Mark W. Helderman

Companies

• ONEOKBoard member Feb 20, 2019 to now¹

Holdings

Stock this person has reported owning, from the forms officers and directors file with the SEC. See the biggest insider stakes.

Shares held

• ONEOK OKE38,704 shares²$3.6M at $93.27May 20, 2026

As of each latest filing. The line shows shares held over time.

Recent filings

• May 20, 2026Granted 3,039 shares at $92.15 of ONEOK²
• May 23, 2025Granted 3,450 shares at $81.14 of ONEOK³
• May 22, 2024Granted 3,429 shares at $81.66 of ONEOK⁴
• May 24, 2023Granted 1,708 shares at $58.54 of ONEOK⁵
• May 24, 2023Granted 2,562 shares at $58.54 of ONEOK⁵
• May 25, 2022Granted 1,535 shares at $65.14 of ONEOK⁶
• May 25, 2022Granted 2,302 shares at $65.14 of ONEOK⁶
• Mar 3, 2022Sold 30,000 shares at $67.27 of ONEOK⁷