Options Chain for GENTEX CORP COM (GNTX) - $21.55 as of 10/7/2026 6:02:51 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 12.50 | 6.60 | 10.80 | 8.70 | % | 0.70 | 0 | 0 | 2.39 | 1.00 | 0.00 | 0.00 | 10/7/2026 3:59:55 PM EST | |||
| 15.00 | 5.30 | 8.30 | 6.80 | % | 0.45 | 0 | 0 | 1.81 | 1.00 | 0.00 | 0.00 | 10/7/2026 3:59:55 PM EST | |||
| 17.50 | 3.00 | 5.00 | 4.00 | % | 0.23 | 0 | 0 | 0.97 | 0.97 | 0.03 | -0.01 | 10/7/2026 3:59:55 PM EST | |||
| 20.00 | 1.05 | 2.60 | 1.83 | 2.10 | 0.00 | 0.00% | 0.09 | 0 | 4 | 0.62 | 0.76 | 0.13 | -0.01 | 10/1/2026 | 10/7/2026 3:59:55 PM EST |
| 22.50 | 0.00 | 1.25 | 0.63 | 0.65 | 0.00 | 0.00% | 0.03 | 0 | 18 | 0.57 | 0.35 | 0.17 | -0.01 | 10/5/2026 | 10/7/2026 3:59:55 PM EST |
| 25.00 | 0.00 | 0.25 | 0.13 | 0.35 | 0.00 | 0.00% | 0.01 | 0 | 237 | 0.41 | 0.09 | 0.07 | 0.00 | 9/28/2026 | 10/7/2026 3:59:55 PM EST |
| 27.50 | 0.00 | 0.75 | 0.38 | % | 0.01 | 0 | 0 | 0.83 | 0.01 | 0.01 | 0.00 | 10/7/2026 3:59:55 PM EST | |||
| 30.00 | 0.00 | 0.75 | 0.38 | % | 0.01 | 0 | 0 | 0.99 | 0.00 | 0.00 | 0.00 | 10/7/2026 3:59:55 PM EST | |||
| 32.50 | 0.00 | 0.75 | 0.38 | 0.01 | 0.00 | 0.00% | 0.01 | 0 | 1 | 1.13 | 0.00 | 0.00 | 0.00 | 9/25/2026 | 10/7/2026 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 12.50 | 0.00 | 0.75 | 0.38 | % | 0.03 | 0 | 0 | 1.59 | 0.00 | 0.00 | 0.00 | 10/7/2026 3:59:55 PM EST | |||
| 15.00 | 0.00 | 0.20 | 0.10 | % | 0.01 | 0 | 0 | 0.78 | 0.00 | 0.00 | 0.00 | 10/7/2026 3:59:55 PM EST | |||
| 17.50 | 0.00 | 1.25 | 0.63 | 0.27 | 0.00 | 0.00% | 0.04 | 0 | 1 | 0.51 | -0.03 | 0.03 | -0.01 | 9/30/2026 | 10/7/2026 3:59:55 PM EST |
| 20.00 | 0.25 | 0.45 | 0.35 | 0.40 | 0.00 | 0.00% | 0.02 | 11 | 106 | 0.31 | -0.24 | 0.13 | -0.01 | 10/7/2026 | 10/7/2026 3:59:55 PM EST |
| 22.50 | 0.90 | 2.00 | 1.45 | 1.45 | 0.00 | 0.00% | 0.06 | 0 | 38 | 0.46 | -0.65 | 0.17 | -0.01 | 10/6/2026 | 10/7/2026 3:59:55 PM EST |
| 25.00 | 3.00 | 5.10 | 4.05 | % | 0.16 | 0 | 0 | 0.95 | -0.91 | 0.07 | 0.00 | 10/7/2026 3:59:55 PM EST | |||
| 27.50 | 5.40 | 7.50 | 6.45 | % | 0.23 | 0 | 0 | 1.13 | -0.99 | 0.01 | 0.00 | 10/7/2026 3:59:55 PM EST | |||
| 30.00 | 7.90 | 9.90 | 8.90 | % | 0.30 | 0 | 0 | 1.27 | -1.00 | 0.00 | 0.00 | 10/7/2026 3:59:55 PM EST | |||
| 32.50 | 10.30 | 13.20 | 11.75 | % | 0.36 | 0 | 0 | 1.75 | -1.00 | 0.00 | 0.00 | 10/7/2026 3:59:55 PM EST |