Hyliion performance shares vest for Greg Standley

Hyliion Holdings Corp. (HYLN) reported that Chief Accounting Officer Greg Standley had two portions of Performance Stock Incentive Units vest on September 30, 2026: 16,633 units and 17,550 units.

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Rhea-AI Filing Summary

Hyliion Holdings Corp. (HYLN) reported that Chief Accounting Officer Greg Standley had two portions of Performance Stock Incentive Units vest on September 30, 2026: 16,633 units and 17,550 units. Half of the 16,633-unit portion is scheduled for issuance on September 30, 2027, with the remainder on December 31, 2027; the 17,550-unit portion is scheduled for issuance on December 31, 2028.

The vesting followed achievement of closing stock price thresholds of a minimum $4.00 per share over a 180-calendar-day average: 25% of the first PSU Award and 20% of the second vested under those thresholds.

Insider Trade Summary

34,183 shares exercised/converted

Exercise 4 txns

Insider Standley Greg

Role Chief Accounting Officer.

Type	Security	Shares	Price	Value
Conversion	Performance Stock Incentive Units ^F3	16,633	$0.00	$0.00
Conversion	Performance Stock Incentive Units ^F4	17,550	$0.00	$0.00
Conversion	Common Stock ^F1	16,633	$0.00	$0.00
Conversion	Common Stock ^F2	17,550	$0.00	$0.00

Holdings After Transaction: Performance Stock Incentive Units — 119,185 contracts (Direct); Common Stock — 287,751 shares (Direct)

Footnotes (4)

F1. The underlying market conditions for vesting of this portion of performance stock incentive units ("PSU Award") were satisfied on September 28, 2026, and subsequently approved by the Compensation Committee on September 30, 2026. Half of the vested PSUs will be issued on September 30, 2027 with the remainder to be issued on December 31, 2027.
F2. The underlying market conditions for vesting of this portion of performance stock incentive units ("PSU Award") were satisfied on September 28, 2026, and subsequently approved by the Compensation Committee on September 30, 2026. These vested PSUs will be issued on December 31, 2028.
F3. 25% of these PSU Awards vested upon the achievement of the underlying closing stock price threshold of a minimum of $4.00 per share over a 180-calendar-day average.
F4. 20% of these PSU Awards vested upon the achievement of the underlying closing stock price threshold of a minimum of $4.00 per share over a 180-calendar-day average.

Key Figures

PSU award portion: 16,633 units PSU award portion: 17,550 units Closing stock price threshold: $4.00 per share +3 more

6 metrics

PSU award portion 16,633 units Half scheduled for issuance September 30, 2027, and the remainder December 31, 2027

PSU award portion 17,550 units Scheduled for issuance December 31, 2028

Closing stock price threshold $4.00 per share Minimum threshold for vesting

Average period 180 calendar days Period for the closing stock price average

First PSU Award vesting 25% Vested upon achievement of the underlying closing stock price threshold

Second PSU Award vesting 20% Vested upon achievement of the underlying closing stock price threshold

Key Terms

Performance Stock Incentive Units, PSU Award, 180-calendar-day average

3 terms

Performance Stock Incentive Units financial

"portion of performance stock incentive units ("PSU Award")"

PSU Award financial

"performance stock incentive units ("PSU Award")"

180-calendar-day average technical

"minimum of $4.00 per share over a 180-calendar-day average"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

How many HYLN performance stock incentive units vested for Greg Standley?

Chief Accounting Officer Greg Standley reported vesting portions of 16,633 units and 17,550 units on September 30, 2026.

When are the HYLN shares from Greg Standley's PSU awards scheduled to issue?

Half of the 16,633-unit portion is scheduled for issuance on September 30, 2027, with the remainder on December 31, 2027. The 17,550-unit portion is scheduled for issuance on December 31, 2028.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 10/01/2026 - 06:00 PM Accepted by SEC EDGAR 10/01/2026 - 05:59 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).

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)
09/30/2026

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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	09/30/2026		C⁽¹⁾		16,633	A	$0	270,201	D
Common Stock	09/30/2026		C⁽²⁾		17,550	A	$0	287,751	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)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
Performance Stock Incentive Units	⁽³⁾	09/30/2026		C			16,633	02/18/2026	12/31/2027	Common Stock	16,633	$0	66,532	D
Performance Stock Incentive Units	⁽⁴⁾	09/30/2026		C			17,550	12/31/2028	12/31/2028	Common Stock	17,550	$0	52,653	D

Explanation of Responses:

1. The underlying market conditions for vesting of this portion of performance stock incentive units ("PSU Award") were satisfied on September 28, 2026, and subsequently approved by the Compensation Committee on September 30, 2026. Half of the vested PSUs will be issued on September 30, 2027 with the remainder to be issued on December 31, 2027.

2. The underlying market conditions for vesting of this portion of performance stock incentive units ("PSU Award") were satisfied on September 28, 2026, and subsequently approved by the Compensation Committee on September 30, 2026. These vested PSUs will be issued on December 31, 2028.

3. 25% of these PSU Awards vested upon the achievement of the underlying closing stock price threshold of a minimum of $4.00 per share over a 180-calendar-day average.

4. 20% of these PSU Awards vested upon the achievement of the underlying closing stock price threshold of a minimum of $4.00 per share over a 180-calendar-day average.

Remarks:

	/s/ Greg Standley	10/01/2026
	** 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)

Source: View Original Filing on SEC EDGAR