[Form 4/A] Hyliion Holdings Corp. Amended Insider Trading Activity

Rhea-AI Filing Summary

Hyliion Holdings Corp. (HYLN) reported an administrative correction to insider ownership reporting rather than a new stock transaction. Chief Strategy Officer Cheri Lantz filed an amended Form 4 to fix an earlier report dated August 25, 2025. The original filing had shown common shares being withheld to cover taxes, using transaction code “F,” but the company now states that no shares were actually withheld on that date due to an administrative error by a third-party service provider. After the correction, Lantz is reported as directly owning 792,997 shares

11/18/2025 - 05:06 PM

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person^*

LANTZ CHERI

(Last) (First) (Middle)

C/O HYLIION HOLDING CORP.

1202 BMC DRIVE, SUITE 100

(Street)

CEDAR PARK TX 78613

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Hyliion Holdings Corp. [ HYLN ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Strategy Officer

3. Date of Earliest Transaction (Month/Day/Year)
08/25/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)
08/25/2025

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	08/25/2025		F(1)		0	D	$0	792,997	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. 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.

Remarks:

	/s/ Cheri Lantz	11/18/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What did Hyliion (HYLN) disclose in this amended Form 4/A?

The amended Form 4/A shows that Chief Strategy Officer Cheri Lantz corrected a prior insider ownership report. The earlier filing had reported common shares withheld to cover taxes on August 25, 2025, but this amendment states no shares were withheld and updates the beneficial ownership amount.

Who is the reporting person in this Hyliion (HYLN) Form 4/A?

The reporting person is Cheri Lantz, who serves as Hyliion Holdings Corp.’s Chief Strategy Officer. The form confirms her relationship to the issuer as an officer and indicates that the filing is made by one reporting person.

What was corrected in the August 25, 2025 Hyliion (HYLN) transaction report?

The correction removes a reference to shares of common stock that had been reported as withheld to satisfy taxes on August 25, 2025. The amendment explains that these shares were reported due to an administrative error and confirms that no shares were actually withheld on that date.

How many Hyliion (HYLN) shares does the insider report owning after the amendment?

After the correction, the filing reports that Cheri Lantz beneficially owns 792,997 shares of Hyliion common stock, held with direct ownership as shown in Column 5 of Table I.

Was there any actual stock transaction on August 25, 2025 for Hyliion (HYLN)?

The amended report indicates that although a transaction code “F” had been used previously (for shares withheld for taxes), the reference was erroneous. The explanation section states that no shares were withheld on August 25, 2025.

Does this Hyliion (HYLN) Form 4/A involve any derivative securities?

Table II for derivative securities is present but contains no completed entries. The amendment focuses on correcting the non-derivative common stock reporting in Table I.