InsidersTradesSigma
Total declarations
Company
▲ Purchases (0 ops.)
▼ Sales (1 ops.)
Insider track record
Board DirectorDisclosed buys
0
Disclosed sells
1
Not enough buy signals with a settled T+90 horizon to measure a track record yet.
Signal history
Browse the full record of transactions filed by Helderman Mark W, Director. Officer active across 1 company, notably Oneok INC /new/. In total, 6 disclosures have been published. Breakdown: 0 buy · 1 sell. Total volume traded: €1.8m. History available since 26 May 2021. The latest transaction was disclosed on 23 May 2025 (Attribution). Regulator: SEC (Form 4). The full history is free.
Companies and markets linked to Helderman Mark W
Open company profiles for insider transactions, fundamentals and analyst consensus when available.
Declarations6 total
3,450 shares@ US$81.149.1% of flowCommon Stock, par value $0.01SEC:0001039684-25-000075:0
3,429 shares@ US$81.6610.0% of flowCommon Stock, par value $0.01SEC:0001039684-24-000059:0
2,562 shares@ US$58.545.4% of flowCommon Stock, par value $.0.01SEC:0001766621-23-000001:0
2,302 shares@ US$65.140.0003% mcap6.4% of flowCommon Stock, par value $.0.01SEC:0001662823-22-000012:0
30,000 shares@ US$67.26566.9% of flowCommon Stock, par value $.0.01SEC:0001766621-22-000002:0
2,570 shares@ US$52.514.1% of flowCommon Stock, par value $.0.01SEC:0001766621-21-000001:0
6 of 6 declarations
About Helderman Mark W
Mark W. Helderman is a Director at ONEOK Inc. (New). He plays a key role in the governance of the company, contributing to strategy development and overseeing performance. His expertise in the energy sector is valuable for the company.
