Options Chain for COSTAR GROUP INC COM (CSGP) - $49.07 as of 2/20/2026 2:53:39 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 30.00 | 18.20 | 22.00 | 20.10 | % | 0.67 | 0 | 0 | 2.00 | 1.00 | 0.00 | -0.01 | 2/20/2026 4:00:16 PM EST | |||
| 35.00 | 14.40 | 16.70 | 15.55 | % | 0.44 | 0 | 0 | 1.45 | 0.96 | 0.01 | -0.02 | 2/20/2026 4:00:16 PM EST | |||
| 40.00 | 10.00 | 11.60 | 10.80 | 9.80 | 0.00 | 0.00% | 0.27 | 0 | 20 | 1.03 | 0.89 | 0.02 | -0.04 | 2/19/2026 | 2/20/2026 4:00:16 PM EST |
| 45.00 | 6.20 | 6.70 | 6.45 | 6.45 | +0.95 | +17.28% | 0.14 | 7 | 150 | 0.63 | 0.75 | 0.04 | -0.06 | 2/20/2026 | 2/20/2026 4:00:16 PM EST |
| 50.00 | 3.30 | 3.70 | 3.50 | 3.40 | +0.60 | +21.43% | 0.07 | 18 | 3,779 | 0.63 | 0.54 | 0.05 | -0.06 | 2/20/2026 | 2/20/2026 4:00:16 PM EST |
| 55.00 | 1.40 | 1.65 | 1.53 | 1.49 | +0.29 | +24.17% | 0.03 | 90 | 925 | 0.59 | 0.32 | 0.04 | -0.06 | 2/20/2026 | 2/20/2026 4:00:16 PM EST |
| 60.00 | 0.55 | 0.80 | 0.68 | 0.85 | +0.35 | +70.00% | 0.01 | 278 | 2,213 | 0.61 | 0.17 | 0.03 | -0.04 | 2/20/2026 | 2/20/2026 4:00:16 PM EST |
| 65.00 | 0.20 | 0.55 | 0.38 | 0.31 | +0.08 | +34.79% | 0.01 | 108 | 828 | 0.66 | 0.08 | 0.02 | -0.03 | 2/20/2026 | 2/20/2026 4:00:16 PM EST |
| 70.00 | 0.05 | 0.20 | 0.13 | 0.15 | -0.15 | -50.00% | 0.00 | 1 | 1,394 | 0.63 | 0.04 | 0.01 | -0.01 | 2/20/2026 | 2/20/2026 4:00:16 PM EST |
| 75.00 | 0.00 | 0.35 | 0.18 | 0.14 | -0.06 | -30.00% | 0.00 | 5 | 1,855 | 0.91 | 0.01 | 0.00 | -0.01 | 2/20/2026 | 2/20/2026 4:00:16 PM EST |
| 80.00 | 0.00 | 0.30 | 0.15 | 0.09 | -0.07 | -43.75% | 0.00 | 12 | 288 | 0.87 | 0.01 | 0.00 | 0.00 | 2/20/2026 | 2/20/2026 4:00:16 PM EST |
| 85.00 | 0.00 | 0.30 | 0.15 | 0.05 | 0.00 | 0.00% | 0.00 | 0 | 327 | 1.08 | 0.00 | 0.00 | 0.00 | 2/12/2026 | 2/20/2026 4:00:16 PM EST |
| 90.00 | 0.00 | 0.80 | 0.40 | 0.15 | 0.00 | 0.00% | 0.00 | 0 | 1,703 | 1.43 | 0.00 | 0.00 | 0.00 | 2/11/2026 | 2/20/2026 4:00:16 PM EST |
| 95.00 | 0.00 | 0.80 | 0.40 | 0.20 | 0.00 | 0.00% | 0.00 | 0 | 385 | 1.52 | 0.00 | 0.00 | 0.00 | 1/23/2026 | 2/20/2026 4:00:16 PM EST |
| 100.00 | 0.00 | 0.75 | 0.38 | 0.10 | 0.00 | 0.00% | 0.00 | 0 | 432 | 1.59 | 0.00 | 0.00 | 0.00 | 1/28/2026 | 2/20/2026 4:00:16 PM EST |
| 105.00 | 0.00 | 0.20 | 0.10 | 0.05 | +0.02 | +66.67% | 0.00 | 2 | 377 | 1.32 | 0.00 | 0.00 | 0.00 | 2/20/2026 | 2/20/2026 4:00:16 PM EST |
| 110.00 | 0.00 | 0.75 | 0.38 | 1.80 | 0.00 | 0.00% | 0.00 | 0 | 375 | 1.74 | 0.00 | 0.00 | 0.00 | 9/15/2025 | 2/20/2026 4:00:16 PM EST |
| 115.00 | 0.00 | 0.75 | 0.38 | 0.46 | 0.00 | 0.00% | 0.00 | 0 | 16 | 1.81 | 0.00 | 0.00 | 0.00 | 10/24/2025 | 2/20/2026 4:00:16 PM EST |
| 120.00 | 0.00 | 0.75 | 0.38 | 1.05 | 0.00 | 0.00% | 0.00 | 0 | 8 | 1.88 | 0.00 | 0.00 | 0.00 | 9/9/2025 | 2/20/2026 4:00:16 PM EST |
| 125.00 | 0.00 | 0.75 | 0.38 | 0.80 | 0.00 | 0.00% | 0.00 | 0 | 1 | 1.95 | 0.00 | 0.00 | 0.00 | 9/3/2025 | 2/20/2026 4:00:16 PM EST |
| 130.00 | 0.00 | 0.75 | 0.38 | % | 0.00 | 0 | 0 | 2.00 | 0.00 | 0.00 | 0.00 | 2/20/2026 4:00:16 PM EST | |||
| 135.00 | 0.00 | 0.75 | 0.38 | % | 0.00 | 0 | 0 | 2.06 | 0.00 | 0.00 | 0.00 | 2/20/2026 4:00:16 PM EST | |||
| 140.00 | 0.00 | 0.75 | 0.38 | % | 0.00 | 0 | 0 | 2.12 | 0.00 | 0.00 | 0.00 | 2/20/2026 4:00:16 PM EST | |||
| 145.00 | 0.00 | 0.75 | 0.38 | % | 0.00 | 0 | 0 | 2.17 | 0.00 | 0.00 | 0.00 | 2/20/2026 4:00:16 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 30.00 | 0.00 | 0.95 | 0.48 | % | 0.02 | 0 | 0 | 1.56 | 0.00 | 0.00 | -0.01 | 2/20/2026 4:00:16 PM EST | |||
| 35.00 | 0.05 | 0.30 | 0.18 | 0.20 | 0.00 | 0.00% | 0.01 | 0 | 4 | 0.75 | -0.04 | 0.01 | -0.02 | 2/19/2026 | 2/20/2026 4:00:16 PM EST |
| 40.00 | 0.45 | 0.80 | 0.63 | 0.50 | -0.20 | -28.58% | 0.02 | 107 | 711 | 0.74 | -0.11 | 0.02 | -0.04 | 2/20/2026 | 2/20/2026 4:00:16 PM EST |
| 45.00 | 1.20 | 1.55 | 1.38 | 1.32 | -0.53 | -28.65% | 0.03 | 11 | 1,017 | 0.63 | -0.25 | 0.04 | -0.06 | 2/20/2026 | 2/20/2026 4:00:16 PM EST |
| 50.00 | 3.20 | 3.70 | 3.45 | 3.47 | -0.53 | -13.25% | 0.07 | 62 | 918 | 0.63 | -0.46 | 0.05 | -0.06 | 2/20/2026 | 2/20/2026 4:00:16 PM EST |
| 55.00 | 6.30 | 6.80 | 6.55 | 7.40 | 0.00 | 0.00% | 0.12 | 0 | 873 | 0.62 | -0.68 | 0.04 | -0.06 | 2/19/2026 | 2/20/2026 4:00:16 PM EST |
| 60.00 | 10.20 | 10.90 | 10.55 | 10.80 | -0.90 | -7.70% | 0.18 | 6 | 1,460 | 0.58 | -0.83 | 0.03 | -0.04 | 2/20/2026 | 2/20/2026 4:00:16 PM EST |
| 65.00 | 15.00 | 15.80 | 15.40 | 14.90 | -1.60 | -9.70% | 0.24 | 1 | 400 | 0.84 | -0.92 | 0.02 | -0.03 | 2/20/2026 | 2/20/2026 4:00:16 PM EST |
| 70.00 | 18.60 | 20.90 | 19.75 | 21.38 | 0.00 | 0.00% | 0.28 | 0 | 176 | 1.02 | -0.96 | 0.01 | -0.01 | 2/19/2026 | 2/20/2026 4:00:16 PM EST |
| 75.00 | 23.40 | 26.50 | 24.95 | 9.70 | 0.00 | 0.00% | 0.33 | 0 | 19 | 1.34 | -0.99 | 0.00 | -0.01 | 1/22/2026 | 2/20/2026 4:00:16 PM EST |
| 80.00 | 29.80 | 30.60 | 30.20 | 28.20 | 0.00 | 0.00% | 0.38 | 0 | 28 | 1.17 | -0.99 | 0.00 | 0.00 | 2/4/2026 | 2/20/2026 4:00:16 PM EST |
| 85.00 | 33.20 | 37.00 | 35.10 | 16.90 | 0.00 | 0.00% | 0.41 | 0 | 3 | 1.74 | -1.00 | 0.00 | 0.00 | 12/31/2025 | 2/20/2026 4:00:16 PM EST |
| 90.00 | 38.20 | 42.00 | 40.10 | 9.60 | 0.00 | 0.00% | 0.45 | 0 | 0 | 1.85 | -1.00 | 0.00 | 0.00 | 10/3/2025 | 2/20/2026 4:00:16 PM EST |
| 95.00 | 43.20 | 46.90 | 45.05 | % | 0.47 | 0 | 0 | 1.93 | -1.00 | 0.00 | 0.00 | 2/20/2026 4:00:16 PM EST | |||
| 100.00 | 48.20 | 51.90 | 50.05 | 20.55 | 0.00 | 0.00% | 0.50 | 0 | 0 | 2.03 | -1.00 | 0.00 | 0.00 | 10/8/2025 | 2/20/2026 4:00:16 PM EST |
| 105.00 | 53.20 | 56.90 | 55.05 | % | 0.52 | 0 | 0 | 2.12 | -1.00 | 0.00 | 0.00 | 2/20/2026 4:00:16 PM EST | |||
| 110.00 | 58.20 | 61.90 | 60.05 | 31.10 | 0.00 | 0.00% | 0.55 | 0 | 0 | 2.21 | -1.00 | 0.00 | 0.00 | 10/24/2025 | 2/20/2026 4:00:16 PM EST |
| 115.00 | 63.20 | 66.90 | 65.05 | % | 0.57 | 0 | 0 | 2.29 | -1.00 | 0.00 | 0.00 | 2/20/2026 4:00:16 PM EST | |||
| 120.00 | 68.20 | 71.90 | 70.05 | % | 0.58 | 0 | 0 | 2.36 | -1.00 | 0.00 | 0.00 | 2/20/2026 4:00:16 PM EST | |||
| 125.00 | 73.20 | 76.90 | 75.05 | % | 0.60 | 0 | 0 | 2.44 | -1.00 | 0.00 | 0.00 | 2/20/2026 4:00:16 PM EST | |||
| 130.00 | 78.20 | 81.90 | 80.05 | % | 0.62 | 0 | 0 | 2.51 | -1.00 | 0.00 | 0.00 | 2/20/2026 4:00:16 PM EST | |||
| 135.00 | 83.20 | 86.90 | 85.05 | % | 0.63 | 0 | 0 | 2.57 | -1.00 | 0.00 | 0.00 | 2/20/2026 4:00:16 PM EST | |||
| 140.00 | 88.20 | 91.90 | 90.05 | % | 0.64 | 0 | 0 | 2.64 | -1.00 | 0.00 | 0.00 | 2/20/2026 4:00:16 PM EST | |||
| 145.00 | 93.20 | 96.90 | 95.05 | % | 0.66 | 0 | 0 | 2.70 | -1.00 | 0.00 | 0.00 | 2/20/2026 4:00:16 PM EST |