Thomas J. Healy - 30 Sep 2026 Form 4 Insider Report for Hyliion Holdings Corp. (HYLN)

Reporting relationship: Chief Executive Officer, Director, 10%+ Owner
Issuer ticker: HYLN
Reported as of: 30 Sep 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 01 Oct 2026, 17:58:22 UTC
Prior SEC filing: 25 Aug 2026
Source filing: View source filing
Reporting owner signature: /s/ Thomas J. Healy

Key filing fact

Thomas J. Healy filed Form 4 for Hyliion Holdings Corp. (HYLN) on 01 Oct 2026.

Key facts

This page summarizes Thomas J. Healy's Form 4 filing for Hyliion Holdings Corp. (HYLN).
4 reported transactions and 2 derivative rows are listed below.
Accepted by SEC: 01 Oct 2026, 17:58.

Change

Previous filing in this sequence was filed on 25 Aug 2026.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001825486 Primary reporting owner

Healy Thomas J.

Relationship: Chief Executive Officer, Director, 10%+ Owner
Address: C/O HYLIION HOLDING CORP., 1202 BMC DRIVE, SUITE 100, CEDAR PARK
Signature: /s/ Thomas J. Healy
Signature date: 01 Oct 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

HYLN transaction

Common Stock

Conversion of derivative security

Transaction value
Shares: +202,033
Change %: +0.62%
Price: $0.000000^*
Shares after: 32,984,455
Date: 30 Sep 2026
Ownership: Direct
Footnotes: F1

HYLN transaction

Common Stock

Conversion of derivative security

Transaction value
Shares: +222,256
Change %: +0.67%
Price: $0.000000^*
Shares after: 33,206,711
Date: 30 Sep 2026
Ownership: Direct
Footnotes: F2

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

HYLN transaction Derivative

Performance Stock Incentive Units

Conversion of derivative security

Transaction value
Shares: -202,033
Change %: -20%
Price: $0.000000^*
Shares after: 808,135
Date: 30 Sep 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 202,033
Exercise price
Footnotes: F3

HYLN transaction Derivative

Performance Stock Incentive Units

Conversion of derivative security

Transaction value
Shares: -222,256
Change %: -25%
Price: $0.000000^*
Shares after: 666,768
Date: 30 Sep 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 222,256
Exercise price
Footnotes: F4

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 4 footnotes

Footnote F1

The underlying market conditions for vesting of this portion of performance stock incentive units ("PSU Award") were satisfied on September 28, 2026, and subsequently approved by the Compensation Committee on September 30, 2026. Half of the vested PSUs will be issued on September 30, 2027 with the remainder to be issued on December 31, 2027.

Footnote F2

The underlying market conditions for vesting of this portion of performance stock incentive units ("PSU Award") were satisfied on September 28, 2026, and subsequently approved by the Compensation Committee on September 30, 2026. These vested PSUs will be issued on December 31, 2028.

Footnote F3

25% of these PSU Awards vested upon the achievement of the underlying closing stock price threshold of a minimum of $4.00 per share over a 180-calendar-day average.

Footnote F4

20% of these PSU Awards vested upon the achievement of the underlying closing stock price threshold of a minimum of $4.00 per share over a 180-calendar-day average.