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.
Hyliion Holdings Corp. Chief Accounting Officer Greg Standley reported an administrative share transaction. On May 19, 2026, 3,981 shares of common stock were sold at $4.05 per share under the issuer’s award agreement to cover his tax withholding obligations at the issuer’s sole discretion. Following this, he directly holds 257,299 common shares, indicating a routine, tax-related adjustment rather than a discretionary market trade.
Hyliion Holdings Corp.'s Chief Commercial Officer, Ramasamy Govindaraj, had a total of 6,515 shares of common stock sold on his behalf over two days to cover tax withholding obligations tied to equity awards. The shares were sold at the issuer’s direction under an award agreement, not as discretionary market trades. Following these transactions, he directly holds 600,590 shares of Hyliion common stock.
Hyliion Holdings Corp.’s Chief Legal & Compliance Officer Jose Miguel Oxholm reported two issuer-directed transactions in common stock. On May 19, 8,550 shares at $4.06 per share and on May 20, 3,026 shares at $3.92 per share were sold at the issuer’s direction under an award agreement to cover his tax withholding obligations. The footnote explains that the decision to sell shares for taxes is at the sole discretion of the issuer, so these are not discretionary open‑market trades by the insider. After these transactions, Oxholm directly held 811,794 shares of Hyliion common stock.
Hyliion Holdings Corp.’s Chief Technology Officer, Joshua T. Mook, reported two small Form 4 transactions in common stock coded as “other acquisition or disposition.” On May 19 and May 20, a total of 6,803 shares were sold at prices of $4.06 and $3.92 per share. A footnote explains these shares were sold at the direction of the issuer under an award agreement to cover Mr. Mook’s tax withholding obligations, meaning they were mechanistic, compensation-related sales rather than discretionary trading. After these transactions, Mr. Mook directly holds 1,107,306 common shares, so the tax-related sales represent a small portion of his overall stake.
Hyliion Holdings Corp. Chief Financial Officer Jon Panzer reported two non-market transactions in company common stock. On May 19 and May 20, a total of 8,065 shares were sold at prices of $4.06 and $3.92 per share, respectively.
According to the award agreement, these sales were executed at the issuer’s direction solely to cover Panzer’s tax withholding obligations, rather than as discretionary trades. After these transactions, Panzer directly holds 949,075 shares of Hyliion common stock.
Hyliion Holdings Corp. Chief Executive Officer Thomas J. Healy reported two "other" transactions in Hyliion common stock. On May 19 and May 20, a total of 28,026 shares were sold at prices of $4.08 and $3.98 per share.
According to the disclosure, these shares were sold at the direction of Hyliion under the terms of its award agreement with Healy to cover his tax withholding obligations. After these transactions, Healy directly held about 35.3 million shares of Hyliion common stock, indicating the changes were small relative to his overall position.
Hyliion Holdings Corp submitted a Form 144 notice reporting the proposed sale of 30,000 shares of Common Stock on 05/19/2026 under an Employee Benefit arrangement for cash. The filing also lists a prior sale by Thomas Healy of 58,202 shares on 03/03/2026.
Hyliion Holdings Corp. reported the results of its 2026 Annual Meeting of Stockholders held on May 19, 2026. Stockholders elected Class III directors Rodger Boehm, Mary Gustanski, and Robert Knight, Jr., each receiving over 76 million votes in favor with about 4–5 million votes withheld and 48,012,672 broker non-votes.
Stockholders also ratified Grant Thornton LLP as the independent registered public accounting firm for the fiscal year ended December 31, 2026, with 128,399,016 votes for, 794,022 against, and 306,551 abstentions. On an advisory basis, stockholders approved the compensation of named executive officers and approved an amendment to the 2024 Equity Incentive Plan, with more than 72 million votes for each proposal.
Hyliion Holdings Corp filed a Form 144 notice reporting a proposed sale of 15,000 shares of Common Stock. The filing lists the intended sale date as 05/19/2026 and identifies the sale as related to an Employee Benefit transaction for cash. The filing also discloses a prior sale of 14,816 shares on 03/03/2026 by Joshua Mook.
Hyliion Holdings Corp submitted a Form 144 reporting a proposed sale of 15,000 shares of Common Stock on 05/19/2026 under an Employee Benefit designation for cash. The filing also shows a prior reported sale on 03/03/2026 of 16,820 shares by Jon Panzer.