Star Equity Holdings, Inc.

Proxy Statement/Prospectus described below under “Additional Information and Where to Find It.” You should not place undue reliance on these forward-looking statements, which are made only as of the date hereof or as of the dates indicated in the forward-looking statements. Star expressly disclaims any obligation or undertaking to release publicly any updates or revisions to any forward-looking statements contained herein to reflect any change in its expectations with regard thereto or any change in events, conditions or circumstances on which any such statements are based. This presentation does not purport to summarize all of the conditions, risks and other attributes of an investment in Star or Harte Hanks. Participants in the Solicitation Star, Harte Hanks, and their respective directors and certain of their executive officers and employees may be considered participants in the solicitation of proxies from Harte Hanks’s stockholders with respect to the proposed Merger under the rules of the SEC. Information about the directors and executive officers of Star is set forth in its Definitive Proxy Statement related to its 2026