Hyliion Holdings Corp. 10-Q

Item 5. Other Information None. 22 Table of Contents Item 6. Exhibits Exhibit Number Description 3.1 Second Amended and Restated Certificate of Incorporation of Hyliion Holdings Corp. (incorporated by reference to Exhibit 3.1 to the Company’s Current Report on Form 8-K filed with the SEC on October 7, 2020). 3.2 Amended and Restated Bylaws of Hyliion Holdings Corp. (incorporated by reference to Exhibit 3.2 to the Company’s Current Report on Form 8-K filed with the SEC on October 7, 2020). 10.1 Hyliion 2020 Equity Incentive Plan, Form of PSU Award Agreement (incorporated by reference to Exhibit 10.1 to the Company’s Current Report on Form 8-K filed with the SEC on April 1, 2021). 10.2 Hyliion 2020 Equity Incentive Plan, Form of Restricted Stock Award Agreement (incorporated by reference to Exhibit 10.1 to the Company’s Current Report on Form 8-K filed with the SEC on April 1, 2021). 31.1* Certification of Principal Executive Officer pursuant to Rules 13a-14(a) and 15d-14(a) under the Securities Exchange Act of 1934, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002. 31.2* Certification of Principal Financial Officer pursuant to Rules 13a-14(a) and 15d-14(a) under the Securities Exchange Act of 1934, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002. 32.1** Certification of Principal Executive Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002. 32.2** Certification of Principal Financial Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002. 101.INS* XBRL Instance Document 101.SCH* XBRL Taxonomy Extension Schema Document 101.CAL* XBRL Taxonomy Extension Calculation Linkbase Document 101.DEF* XBRL Taxonomy Extension Definition Linkbase Document 101.LAB* XBRL Taxonomy Extension Label Linkbase Document 101.PRE* XBRL Taxonomy Extension Presentation Linkbase Document * Filed herewith. ** Furnished herewith. 23 Table of Contents SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized on this 17th day of May 2021. HYLIION HOLDINGS CORP. /s/ Thomas Healy Name: Thomas Healy Title: President and Chief Executive Officer (Principal Executive Officer) /s/ Sherri Baker Name: Sherri Baker Title: Chief Financial Officer (Principal Financial Officer) 24