Continental Resources' (CLR)  Chief Operating Officer Tony Maranto has resigned from his position just five weeks after joining the firm.

The Oklahoma City-based oil and services company confirmed his resignation via a one-sentence regulatory filing.

"On June 5, 2017, Tony C. Maranto resigned as Chief Operating Officer of Continental Resources, Inc. (the "Company"), effective June 5, 2017. Mr. Maranto's duties will presently be absorbed by the Company's management team," the SEC filing said.

Maranto, 57, joined Continental on May 1. He was previously VP and general manager at EOG Resources (EOG) .

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