Thomas J. Healy - 25 Aug 2025 Form 4/A - Amendment Insider Report for Hyliion Holdings Corp. (HYLN)

Role: Chief Executive Officer, Director, 10%+ Owner
Signature: /s/ Thomas J. Healy
Issuer symbol: HYLN
Transactions as of: 25 Aug 2025
Net transactions value: $0
Form type: 4/A - Amendment
Filing time: 18 Nov 2025, 17:06:05 UTC
Date Of Original Report: 25 Aug 2025
Previous filing: 14 May 2025
Next filing: 18 Nov 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Healy Thomas J.	Chief Executive Officer, Director, 10%+ Owner	C/O HYLIION HOLDING CORP., 1202 BMC DRIVE, SUITE 100, CEDAR PARK	/s/ Thomas J. Healy	18 Nov 2025	0001825486

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	HYLN	Common Stock	Tax liability	$0	0	0%	$0.000000	35,396,887	25 Aug 2025	Direct	F1

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	This Amended Form 4 has been filed to delete a reference to shares withheld to satisfy taxes on the reporting person's Form 4 filed with the SEC on August 25, 2025. The shares were initially reported as withheld as a result of an administrative error by the issuer's third party service provider. No shares were withheld on August 25, 2025 and Column 5 of Table 1 has been revised accordingly.