Current Report by Foreign Issuer (Form 6-K)

DIANA SHIPPING INC. ANNOUNCES THE SALE

OF A PANAMAX DRY BULK VESSEL, THE M/V SELINA

ATHENS, GREECE, June 16, 2025 - Diana Shipping Inc. (NYSE: DSX), (the "Company"), a global shipping company specializing in the ownership and bareboat charter-in of dry bulk vessels, today announced that it has signed, through a separate wholly-owned subsidiary, a Memorandum of Agreement to sell to an unaffiliated third party, the 2010-built Panamax vessel "Selina", with delivery to the buyer latest by August 15, 2025, for a sale price of approximately US$11.8 million before commissions.

Upon completion of the aforementioned sale, Diana Shipping Inc.'s fleet will consist of 36 dry bulk vessels (4 Newcastlemax, 8 Capesize, 4 Post-Panamax, 6 Kamsarmax, 5 Panamax and 9 Ultramax). The Company also expects to take delivery of two methanol dual fuel new-building Kamsarmax dry bulk vessels by the second half of 2027 and the first half of 2028, respectively. As of today, the combined carrying capacity of the Company's fleet, including the m/v Selina and excluding the two vessels not yet delivered, is approximately 4.1 million dwt with a weighted average age of 11.63 years. A table describing the current Diana Shipping Inc. fleet can be found on the Company's website, www.dianashippinginc.com. Information contained on the Company's website does not constitute a part of this press release.

About the Company

Diana Shipping Inc. is a global provider of shipping transportation services through its ownership and bareboat charter-in of dry bulk vessels. The Company's vessels are employed primarily on short to medium-term time charters and transport a range of dry bulk cargoes, including such commodities as iron ore, coal, grain and other materials along worldwide shipping routes.