HYLN

EX-99.1

2 exhibit991063026.htm

EX-99.1

Document

Exhibit 99.1

HYLIION HOLDINGS REPORTS SECOND-QUARTER 2026 FINANCIAL RESULTS

AUSTIN, Texas, August 11, 2026 – Hyliion Holdings Corp. (NYSE American: HYLN) (“Hyliion”), a developer of modular power plant technology, today reported financial results for the second quarter ended June 30, 2026, and provided key updates on the development of the KARNO™ Power Module platform.

Key Business Highlights

•Awarded a $41.7 million U.S. Navy contract for multi-megawatt KARNO Power Modules for shipboard and military base power, with additional contracts anticipated in 2026

•Announced the U.S. Navy's USX-1 Defiant vessel as the platform for KARNO Core sea trials, supporting both ship propulsion and auxiliary power

•Achieved significant additive manufacturing advancements expected to deliver up to a 3 times improvement in printing speed and throughput depending on the component

•Introducing a capital efficient manufacturing scale up plan, in which each megawatt of annual production capacity requires approximately $1.5 million of one-time capital investment and supports $2.5 million to $3.0 million of annual revenue at current pricing

•Executed a beta machine agreement with Colibrium Additive, a GE Aerospace company, to develop the next generation of additive manufacturing systems

•Demonstrated multi-KARNO Power Module operation, enabling multiple systems to function as a single larger power plant

•On track to complete the approximately 10 early adopter units in 2026

•Increasing full-year 2026 revenue guidance from $10 million to $15 million, following second-quarter revenue of $4.9 million, up more than threefold from Q2 2025

•Finished the quarter with $132.4 million in cash and investments and improved the year-end 2026 outlook to $115 to $120 million from prior guidance of $100 million

Executive Commentary

“This quarter, we signed the largest military contract in our history, increased our revenue outlook by 50%, and achieved additive manufacturing advancements that we believe can improve printer throughput by up to 3x,” said Thomas Healy, Founder and CEO of Hyliion. “At the same time, interest from data center customers continues to accelerate, with demand now being discussed at a scale of tens to hundreds of megawatts. We believe the progress we are making positions our KARNO Power Modules to address these increasingly large opportunities.”

Military and Government Progress

Hyliion was awarded a $41.7 million contract with the U.S. Navy to scale the KARNO Power Module into multi-megawatt systems. Under the contract, Hyliion will deliver two systems, one rated above 2 megawatts and the other rated above 3 megawatts, both based on the same modular 800-kilowatt architecture the Company is developing today. The larger systems are expected to broaden the range of military applications for KARNO to include larger vessels and military bases. The contract also includes funding to advance Hyliion’s additive manufacturing capabilities, with work under the program expected to occur primarily in 2027 and 2028.

The Company anticipates additional military contract awards this year, including a potential award from another branch of the U.S. military. If awarded as expected, these contracts would

Exhibit 99.1

bring total new military funding awarded to Hyliion in 2026 to nearly $50 million, reaching the high end of the Company’s objective of $40 million to $50 million.

Hyliion also announced that the U.S. Navy’s USX-1 Defiant will serve as the platform for KARNO Core sea trials, supporting both ship propulsion and auxiliary power. The 800-kilowatt KARNO Power Module being developed for the vessel under existing Office of Naval Research contracts is currently in assembly, with completion expected in 2026.

KARNO Commercial Updates

Hyliion believes it remains on track to complete the approximately 10 early adopter customer units during 2026 and the Company is accumulating run hours across multiple systems in parallel in preparation for field deployment. The Company expects to begin delivering units to customer sites over the next quarter.

Looking ahead to 2027, Hyliion plans to prioritize deliveries under existing military contracts while deploying additional 200 kW KARNO Power Modules with commercial customers, particularly data center operators, to demonstrate the product’s capabilities. Hyliion believes this strategy will support near-term revenue from military programs while accelerating data center adoption and building a larger long-term customer pipeline. As a result, commercialization of the 200 kW KARNO Power Module is now expected in 2027.

Customer interest continues to strengthen across both military and commercial applications, with data center interest growing at an accelerating pace. Hyliion is currently engaged with multiple hyperscalers and leading independent data center developers regarding potential demand ranging from tens to hundreds of megawatts

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hyln-202602240001759631FALSE00017596312026-02-242026-02-24

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 24, 2026

HYLIION HOLDINGS CORP.

(Exact name of registrant as specified in its charter)

Delaware001-3882383-2538002 (State or Other Jurisdiction of Incorporation)(Commission File Number)(I.R.S. Employer Identification No.)

1202 BMC Drive, Suite 100 Cedar Park,TX 78613 (Address of principal executive offices)(Zip Code)

(833) 495-4466 (Registrant’s telephone number, including area code) N/A (Former name or former address, if changed since last report.) Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligations of the registrant under any of the following provisions: o    Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) o    Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) o    Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) o    Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240-13e-4(c)) Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading symbol(s)Name of each exchange on which registered Common Stock, $0.0001 par value per shareHYLNNYSE American LLC

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b–2 of the Securities Exchange Act of 1934 (§240.12b–2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02    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 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 filing of the Company under the Securities Act of 1933, as amended, or the Exchange Act, except as expressly set forth by specific reference in such filing.

Item 9.01    Financial Statements and Exhibits. (d)Exhibits

Exhibit No.Description

99.1Press Release dated February 24, 2026.

104Cover Page Interactive Data File (embedded within the Inline XBRL document).

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused the report to be signed on its behalf by the undersigned hereunto duly authorized.

HYLIION HOLDINGS CORP.

By:/s/ Thomas Healy Date:February 24, 2026 Thomas Healy Chief Executive Officer

hyln-202511110001759631FALSE00017596312025-11-112025-11-11

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 11, 2025

HYLIION HOLDINGS CORP.

(Exact name of registrant as specified in its charter)

Delaware001-3882383-2538002 (State or Other Jurisdiction of Incorporation)(Commission File Number)(I.R.S. Employer Identification No.)

1202 BMC Drive, Suite 100 Cedar Park,TX 78613 (Address of principal executive offices)(Zip Code)

(833) 495-4466 (Registrant’s telephone number, including area code) N/A (Former name or former address, if changed since last report.) Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligations of the registrant under any of the following provisions: o    Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) o    Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) o    Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) o    Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240-13e-4(c)) Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading symbol(s)Name of each exchange on which registered Common Stock, $0.0001 par value per shareHYLNNYSE American LLC

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b–2 of the Securities Exchange Act of 1934 (§240.12b–2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02    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 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 filing of the Company under the Securities Act of 1933, as amended, or the Exchange Act, except as expressly set forth by specific reference in such filing.

Item 9.01    Financial Statements and Exhibits. (d)Exhibits

Exhibit No.Description

99.1Press Release dated November 11, 2025.

104Cover Page Interactive Data File (embedded within the Inline XBRL document).

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused the report to be signed on its behalf by the undersigned hereunto duly authorized.

HYLIION HOLDINGS CORP.

By:/s/ Thomas Healy Date:November 11, 2025 Thomas Healy Chief Executive Officer

hyln-202508120001759631FALSE00017596312025-08-122025-08-12

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 12, 2025

HYLIION HOLDINGS CORP.

(Exact name of registrant as specified in its charter)

Delaware001-3882383-2538002 (State or Other Jurisdiction of Incorporation)(Commission File Number)(I.R.S. Employer Identification No.)

1202 BMC Drive, Suite 100 Cedar Park,TX 78613 (Address of principal executive offices)(Zip Code)

(833) 495-4466 (Registrant’s telephone number, including area code) N/A (Former name or former address, if changed since last report.) Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligations of the registrant under any of the following provisions: o    Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) o    Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) o    Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) o    Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240-13e-4(c)) Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading symbol(s)Name of each exchange on which registered Common Stock, $0.0001 par value per shareHYLNNYSE American LLC

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b–2 of the Securities Exchange Act of 1934 (§240.12b–2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02    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 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 filing of the Company under the Securities Act of 1933, as amended, or the Exchange Act, except as expressly set forth by specific reference in such filing.

Item 9.01    Financial Statements and Exhibits. (d)Exhibits

Exhibit No.Description

99.1Press Release dated August 12, 2025.

104Cover Page Interactive Data File (embedded within the Inline XBRL document).

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused the report to be signed on its behalf by the undersigned hereunto duly authorized.

HYLIION HOLDINGS CORP.

By:/s/ Thomas Healy Date:August 12, 2025 Thomas Healy Chief Executive Officer

hyln-202505130001759631FALSE00017596312025-05-132025-05-13

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 13, 2025

HYLIION HOLDINGS CORP.

(Exact name of registrant as specified in its charter)

Delaware001-3882383-2538002 (State or Other Jurisdiction of Incorporation)(Commission File Number)(I.R.S. Employer Identification No.)

1202 BMC Drive, Suite 100 Cedar Park,TX 78613 (Address of principal executive offices)(Zip Code)

(833) 495-4466 (Registrant’s telephone number, including area code) N/A (Former name or former address, if changed since last report.) Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligations of the registrant under any of the following provisions: o    Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) o    Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) o    Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) o    Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240-13e-4(c)) Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading symbol(s)Name of each exchange on which registered Common Stock, $0.0001 par value per shareHYLNNYSE American LLC

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b–2 of the Securities Exchange Act of 1934 (§240.12b–2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02    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 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 filing of the Company under the Securities Act of 1933, as amended, or the Exchange Act, except as expressly set forth by specific reference in such filing.

Item 9.01    Financial Statements and Exhibits. (d)Exhibits

Exhibit No.Description

99.1Press Release dated May 13, 2025.

104Cover Page Interactive Data File (embedded within the Inline XBRL document).

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused the report to be signed on its behalf by the undersigned hereunto duly authorized.

HYLIION HOLDINGS CORP.

By:/s/ Thomas Healy Date:May 13, 2025 Thomas Healy Chief Executive Officer

hyln-202502250001759631FALSE00017596312025-02-252025-02-25

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 25, 2025

HYLIION HOLDINGS CORP.

(Exact name of registrant as specified in its charter)

Delaware001-3882383-2538002 (State or Other Jurisdiction of Incorporation)(Commission File Number)(I.R.S. Employer Identification No.)

1202 BMC Drive, Suite 100 Cedar Park,TX 78613 (Address of principal executive offices)(Zip Code)

(833) 495-4466 (Registrant’s telephone number, including area code) N/A (Former name or former address, if changed since last report.) Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligations of the registrant under any of the following provisions: o    Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) o    Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) o    Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) o    Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240-13e-4(c)) Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading symbol(s)Name of each exchange on which registered Common Stock, $0.0001 par value per shareHYLNNYSE American LLC

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b–2 of the Securities Exchange Act of 1934 (§240.12b–2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02    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 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 filing of the Company under the Securities Act of 1933, as amended, or the Exchange Act, except as expressly set forth by specific reference in such filing.

Item 9.01    Financial Statements and Exhibits. (d)Exhibits

Exhibit No.Description

99.1Press Release dated February 25, 2025.

104Cover Page Interactive Data File (embedded within the Inline XBRL document).

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused the report to be signed on its behalf by the undersigned hereunto duly authorized.

HYLIION HOLDINGS CORP.

By:/s/ Thomas Healy Date:February 25, 2025 Thomas Healy Chief Executive Officer

hyln-202411140001759631FALSE00017596312024-11-142024-11-14

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 14, 2024

HYLIION HOLDINGS CORP.

(Exact name of registrant as specified in its charter)

Delaware001-3882383-2538002 (State or Other Jurisdiction of Incorporation)(Commission File Number)(I.R.S. Employer Identification No.)

1202 BMC Drive, Suite 100 Cedar Park,TX 78613 (Address of principal executive offices)(Zip Code)

(833) 495-4466 (Registrant’s telephone number, including area code) N/A (Former name or former address, if changed since last report.) Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligations of the registrant under any of the following provisions: o    Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) o    Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) o    Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) o    Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240-13e-4(c)) Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading symbol(s)Name of each exchange on which registered Common Stock, $0.0001 par value per shareHYLNNYSE American LLC

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b–2 of the Securities Exchange Act of 1934 (§240.12b–2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02    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 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 filing of the Company under the Securities Act of 1933, as amended, or the Exchange Act, except as expressly set forth by specific reference in such filing.

Item 9.01    Financial Statements and Exhibits. (d)Exhibits

Exhibit No.Description

99.1Press Release dated November 14, 2024.

104Cover Page Interactive Data File (embedded within the Inline XBRL document).

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused the report to be signed on its behalf by the undersigned hereunto duly authorized.

HYLIION HOLDINGS CORP.

By:/s/ Thomas Healy Date:November 14, 2024 Thomas Healy Chief Executive Officer

hyln-202408060001759631FALSE00017596312024-08-062024-08-06

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 6, 2024

HYLIION HOLDINGS CORP.

(Exact name of registrant as specified in its charter)

Delaware001-3882383-2538002 (State or Other Jurisdiction of Incorporation)(Commission File Number)(I.R.S. Employer Identification No.)

1202 BMC Drive, Suite 100 Cedar Park,TX 78613 (Address of principal executive offices)(Zip Code)

(833) 495-4466 (Registrant’s telephone number, including area code) N/A (Former name or former address, if changed since last report.) Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligations of the registrant under any of the following provisions: o    Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) o    Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) o    Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) o    Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240-13e-4(c)) Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading symbol(s)Name of each exchange on which registered Common Stock, $0.0001 par value per shareHYLNNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b–2 of the Securities Exchange Act of 1934 (§240.12b–2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02    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 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 filing of the Company under the Securities Act of 1933, as amended, or the Exchange Act, except as expressly set forth by specific reference in such filing.

Item 9.01    Financial Statements and Exhibits. (d)Exhibits

Exhibit No.Description

99.1Press Release dated August 6, 2024.

104Cover Page Interactive Data File (embedded within the Inline XBRL document).

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused the report to be signed on its behalf by the undersigned hereunto duly authorized.

HYLIION HOLDINGS CORP.

By:/s/ Thomas Healy Date:August 6, 2024 Thomas Healy Chief Executive Officer

hyln-202404300001759631FALSE00017596312024-04-302024-04-30

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 30, 2024

HYLIION HOLDINGS CORP.

(Exact name of registrant as specified in its charter)

Delaware001-3882383-2538002 (State or Other Jurisdiction of Incorporation)(Commission File Number)(I.R.S. Employer Identification No.)

1202 BMC Drive, Suite 100 Cedar Park,TX 78613 (Address of principal executive offices)(Zip Code)

(833) 495-4466 (Registrant’s telephone number, including area code) N/A (Former name or former address, if changed since last report.) Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligations of the registrant under any of the following provisions: o    Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) o    Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) o    Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) o    Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240-13e-4(c)) Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading symbol(s)Name of each exchange on which registered Common Stock, $0.0001 par value per shareHYLNNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b–2 of the Securities Exchange Act of 1934 (§240.12b–2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02    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 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 filing of the Company under the Securities Act of 1933, as amended, or the Exchange Act, except as expressly set forth by specific reference in such filing.

Item 9.01    Financial Statements and Exhibits. (d)Exhibits

Exhibit No.Description

99.1Press Release dated April 30, 2024.

104Cover Page Interactive Data File (embedded within the Inline XBRL document).

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused the report to be signed on its behalf by the undersigned hereunto duly authorized.

HYLIION HOLDINGS CORP.

By:/s/ Thomas Healy Date:April 30, 2024 Thomas Healy Chief Executive Officer

hyln-202402130001759631FALSE00017596312024-02-132024-02-13

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 13, 2024

HYLIION HOLDINGS CORP.

(Exact name of registrant as specified in its charter)

Delaware001-3882383-2538002 (State or Other Jurisdiction of Incorporation)(Commission File Number)(I.R.S. Employer Identification No.)

1202 BMC Drive, Suite 100 Cedar Park,TX 78613 (Address of principal executive offices)(Zip Code)

(833) 495-4466 (Registrant’s telephone number, including area code) N/A (Former name or former address, if changed since last report.) Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligations of the registrant under any of the following provisions: o    Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) o    Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) o    Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) o    Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240-13e-4(c)) Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading symbol(s)Name of each exchange on which registered Common Stock, $0.0001 par value per shareHYLNNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b–2 of the Securities Exchange Act of 1934 (§240.12b–2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02    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 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 filing of the Company under the Securities Act of 1933, as amended, or the Exchange Act, except as expressly set forth by specific reference in such filing.

Item 9.01    Financial Statements and Exhibits. (d)Exhibits

Exhibit No.Description

99.1Press Release dated February 13, 2024.

104Cover Page Interactive Data File (embedded within the Inline XBRL document).

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused the report to be signed on its behalf by the undersigned hereunto duly authorized.

HYLIION HOLDINGS CORP.

By:/s/ Thomas Healy Date:February 13, 2024 Thomas Healy Chief Executive Officer

hyln-202311080001759631FALSE00017596312023-11-082023-11-08

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 8, 2023

HYLIION HOLDINGS CORP.

(Exact name of registrant as specified in its charter)

Delaware001-3882383-2538002 (State or Other Jurisdiction of Incorporation)(Commission File Number)(I.R.S. Employer Identification No.)

1202 BMC Drive, Suite 100 Cedar Park,TX 78613 (Address of principal executive offices)(Zip Code)

(833) 495-4466 (Registrant’s telephone number, including area code) N/A (Former name or former address, if changed since last report.) Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligations of the registrant under any of the following provisions: o    Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) o    Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) o    Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) o    Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240-13e-4(c)) Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading symbol(s)Name of each exchange on which registered Common Stock, $0.0001 par value per shareHYLNNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b–2 of the Securities Exchange Act of 1934 (§240.12b–2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02    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 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 filing of the Company under the Securities Act of 1933, as amended, or the Exchange Act, except as expressly set forth by specific reference in such filing.

Item 9.01    Financial Statements and Exhibits. (d)Exhibits

Exhibit No.Description

99.1Press Release dated November 8, 2023.

104Cover Page Interactive Data File (embedded within the Inline XBRL document).

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused the report to be signed on its behalf by the undersigned hereunto duly authorized.

HYLIION HOLDINGS CORP.

By:/s/ Thomas Healy Date:November 8, 2023 Thomas Healy Chief Executive Officer

hyln-202308080001759631FALSE00017596312023-08-082023-08-08

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 8, 2023

HYLIION HOLDINGS CORP.

(Exact name of registrant as specified in its charter)

Delaware001-3882383-2538002 (State or Other Jurisdiction of Incorporation)(Commission File Number)(I.R.S. Employer Identification No.)

1202 BMC Drive, Suite 100 Cedar Park,TX 78613 (Address of principal executive offices)(Zip Code)

(833) 495-4466 (Registrant’s telephone number, including area code) N/A (Former name or former address, if changed since last report.) Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligations of the registrant under any of the following provisions: o    Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) o    Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) o    Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) o    Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240-13e-4(c)) Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading symbol(s)Name of each exchange on which registered Common Stock, $0.0001 par value per shareHYLNNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b–2 of the Securities Exchange Act of 1934 (§240.12b–2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02    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 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 filing of the Company under the Securities Act of 1933, as amended, or the Exchange Act, except as expressly set forth by specific reference in such filing.

Item 9.01    Financial Statements and Exhibits. (d)Exhibits

Exhibit No.Description

99.1Press Release dated August 8, 2023.

104Cover Page Interactive Data File (embedded within the Inline XBRL document).

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused the report to be signed on its behalf by the undersigned hereunto duly authorized.

HYLIION HOLDINGS CORP.

By:/s/ Thomas Healy Date:August 8, 2023 Thomas Healy Chief Executive Officer

hyln-202305090001759631FALSE00017596312023-05-092023-05-09

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 9, 2023

HYLIION HOLDINGS CORP.

(Exact name of registrant as specified in its charter)

Delaware001-3882383-2538002 (State or Other Jurisdiction of Incorporation)(Commission File Number)(I.R.S. Employer Identification No.)

1202 BMC Drive, Suite 100 Cedar Park,TX 78613 (Address of principal executive offices)(Zip Code)

(833) 495-4466 (Registrant’s telephone number, including area code) N/A (Former name or former address, if changed since last report.) Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligations of the registrant under any of the following provisions: o    Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) o    Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) o    Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) o    Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240-13e-4(c)) Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading symbol(s)Name of each exchange on which registered Common Stock, $0.0001 par value per shareHYLNNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b–2 of the Securities Exchange Act of 1934 (§240.12b–2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02    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 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 filing of the Company under the Securities Act of 1933, as amended, or the Exchange Act, except as expressly set forth by specific reference in such filing.

Item 9.01    Financial Statements and Exhibits. (d)Exhibits

Exhibit No.Description

99.1Press Release dated May 9, 2023.

104Cover Page Interactive Data File (embedded within the Inline XBRL document).

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused the report to be signed on its behalf by the undersigned hereunto duly authorized.

HYLIION HOLDINGS CORP.

By:/s/ Thomas Healy Date:May 9, 2023 Thomas Healy Chief Executive Officer

hyln-202302280001759631FALSE00017596312023-02-282023-02-28

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 28, 2023

HYLIION HOLDINGS CORP.

(Exact name of registrant as specified in its charter)

Delaware001-3882383-2538002 (State or Other Jurisdiction of Incorporation)(Commission File Number)(I.R.S. Employer Identification No.)

1202 BMC Drive, Suite 100 Cedar Park,TX 78613 (Address of principal executive offices)(Zip Code)

(833) 495-4466 (Registrant’s telephone number, including area code) N/A (Former name or former address, if changed since last report.) Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligations of the registrant under any of the following provisions: o    Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) o    Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) o    Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) o    Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240-13e-4(c)) Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading symbol(s)Name of each exchange on which registered Common Stock, $0.0001 par value per shareHYLNNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b–2 of the Securities Exchange Act of 1934 (§240.12b–2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02    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 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 filing of the Company under the Securities Act of 1933, as amended, or the Exchange Act, except as expressly set forth by specific reference in such filing.

Item 9.01    Financial Statements and Exhibits. (d)Exhibits

Exhibit No.Description

99.1Press Release dated February 28, 2023.

104Cover Page Interactive Data File (embedded within the Inline XBRL document).

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused the report to be signed on its behalf by the undersigned hereunto duly authorized.

HYLIION HOLDINGS CORP.

By:/s/ Thomas Healy Date:February 28, 2023 Thomas Healy Chief Executive Officer

hyln-202211080001759631FALSE00017596312022-11-082022-11-08

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 8, 2022

HYLIION HOLDINGS CORP.

(Exact name of registrant as specified in its charter)

Delaware001-3882383-2538002 (State or Other Jurisdiction of Incorporation)(Commission File Number)(I.R.S. Employer Identification No.)

1202 BMC Drive, Suite 100 Cedar Park,TX 78613 (Address of principal executive offices)(Zip Code)

(833) 495-4466 (Registrant’s telephone number, including area code) N/A (Former name or former address, if changed since last report.) Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligations of the registrant under any of the following provisions: o    Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) o    Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) o    Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) o    Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240-13e-4(c)) Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading symbol(s)Name of each exchange on which registered Common Stock, $0.0001 par value per shareHYLNNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b–2 of the Securities Exchange Act of 1934 (§240.12b–2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02    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 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 filing of the Company under the Securities Act of 1933, as amended, or the Exchange Act, except as expressly set forth by specific reference in such filing.

Item 9.01    Financial Statements and Exhibits. (d)Exhibits

Exhibit No.Description

99.1Press Release dated November 8, 2022.

104Cover Page Interactive Data File (embedded within the Inline XBRL document).

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused the report to be signed on its behalf by the undersigned hereunto duly authorized.

HYLIION HOLDINGS CORP.

By:/s/ Thomas Healy Date:November 8, 2022 Thomas Healy Chief Executive Officer

hyln-202208090001759631FALSE00017596312022-08-092022-08-09

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 9, 2022

HYLIION HOLDINGS CORP.

(Exact name of registrant as specified in its charter)

Delaware001-3882383-2538002 (State or Other Jurisdiction of Incorporation)(Commission File Number)(I.R.S. Employer Identification No.)

1202 BMC Drive, Suite 100 Cedar Park,TX 78613 (Address of principal executive offices)(Zip Code)

(833) 495-4466 (Registrant’s telephone number, including area code) N/A (Former name or former address, if changed since last report.) Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligations of the registrant under any of the following provisions: o    Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) o    Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) o    Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) o    Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240-13e-4(c)) Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading symbol(s)Name of each exchange on which registered Common Stock, $0.0001 par value per shareHYLNNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b–2 of the Securities Exchange Act of 1934 (§240.12b–2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02    Results of Operations and Financial Condition. On August 9, 2022, Hyliion Holdings Corp. (the “Company”) issued a press release announcing certain financial and other results for the quarter ended June 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 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 filing of the Company under the Securities Act of 1933, as amended, or the Exchange Act, except as expressly set forth by specific reference in such filing.

Item 9.01    Financial Statements and Exhibits. (d)Exhibits

Exhibit No.Description

99.1Press Release dated August 9, 2022.

104Cover Page Interactive Data File (embedded within the Inline XBRL document).

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused the report to be signed on its behalf by the undersigned hereunto duly authorized.

HYLIION HOLDINGS CORP.

By:/s/ Thomas Healy Date:August 9, 2022 Thomas Healy Chief Executive Officer

hyln-202205090001759631FALSE00017596312022-05-092022-05-09

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 9, 2022

HYLIION HOLDINGS CORP.

(Exact name of registrant as specified in its charter)

Delaware001-3882383-2538002 (State or Other Jurisdiction of Incorporation)(Commission File Number)(I.R.S. Employer Identification No.)

1202 BMC Drive, Suite 100 Cedar Park,TX 78613 (Address of principal executive offices)(Zip Code)

(833) 495-4466 (Registrant’s telephone number, including area code) N/A (Former name or former address, if changed since last report.) Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligations of the registrant under any of the following provisions: o    Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) o    Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) o    Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) o    Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240-13e-4(c)) Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading symbol(s)Name of each exchange on which registered Common Stock, $0.0001 par value per shareHYLNNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b–2 of the Securities Exchange Act of 1934 (§240.12b–2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02    Results of Operations and Financial Condition. On May 9, 2022, Hyliion Holdings Corp. (the “Company”) issued a press release announcing certain financial and other results for the quarter ended March 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 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 filing of the Company under the Securities Act of 1933, as amended, or the Exchange Act, except as expressly set forth by specific reference in such filing.

Item 9.01    Financial Statements and Exhibits. (d)Exhibits

Exhibit No.Description

99.1Press Release dated May 9, 2022.

104Cover Page Interactive Data File (embedded within the Inline XBRL document).

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused the report to be signed on its behalf by the undersigned hereunto duly authorized.

HYLIION HOLDINGS CORP.

By:/s/ Thomas Healy Date:May 9, 2022 Thomas Healy Chief Executive Officer

1

hyln-202202230001759631FALSE00017596312022-02-232022-02-23

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 23, 2022

HYLIION HOLDINGS CORP.

(Exact name of registrant as specified in its charter)

Delaware001-3882383-2538002 (State or Other Jurisdiction of Incorporation)(Commission File Number)(I.R.S. Employer Identification No.)

1202 BMC Drive, Suite 100 Cedar Park,TX 78613 (Address of principal executive offices)(Zip Code)

(833) 495-4466 (Registrant’s telephone number, including area code) N/A (Former name or former address, if changed since last report.) Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligations of the registrant under any of the following provisions: o    Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) o    Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) o    Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) o    Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240-13e-4(c)) Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading symbol(s)Name of each exchange on which registered Common Stock, $0.0001 par value per shareHYLNNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b–2 of the Securities Exchange Act of 1934 (§240.12b–2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02    Results of Operations and Financial Condition. On February 23, 2022, Hyliion Holdings Corp. (the “Company”) issued a press release announcing certain financial and other results for the quarter and year ended December 31, 2021. 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 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 filing of the Company under the Securities Act of 1933, as amended, or the Exchange Act, except as expressly set forth by specific reference in such filing.

Item 9.01    Financial Statements and Exhibits. (d)Exhibits

Exhibit No.Description

99.1Press Release dated February 23, 2022.

104Cover Page Interactive Data File (embedded within the Inline XBRL document).

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused the report to be signed on its behalf by the undersigned hereunto duly authorized.

HYLIION HOLDINGS CORP.

By:/s/ Thomas Healy Date:February 23, 2022 Thomas Healy Chief Executive Officer

1

hyln-202111090001759631FALSE00017596312021-11-092021-11-09

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 9, 2021

HYLIION HOLDINGS CORP.

(Exact name of registrant as specified in its charter)

Delaware001-3882382-2538002 (State or Other Jurisdiction of Incorporation)(Commission File Number)(I.R.S. Employer Identification No.)

1202 BMC Drive, Suite 100 Cedar Park,TX 78613 (Address of principal executive offices)(Zip Code)

(833) 495-4466 (Registrant’s telephone number, including area code) N/A (Former name or former address, if changed since last report.) Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligations of the registrant under any of the following provisions: o    Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) o    Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) o    Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) o    Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240-13e-4(c)) Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading symbol(s)Name of each exchange on which registered Common Stock, $0.0001 par value per shareHYLNNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b–2 of the Securities Exchange Act of 1934 (§240.12b–2 of this chapter). Emerging growth company x If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02    Results of Operations and Financial Condition. On November 9, 2021, Hyliion Holdings Corp. (the “Company”) issued a press release announcing certain financial and other results for the quarter ended September 30, 2021. 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 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 filing of the Company under the Securities Act of 1933, as amended, or the Exchange Act, except as expressly set forth by specific reference in such filing.

Item 9.01    Financial Statements and Exhibits. (d)Exhibits

Exhibit No.Description

99.1Press Release dated November 9, 2021

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused the report to be signed on its behalf by the undersigned hereunto duly authorized.

HYLIION HOLDINGS CORP.

By:/s/ Thomas Healy Date:November 9, 2021 Thomas Healy Chief Executive Officer

1