[Form 4] Hyliion Holdings Corp. Insider Trading Activity

Rhea-AI Filing Summary

Insider sale to cover taxes: Hyliion Holdings Corp. (HYLN) reported that Cheri Lantz, Chief Strategy Officer, disposed of 10,195 shares of common stock on 08/25/2025 at $1.77 per share. The filing states the sale was made to pay a tax liability arising from the vesting and distribution of restricted stock units. After the transaction, Lantz beneficially owned 782,802 shares, reported as direct ownership. The Form 4 is a routine disclosure showing share reduction tied to employee compensation tax withholding rather than an open-market investment decision.

Positive

• Transparent disclosure of the transaction and its purpose (tax withholding for vested RSUs)
• Reporting officer retains substantial ownership after the sale (782,802 shares)

Negative

• Disposition of 10,195 shares reduces the officer's direct holdings
• Sale occurred at $1.77 per share, reflecting the transaction price realized

Insights

Corporate Governance Expert

TL;DR: A routine RSU-tax withholding sale by an officer; not evidence of company-level governance issues.

The Form 4 shows an officer-covered tax-related disposition of 10,195 shares at $1.77 each, with beneficial ownership remaining at 782,802 shares. The filing explicitly states the sale funded a tax liability from vested restricted stock units, indicating a tax-necessitated transaction rather than discretionary selling. For governance review, this is a normal administrative action and does not indicate unusual insider behavior or change in alignment with shareholders.

Securities Analyst

TL;DR: Small-scale insider disposition tied to RSU vesting; immaterial for valuation absent further insider activity.

The transaction removed 10,195 shares at $1.77, reducing direct holdings to 782,802 shares. The explanation clearly attributes the sale to tax withholding on RSU distribution. Given the scale relative to total reported holdings, this sale is unlikely to affect market perceptions or company valuation by itself. Investors should note the factual reduction in share count held by the reporting officer but recognize the stated administrative purpose.

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

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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^*

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)

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)		10,195	D	$1.77	782,802	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 sold for the payment of a tax liability related to the vesting and distribution of restricted stock units.

Remarks:

	/s/ Cheri Lantz	08/25/2025
	** 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 Cheri Lantz disclose in the Form 4 for HYLN?

The filing reports a disposition of 10,195 common shares on 08/25/2025 at $1.77 per share to pay a tax liability from vested restricted stock units.

Why were the shares sold according to the Form 4?

The Form 4 states the shares were sold to pay a tax liability related to the vesting and distribution of restricted stock units.

How many HYLN shares does Cheri Lantz own after the transaction?

After the reported sale, Cheri Lantz beneficially owned 782,802 shares of Hyliion common stock.

When was the transaction reported on the Form 4?

The transaction date reported on the Form 4 is 08/25/2025.

What type of reporting form was filed for this insider activity?

An SEC Form 4 (Statement of Changes in Beneficial Ownership) was filed pursuant to Section 16(a).