Cheri Lantz - Nov 17, 2025 Form 4 Insider Report for Hyliion Holdings Corp. (HYLN)

Role: Chief Strategy Officer
Signature: /s/ Cheri Lantz
Stock symbol: HYLN
Transactions as of: Nov 17, 2025
Transactions value $: -$41,862
Form type: 4
Date filed: 11/18/2025, 05:07 PM
Previous filing: Sep 2, 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
LANTZ CHERI	Chief Strategy Officer	C/O HYLIION HOLDING CORP., 1202 BMC DRIVE, SUITE 100, CEDAR PARK	/s/ Cheri Lantz	2025-11-18	0001914910

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	HYLN	Common Stock	Other	-$41.9K	-25.2K	-3.19%	$1.66	765K	Nov 17, 2025	Direct	F1, F2

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

Explanation of Responses:

Id	Content
F1	These shares were sold at the direction of the issuer under the terms of the issuer's award agreement with the reporting person. Under the award agreement, the decision to sell shares to cover the reporting person's tax withholding obligations is at the sole discretion of the issuer.
F2	This transaction includes the sale of issuer common shares to cover the reporting person's tax withholding obligation for vesting dates on August 25, November 13, and November 14, 2025. As a result of an administrative error by the issuer's third-party service provider, cash was paid on behalf of the reporting person for tax withholding obligations on the vesting date, August 25, 2025. A corresponding sale of issuer common shares to cover the reporting person's tax withholding obligation on August 25, 2025 could not be completed until the opening of the issuer's next window period. Accordingly, the portion of the above shares attributed to the vesting on August 25, 2025 were sold November 17, 2025, the first available date during an open window period on which the shares could be sold on behalf of the reporting person.

Content

These shares were sold at the direction of the issuer under the terms of the issuer's award agreement with the reporting person. Under the award agreement, the decision to sell shares to cover the reporting person's tax withholding obligations is at the sole discretion of the issuer.

This transaction includes the sale of issuer common shares to cover the reporting person's tax withholding obligation for vesting dates on August 25, November 13, and November 14, 2025. As a result of an administrative error by the issuer's third-party service provider, cash was paid on behalf of the reporting person for tax withholding obligations on the vesting date, August 25, 2025. A corresponding sale of issuer common shares to cover the reporting person's tax withholding obligation on August 25, 2025 could not be completed until the opening of the issuer's next window period. Accordingly, the portion of the above shares attributed to the vesting on August 25, 2025 were sold November 17, 2025, the first available date during an open window period on which the shares could be sold on behalf of the reporting person.