Hyliion (HYLN) Form 144: 9,039 Shares Planned for Rule 144 Sale

Hyliion Holdings (HYLN) has a holder planning to sell restricted or control common shares under Rule 144.

Accepted by SEC EDGAR 11/17/2025 - 07:23 PM EST Learn about SEC filing dates

Rhea-AI Filing Summary

Hyliion Holdings (HYLN) has a holder planning to sell restricted or control common shares under Rule 144. The notice covers the proposed sale of 9,039 common shares through UBS Financial Services Inc., with an aggregate market value of $15,000, to be sold on or about 11/17/2025 on the NYSE. The securities were acquired on 11/17/2025 as an employee benefit, with the purchase price paid in cash. The filing also notes that 175,974,228 common shares were outstanding, providing context for the size of the planned sale.

FAQ

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

What does the Hyliion Holdings (HYLN) Form 144 filing disclose?

The Form 144 discloses a planned sale of 9,039 Hyliion common shares under Rule 144, with an aggregate market value of $15,000, to be sold on or about 11/17/2025 on the NYSE.

How many Hyliion (HYLN) shares are involved in this Rule 144 sale?

The notice covers a proposed sale of 9,039 common shares of Hyliion Holdings.

What is the reported value of the Hyliion (HYLN) shares to be sold?

The aggregate market value of the Hyliion common shares covered by the notice is $15,000.

When are the Hyliion (HYLN) shares expected to be sold under this Form 144?

The approximate date of sale reported is 11/17/2025, with the shares to be sold on the NYSE.

How and when were the Hyliion (HYLN) shares being sold acquired?

The 9,039 common shares were acquired on 11/17/2025 as an employee benefit, with the purchase price paid in cash.

How many Hyliion (HYLN) common shares were outstanding according to the notice?

The Form 144 reports that 175,974,228 common shares of Hyliion were outstanding, giving a baseline for the size of the planned sale.

Which broker is handling the planned Hyliion (HYLN) share sale under Rule 144?

The planned sale of 9,039 Hyliion common shares is listed as being through UBS Financial Services Inc. in Weehawken, New Jersey.

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

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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	0002011297
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	Joshua Mook
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	UBS Financial Services Inc 1000 Harbor Blvd 3rd Floor Weehawken NJ 07086	9039	15000	175974228	11/17/2025	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	11/17/2025	Employee Benefit	Hyliion Holdings			9039	11/17/2025	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	11/17/2025
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 Joshua Mook
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)