Welcome to our dedicated page for Hyliion Holdings 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 Corp. (HYLN) director Vincent T. Cubbage reported an open-market purchase of 50,000 shares of common stock on 2026-08-27 at $3.40 per share. Following this transaction, he directly holds 1,131,363 shares of Hyliion common stock.
Hyliion Holdings Corp. (HYLN) reported that Chief Executive Officer and 10% owner Thomas J. Healy had 29,840 shares of common stock treated as a disposition on 2026-08-21 at $3.33 per share under transaction code J. According to the award agreement, these shares were sold at the direction of the issuer solely to cover Healy’s tax withholding obligations, and his directly held stake after the transaction was 32,782,422 shares.
Hyliion Holdings Corp. (HYLN) reported an insider transaction by Chief Commercial Officer Ramasamy Govindaraj. On 2026-08-21, he disposed of 6,670 shares of common stock at $3.37 per share. According to the award agreement, these shares were sold at the issuer’s direction to cover his tax withholding obligations. Following this transaction, he directly holds 593,920 shares of Hyliion common stock.
Hyliion Holdings Corp. (HYLN) reported an insider equity-related transaction by Chief Legal & Compliance Officer Jose Miguel Oxholm. On 2026-08-21, 11,980 shares of common stock were disposed of at $3.33 per share in a transaction coded "J". According to the award agreement, these shares were sold at the issuer's direction to cover the reporting person's tax withholding obligations, with the decision to sell at the sole discretion of Hyliion. Following this transaction, Oxholm directly holds 799,814 shares of Hyliion common stock.
Hyliion Holdings Corp. (HYLN) reported that Chief Technology Officer Joshua T. Mook disposed of 10,700 shares of common stock on 2026-08-21 at $3.33 per share. According to the award agreement, these shares were sold at the issuer’s direction to cover Mr. Mook’s tax withholding obligations, leaving him with 1,096,606 shares of common stock held directly.
Hyliion Holdings Corp. (HYLN) reported an insider equity transaction by its Chief Financial Officer, Panzer Jon. On 2026-08-21, 13,595 shares of common stock were disposed of at a price of $3.32 per share in a transaction coded as an "other" disposition. According to the applicable award agreement, these shares were sold at the direction of Hyliion to cover the reporting person’s tax withholding obligations, with the decision to sell at the issuer’s sole discretion. Following this transaction, the CFO directly held 935,480 shares of Hyliion common stock.
Hyliion Holdings Corp. (HYLN) reported that officer Greg Standley, Chief Accounting Officer, had an "other" disposition of 3,731 shares of common stock on 2026-08-19 at $3.73 per share. According to the award agreement, these shares were sold at the issuer’s direction solely to cover Standley’s tax withholding obligations, and his directly held stake after the transaction is 253,568 shares. The Rule 10b5-1 checkbox was not marked.
Hyliion Holdings Corp. (HYLN) reported a planned sale of its common stock under Rule 144 for the account of Jon Panzer. A brokerage firm, UBS Financial Services Inc., listed 30,000 shares of Hyliion common stock to be sold, with the securities identified as being held for employee benefit purposes.
The notice shows Hyliion common stock listed on the NYSE, and references an outstanding share figure of 178,600,000 shares, which serves as a baseline for the company’s equity as of the filing context.
Hyliion Holdings Corp. (HYLN) reported that officer Govindaraj Ramasamy has filed a notice under Rule 144 for a proposed sale of company common stock. The filing covers 7,000 shares of common stock, with an indicated aggregate market value of $22,500, to be sold through UBS Financial Services Inc. on or about August 21, 2026.
The 7,000 shares relate to an Employee Benefit transaction with Hyliion Holdings Corp. completed on August 20, 2026, acquired for cash. The notice states that there are 178,600,000 shares of Hyliion common stock outstanding, providing context for the relative size of the proposed sale.
Hyliion Holdings Corp. (HYLN) is the issuer for a planned resale of restricted securities under Rule 144. Joshua Mook intends to sell 15,000 shares of Hyliion common stock through UBS Financial Services Inc., with an approximate aggregate market value of $50,000 and total shares outstanding of 178,600,000 noted for context.