Mark Helderman

No open positions remaining

Net worth: 3 M $ as of 30/09/2026

68 year

56 connections

Consumer Services

Industrial Services

Finance

Profile

Mr. Mark W.
Helderman is an Independent Director at ONEOK, Inc. He is on the Board of Directors at ONEOK, Inc. Mr. Helderman was previously employed as an Independent Director by ONEOK, Inc. (Old) and a Managing Director & Portfolio Manager by Sasco Capital, Inc. He received his undergraduate degree from the University of Dayton and a graduate degree from the University of Oklahoma.

Known holdings in public companies

Company	Date	Number of shares	Valuation	Valuation date
0%	20/05/2026	38,704 ( 0% )	3 M $	30/09/2026

Mark Helderman active positions

Companies	Position	Start

All active positions of Mark Helderman

Former positions of Mark Helderman

Companies	Position	End
Sasco Capital, Inc. Sasco Capital, Inc. Investment ManagersFinance Sasco Capital employs a time-tested, contrarian approach to value investing in the Small, Smid and Mid-Cap market segments. The firm utilizes fundamental, bottom-up security analysis based on a proprietary screening process, individual company research, and meetings with senior management. They invest in out-of-favor, underperforming companies with restructuring and transformational potential. The investment strategy has a long-term investment horizon and low turnover.	Portfolio Manager-Equities	01/01/2019
ONEOK, INC.	Director/Board Member	-

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Education of Mark Helderman

Experiences
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Linked companies

Private companies	4
ONEOK, Inc. ONEOK, Inc. Oil & Gas PipelinesIndustrial Services Engages in gathering, processing, sale, transportation and storage of natural gas	Industrial Services
Sasco Capital, Inc. Sasco Capital, Inc. Investment ManagersFinance Sasco Capital employs a time-tested, contrarian approach to value investing in the Small, Smid and Mid-Cap market segments. The firm utilizes fundamental, bottom-up security analysis based on a proprietary screening process, individual company research, and meetings with senior management. They invest in out-of-favor, underperforming companies with restructuring and transformational potential. The investment strategy has a long-term investment horizon and low turnover.	Finance
University of Dayton University of Dayton Other Consumer ServicesConsumer Services Functions as a College/University	Consumer Services
University of Oklahoma University of Oklahoma Other Consumer ServicesConsumer Services Functions as a College/University	Consumer Services