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) reported that Chief Accounting Officer Greg Standley had two portions of Performance Stock Incentive Units vest on September 30, 2026: 16,633 units and 17,550 units. Half of the 16,633-unit portion is scheduled for issuance on September 30, 2027, with the remainder on December 31, 2027; the 17,550-unit portion is scheduled for issuance on December 31, 2028.
The vesting followed achievement of closing stock price thresholds of a minimum $4.00 per share over a 180-calendar-day average: 25% of the first PSU Award and 20% of the second vested under those thresholds.
Hyliion Holdings Corp. (HYLN) Chief Legal & Compliance Officer Jose Miguel Oxholm reported conversion of 52,392 and 71,341 performance stock incentive units on September 30, 2026, with corresponding common-stock acquisitions recorded. The vesting conditions were met September 28 and approved September 30. The 52,392-unit portion is scheduled for issuance half on September 30, 2027, and the remainder on December 31, 2027; the 71,341-unit portion is scheduled for issuance on December 31, 2028. Footnotes state that 25% and 20% of the respective PSU awards vested after meeting a minimum $4.00-per-share closing-price threshold over a 180-calendar-day average.
Hyliion Holdings Corp. Chief Technology Officer Joshua T. Mook reported conversion-related transactions involving 55,981 and 71,341 performance stock incentive units on September 30, 2026. The respective award footnotes state that 25% and 20% vested upon meeting a minimum $4.00-per-share closing-price threshold over a 180-calendar-day average; the underlying conditions were satisfied September 28 and approved September 30. Half of the vested 55,981-unit award is scheduled for issuance September 30, 2027, with the remainder December 31, 2027; the 71,341-unit award is scheduled for issuance December 31, 2028.
Hyliion Holdings Corp. Chief Financial Officer Jon Panzer reported dispositions of 59,210 and 75,457 performance stock incentive units and acquisitions of corresponding common shares dated September 30, 2026. The underlying market conditions were satisfied on September 28, 2026, and approved by the Compensation Committee on September 30. Half of the 59,210-share award is scheduled for issuance on September 30, 2027, with the remainder on December 31, 2027; the 75,457-share award is scheduled for issuance on December 31, 2028. The respective vesting thresholds covered 25% and 20% of the awards at a minimum of $4.00 per share over a 180-calendar-day average.
Hyliion Holdings Corp. reported PSU award activity for CEO and director Thomas J. Healy, a ten-percent owner: two portions were tied to 202,033 and 222,256 underlying common shares. The award conditions were satisfied September 28, 2026, and approved September 30, 2026. Half of the 202,033-share portion is scheduled for issuance September 30, 2027, with the remainder December 31, 2027; the 222,256-share portion is scheduled for issuance December 31, 2028. Vesting thresholds applied to 25% and 20% of the respective awards and required a minimum $4.00 per share over a 180-calendar-day average.
Hyliion Holdings Corp. (HYLN) director Vincent T. Cubbage transferred 5,750 shares of Common Stock as a bona fide gift to family members on September 30, 2026. No funds were exchanged, and no sale occurred. He reported direct holdings of 1,125,613 shares after the transfer.
Hyliion Holdings Corp. approved and adopted an unfunded, nonqualified deferred compensation plan effective September 28, 2026, intended to comply with Section 409A. It covers a select group of management or highly compensated employees and non-employee directors; initial enrollment is expected in December 2026. Employees may defer settlement of 100% of restricted stock unit and/or performance share awards under the 2024 Equity Incentive Plan, while non-employee directors may defer 100% of their restricted stock unit awards. Deferred awards are credited as notional shares and settled in Hyliion common stock. The plan provides no company contributions.
Participants may choose in-service distributions as a lump sum or up to five annual installments, and retirement distributions as a lump sum or up to ten annual installments. Retirement requires separation from service after attaining age 60 with at least five years of service. A change-in-control lump sum applies if separation occurs within 12 months after a change in control; separation before retirement eligibility and death before payments begin also trigger lump-sum distributions.
Hyliion Holdings Corp. (HYLN) reported that its Chief Legal & Compliance Officer, Jose Miguel Oxholm, made a charitable transfer of company stock. On September 21, 2026, he made a bona fide, irrevocable gift of 50,000 shares of Hyliion common stock, receiving no consideration and retaining no pecuniary interest in the donated shares.
After this gift, he continues to hold 749,814 shares of Hyliion common stock directly.
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.