Joshua T. Mook - 26 Nov 2025 Form 4 Insider Report for Hyliion Holdings Corp. (HYLN)

Role
Chief Technology Officer
Signature
/s/ Joshua T. Mook
Issuer symbol
HYLN
Transactions as of
26 Nov 2025
Transactions value $
$997,483
Form type
4
Filing time
01 Dec 2025, 17:43:58
Previous filing
17 Nov 2025
Next filing
15 Dec 2025
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
MOOK JOSHUA T. Chief Technology Officer C/O HYLIION HOLDING CORP., 1202 BMC DRIVE, SUITE 100, CEDAR PARK /s/ Joshua T. Mook 01 Dec 2025 0002011297

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction HYLN Common Stock Award $1M +541K +106.5% $1.85 1.05M 26 Nov 2025 Direct F1
transaction HYLN Common Stock Tax liability -$2.52K -1.36K -0.13% $1.85 1.05M 27 Nov 2025 Direct F2
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 The Reporting Person received a grant of restricted stock units ("RSU Award") pursuant to the Issuer's 2024 Equity Incentive Plan. One-fifth (1/5) of the RSU Award will vest on November 26, 2026, one-fifth (1/5) of the RSU Award will vest on November 26, 2027, and three-fifths (3/5) of the RSU Award will vest on November 26, 2028.
F2 Shares withheld for the payment of a tax liability related to the vesting and distribution of restricted stock units.