Murphy Oil Corporation
An oil and gas exploration and production company, Murphy Oil pumps crude and natural gas mainly from the Gulf of America and the Eagle Ford Shale in the U.S., plus onshore fields in Canada and projects in Vietnam, Brazil, Brunei and Côte d'Ivoire. The family business traces to Arkansas timber and banking, entering oil in 1921 at the Smackover Field; in 1950 the Murphy siblings pooled their interests into the Murphy Corporation, later renamed Murphy Oil. In 1953 it backed "Mr. Charlie," the world's first submersible offshore drilling barge.
Estimated from filings — the split-adjusted price range over the quarters each manager built the position. A range, not a fill price; 13F reports a quarter-end snapshot, not a trade date.