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 | 7.90 | 9.90 | 8.90 | % | 0.71 | 0 | 0 | 4.24 | 1.00 | 0.00 | 0.00 | 10/7/2026 3:59:55 PM EST | |||
| 15.00 | 5.30 | 7.50 | 6.40 | 6.35 | 0.00 | 0.00% | 0.43 | 0 | 7 | 3.30 | 1.00 | 0.00 | 0.00 | 10/6/2026 | 10/7/2026 3:59:55 PM EST |
| 17.50 | 1.55 | 4.90 | 3.23 | 3.85 | 0.00 | 0.00% | 0.18 | 0 | 5 | 2.26 | 1.00 | 0.00 | 0.00 | 10/6/2026 | 10/7/2026 3:59:55 PM EST |
| 20.00 | 0.40 | 2.25 | 1.33 | 4.21 | 0.00 | 0.00% | 0.07 | 0 | 20 | 1.27 | 0.82 | 0.20 | -0.02 | 8/21/2026 | 10/7/2026 3:59:55 PM EST |
| 22.50 | 0.00 | 0.25 | 0.13 | 0.15 | 0.00 | 0.00% | 0.01 | 5 | 32 | 0.55 | 0.15 | 0.19 | -0.02 | 10/7/2026 | 10/7/2026 3:59:55 PM EST |
| 25.00 | 0.00 | 0.75 | 0.38 | 0.05 | 0.00 | 0.00% | 0.02 | 0 | 62 | 1.50 | 0.00 | 0.01 | 0.00 | 9/25/2026 | 10/7/2026 3:59:55 PM EST |
| 27.50 | 0.00 | 0.75 | 0.38 | % | 0.01 | 0 | 0 | 1.91 | 0.00 | 0.00 | 0.00 | 10/7/2026 3:59:55 PM EST | |||
| 30.00 | 0.00 | 0.40 | 0.20 | % | 0.01 | 0 | 0 | 1.85 | 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 | 0 | 2.56 | 0.00 | 0.00 | 0.00 | 10/7/2026 3:59:55 PM EST | |||
| 35.00 | 0.00 | 0.75 | 0.38 | % | 0.01 | 0 | 0 | 2.82 | 0.00 | 0.00 | 0.00 | 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 | 3.43 | 0.00 | 0.00 | 0.00 | 10/7/2026 3:59:55 PM EST | |||
| 15.00 | 0.00 | 0.75 | 0.38 | % | 0.03 | 0 | 0 | 2.53 | 0.00 | 0.00 | 0.00 | 10/7/2026 3:59:55 PM EST | |||
| 17.50 | 0.00 | 0.60 | 0.30 | % | 0.02 | 0 | 0 | 1.56 | 0.00 | 0.00 | 0.00 | 10/7/2026 3:59:55 PM EST | |||
| 20.00 | 0.00 | 0.15 | 0.08 | 0.05 | 0.00 | 0.00% | 0.00 | 0 | 36 | 0.41 | -0.18 | 0.20 | -0.02 | 9/30/2026 | 10/7/2026 3:59:55 PM EST |
| 22.50 | 0.55 | 2.05 | 1.30 | 1.00 | 0.00 | 0.00% | 0.06 | 0 | 62 | 0.91 | -0.85 | 0.19 | -0.02 | 10/6/2026 | 10/7/2026 3:59:55 PM EST |
| 25.00 | 3.00 | 4.90 | 3.95 | 2.20 | 0.00 | 0.00% | 0.16 | 0 | 34 | 1.74 | -1.00 | 0.01 | 0.00 | 9/11/2026 | 10/7/2026 3:59:55 PM EST |
| 27.50 | 5.50 | 7.30 | 6.40 | 4.49 | 0.00 | 0.00% | 0.23 | 0 | 17 | 2.08 | -1.00 | 0.00 | 0.00 | 8/28/2026 | 10/7/2026 3:59:55 PM EST |
| 30.00 | 7.90 | 9.70 | 8.80 | % | 0.29 | 0 | 0 | 2.33 | -1.00 | 0.00 | 0.00 | 10/7/2026 3:59:55 PM EST | |||
| 32.50 | 10.30 | 12.20 | 11.25 | % | 0.35 | 0 | 0 | 2.64 | -1.00 | 0.00 | 0.00 | 10/7/2026 3:59:55 PM EST | |||
| 35.00 | 12.40 | 14.80 | 13.60 | % | 0.39 | 0 | 0 | 3.02 | -1.00 | 0.00 | 0.00 | 10/7/2026 3:59:55 PM EST |