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.
Healy Thomas J. reported acquisition or exercise transactions in a Form 4 filing for HYLN. The filing lists transactions totaling 1,185,366 shares at a weighted average price of $2.05 per share. Following the reported transactions, holdings were 889,024 shares.
Hyliion Holdings Corp. disclosed that its Chief Legal & Compliance Officer reported a small sale of company stock tied to tax withholding. On 12/17/2025, 2,480 shares of Hyliion common stock were sold at $1.78 per share, coded as an "J" transaction. According to the footnote, the shares were sold at the issuer’s direction under an award agreement to cover the officer’s tax withholding obligations, with the issuer retaining sole discretion over whether to sell shares for this purpose. After this transaction, the officer directly beneficially owned 753,148 shares of Hyliion common stock.
Hyliion Holdings Corp. reported an insider share transaction by its chief accounting officer, Greg Standley. On 12/12/2025, he disposed of 4,010 shares of common stock at $1.94 per share.
According to the disclosure, the shares were sold at the direction of the issuer under an award agreement to cover the reporting person’s tax withholding obligations. After this transaction, Standley directly beneficially owned 221,888 shares of Hyliion common stock.
Hyliion Holdings Corp.'s chief commercial officer, Govindaraj Ramasamy, reported selling 12,949 shares of the company’s common stock at $1.94 per share. The sale on December 12, 2025 was carried out at the direction of the issuer under an award agreement to cover his tax withholding obligations. After this transaction, he beneficially owned 539,505 shares of Hyliion common stock in direct ownership.
Hyliion Holdings Corp. officer Jose Miguel Oxholm, the chief legal & compliance officer, reported selling 23,422 shares of common stock on 12/12/2025 at $1.94 per share. The transaction was coded as type J, and the explanation states that the shares were sold at the issuer's direction under an award agreement to cover the reporting person's tax withholding obligations.
After this sale, Oxholm directly beneficially owns 755,628 Hyliion shares, showing he continues to maintain a significant personal stake in the company.
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.
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.