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.
Insider stock sale to cover taxes: Jose Miguel Oxholm, Chief Legal & Compliance Officer of Hyliion Holdings Corp. (HYLN), disposed of 3,357 shares of common stock at $1.60 per share as part of tax withholding tied to the vesting and distribution of restricted stock units. After this transaction he beneficially owns 797,582 shares of Hyliion stock. The filing identifies the sale as occurring in connection with satisfying a tax liability from equity vesting rather than an open-market investment decision. No derivative transactions or other securities actions were reported.
Cheri Lantz, Chief Strategy Officer at Hyliion Holdings Corp. (HYLN), reported a sale of 2,529 shares of Hyliion common stock on 09/02/2025 at a price of $1.60 per share. The filing states the shares were sold to satisfy a tax liability arising from the vesting and distribution of restricted stock units. After the transaction, Ms. Lantz beneficially owns 780,273 shares, reported as direct ownership.
The Form 4 shows a routine, non-derivative disposition by an officer that the filer explains as a tax-related sale rather than a directional trade. The sale represented a small fraction of the reported post-transaction holdings, and the filing is signed and dated 09/02/2025.
Jon Panzer, Chief Financial Officer of Hyliion Holdings Corp. (HYLN), reported a transaction on 08/28/2025 that reflects withholding of shares to cover taxes from restricted stock unit vesting. The Form 4 shows 2,435 shares of Hyliion common stock were disposed of at a price of $1.72 per share under code F(1), and the filing explains these shares were withheld to pay a tax liability related to the vesting and distribution of restricted stock units. After the withholding, Mr. Panzer beneficially owns 908,561 shares directly. The form is signed by the reporting person on 08/29/2025.
Greg Standley, Chief Accounting Officer of Hyliion Holdings Corp. (HYLN), reported a Form 4 disclosing a small disposition related to restricted stock unit tax withholding. On 08/27/2025 he disposed of 519 shares of Hyliion common stock at $1.69 per share. The filing states the shares were withheld to satisfy a tax liability arising from the vesting and distribution of restricted stock units. After the transaction, Mr. Standley beneficially owned 231,533 shares, held directly. The Form 4 is a routine insider reporting of a tax-withholding disposition rather than a voluntary sale for cash.
Joshua T. Mook, Chief Technology Officer of Hyliion Holdings Corp. (HYLN), reported a non-derivative disposition of common stock on 08/27/2025. The filing shows 1,361 shares were disposed of at $1.69 per share, leaving the reporting person with 519,688 shares beneficially owned after the transaction. The explanatory note states the shares were withheld to satisfy a tax liability related to the vesting and distribution of restricted stock units. The Form 4 is signed by Joshua T. Mook on 08/29/2025 and identifies the transaction as routine withholding for taxes rather than an open-market sale.
Insider sale by Hyliion Holdings Corp. officer Jose Miguel Oxholm, listed as Chief Legal & Compliance Officer, reported a sale of 12,573 shares of Hyliion common stock on 08/25/2025 at a reported price of $1.77 per share. After the transaction, Oxholm beneficially owned 800,939 shares, reported as direct ownership.
The filing explains the shares were sold to pay a tax liability arising from the vesting and distribution of restricted stock units. The Form 4 is signed by Oxholm and filed as an individual report by one reporting person.
Joshua T. Mook, Chief Technology Officer of Hyliion Holdings Corp. (HYLN), reported a sale of company common stock on 08/25/2025. The filing discloses disposition of 8,430 shares at a reported price of $1.77 per share to satisfy a tax liability arising from the vesting and distribution of restricted stock units. After the sale, Mr. Mook beneficially owns 521,049 shares, held directly. The Form 4 is filed by one reporting person and is signed by Mr. Mook.
Insider sale to cover taxes: Hyliion Holdings Corp. (HYLN) reported that Cheri Lantz, Chief Strategy Officer, disposed of 10,195 shares of common stock on 08/25/2025 at $1.77 per share. The filing states the sale was made to pay a tax liability arising from the vesting and distribution of restricted stock units. After the transaction, Lantz beneficially owned 782,802 shares, reported as direct ownership. The Form 4 is a routine disclosure showing share reduction tied to employee compensation tax withholding rather than an open-market investment decision.
Thomas J. Healy, CEO and director of Hyliion Holdings Corp. (HYLN), reported a sale of common stock on 08/25/2025. The Form 4 shows he disposed of 61,603 shares at $1.77 per share to pay a tax liability tied to the vesting and distribution of restricted stock units. After the transaction, Healy beneficially owned 35,335,284 shares. The filing is a routine section 16 disclosure recording an insider sale to satisfy tax obligations from equity compensation.
Richard J. Freeland, a director of Hyliion Holdings Corp. (HYLN), purchased 65,000 shares of the issuer's common stock on 08/21/2025 at a price of $1.57 per share. Following this reported purchase, Mr. Freeland beneficially owns 222,798 shares. The Form 4 indicates the filing was made by a single reporting person and is signed by Mr. Freeland on 08/21/2025. No derivative transactions or other securities classes are reported on this form.