TAMPA, Fla.--( BUSINESS WIRE )--Overseas Shipholding Group, Inc. (NYSE: OSG) (“OSG”), a provider of energy transportation services for crude oil and petroleum products in the U.S. Flag markets, today announced that it has exercised options to extend its bareboat charter agreements with American Shipping Company ASA (Oslo Stock Exchange: AMSC / OTCQX: ASCJF) for six vessels. The six bareboat charter extensions provide for additional three-year terms commencing in December 2023. With these extensions, seven vessels will continue on lease from AMSC – six with maturity dates aligned to end in December 2026 and one with a maturity of 2025.