Hyliion Holdings (HYLN) Form 4 Filings

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. (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.

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. Chief Executive Officer Thomas J. Healy transferred 2,500,000 shares of Common Stock as a bona fide gift to the TH 2026 Irrevocable Trust dated June 26, 2026. The filing states this was for estate planning purposes and that no payment or other consideration was received.

The trust’s beneficiaries are members of Healy’s family and future descendants. Healy is neither a trustee nor a beneficiary and does not have or share voting or investment power over the trust’s shares. Following the gift, he directly holds 32,812,262 shares of Common Stock.

Hyliion Holdings Corp. director Cubbage Vincent T. transferred 11,500 shares of Common Stock as a bona fide gift to family members. No funds were exchanged and no sale occurred in this transfer. After the gift, he directly holds 1,081,363 shares of Hyliion Common Stock.

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. reported an insider transaction involving Chief Commercial Officer Ramasamy Govindaraj, where 130 shares of common stock were sold at $2.02 per share. According to the award agreement, the issuer directed this sale to cover the reporting person’s tax withholding obligations, meaning it was a mechanistic, issuer-controlled transaction rather than a discretionary market trade. Following this small adjustment, Govindaraj directly holds 607,105 shares of Hyliion common stock.

Hyliion Holdings Corp. Chief Accounting Officer Greg Standley reported an administrative share transaction involving company common stock. On this event, 7,411 shares of common stock were sold at $2.04 per share to cover his tax withholding obligations under the company’s award agreement. According to the terms described, the decision to sell shares for this purpose was made at the sole discretion of the issuer, not the executive. Following this transaction, Standley directly holds 261,280 shares of Hyliion common stock.

Hyliion Holdings Corp. Chief Commercial Officer Ramasamy Govindaraj reported an issuer-directed sale of 12,758 shares of common stock at $2.04 per share. The shares were sold by the issuer to cover his tax withholding obligations under an award agreement. Following this transaction, he directly holds 607,235 common shares.

Hyliion Holdings Corp. insider Jose Miguel Oxholm, the Chief Legal & Compliance Officer, reported an award-related share transaction. On March 3, 2026, 24,900 shares of common stock were sold at $2.04 per share to cover his tax withholding obligations under an award agreement, at the issuer’s sole discretion. After this transaction, he held 823,370 common shares directly.

Hyliion Holdings Corp. reported an insider transaction involving Chief Technology Officer Joshua T. Mook. On this Form 4, 14,816 shares of common stock were sold at $2.04 per share to cover his tax withholding obligations under an equity award. According to the award agreement, the decision to sell these shares was made at the sole discretion of the issuer. After this transaction, Mook directly owned 1,114,109 shares of Hyliion common stock.

Hyliion Holdings Corp.’s Chief Strategy Officer, Cheri Lantz, reported an issuer-directed tax-related share transaction. On this Form 4, 16,700 shares of common stock were sold at $2.04 per share under the issuer’s award agreement to cover her tax withholding obligations, with the sale decision made solely by the company. After this transaction, she holds 730,204 shares of Hyliion common stock directly.

Hyliion Holdings Corp. reported an insider transaction involving Chief Financial Officer Jon Panzer. On this Form 4, 16,820 shares of common stock were sold at a price of $2.04 per share at the direction of the company to cover his tax withholding obligations under an award agreement. After this transaction, Panzer directly holds 957,140 shares of Hyliion common stock.

Hyliion Holdings Corp. reported a tax-related share transaction involving Chief Executive Officer Thomas J. Healy. A total of 58,202 shares of common stock were sold at $2.05 per share at the direction of the company to cover his tax withholding obligations under an award agreement. Following this transaction, Healy directly owned 35,340,288 shares of Hyliion common stock.

Hyliion Holdings Corp. director Melanie Trent reported an equity award. On February 11, 2026, she acquired 60,976 shares of common stock as a restricted stock unit (RSU) grant under the company’s 2024 Equity Incentive Plan at a reference price of $2.05 per share.

The RSU award will vest on February 11, 2027, meaning the shares become fully earned on that date if vesting conditions are met. After this grant, Trent beneficially owns 218,774 shares of Hyliion common stock in direct ownership.

Hyliion Holdings Corp. director Robert M. Knight Jr. reported acquiring 60,976 shares of common stock on February 11, 2026 through a restricted stock unit award valued at $2.05 per share. Following this equity grant, he directly holds 375,345 common shares. The RSU award will fully vest on February 11, 2027.

Hyliion Holdings Corp. director Mary Gustanski reported an equity award of 60,976 shares of common stock on February 11, 2026. The shares were acquired as a grant of restricted stock units under Hyliion’s 2024 Equity Incentive Plan at a reference price of $2.05 per share.

Following this award, Gustanski’s directly held beneficial ownership increased to 256,379 shares of Hyliion common stock. The restricted stock unit award is scheduled to fully vest on February 11, 2027, meaning the shares become earned and unrestricted on that future date if vesting conditions are met.

Hyliion Holdings Corp. director Richard Joseph Freeland reported an equity award of common stock on Form 4. On February 11, 2026 he acquired 60,976 shares at $2.05 per share as a grant under Hyliion’s 2024 Equity Incentive Plan. These restricted stock units will vest on February 11, 2027, bringing his directly held beneficial ownership to 283,774 shares after the award.

Hyliion Holdings Corp. director Vincent T. Cubbage received an equity grant tied to common stock. On February 11, 2026, he was awarded 60,976 shares of common stock at a grant price of $2.05 per share, reported as an acquisition.

This award represents restricted stock units granted under Hyliion’s 2024 Equity Incentive Plan and will vest on February 11, 2027. Following this grant, Cubbage directly beneficially owns 1,092,863 shares of Hyliion common stock.

Craig Jeffrey A reported acquisition or exercise transactions in this Form 4 filing.

Hyliion Holdings Corp. director Jeffrey A. Craig received an equity grant tied to the company’s common stock. On February 11, 2026, he was awarded 60,976 shares at $2.05 per share through a restricted stock unit grant under Hyliion’s 2024 Equity Incentive Plan. These restricted stock units will vest on February 11, 2027, meaning the shares become fully his on that date if conditions are met. Following this grant, Craig directly beneficially owns 402,845 Hyliion shares.

Hyliion Holdings Corp. director Rodger L. Boehm acquired 60,676 shares of common stock through an equity award. The award was granted on February 11, 2026 at a reference price of $2.05 per share under the company’s 2024 Equity Incentive Plan.

The grant consists of restricted stock units that are scheduled to vest on February 11, 2027. Following this grant, Boehm directly beneficially owns 218,474 shares of Hyliion common stock, reflecting his updated equity position as a company director.

Standley Greg reported acquisition or exercise transactions in this Form 4 filing.

Hyliion Holdings Corp. granted new equity awards to its Chief Accounting Officer, Greg Standley. On February 11, 2026, he received 46,803 shares of common stock as a restricted stock unit award at a reference price of $2.05 per share, bringing his directly held common stock to 268,691 shares after the grant.

One-third of this RSU award will vest on February 11, 2027, with the remaining two-thirds vesting quarterly in equal amounts over the following two years under Hyliion’s 2024 Equity Incentive Plan. He was also granted 70,203 performance stock incentive units, each tied to an equivalent number of common shares, which will vest only if Hyliion’s closing stock price meets thresholds between $4.00 and $7.00 per share over a 90- to 180-day average by December 31, 2028.

Hyliion Holdings Corp. granted equity awards to its Chief Commercial Officer, Govindaraj Ramasamy. On February 11, 2026, he acquired 80,488 shares of common stock at $2.05 per share as a restricted stock unit award, bringing his directly owned common shares to 619,993.

He also received 241,464 performance stock incentive units under the 2024 Equity Incentive Plan. These units relate to an equal number of common shares and have an exercise price of $0. The RSU award vests one-third on February 11, 2027, with the remaining two-thirds vesting quarterly over the following two years.

The performance stock units vest only if Hyliion’s closing stock price meets thresholds ranging from $4.00 to $7.00 per share, measured over a 90 to 180-calendar-day average by December 31, 2028.

Hyliion Holdings Corp. granted equity awards to its Chief Legal & Compliance Officer, Jose Miguel Oxholm. He received 95,122 shares of common stock as a restricted stock unit award valued at $2.05 per share, bringing his directly held common stock to 848,270 shares after the grant.

The RSU award was issued under Hyliion’s 2024 Equity Incentive Plan, with one-third vesting on February 11, 2027 and the remaining two-thirds vesting quarterly in equal amounts over the following two years. He also received 285,366 performance stock incentive units, which can convert into an equal number of common shares if the stock meets closing price targets between $4.00 and $7.00 per share over a 90–180 day average by December 31, 2028.

MOOK JOSHUA T. reported acquisition or exercise transactions in this Form 4 filing.

Hyliion Holdings Corp.'s Chief Technology Officer, Joshua T. Mook, received new equity awards that increase his direct stake in the company. On February 11, 2026, he was granted 95,122 shares of common stock as a restricted stock unit award at a reference price of $2.05 per share, bringing his directly held common shares to 1,128,925.

He also received 285,366 performance stock incentive units, each tied to common stock. These performance units vest by December 31, 2028 only if Hyliion’s closing stock price meets thresholds ranging from $4.00 to $7.00 per share over a 90–180 calendar-day average. One-third of the restricted stock units vests on February 11, 2027, with the remaining two-thirds vesting quarterly in equal amounts over the following two years.

Hyliion Holdings Corp.’s Chief Financial Officer, Jon Panzer, reported equity awards granted on February 11, 2026. He acquired 100,610 shares of common stock at $2.05 per share, increasing his direct common stock holdings to 973,960 shares.

He also received 301,830 performance stock incentive units under the 2024 Equity Incentive Plan. These units can convert into common stock if the company’s closing share price averages between $4.00 and $7.00 over 90–180 days by December 31, 2028. A separate restricted stock unit award vests one-third on February 11, 2027, with the remaining two-thirds vesting quarterly over the following two years.

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.