Tortoise Acquisition Corp. Announces September 28, 2020 Special Meeting to Approve Hyliion Business Combination

Tortoise Acquisition Corp. (NYSE: SHLL) (“TortoiseCorp”) today announced that the Special Meeting of Stockholders (the “Special Meeting”) to approve the pending business combination between TortoiseCorp and Hyliion Inc. (“Hyliion”) is scheduled to be held on Monday, September 28, 2020, at 9:30 am Eastern time. The Special Meeting will be completely virtual and conducted via live webcast. Holders of TortoiseCorp’s shares of Class A Common Stock and Class B Common Stock at the close of business on the record date of August 24, 2020 are entitled to notice of the virtual Special Meeting and to vote at the virtual Special Meeting.

TortoiseCorp filed its definitive proxy statement with the U.S. Securities and Exchange Commission (the “SEC”) and began mailing it to stockholders on September 8, 2020. The proxy statement is available on the Investor Information section of TortoiseCorp’s website, as well as www.sec.gov. TortoiseCorp stockholders are encouraged to read the definitive proxy materials, including, among other things, the reasons for TortoiseCorp’s Board of Directors’ unanimous recommendation that stockholders vote “FOR” the business combination and the other stockholder proposals set forth in the proxy materials as well as the background of the process that led to the pending business combination with Hyliion.

TortoiseCorp stockholders who need assistance in completing the proxy card, need additional copies of the proxy materials, or have questions regarding the Special Meeting may contact TortoiseCorp’s proxy solicitor, Morrow Sodali LLC, by telephone at [phone] or by email at [e-mail].

About Tortoise Acquisition Corp.

Tortoise Acquisition Corp. (NYSE: SHLL) is a special purpose acquisition company formed for the purpose of effecting a merger, stock exchange, acquisition, reorganization or similar business combination with one or more businesses. TortoiseCorp’s expertise spans across the entire energy and infrastructure value chain. Our strategy has been to combine with a company to take advantage of the global opportunities created by the energy transition including clean energy generation and storage, alternative fuels and transportation, technological advances and changes in energy policies.