Welcome to our dedicated page for Hyliion Holdings Corporation SEC filings (Ticker: HYLN), a comprehensive resource for investors and traders seeking official regulatory documents including 10-K annual reports, 10-Q quarterly earnings, 8-K material events, and insider trading forms.
Hyliion Holdings Corp. filings document formal disclosures for a developer of modular power plant technology centered on the KARNO™ generator platform. Recent Form 8-K reports furnish quarterly and annual results announcements, including management updates on KARNO development, testing, customer applications, military programs, and related business milestones.
The company’s proxy materials cover board matters, shareholder voting items, executive compensation, equity awards, pay-versus-performance tables, and governance disclosures. Together, these filings provide the regulatory record for Hyliion’s operating results, public-company governance, compensation structure, and capital-market communications as it develops distributed power-generation technology.
Hyliion Holdings (HYLN) insider activity is disclosed in a Form 144 notice covering a planned sale of restricted stock. The notice reports an intention to sell 31,105 shares of common stock through UBS Financial Services Inc. on the NYSE, with an aggregate market value of 51,600 and total shares outstanding of 175,974,228. The securities were acquired on 09/15/2025 in an employee benefit transaction from Hyliion Holdings, with the purchase price paid in cash. The seller also previously sold 3,357 common shares on 09/02/2025 for gross proceeds of 5,362. The signer represents that they are not aware of any undisclosed material adverse information about Hyliion’s current or prospective operations.
Hyliion Holdings (HYLN) has a holder planning to sell restricted or control common shares under Rule 144. The notice covers the proposed sale of 9,039 common shares through UBS Financial Services Inc., with an aggregate market value of $15,000, to be sold on or about 11/17/2025 on the NYSE. The securities were acquired on 11/17/2025 as an employee benefit, with the purchase price paid in cash. The filing also notes that 175,974,228 common shares were outstanding, providing context for the size of the planned sale.
Hyliion Holdings (HYLN) has a Form 144 notice indicating a planned sale of 159,776 shares of common stock through UBS Financial Services Inc. on the NYSE. The shares have an aggregate market value of 265,000, versus 175,974,228 common shares outstanding. The securities are reported as acquired on 11/17/2025 via an employee benefit transaction from Hyliion Holdings, with payment described as cash. The person signing the notice represents that they are not aware of undisclosed material adverse information about Hyliion’s current or prospective operations.
Hyliion Holdings insider Cheri Lantz has filed a Form 144 indicating an intention to sell 25,218 common shares through UBS Financial Services on the NYSE. The shares have an indicated aggregate market value of $41,861.88, compared with 175,974,228 common shares outstanding. The securities were acquired on 09/15/2025 as an employee benefit from Hyliion Holdings and paid for in cash on the same date. Over the past three months, Lantz previously sold 2,529 common shares for gross proceeds of $4,037. By signing the notice, the seller represents that they are not aware of undisclosed material adverse information about Hyliion’s current or prospective operations.
Hyliion Holdings (HYLN) reported an insider transaction by its Chief Accounting Officer. On 11/12/2025, 1,264 shares of common stock were disposed at $1.9 under code “F,” indicating shares withheld to satisfy taxes from restricted stock unit vesting. After this tax-withholding event, the officer beneficially owned 228,692 shares, held directly.
Hyliion Holdings (HYLN) reported Q3 2025 results. Revenue was $759 thousand from research and development services, reflecting new U.S. government contracts. The company posted a net loss of $13.3 million, or $0.08 per share, as operating expenses reached $15.3 million and interest income was $2.0 million.
Hyliion ended the quarter with cash and cash equivalents of $17.9 million and total investments of $146.9 million, supporting total stockholders’ equity of $203.9 million. Management states these resources are sufficient to execute its strategy over the next twelve months. The company continues winding down its powertrain business, with completion expected in the fourth quarter of fiscal 2025.
Growth is tied to the KARNO Power Module and federal R&D work. The Navy’s Office of Naval Research awarded contracts up to $16.0 million (modified in March 2025) and an additional Phase II up to $1.5 million in July 2025. Remaining amounts that may be recognized under these contracts were up to $14.4 million as of September 30, 2025, expected primarily in 2025 and 2026.
Hyliion Holdings Corp. filed a Form 8-K to report that it issued a press release with certain financial and other results for the quarter ended September 30, 2025. The company furnished the full text of this press release as Exhibit 99.1, allowing readers to see the detailed quarterly figures and commentary there. The Form 8-K also clarifies that this information is being furnished, not filed, which affects how it is treated under securities laws and in other company filings.
Hyliion Holdings Corp. (HYLN) CFO Jon Panzer filed a Form 4 reporting a routine tax-withholding transaction tied to RSU vesting. On 11/08/2025, 1,704 shares of common stock were withheld under code F at a price of $2.12 per share to satisfy tax obligations. After this event, Panzer beneficially owned 906,857 shares, held directly.
Hyliion Holdings Corp. (HYLN) reported an insider administrative transaction. The company’s Chief Accounting Officer filed a Form 4 showing 1,577 shares of common stock were withheld on 11/06/2025 at $2.08 per share to satisfy taxes from vesting and distribution of restricted stock units (transaction code F).
After this withholding, the officer directly beneficially owns 229,956 shares of Hyliion common stock.
Hyliion Holdings Corp. disclosed an amended Schedule 13G/A showing that BlackRock, Inc. beneficially owns 8,362,746 shares of Hyliion common stock, representing 4.8% of the class as of September 30, 2025.
BlackRock reports sole voting power over 8,129,218 shares and sole dispositive power over 8,362,746 shares. The filing states the securities were acquired and are held in the ordinary course of business and not for the purpose of changing or influencing control.