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. Chief Technology Officer Joshua T. Mook reported an insider transaction involving the company’s common stock. On 12/12/2025, 12,949 shares were disposed of at $1.94 per share, leaving 1,033,803 shares beneficially owned afterward in direct form.
The filing explains that these shares were sold at the direction of the issuer under the terms of an award agreement to cover Mook’s tax withholding obligations, with the issuer holding sole discretion over whether to sell shares for this purpose.
Hyliion Holdings Corp. disclosed that its chief strategy officer, Cheri Lantz, reported a company-directed sale of common stock tied to equity compensation. On 12/12/2025, she disposed of 15,646 shares of common stock at $1.94 per share, and now beneficially owns 746,904 shares directly. The shares were sold at the direction of the issuer under an award agreement, which gives the company sole discretion to sell shares to cover her tax withholding obligations. The report was filed by a single reporting person and reflects a routine, compensation-related transaction rather than an open-market discretionary sale.
Hyliion Holdings Corp. chief financial officer Jon Panzer reported selling 16,440 shares of common stock on 12/12/2025 at a price of $1.94 per share. Under the issuer's award agreement with Panzer, these shares were sold at the direction of the issuer to cover his tax withholding obligations.
Following this transaction, Panzer beneficially owns 873,350 shares of Hyliion common stock directly.
Hyliion Holdings Corp. disclosed that Chief Executive Officer, director and 10% owner Thomas J. Healy reported a sale of 134,963 shares of common stock on 12/12/2025. The transaction price was $1.94 per share, and his directly held beneficial ownership after the sale was 35,102,148 shares.
According to the disclosure, these shares were sold at the direction of the issuer under the terms of an award agreement with the reporting person. Under that agreement, the issuer may decide to sell shares to cover the reporting person’s tax withholding obligations.
A shareholder of Hyliion Holdings Corp has filed a notice of proposed sale under Rule 144 covering 30,000 shares of common stock. The shares are to be sold through UBS Financial Services Inc. on the NYSE, with an indicated aggregate market value of $58,500. The filing notes that the issuer has 175,400,000 shares of this class outstanding. The seller acquired the 30,000 shares on 12/12/2025 in an employee benefit transaction from Hyliion Holdings Corp and paid for them in cash on the same date.
Hyliion Holdings Corp reported a planned insider sale under Rule 144 for 32,000 common shares. The shares are to be sold through UBS Financial Services Inc. on the NYSE, with an aggregate market value listed at $62,400. The filing notes 175,400,000 shares of the same class outstanding, providing context for the size of the transaction.
The seller acquired the 32,000 common shares from Hyliion Holdings Corp on 12/12/2025 as an employee benefit and paid the purchase price in cash on the same date. The approximate sale date indicated is also 12/12/2025. Over the prior three months, the same person, identified as Joshua Mook, sold 9,039 common shares on 11/17/2025 for gross proceeds of $15,000. The signer represents that they are not aware of undisclosed material adverse information about Hyliion’s operations.
Hyliion Holdings Corp stockholder Jose Oxholm has filed a Form 144 notice to sell 60,000 shares of common stock. The planned sale is to be executed through UBS Financial Services Inc., with an aggregate market value of $117,000, and is targeted for around 12/12/2025 on the NYSE. The shares were acquired on 12/12/2025 through an employee benefit transaction, with 60,000 shares paid for in cash. Over the prior three months, Jose Oxholm sold an additional 31,105 common shares on 11/17/2025 for gross proceeds of $51,600.
Hyliion Holdings Corp has a planned sale of restricted securities under Rule 144. A holder intends to sell 40,000 shares of common stock through UBS Financial Services Inc. The planned sale has an indicated aggregate market value of $78,000 and is expected to occur on or about 12/12/2025 on the NYSE. The issuer has 175,400,000 shares of common stock outstanding, providing context for the size of the transaction.
The shares to be sold were acquired on 12/12/2025 in an employee benefit transaction from Hyliion Holdings Corp, with payment described as cash. The seller represents that they do not know of any undisclosed material adverse information about the company’s current or prospective operations when submitting this notice.
Hyliion Holdings Corp. reported that an affiliated holder plans to sell 220,000 shares of its common stock through UBS Financial Services Inc., with an aggregate market value of $432,000, on or about 12/12/2025 on the NYSE. The filing notes that Hyliion common stock outstanding was 175,400,000 shares.
The shares to be sold were acquired on 12/12/2025 in an employee benefit transaction from Hyliion Holdings Corp., with cash listed as the form of payment. The disclosure also records that Thomas Healy sold 159,776 common shares on 11/17/2025 for gross proceeds of $265,300 during the prior three months.
Hyliion Holdings Corp. reported a small insider stock sale by its Chief Strategy Officer. On 12/03/2025, the officer disposed of 2,700 shares of common stock at $1.86 per share. The filing explains these shares were sold at the issuer’s direction under an award agreement to cover the officer’s tax withholding obligations, meaning the sale was tied to equity compensation rather than an open-market portfolio decision. After this transaction, the officer beneficially owned 762,550 shares of Hyliion common stock.