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 has a shareholder filing a Rule 144 notice to sell common stock. The filing covers a proposed sale of 50,000 common shares through UBS Financial Services Inc. on the NYSE, with an indicated aggregate market value of $100,000. The issuer had 175,974,228 common shares outstanding at the time referenced. The shares to be sold were acquired on 12/03/2025 as part of an employee benefit arrangement, with payment on the same date. The form also notes that the same seller disposed of 25,218 common shares on 11/17/2025 for gross proceeds of $41,862, and includes a representation that the seller is not aware of undisclosed material adverse information about Hyliion’s operations.
Hyliion Holdings Corp. reported a routine insider share withholding by its Chief Financial Officer, Jon Panzer. On 11/28/2025, 2,435 shares of common stock were withheld at a price of $1.88 per share to cover tax obligations arising from the vesting and distribution of restricted stock units. After this tax-related transaction, Panzer beneficially owned 889,790 shares of Hyliion common stock in direct ownership. The filing is a standard Form 4 disclosure required for company insiders.
Hyliion Holdings Corp. reported an insider equity transaction by its Chief Accounting Officer. On 11/27/2025, 519 shares of Hyliion common stock were withheld at a price of $1.85 per share to cover tax liabilities arising from the vesting and distribution of restricted stock units. After this tax withholding, the reporting person directly beneficially owned 225,898 shares of Hyliion common stock. The filing indicates this is a Form 4 filed by one reporting person serving as an officer of the company.
Hyliion Holdings Corp. reported an equity transaction involving its Chief Technology Officer, who is an officer of the company and filed individually. On November 26, 2025, the officer acquired 540,541 shares of common stock at $1.85 per share, recorded as an acquisition of securities. Following this transaction, the officer beneficially owned 1,048,113 shares directly.
The filing explains that this reflects a grant of restricted stock units under Hyliion’s 2024 Equity Incentive Plan. One-fifth of the award will vest on November 26, 2026, one-fifth on November 26, 2027, and three-fifths on November 26, 2028. On November 27, 2025, 1,361 shares were disposed of at $1.85 per share, representing shares withheld to cover tax liabilities related to vesting and distribution, leaving 1,046,752 shares beneficially owned directly.
Hyliion Holdings Corp. insider filing reports a routine tax-related share sale. The company’s Chief Legal & Compliance Officer, Jose Miguel Oxholm, sold 31,105 shares of Hyliion common stock on 11/17/2025 at a price of $1.66 per share. These shares were sold at the direction of the issuer under the terms of an award agreement, which allows the issuer to decide whether to sell shares to cover the officer’s tax withholding obligations.
The filing explains that this sale includes shares used to cover tax withholding for equity awards vesting 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 cover the August 25 tax obligation, and the related share sale could not occur until the next open trading window. As a result, the portion of shares tied to the August 25 vesting was sold on November 17, 2025. After this transaction, the officer beneficially owned 779,050 shares, held directly.
Hyliion Holdings Corp. (HYLN) reported a Form 4 transaction for its Chief Strategy Officer, who sold 25,218 shares of common stock on November 17, 2025 at $1.66 per share. After this sale, the officer directly holds 765,250 common shares.
The filing explains that these shares were sold at the issuer’s direction under an award agreement to cover the officer’s tax withholding obligations tied to vesting dates on August 25, November 13, and November 14, 2025. An administrative error by a third-party service provider led to cash being used for August 25 taxes initially, so the related shares were instead sold on November 17, 2025, the first date in an open trading window when a sale could be completed.
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 of Hyliion common stock.
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.