Seanergy Announces Completion of United Maritime Corporation Spin-Off

July 6, 2022 – Glyfada, Greece – Seanergy Maritime Holdings Corp. (the “Company” or “Seanergy”) (NASDAQ: SHIP) reported today that it has completed the spin-off of its wholly-owned subsidiary, United Maritime Corporation (United”), effective July 5, 2022. The Company’s shareholders received one United share for every 118 shares of Seanergy held at the close of business on June 28, 2022.

Fractional common shares of United were not distributed. Instead, the distribution agent will aggregate fractional common shares into whole shares, sell such whole shares in the open market
at prevailing rates promptly and distribute the net cash proceeds from the sales pro rata to each holder who would otherwise have been entitled to receive fractional common shares in the
distribution.

Additional information about United and the spin-off transaction can be found in the United registration statement filed pursuant to the Securities Exchange Act of 1934 on Form 20-F, which is
available at www.sec.gov or at https://www.unitedmaritime.gr/en under Investors/SEC Filings.

About Seanergy Maritime Holdings Corp.
Seanergy Maritime Holdings Corp. is the only pure-play Capesize ship-owner publicly listed in the US. Seanergy provides marine dry bulk transportation services through a modern fleet of Capesize vessels. The Company’s operating fleet consists of 17 Capesize vessels with an average age of approximately 12 years and aggregate cargo carrying capacity of approximately 3,020,012 dwt.

The Company is incorporated in the Marshall Islands and has executive offices in Glyfada, Greece.
The Company’s common shares trade on the Nasdaq Capital Market under the symbol “SHIP”.
Please visit our company website at: www.seanergymaritime.com.