Hyliion (NYSE: HYLN) holder Jon Panzer plans 30,000-share sale

Rhea-AI Filing Summary

Hyliion Holdings Corp. (HYLN) reported a planned sale of its common stock under Rule 144 for the account of Jon Panzer. A brokerage firm, UBS Financial Services Inc., listed 30,000 shares of Hyliion common stock to be sold, with the securities identified as being held for employee benefit purposes.

The notice shows Hyliion common stock listed on the NYSE, and references an outstanding share figure of 178,600,000 shares, which serves as a baseline for the company’s equity as of the filing context.

Key Figures

Shares to be sold under Rule 144: 30,000 shares of common stock Approximate shares outstanding: 178,600,000 shares Form type: Form 144 +1 more

4 metrics

Shares to be sold under Rule 144 30,000 shares of common stock Planned sale for the account of Jon Panzer

Approximate shares outstanding 178,600,000 shares Hyliion Holdings Corp. common stock baseline figure cited in the notice

Form type Form 144 Notice of proposed sale of Hyliion Holdings Corp. common stock

Shares listed in securities information 30,000 shares Hyliion common stock identified for proposed sale

Key Terms

Rule 144, Form 144, attorney-in-fact, Employee Benefit

4 terms

Rule 144 regulatory

"See the definition of "person" in paragraph (a) of Rule 144."

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

Form 144 regulatory

"144: Filer Information"

Form 144 is a document that investors must file with the government when they plan to sell a large number of shares of a company's stock. It helps ensure transparency so everyone knows how many shares are being sold and when, which can impact the stock's price.

attorney-in-fact regulatory

"for UBS Financial Services Inc, as attorney-in-fact for Jon Panzer"

An attorney-in-fact is the person or entity given legal authority through a power of attorney to act on behalf of another for specific tasks, such as signing documents, voting shares, or handling transactions. For investors, this matters because it lets a trusted representative make timely decisions or complete paperwork when the owner cannot, much like handing keys to someone to run errands on your behalf—so checks on scope and limits of that authority are important.

Employee Benefit financial

"Common Stock | 08/20/2026 | Employee Benefit | Hyliion Holdings Corp"

FAQ

What transaction involving HYLN stock does this Form 144 report?

The filing reports a planned sale under Rule 144 of 30,000 shares of Hyliion Holdings Corp. (HYLN) common stock for the account of Jon Panzer through UBS Financial Services Inc.

Who is the person for whose account HYLN shares are to be sold?

The person for whose account Hyliion Holdings Corp. (HYLN) shares are to be sold is Jon Panzer, as identified in the Form 144 notice.

How many Hyliion (HYLN) shares are covered by this planned Rule 144 sale?

The planned Rule 144 sale for Hyliion (HYLN) covers 30,000 shares of common stock, as reported in the securities information and securities-to-be-sold sections.

What is the approximate number of Hyliion (HYLN) common shares outstanding cited in the filing?

The filing cites an approximate 178,600,000 Hyliion Holdings Corp. common shares outstanding, providing a baseline figure for the company’s equity.

Which broker is handling the planned HYLN Rule 144 sale?

The planned Rule 144 sale of Hyliion (HYLN) shares is listed through UBS Financial Services Inc., which appears as the broker in the securities information section.

What is the stated nature of the HYLN securities to be sold?

The securities to be sold are Hyliion (HYLN) common stock, and the nature of acquisition is described as Employee Benefit, with the consideration described as Cash.

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

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Available on EDGAR 08/21/2026 - 03:46 PM Accepted by SEC EDGAR 08/21/2026 - 03:45 PM Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001946212
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	Hyliion Holdings Corp
SEC File Number	001-38823
Address of Issuer	1202 BMC Drive Suite 100 Cedar Park TEXAS 78613
Phone	8334954466
Name of Person for Whose Account the Securities are To Be Sold	Jon Panzer
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Officer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common Stock	UBS Financial Services Inc 1000 Harbor Blvd 3rd Floor Weehawken NJ 07086	30000	100000	178600000	08/21/2026	NYSE

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common Stock	08/20/2026	Employee Benefit	Hyliion Holdings Corp			30000	08/20/2026	Cash

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Nothing to Report

144: Remarks and Signature

Remarks
Date of Notice	08/21/2026
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/JOSEPH CASSIDY, for UBS Financial Services Inc, as attorney-in-fact for Jon Panzer
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)