST |
| 55.00 | 21.80 | 24.20 | 23.00 | 25.60 | 0.00 | 0.00% | 0.42 | 0 | 0 | 1.32 | -0.99 | 0.00 | 0.00 | 9/10/2026 | 10/27/2026 3:59:55 PM EST |
| 60.00 | 26.70 | 29.90 | 28.30 | 31.70 | 0.00 | 0.00% | 0.47 | 0 | 0 | 1.41 | -1.00 | 0.00 | 0.00 | 9/25/2026 | 10/27/2026 3:59:55 PM EST |
| 65.00 | 31.70 | 35.00 | 33.35 | 32.60 | 0.00 | 0.00% | 0.51 | 0 | 0 | 1.53 | -1.00 | 0.00 | 0.00 | 5/14/2026 | 10/27/2026 3:59:55 PM EST |
| 70.00 | 36.70 | 40.00 | 38.35 | % | 0.55 | 0 | 0 | 1.63 | -1.00 | 0.00 | 0.00 | 10/27/2026 3:59:55 PM EST | |||
| 75.00 | 41.70 | 45.00 | 43.35 | 43.77 | 0.00 | 0.00% | 0.58 | 0 | 0 | 1.76 | -1.00 | 0.00 | 0.00 | 9/14/2026 | 10/27/2026 3:59:55 PM EST |
| 80.00 | 46.70 | 49.90 | 48.30 | % | 0.60 | 0 | 0 | 1.82 | -1.00 | 0.00 | 0.00 | 10/27/2026 3:59:55 PM EST | |||
| 85.00 | 51.70 | 54.90 | 53.30 | % | 0.63 | 0 | 0 | 1.90 | -1.00 | 0.00 | 0.00 | 10/27/2026 3:59:55 PM EST | |||
| 90.00 | 56.70 | 59.90 | 58.30 | % | 0.65 | 0 | 0 | 1.97 | -1.00 | 0.00 | 0.00 | 10/27/2026 3:59:55 PM EST | |||
| 95.00 | 61.70 | 64.90 | 63.30 | % | 0.67 | 0 | 0 | 2.05 | -1.00 | 0.00 | 0.00 | 10/27/2026 3:59:55 PM EST | |||
| 100.00 | 66.70 | 69.90 | 68.30 | % | 0.68 | 0 | 0 | 2.11 | -1.00 | 0.00 | 0.00 | 10/27/2026 3:59:55 PM EST | |||
| 105.00 | 71.70 | 74.90 | 73.30 | % | 0.70 | 0 | 0 | 2.17 | -1.00 | 0.00 | 0.00 | 10/27/2026 3:59:55 PM EST | |||
| 110.00 | 76.70 | 79.50 | 78.10 | % | 0.71 | 0 | 0 | 2.23 | -1.00 | 0.00 | 0.00 | 10/27/2026 3:59:55 PM EST | |||
| 115.00 | 81.70 | 85.00 | 83.35 | % | 0.72 | 0 | 0 | 2.33 | -1.00 | 0.00 | 0.00 | 10/27/2026 3:59:55 PM EST |