[Form 4] Hyliion Holdings Corp. Insider Trading Activity

Rhea-AI Filing Summary

Jon Panzer, Chief Financial Officer of Hyliion Holdings Corp. (HYLN), filed a Form 4 reporting a transaction on 08/08/2025. The filing shows 741 shares were withheld to satisfy a tax liability related to the vesting and distribution of restricted stock units; the reported per-share amount associated with the transaction is $1.53.

After the withholding, Mr. Panzer is shown as directly beneficially owning 922,493 shares. The form contains no listed derivative transactions and is signed and dated 08/08/2025.

Insights

Financial Analyst

Routine insider tax-withholding on RSU vesting; minimal market impact and ownership remains substantial.

The Form 4 discloses a withholding of 741 shares at a reported value of $1.53 to cover taxes tied to restricted stock unit vesting. This is a non-sale, administrative transfer rather than an open-market disposition, and the reporting person retains 922,493 shares directly after the transaction. For investors, this is a standard equity-compensation event with no new derivative positions reported.

Corporate Governance Expert

Timely Form 4 filing shows standard RSU withholding; no governance concerns apparent from this disclosure.

The filing is signed and dated 08/08/2025 and explicitly explains the withholding as payment of a tax liability related to RSU distribution. Table II (derivatives) is empty, indicating no options or other derivative transactions reported. The disclosure meets Section 16 reporting expectations and does not indicate unusual insider activity.

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

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Panzer Jon

(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 Financial Officer

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

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

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	08/08/2025		F(1)		741	D	$1.53	922,493	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. Shares withheld for the payment of a tax liability related to the vesting and distribution of restricted stock units.

Remarks:

	/s/ Jon Panzer	08/08/2025
	** 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 transaction did the HYLN Form 4 report?

On 08/08/2025, the Form 4 reports 741 Hyliion shares were withheld to satisfy a tax liability related to the vesting and distribution of restricted stock units; the amount shown is $1.53 per share.

Who filed the Form 4 for HYLN?

The Form 4 was filed by Jon Panzer, identified as Chief Financial Officer (an officer) of Hyliion Holdings Corp.

How many Hyliion shares does Jon Panzer beneficially own after the transaction?

Following the reported withholding, Mr. Panzer is shown as directly beneficially owning 922,493 shares.

Were any derivative securities reported in this Form 4?

No. Table II for derivative securities is blank in the filing, so no options, warrants, or other derivatives were reported.

When was the Form 4 signed?

The Form 4 is signed and dated 08/08/2025 by Jon Panzer.