This orange stock certificate from Sinclair Oil Corporation, issued in 1967, features cancellation holes, stamps, and handwriting, reflecting its authenticity and historical use.

Sinclair Oil Corporation is an American petroleum company founded by Harry F. Sinclair on May 1, 1916, through the merger of 11 small petroleum companies, originally under the name Sinclair Oil and Refining Corporation. The company reincorporated in Wyoming in 1976.

In September 1919, Harry F. Sinclair restructured the company, merging Sinclair Oil and Refining Corporation, Sinclair Gulf Corporation, and 26 other related entities into Sinclair Consolidated Oil Corporation. This entity was renamed Consolidated Oil Corporation in 1932 and then Sinclair Oil Corporation in 1943.

During the Great Depression, Sinclair sold its remaining interest in its pipeline subsidiary to Standard Oil Company (Indiana) for $72.5 million and retired various promissory notes. The company also acquired several struggling petroleum companies, such as Prairie Oil and Gas and Rio Grande Oil Company, expanding its operations significantly.

Sinclair sponsored popular dinosaur exhibits at both the 1933-1934 Chicago World's Fair and the 1964-1965 New York World's Fair, featuring life-size dinosaur replicas and promotional merchandise, including the iconic brontosaurus logo.

Despite being a Fortune 500 company, Sinclair faced declining rankings and was acquired by the Atlantic Richfield Company (ARCO) in 1969. Federal antitrust provisions required the divestiture of certain Sinclair assets, leading to the sale of its East Coast operations to BP. In 1976, ARCO sold certain assets to Robert (Earl) Holding, who retained the Sinclair brand and logo.

Today, Sinclair is headquartered in Salt Lake City and operates 2,607 filling stations in 20 states across the Western and Midwestern United States. The company operates two refineries in Wyoming and continues to use its iconic green dinosaur logo, "Dino." Sinclair remains a significant player in the petroleum industry, maintaining a strong brand presence with products like "Dino Supreme" and "Dino" gasoline.

This stock certificate offers a glimpse into the rich history and evolution of Sinclair Oil Corporation, reflecting its growth, challenges, and enduring legacy in the American petroleum industry.