HYLN

Hyliion Holdings Corp.

A Texas-based energy technology company that builds the KARNO generator, a fuel-agnostic power module that turns heat directly into electricity using a modernized Stirling engine rather than traditional combustion. It can run on everything from natural gas and diesel to renewable hydrogen. Founder Thomas Healy started Hyliion in 2015 while studying at Carnegie Mellon, originally building hybrid systems for big-rig trucks before pivoting to power generation. The name blends "hybrid," "lithium," and "ion" — and Healy, a self-described gearhead and motorsports fan, dropped out of grad school to chase the idea.

CUSIP: 449109107IndustrialsUS1 holder

Ownership Activity Financials Filings

Insiders

Ranked by how much each holding moved in the last 6 months

Healy Thomas J.Chief Executive Officer, Director, 10% owner · 5 transactions

32.78M-7.4%

Cubbage Vincent T.Director · 2 transactions

1.13M+3.5%

Bought 50.0K

Mook Joshua T.Chief Technology Officer · 4 transactions

1.10M-2.9%

Panzer JonChief Financial Officer · 4 transactions

935.5K-4%

Oxholm Jose MiguelChief Legal&Compliance Officer · 4 transactions

799.8K-5.7%

Lantz CheriChief Strategy Officer · 1 transaction

730.2K-2.2%

Ramasamy GovindarajChief Commercial Officer · 5 transactions

593.9K-4.2%

Standley GregChief Accounting Officer. · 3 transactions

253.6K-5.6%

Insider	Stake change	Holds now	Granted / vested	Bought	Sold
Healy Thomas J.Chief Executive Officer, Director, 10% owner · 5 transactions	-7.4%	32.78M	—	—	—
Cubbage Vincent T.Director · 2 transactions	+3.5%	1.13M	—	50.0K	—
Mook Joshua T.Chief Technology Officer · 4 transactions	-2.9%	1.10M	—	—	—
Panzer JonChief Financial Officer · 4 transactions	-4%	935.5K	—	—	—
Oxholm Jose MiguelChief Legal&Compliance Officer · 4 transactions	-5.7%	799.8K	—	—	—
Lantz CheriChief Strategy Officer · 1 transaction	-2.2%	730.2K	—	—	—
Ramasamy GovindarajChief Commercial Officer · 5 transactions	-4.2%	593.9K	—	—	—
Standley GregChief Accounting Officer. · 3 transactions	-5.6%	253.6K	—	—	—

Select a row to see that insider’s individual transactions. Sum of the holdings confirmed in the 12 months before this insider's last filing. A Form 4 reports a holding per line — held directly, or through a named trust, partnership or foundation, and in each share class separately — never a person’s total. Lines not restated in that time are left out and shown apart: an active filer restates what they still hold, so a line they did not restate is more often an entity since renamed, whose shares a successor line reports too. An amber marker means some were left out.