| Filed | Form | Description | |
|---|---|---|---|
| 1/28/26 | 4/A | 4/A | → |
| 1/26/26 | 4 | 4 | → |
| 1/22/26 | 3 | 3 | → |
| 1/22/26 | 3 | 3 | → |
| 1/22/26 | 3 | 3 | → |
| 1/22/26 | 3 | 3 | → |
| ↓ | |||
A helix is a shape like a cylindrical coil spring or the thread of a machine screw. It is a type of smooth skew curve with tangent lines at a constant angle to a fixed axis.