Options Chain for COSTAR GROUP INC COM (CSGP) - $27.66 as of 7/27/2026 1:41:36 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 | 13.60 | 15.30 | 14.45 | % | 0.96 | 0 | 0 | 1.82 | 0.98 | 0.00 | -0.01 | 7/27/2026 3:59:59 PM EST | |||
| 17.50 | 11.30 | 13.10 | 12.20 | 15.50 | 0.00 | 0.00% | 0.70 | 0 | 1 | 1.52 | 0.97 | 0.01 | -0.01 | 5/29/2026 | 7/27/2026 3:59:59 PM EST |
| 20.00 | 9.30 | 10.40 | 9.85 | 9.70 | 0.00 | 0.00% | 0.49 | 0 | 8 | 1.14 | 0.92 | 0.02 | -0.02 | 6/25/2026 | 7/27/2026 3:59:59 PM EST |
| 22.50 | 7.10 | 8.00 | 7.55 | % | 0.34 | 0 | 0 | 0.74 | 0.86 | 0.03 | -0.02 | 7/27/2026 3:59:59 PM EST | |||
| 25.00 | 5.20 | 5.60 | 5.40 | 4.43 | 0.00 | 0.00% | 0.22 | 0 | 32 | 0.65 | 0.77 | 0.04 | -0.03 | 7/24/2026 | 7/27/2026 3:59:59 PM EST |
| 30.00 | 2.50 | 2.75 | 2.63 | 3.00 | +1.00 | +50.00% | 0.09 | 87 | 129 | 0.65 | 0.51 | 0.06 | -0.03 | 7/27/2026 | 7/27/2026 3:59:59 PM EST |
| 35.00 | 1.05 | 1.25 | 1.15 | 1.35 | +0.55 | +68.75% | 0.03 | 11 | 595 | 0.66 | 0.28 | 0.05 | -0.03 | 7/27/2026 | 7/27/2026 3:59:59 PM EST |
| 40.00 | 0.40 | 0.65 | 0.53 | 0.30 | 0.00 | 0.00% | 0.01 | 0 | 520 | 0.69 | 0.16 | 0.03 | -0.02 | 7/23/2026 | 7/27/2026 3:59:59 PM EST |
| 45.00 | 0.15 | 0.40 | 0.28 | 0.25 | +0.07 | +38.89% | 0.01 | 10 | 3,741 | 0.72 | 0.09 | 0.02 | -0.01 | 7/27/2026 | 7/27/2026 3:59:59 PM EST |
| 50.00 | 0.10 | 0.50 | 0.30 | 0.10 | 0.00 | 0.00% | 0.01 | 0 | 1,305 | 0.85 | 0.04 | 0.01 | -0.01 | 7/23/2026 | 7/27/2026 3:59:59 PM EST |
| 55.00 | 0.00 | 0.60 | 0.30 | 0.07 | 0.00 | 0.00% | 0.01 | 0 | 439 | 1.15 | 0.02 | 0.00 | 0.00 | 7/20/2026 | 7/27/2026 3:59:59 PM EST |
| 60.00 | 0.05 | 0.20 | 0.13 | 0.05 | 0.00 | 0.00% | 0.00 | 0 | 212 | 0.92 | 0.01 | 0.00 | 0.00 | 7/23/2026 | 7/27/2026 3:59:59 PM EST |
| 65.00 | 0.00 | 0.50 | 0.25 | 0.10 | 0.00 | 0.00% | 0.00 | 0 | 91 | 1.31 | 0.00 | 0.00 | 0.00 | 5/14/2026 | 7/27/2026 3:59:59 PM EST |
| 70.00 | 0.00 | 0.20 | 0.10 | 0.05 | 0.00 | 0.00% | 0.00 | 0 | 859 | 1.18 | 0.00 | 0.00 | 0.00 | 7/2/2026 | 7/27/2026 3:59:59 PM EST |
| 75.00 | 0.00 | 0.50 | 0.25 | 0.05 | 0.00 | 0.00% | 0.00 | 0 | 28 | 1.47 | 0.00 | 0.00 | 0.00 | 7/24/2026 | 7/27/2026 3:59:59 PM EST |
| 80.00 | 0.00 | 0.50 | 0.25 | 0.09 | 0.00 | 0.00% | 0.00 | 0 | 128 | 1.55 | 0.00 | 0.00 | 0.00 | 6/16/2026 | 7/27/2026 3:59:59 PM EST |
| 85.00 | 0.00 | 0.50 | 0.25 | 0.10 | 0.00 | 0.00% | 0.00 | 0 | 16 | 1.61 | 0.00 | 0.00 | 0.00 | 6/16/2026 | 7/27/2026 3:59:59 PM EST |
| 90.00 | 0.00 | 0.50 | 0.25 | 0.15 | 0.00 | 0.00% | 0.00 | 0 | 16 | 1.67 | 0.00 | 0.00 | 0.00 | 4/13/2026 | 7/27/2026 3:59:59 PM EST |
| 95.00 | 0.00 | 0.50 | 0.25 | 0.10 | 0.00 | 0.00% | 0.00 | 0 | 15 | 1.73 | 0.00 | 0.00 | 0.00 | 6/16/2026 | 7/27/2026 3:59:59 PM EST |
| 100.00 | 0.00 | 0.20 | 0.10 | 0.09 | 0.00 | 0.00% | 0.00 | 0 | 54 | 1.54 | 0.00 | 0.00 | 0.00 | 4/13/2026 | 7/27/2026 3:59:59 PM EST |
| 105.00 | 0.00 | 0.50 | 0.25 | % | 0.00 | 0 | 2 | 1.84 | 0.00 | 0.00 | 0.00 | 7/27/2026 3:59:59 PM EST | |||
| 110.00 | 0.00 | 0.50 | 0.25 | % | 0.00 | 0 | 7 | 1.89 | 0.00 | 0.00 | 0.00 | 7/27/2026 3:59:59 PM EST | |||
| 115.00 | 0.00 | 0.50 | 0.25 | % | 0.00 | 0 | 3 | 1.93 | 0.00 | 0.00 | 0.00 | 7/27/2026 3:59:59 PM EST | |||
| 120.00 | 0.00 | 0.50 | 0.25 | % | 0.00 | 0 | 17 | 1.98 | 0.00 | 0.00 | 0.00 | 7/27/2026 3:59:59 PM EST | |||
| 125.00 | 0.00 | 0.50 | 0.25 | % | 0.00 | 0 | 2 | 2.02 | 0.00 | 0.00 | 0.00 | 7/27/2026 3:59:59 PM EST | |||
| 130.00 | 0.00 | 0.50 | 0.25 | % | 0.00 | 0 | 0 | 2.06 | 0.00 | 0.00 | 0.00 | 7/27/2026 3:59:59 PM EST | |||
| 135.00 | 0.00 | 0.50 | 0.25 | % | 0.00 | 0 | 5 | 2.09 | 0.00 | 0.00 | 0.00 | 7/27/2026 3:59:59 PM EST | |||
| 140.00 | 0.00 | 0.50 | 0.25 | % | 0.00 | 0 | 0 | 2.13 | 0.00 | 0.00 | 0.00 | 7/27/2026 3:59:59 PM EST | |||
| 145.00 | 0.00 | 0.50 | 0.25 | % | 0.00 | 0 | 0 | 2.16 | 0.00 | 0.00 | 0.00 | 7/27/2026 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 15.00 | 0.00 | 0.20 | 0.10 | % | 0.01 | 0 | 0 | 1.11 | -0.02 | 0.00 | -0.01 | 7/27/2026 3:59:59 PM EST | |||
| 17.50 | 0.00 | 0.65 | 0.33 | 0.20 | 0.00 | 0.00% | 0.02 | 0 | 3 | 1.20 | -0.03 | 0.01 | -0.01 | 7/23/2026 | 7/27/2026 3:59:59 PM EST |
| 20.00 | 0.20 | 0.65 | 0.43 | 0.40 | 0.00 | 0.00% | 0.02 | 0 | 74 | 0.82 | -0.08 | 0.02 | -0.02 | 7/24/2026 | 7/27/2026 3:59:59 PM EST |
| 22.50 | 0.50 | 0.70 | 0.60 | 0.70 | -0.08 | -10.26% | 0.03 | 4 | 368 | 0.72 | -0.14 | 0.03 | -0.02 | 7/27/2026 | 7/27/2026 3:59:59 PM EST |
| 25.00 | 1.15 | 1.30 | 1.23 | 1.30 | -0.12 | -8.46% | 0.05 | 4 | 540 | 0.71 | -0.23 | 0.04 | -0.03 | 7/27/2026 | 7/27/2026 3:59:59 PM EST |
| 30.00 | 3.20 | 3.50 | 3.35 | 3.09 | -0.91 | -22.75% | 0.11 | 7 | 2,095 | 0.68 | -0.49 | 0.06 | -0.03 | 7/27/2026 | 7/27/2026 3:59:59 PM EST |
| 35.00 | 6.20 | 7.00 | 6.60 | 6.20 | -1.10 | -15.07% | 0.19 | 230 | 664 | 0.61 | -0.71 | 0.05 | -0.03 | 7/27/2026 | 7/27/2026 3:59:59 PM EST |
| 40.00 | 10.90 | 11.40 | 11.15 | 10.95 | 0.00 | 0.00% | 0.28 | 0 | 714 | 0.75 | -0.84 | 0.03 | -0.02 | 7/2/2026 | 7/27/2026 3:59:59 PM EST |
| 45.00 | 15.20 | 16.40 | 15.80 | 16.53 | +3.63 | +28.14% | 0.35 | 1 | 187 | 0.97 | -0.91 | 0.02 | -0.01 | 7/27/2026 | 7/27/2026 3:59:59 PM EST |
| 50.00 | 20.10 | 21.30 | 20.70 | 20.43 | 0.00 | 0.00% | 0.41 | 0 | 58 | 1.09 | -0.96 | 0.01 | -0.01 | 7/16/2026 | 7/27/2026 3:59:59 PM EST |
| 55.00 | 24.60 | 26.90 | 25.75 | 25.75 | 0.00 | 0.00% | 0.47 | 0 | 25 | 1.39 | -0.98 | 0.00 | 0.00 | 7/8/2026 | 7/27/2026 3:59:59 PM EST |
| 60.00 | 29.60 | 32.00 | 30.80 | 31.44 | 0.00 | 0.00% | 0.51 | 0 | 45 | 1.48 | -0.99 | 0.00 | 0.00 | 7/21/2026 | 7/27/2026 3:59:59 PM EST |
| 65.00 | 34.60 | 36.90 | 35.75 | 39.10 | 0.00 | 0.00% | 0.55 | 0 | 0 | 1.59 | -1.00 | 0.00 | 0.00 | 7/23/2026 | 7/27/2026 3:59:59 PM EST |
| 70.00 | 39.60 | 41.90 | 40.75 | 41.44 | 0.00 | 0.00% | 0.58 | 0 | 15 | 1.69 | -1.00 | 0.00 | 0.00 | 7/21/2026 | 7/27/2026 3:59:59 PM EST |
| 75.00 | 44.60 | 46.90 | 45.75 | 45.22 | 0.00 | 0.00% | 0.61 | 0 | 14 | 1.78 | -1.00 | 0.00 | 0.00 | 7/1/2026 | 7/27/2026 3:59:59 PM EST |
| 80.00 | 49.60 | 51.90 | 50.75 | 47.76 | 0.00 | 0.00% | 0.63 | 0 | 12 | 1.87 | -1.00 | 0.00 | 0.00 | 6/16/2026 | 7/27/2026 3:59:59 PM EST |
| 85.00 | 54.60 | 56.90 | 55.75 | 52.75 | 0.00 | 0.00% | 0.66 | 0 | 4 | 1.95 | -1.00 | 0.00 | 0.00 | 6/16/2026 | 7/27/2026 3:59:59 PM EST |
| 90.00 | 59.60 | 61.90 | 60.75 | 57.79 | 0.00 | 0.00% | 0.68 | 0 | 5 | 2.03 | -1.00 | 0.00 | 0.00 | 6/16/2026 | 7/27/2026 3:59:59 PM EST |
| 95.00 | 64.60 | 66.90 | 65.75 | 66.47 | 0.00 | 0.00% | 0.69 | 0 | 4 | 2.10 | -1.00 | 0.00 | 0.00 | 7/21/2026 | 7/27/2026 3:59:59 PM EST |
| 100.00 | 69.60 | 71.90 | 70.75 | 74.07 | 0.00 | 0.00% | 0.71 | 0 | 2 | 2.16 | -1.00 | 0.00 | 0.00 | 7/23/2026 | 7/27/2026 3:59:59 PM EST |
| 105.00 | 74.60 | 76.90 | 75.75 | % | 0.72 | 0 | 0 | 2.23 | -1.00 | 0.00 | 0.00 | 7/27/2026 3:59:59 PM EST | |||
| 110.00 | 79.60 | 81.90 | 80.75 | % | 0.73 | 0 | 0 | 2.29 | -1.00 | 0.00 | 0.00 | 7/27/2026 3:59:59 PM EST | |||
| 115.00 | 84.60 | 86.90 | 85.75 | % | 0.75 | 0 | 0 | 2.34 | -1.00 | 0.00 | 0.00 | 7/27/2026 3:59:59 PM EST | |||
| 120.00 | 89.60 | 91.90 | 90.75 | % | 0.76 | 0 | 0 | 2.40 | -1.00 | 0.00 | 0.00 | 7/27/2026 3:59:59 PM EST | |||
| 125.00 | 94.60 | 96.90 | 95.75 | % | 0.77 | 0 | 0 | 2.45 | -1.00 | 0.00 | 0.00 | 7/27/2026 3:59:59 PM EST | |||
| 130.00 | 99.60 | 101.90 | 100.75 | % | 0.78 | 0 | 0 | 2.50 | -1.00 | 0.00 | 0.00 | 7/27/2026 3:59:59 PM EST | |||
| 135.00 | 104.60 | 106.90 | 105.75 | % | 0.78 | 0 | 0 | 2.55 | -1.00 | 0.00 | 0.00 | 7/27/2026 3:59:59 PM EST | |||
| 140.00 | 109.60 | 111.90 | 110.75 | % | 0.79 | 0 | 0 | 2.59 | -1.00 | 0.00 | 0.00 | 7/27/2026 3:59:59 PM EST | |||
| 145.00 | 114.60 | 116.90 | 115.75 | % | 0.80 | 0 | 0 | 2.64 | -1.00 | 0.00 | 0.00 | 7/27/2026 3:59:59 PM EST |