Overseas Shipholding Group, Inc., together with its subsidiaries, owns and operates a fleet of oceangoing vessels in the United States. Its vessels are engaged in the transportation of crude oil, petroleum, and renewable transportation fuels in the United States flag trade. As of December 31, 2023, the company owned or operated a fleet of 21 vessels totaling an aggregate of approximately 1.5 million deadweight tons. It serves independent oil traders, refinery operators, and the United States and international government entities. Overseas Shipholding Group, Inc. was founded in 1948 and is headquartered in Tampa, Florida.