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. (HYLN) files reports and disclosures with the U.S. Securities and Exchange Commission that provide detail on its financial condition, operations, and key developments related to its electricity-producing technologies. These SEC filings complement the company’s public news releases about the KARNO Power Module, distributed power projects, and regulatory milestones.
On this page, you can review Hyliion’s periodic and current reports, including Forms 10‑K and 10‑Q when filed, which describe revenue sources such as research and development services, operating expenses tied to advancing the KARNO platform, and information about cash, investments, and capital deployment. Current reports on Form 8‑K, such as those furnished in connection with quarterly results, outline material events including financial updates and significant operational milestones.
Stock Titan enhances these filings with AI‑powered summaries that highlight important sections, explain technical language, and surface items that may matter to investors, such as progress in product development, changes in research and development spending, or updates related to regulatory determinations affecting the KARNO technology. When insider transaction reports on Form 4 or proxy statements on Schedule 14A are available, they can provide additional insight into executive share activity and governance matters.
Filings are sourced in near real time from the SEC’s EDGAR system, and AI tools help organize them by type and topic so users can quickly locate quarterly and annual reports, 8‑K disclosures, and other relevant documents. This structure allows readers to move from high‑level AI explanations to the underlying Hyliion filings for a more detailed view of how the company reports on its distributed power generation business.
Hyliion Holdings Corp. (HYLN) reported that its Chief Executive Officer, director and 10% owner Thomas J. Healy sold 159,776 shares of common stock on November 17, 2025 at a price of $1.66 per share. After this transaction, he beneficially owned 35,237,111 shares, held directly. According to the disclosure, the sale was made at the direction of the company under an award agreement that allows the issuer to sell shares to cover the reporting person’s tax withholding obligations.
The explanation notes that the sale includes shares sold to cover tax withholding tied to vesting dates on August 25, November 13, and November 14, 2025. Due to an administrative error by a third-party service provider, cash was initially used to satisfy the August 25, 2025 tax obligation, and the related share sale could not occur until the next open trading window, which began on November 17, 2025.
Hyliion Holdings Corp. (HYLN) insider Jose Miguel Oxholm, the company’s Chief Legal & Compliance Officer, filed an amended Form 4 to correct a prior report. The amendment removes an earlier reference to common shares allegedly withheld to cover taxes on a transaction dated 08/25/2025, which the company’s third-party service provider had reported in error.
The filing clarifies that no shares were actually withheld on 08/25/2025, and updates the record to show that Oxholm directly beneficially owns 813,512 shares of common stock following the reported transaction.
Hyliion Holdings Corp. (HYLN) reported an administrative correction to insider ownership reporting rather than a new stock transaction. Chief Strategy Officer Cheri Lantz filed an amended Form 4 to fix an earlier report dated August 25, 2025. The original filing had shown common shares being withheld to cover taxes, using transaction code “F,” but the company now states that no shares were actually withheld on that date due to an administrative error by a third-party service provider. After the correction, Lantz is reported as directly owning 792,997 shares
Hyliion Holdings Corp. insider Thomas J. Healy, the chief executive officer, director and 10% owner of HYLN, filed an amended Form 4 to correct a prior report for August 25, 2025. The earlier filing had shown shares of common stock withheld to cover taxes, but the company states this was due to an administrative error by its third-party service provider and that no shares were actually withheld on that date. Following the correction, Healy is shown as directly owning 35,396,887 shares of Hyliion common stock.
Hyliion Holdings Corp. Chief Accounting Officer Greg Standley reported an automatic share withholding related to equity compensation. On 11/14/2025, 2,275 shares of Hyliion common stock were disposed of at $1.70 per share under transaction code “F,” which indicates shares were withheld to cover tax liabilities from the vesting and distribution of restricted stock units. After this tax withholding event, Standley beneficially owns 226,417 shares of Hyliion common stock directly.
Hyliion Holdings Corp. (HYLN) Chief Commercial Officer Govindaraj Ramasamy reported automatic share withholding transactions related to equity compensation. On 11/13/2025, 4,110 shares of common stock were withheld at $1.68 per share, and on 11/14/2025, 7,397 shares were withheld at $1.70 per share. These are coded as transaction type “F,” meaning shares were withheld to cover tax liabilities arising from the vesting and distribution of restricted stock units. Following these transactions, the reporting person beneficially owned 552,454 shares of Hyliion common stock, held directly.
Hyliion Holdings Corp. officer reports tax-related share transactions. The company’s Chief Technology Officer reported multiple transactions in Hyliion common stock in mid-
Hyliion Holdings Corp. (HYLN) reported an insider equity update for its Chief Financial Officer, Jon Panzer. On 11/13/2025, 5,226 shares of common stock and on 11/14/2025, 9,406 shares were disposed of at prices of $1.68 and $1.70 per share, respectively. These dispositions were not open-market sales but shares withheld to cover a tax liability arising from the vesting and distribution of restricted stock units.
After these transactions, Panzer directly beneficially owned 892,225 shares of Hyliion common stock. The filing indicates this was a routine tax-related adjustment to his equity holdings, with no derivative securities reported in Table II.
Hyliion Holdings Corp. insider Joshua T. Mook, the company’s Chief Technology Officer, filed an amended Form 4 to correct a previously reported tax-withholding transaction. The earlier filing had shown shares of common stock withheld on August 25, 2025 under transaction code "F" due to an administrative error by the issuer’s third party service provider. The amendment clarifies that no shares were actually withheld on that date and updates Column 5 of Table I. Following the corrected entry, Mook is reported as beneficially owning 529,479 shares of common stock, held directly.
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.
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