HELDERMAN MARK W (CIK 1766621) reported 2 SEC Form 4 insider transactions across 1 companies over the past 18 months (most recent 2026-05-22). Recent activity: Buy OKE (3,039 shares), Buy OKE (3,450 shares). Source: SEC Form 4.
| Date | Company | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-05-22 | ONEOK INC /NEW/ (OKE) | Director | Buy | 3,039 | $280,044 |
| 2025-05-28 | ONEOK INC /NEW/ (OKE) | Director | Buy | 3,450 | $279,933 |
Source: SEC Form 4 filings · as of 2026-05-22