FORM 4 [ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).         
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES
                                                                                  
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Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940
                      

1. Name and Address of Reporting Person *

Healy Thomas J.		 2. Issuer Name and Ticker or Trading Symbol

Hyliion Holdings Corp. [ HYLN ] 		5. Relationship of Reporting Person(s) to Issuer (Check all applicable)

__X__ Director                    __X__ 10% Owner
__X__ Officer (give title below)    _____ Other (specify below)
Chief Executive Officer
(Last)          (First)          (Middle)

1202 BMC DRIVE, SUITE 100		 3. Date of Earliest Transaction (MM/DD/YYYY)

6/30/2021
(Street)

CEDAR PARK, TX 78613
(City)        (State)        (Zip)
4. If Amendment, Date Original Filed (MM/DD/YYYY)

7/2/2021 
 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. Trans. Date 2A. Deemed Execution Date, if any 3. Trans. 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 6/30/2021  S(1)  200000 (2)D$11.654 (3)34472856 D  

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security
(Instr. 3)		2. Conversion or Exercise Price of Derivative Security3. Trans. Date3A. Deemed Execution Date, if any4. Trans. Code
(Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date7. 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 of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)11. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Explanation of Responses:
(1) The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person.
(2) On July 2, 2021, the Reporting Person filed a Form 4 (the "Original Form 4") which inadvertently reported the amount of securities disposed of as 100,000, when in fact, the amount should have been 200,000. The amount of securities beneficially owned following reported transaction on the Original Form 4 was correct.
(3) The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $11.49 to $11.8916, inclusive. Full information regarding the number of shares sold at each separate price will be provided upon request by the SEC staff, the issuer, or any security holder of the issuer.
Reporting Owners
Reporting Owner Name / Address
Relationships
Director10% OwnerOfficerOther
Healy Thomas J.
1202 BMC DRIVE
SUITE 100
CEDAR PARK, TX 78613		XXChief Executive Officer
Signatures
/s/ Thomas J. Healy7/7/2021
**Signature of Reporting PersonDate
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