Hyliion (HYLN) CAO has shares sold to cover tax withholding

Rhea-AI Filing Summary

Hyliion Holdings Corp. Chief Accounting Officer Greg Standley reported an administrative share transaction. On May 19, 2026, 3,981 shares of common stock were sold at $4.05 per share under the issuer’s award agreement to cover his tax withholding obligations at the issuer’s sole discretion. Following this, he directly holds 257,299 common shares, indicating a routine, tax-related adjustment rather than a discretionary market trade.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider Standley Greg

Role Chief Accounting Officer.

Type	Security	Shares	Price	Value
Other	Common Stock	3,981	$4.05	$16K

Holdings After Transaction: Common Stock — 257,299 shares (Direct, null)

Footnotes (1)

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Key Figures

Shares sold for tax withholding: 3,981 shares Sale price per share: $4.05/share Shares held after transaction: 257,299 shares

3 metrics

Shares sold for tax withholding 3,981 shares Common Stock transaction on May 19, 2026

Sale price per share $4.05/share Price for 3,981 Hyliion common shares

Shares held after transaction 257,299 shares Direct holdings of Greg Standley following Form 4

Key Terms

Form 4, award agreement, tax withholding obligations, Common Stock

4 terms

Form 4 regulatory

"Hyliion’s Chief Accounting Officer reported this administrative share transaction on Form 4."

Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.

award agreement financial

"These shares were sold at the direction of the issuer under the terms of the issuer's award agreement with the reporting person."

An award agreement is a legal contract that spells out the terms of a pay or equity grant—such as stock options, restricted shares, or cash bonuses—given to an employee, director or consultant. It describes what is being granted, any conditions for keeping it (for example, earning it over time or meeting performance targets), and what happens if the person leaves or breaks rules. Investors care because these agreements affect company costs, potential share dilution and how executives are motivated and rewarded.

tax withholding obligations financial

"the decision to sell shares to cover the reporting person's tax withholding obligations is at the sole discretion of the issuer."

Common Stock financial

"These shares were sold at the direction of the issuer under the terms of the issuer's award agreement"

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

Form 4 Insider Transactions: What Each Field Means →

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).

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^*

Standley Greg

(Last) (First) (Middle)

C/O HYLIION HOLDING CORP.

1202 BMC DRIVE, SUITE 100

(Street)

CEDAR PARK TEXAS 78613

(City) (State) (Zip)

UNITED STATES

(Country)

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 Accounting Officer.

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/19/2026

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

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

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

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	05/19/2026		J(1)		3,981	D	$4.05	257,299	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. 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.

Remarks:

	/s/ Greg Standley	05/21/2026
	** 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.
* Form 4: SEC 1474 (03-26)

FAQ

What insider transaction did Hyliion (HYLN) disclose for Greg Standley?

Hyliion disclosed that Chief Accounting Officer Greg Standley had 3,981 common shares sold on his behalf at $4.05 per share. The sale was directed by the issuer under an award agreement specifically to cover his tax withholding obligations.

Was the Hyliion (HYLN) insider transaction a discretionary sale by Greg Standley?

The transaction was not a discretionary market sale by Greg Standley. Shares were sold at the issuer’s direction under an award agreement, with the purpose of covering his tax withholding obligations rather than reflecting an independent trading decision.

How many Hyliion (HYLN) shares does Greg Standley hold after this filing?

After the reported transaction, Greg Standley directly holds 257,299 shares of Hyliion common stock. This remaining position shows the tax-related sale of 3,981 shares represents a small portion of his overall holdings reported in the filing.

What price was used for the Hyliion (HYLN) shares sold to cover taxes?

The 3,981 Hyliion common shares were sold at a price of $4.05 per share. This price is disclosed in the Form 4 and applies specifically to the tax-withholding related transaction executed under the issuer’s award agreement.

How is the Form 4 transaction for Hyliion (HYLN) classified?

The Form 4 classifies the event under code J as an “other acquisition or disposition.” Footnotes explain it represents shares sold at the issuer’s direction to satisfy Greg Standley’s tax withholding obligations under an existing award agreement.