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 5 years

Insider

Healy Thomas J.Chief Executive Officer, Director, 10% owner · 32 transactions

32.78M-3.8%

Granted 1.51M · Bought 250.0K · Sold 1.10M

Jenkins Howard MDirector · 9 transactions

5.21M+52034.4%

as of Mar 2023

Granted 56.4K · Sold 977.1K

Cubbage Vincent T.Director · 10 transactions

1.13M+8.8%

Granted 255.3K · Bought 50.0K · Sold 202.5K

Mook Joshua T.Chief Technology Officer · 25 transactions

1.10M—

Granted 931.5K

Olkkola Edward EDirector · 4 transactions

1.04M+3.8%

as of Feb 2022

Granted 131.4K · Bought 6.1K · Sold 100.0K

Panzer JonChief Financial Officer · 41 transactions

935.5K—

Granted 685.1K · Bought 140.0K

Oxholm Jose MiguelChief Legal&Compliance Officer · 44 transactions

799.8K+1310.2%

Granted 713.1K · Bought 2.5K

Lantz CheriChief Strategy Officer · 29 transactions

730.2K—

Granted 619.7K · Bought 20.0K

Ramasamy GovindarajChief Commercial Officer · 23 transactions

593.9K—

Granted 411.9K · Bought 60.0K

Craig Jeffrey ADirector · 7 transactions

402.8K—

Granted 252.8K · Bought 150.0K

Gallagher Dennis M.Chief Operating Officer · 21 transactions

402.8K—

as of Feb 2024

Granted 454.1K · Bought 62.0K

Knight Robert M JrDirector · 7 transactions

375.3K+3653.5%

Granted 255.3K · Bought 110.0K

Sexton PatrickChief Technology Officer · 5 transactions

364.5K+15%

as of Apr 2022

Granted 129.9K · Sold 68.6K

Freeland Richard JosephDirector · 5 transactions

283.8K—

Granted 218.8K · Bought 65.0K

Gustanski MaryDirector · 6 transactions

256.4K—

Granted 256.4K

Standley GregChief Accounting Officer. · 52 transactions

253.6K—

Granted 249.7K · Bought 5.0K

Baker SherriChief Financial Officer · 5 transactions

230.3K+202.7%

as of Jun 2022

Granted 158.9K · Bought 2.0K

Trent Melanie MontagueDirector · 4 transactions

218.8K—

Granted 218.8K

Boehm Rodger LDirector · 4 transactions

218.5K—

Granted 218.5K

Pang Stephen S.Director · 3 transactions

130.0K-56.5%

as of Mar 2023

Granted 56.4K · Sold 225.0K

Card Andrew H JRDirector · 4 transactions

101.4K+576.2%

as of Nov 2023

Granted 56.4K · Bought 30.0K

Chao Elaine L.Director · 3 transactions

57.6K—

as of Mar 2023

Granted 57.6K

Insider	Stake change	Holds now	Granted / vested	Bought	Sold
Healy Thomas J.Chief Executive Officer, Director, 10% owner · 32 transactions	-3.8%	32.78M	1.51M	250.0K	1.10M
Jenkins Howard MDirector · 9 transactions	+52034.4%	5.21Mas of Mar 2023	56.4K	—	977.1K
Cubbage Vincent T.Director · 10 transactions	+8.8%	1.13M	255.3K	50.0K	202.5K
Mook Joshua T.Chief Technology Officer · 25 transactions	—	1.10M	931.5K	—	—
Olkkola Edward EDirector · 4 transactions	+3.8%	1.04Mas of Feb 2022	131.4K	6.1K	100.0K
Panzer JonChief Financial Officer · 41 transactions	—	935.5K	685.1K	140.0K	—
Oxholm Jose MiguelChief Legal&Compliance Officer · 44 transactions	+1310.2%	799.8K	713.1K	2.5K	—
Lantz CheriChief Strategy Officer · 29 transactions	—	730.2K	619.7K	20.0K	—
Ramasamy GovindarajChief Commercial Officer · 23 transactions	—	593.9K	411.9K	60.0K	—
Craig Jeffrey ADirector · 7 transactions	—	402.8K	252.8K	150.0K	—
Gallagher Dennis M.Chief Operating Officer · 21 transactions	—	402.8Kas of Feb 2024	454.1K	62.0K	—
Knight Robert M JrDirector · 7 transactions	+3653.5%	375.3K	255.3K	110.0K	—
Sexton PatrickChief Technology Officer · 5 transactions	+15%	364.5Kas of Apr 2022	129.9K	—	68.6K
Freeland Richard JosephDirector · 5 transactions	—	283.8K	218.8K	65.0K	—
Gustanski MaryDirector · 6 transactions	—	256.4K	256.4K	—	—
Standley GregChief Accounting Officer. · 52 transactions	—	253.6K	249.7K	5.0K	—
Baker SherriChief Financial Officer · 5 transactions	+202.7%	230.3Kas of Jun 2022	158.9K	2.0K	—
Trent Melanie MontagueDirector · 4 transactions	—	218.8K	218.8K	—	—
Boehm Rodger LDirector · 4 transactions	—	218.5K	218.5K	—	—
Pang Stephen S.Director · 3 transactions	-56.5%	130.0Kas of Mar 2023	56.4K	—	225.0K
Card Andrew H JRDirector · 4 transactions	+576.2%	101.4Kas of Nov 2023	56.4K	30.0K	—
Chao Elaine L.Director · 3 transactions	—	57.6Kas of Mar 2023	57.6K	—	—

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.