Results of Operations and Financial Condition. On May 12, 2026, Hyliion Holdings Corp. (the “Company”) issued a press release announcing certain financial and other results for the quarter ended March 31, 2026. The full text of the press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated herein by reference. The information furnished in this Current Report on Form 8-K (including Exhibit 99.1) shall not be deemed “filed” for purposes of Section 18 of th…

Results of Operations and Financial Condition. On February 24, 2026, Hyliion Holdings Corp. (the “Company”) issued a press release announcing certain financial and other results for the quarter ended December 31, 2025. The full text of the press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated herein by reference. The information furnished in this Current Report on Form 8-K (including Exhibit 99.1) shall not be deemed “filed” for purposes of Section…

Results of Operations and Financial Condition. On November 11, 2025, Hyliion Holdings Corp. (the “Company”) issued a press release announcing certain financial and other results for the quarter ended September 30, 2025. The full text of the press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated herein by reference. The information furnished in this Current Report on Form 8-K (including Exhibit 99.1) shall not be deemed “filed” for purposes of Section…

Results of Operations and Financial Condition. On August 12, 2025, Hyliion Holdings Corp. (the “Company”) issued a press release announcing certain financial and other results for the quarter ended June 30, 2025. The full text of the press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated herein by reference. The information furnished in this Current Report on Form 8-K (including Exhibit 99.1) shall not be deemed “filed” for purposes of Section 18 of…

Results of Operations and Financial Condition. On May 13, 2025, Hyliion Holdings Corp. (the “Company”) issued a press release announcing certain financial and other results for the quarter ended March 31, 2025. The full text of the press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated herein by reference. The information furnished in this Current Report on Form 8-K (including Exhibit 99.1) shall not be deemed “filed” for purposes of Section 18 of th…

Results of Operations and Financial Condition. On February 25, 2025, Hyliion Holdings Corp. (the “Company”) issued a press release announcing certain financial and other results for the quarter ended December 31, 2024. The full text of the press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated herein by reference. The information furnished in this Current Report on Form 8-K (including Exhibit 99.1) shall not be deemed “filed” for purposes of Section…

Results of Operations and Financial Condition. On November 14, 2024, Hyliion Holdings Corp. (the “Company”) issued a press release announcing certain financial and other results for the quarter ended September 30, 2024. The full text of the press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated herein by reference. The information furnished in this Current Report on Form 8-K (including Exhibit 99.1) shall not be deemed “filed” for purposes of Section…

Notice of Delisting or Failure to Satisfy a Continued Listing Rule or Standard; Transfer of Listing. (d) On November 5, 2024, the Board of Directors of Hyliion Holdings Corp. (the “Company”)authorized the Company to voluntarily withdraw the principal listing of the Company’s common stock, par value $0.0001 per share (the “Common Stock”) from the New York Stock Exchange (“NYSE”) and transfer the Company’s common stock listing to the NYSE American stock exchange. The Company expects that listin…

Results of Operations and Financial Condition. On August 6, 2024, Hyliion Holdings Corp. (the “Company”) issued a press release announcing certain financial and other results for the quarter ended June 30, 2024. The full text of the press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated herein by reference. The information furnished in this Current Report on Form 8-K (including Exhibit 99.1) shall not be deemed “filed” for purposes of Section 18 of t…

Results of Operations and Financial Condition. On April 30, 2024, Hyliion Holdings Corp. (the “Company”) issued a press release announcing certain financial and other results for the quarter ended March 31, 2024. The full text of the press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated herein by reference. The information furnished in this Current Report on Form 8-K (including Exhibit 99.1) shall not be deemed “filed” for purposes of Section 18 of…

Notice of Delisting or Failure to Satisfy a Continued Listing Rule or Standard; Transfer of Listing. On March 4, 2024, Hyliion Holdings Corp. announced that it had received notice from the New York Stock Exchange that it was back in compliance with the minimum price listing requirement. A copy of the press release is attached as Exhibit 99.1.

Director and COO — Mr. Andrew Card, Jr., Mr. Stephen Pang, Mr. Dennis Gallagher: Multiple senior executives are departing the company for various reasons.

Results of Operations and Financial Condition. On February 13, 2024, Hyliion Holdings Corp. (the “Company”) issued a press release announcing certain financial and other results for the quarter and year ended December 31, 2023. The full text of the press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated herein by reference. The information furnished in this Current Report on Form 8-K (including Exhibit 99.1) shall not be deemed “filed” for purposes of…

Other Events. On December 20, 2023, Hyliion Holdings Corp. (the “Company”) issued a press release announcing that, on December 18, 2023, its Board of Directors approved a stock repurchase program authorizing the Company to repurchase up to $20 million of its outstanding common shares. The foregoing description of the press release is qualified in its entirety by reference to the complete text of the press release furnished as Exhibit 99.1 hereto, which is hereby incorporated by reference herein.

Results of Operations and Financial Condition. On November 8, 2023, Hyliion Holdings Corp. (the “Company”) issued a press release announcing certain financial and other results for the quarter ended September 30, 2023. The full text of the press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated herein by reference. The information furnished in this Current Report on Form 8-K (including Exhibit 99.1) shall not be deemed “filed” for purposes of Section…

of this Current Report on Form 8-K (including the related Exhibit 99.1) is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, nor shall it be deemed to be incorporated by reference into any registration statement or other document filed by the Company under the Securities Act of 1933, as amended, or the Exchange Act, except as expressly othe…

Results of Operations and Financial Condition. On August 8, 2023, Hyliion Holdings Corp. (the “Company”) issued a press release announcing certain financial and other results for the quarter ended June 30, 2023. The full text of the press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated herein by reference. The information furnished in this Current Report on Form 8-K (including Exhibit 99.1) shall not be deemed “filed” for purposes of Section 18 of t…

Results of Operations and Financial Condition. On May 9, 2023, Hyliion Holdings Corp. (the “Company”) issued a press release announcing certain financial and other results for the quarter ended March 31, 2023. The full text of the press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated herein by reference. The information furnished in this Current Report on Form 8-K (including Exhibit 99.1) shall not be deemed “filed” for purposes of Section 18 of the…

Director — Elaine L. Chao, Howard Jenkins: Two directors resigned and three new directors were appointed.

Other Events. As previously disclosed, on February 13, 2023, Hyliion Holdings Corp. (the “Company” or “Hyliion”) filed a petition (the “Petition”) in the Delaware Court of Chancery (the “Court of Chancery”) pursuant to Section 205 of the Delaware General Corporation Law. The Petition sought to validate an amendment to the Company’s certificate of incorporation increasing the authorized common stock of the Company (“Class A Increase Amendment”) and validate the Company’s restated certificate o…

Results of Operations and Financial Condition. On February 28, 2023, Hyliion Holdings Corp. (the “Company”) issued a press release announcing certain financial and other results for the quarter and year ended December 31, 2022. The full text of the press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated herein by reference. The information furnished in this Current Report on Form 8-K (including Exhibit 99.1) shall not be deemed “filed” for purposes of…

Other Events. As previously disclosed on its Form 8-K filed February 14, 2023, on February 13, 2023, Hyliion Holdings Corp. (the “Company” or “Hyliion”) filed a petition (the “Petition”) in the Delaware Court of Chancery (the “Court of Chancery”) pursuant to Section 205 of the Delaware General Corporation Law (“DGCL”). The Petition seeks validation of an amendment to the Company’s certificate of incorporation increasing the authorized common stock of the Company and validation of the Company’…

Other Events. On February 13, 2023, Hyliion Holdings Corp. (the “Company” or “Hyliion”) filed a petition in the Delaware Court of Chancery (the “Court of Chancery”) pursuant to Section 205 of the Delaware General Corporation Law (“DGCL”), seeking validation of an amendment to its certificate of incorporation increasing the authorized common stock of the Company (as further described below) and of the Company’s restated certificate of incorporation (the “New Charter”), which gave effect to tha…

Board Chair and Director — Edward Olkkola: The death of the Board Chair and Director Edward Olkkola is a significant loss for the company.

Results of Operations and Financial Condition. On November 8, 2022, Hyliion Holdings Corp. (the “Company”) issued a press release announcing certain financial and other results for the quarter ended September 30, 2022. The full text of the press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated herein by reference. The information furnished in this Current Report on Form 8-K (including Exhibit 99.1) shall not be deemed “filed” for purposes of Section…