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.
Granted 36.49M · Bought 250.0K · Sold 2.00M
Granted 16.66M
Granted 66.4K · Sold 977.1K
Sold 1.55M
Granted 265.3K · Bought 75.0K · Sold 202.5K
Granted 931.5K
Granted 1.43M · Bought 6.1K · Sold 400.0K
Granted 685.1K · Bought 140.0K
Granted 766.8K · Bought 5.5K
Granted 619.7K · Bought 20.0K
Granted 411.9K · Bought 60.0K
Granted 252.8K · Bought 150.0K
Granted 454.1K · Bought 62.0K
Granted 265.3K · Bought 110.0K
Granted 433.1K · Sold 68.6K
Granted 218.8K · Bought 65.0K
Granted 272.1K
Granted 256.4K
Granted 249.7K · Bought 5.0K
Granted 235.0K · Bought 2.0K
Granted 218.8K
Granted 218.5K
Granted 66.4K · Bought 5.0K · Sold 232.5K
Granted 66.4K · Bought 35.0K
Granted 57.6K
Bought 5.0K
Bought 5.0K
Bought 2.5K
| Insider | Stake change | Holds now | Granted / vested | Bought | Sold |
|---|---|---|---|---|---|
| Healy Thomas J.Chief Executive Officer, Director, 10% owner · 37 transactions | — | 32.78M | 36.49M | 250.0K | 2.00M |
| Jenkins Alexander H. +5 co-filers10% owner, Director, 10% owner · 1 transaction | — | 16.66Mas of Oct 2020 | 16.66M | — | — |
| TortoiseEcofin Borrower LLC +1 co-filer10% owner · 1 transaction | — | 5.33Mas of Oct 2020 | — | — | — |
| Jenkins Howard MDirector · 11 transactions | — | 5.21Mas of Mar 2023 | 66.4K | — | 977.1K |
| Polar Asset Management Partners Inc.10% owner · 4 transactions | — | 4.50Mas of Jun 2020 | — | — | 1.55M |
| Tortoise Sponsor LLC +2 co-filers10% owner · 1 transaction | — | 4.44Mas of Oct 2020 | — | — | — |
| Cubbage Vincent T.Director · 14 transactions | — | 1.13M | 265.3K | 75.0K | 202.5K |
| Mook Joshua T.Chief Technology Officer · 25 transactions | — | 1.10M | 931.5K | — | — |
| Olkkola Edward EDirector · 13 transactions | — | 1.04Mas of Feb 2022 | 1.43M | 6.1K | 400.0K |
| Panzer JonChief Financial Officer · 41 transactions | — | 935.5K | 685.1K | 140.0K | — |
| Oxholm Jose MiguelChief Legal&Compliance Officer · 46 transactions | — | 799.8K | 766.8K | 5.5K | — |
| 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 · 8 transactions | — | 375.3K | 265.3K | 110.0K | — |
| Sexton PatrickChief Technology Officer · 10 transactions | — | 364.5Kas of Apr 2022 | 433.1K | — | 68.6K |
| Freeland Richard JosephDirector · 5 transactions | — | 283.8K | 218.8K | 65.0K | — |
| Van de Vere GregChief Financial Officer · 2 transactions | — | 272.1Kas of Jan 2021 | 272.1K | — | — |
| Gustanski MaryDirector · 6 transactions | — | 256.4K | 256.4K | — | — |
| Standley GregChief Accounting Officer. · 52 transactions | — | 253.6K | 249.7K | 5.0K | — |
| Baker SherriChief Financial Officer · 7 transactions | — | 230.3Kas of Jun 2022 | 235.0K | 2.0K | — |
| Trent Melanie MontagueDirector · 4 transactions | — | 218.8K | 218.8K | — | — |
| Boehm Rodger LDirector · 4 transactions | — | 218.5K | 218.5K | — | — |
| Pang Stephen S.Director · 8 transactions | — | 130.0Kas of Mar 2023 | 66.4K | 5.0K | 232.5K |
| Card Andrew H JRDirector · 6 transactions | — | 101.4Kas of Nov 2023 | 66.4K | 35.0K | — |
| Chao Elaine L.Director · 3 transactions | — | 57.6Kas of Mar 2023 | 57.6K | — | — |
| Orekar Andrew J.Director · 1 transaction | — | 40.0Kas of Oct 2020 | — | — | — |
| Semple Frank MDirector · 1 transaction | — | 40.0Kas of Oct 2020 | — | — | — |
| Tassin Sidney LDirector · 1 transaction | — | 40.0Kas of Oct 2020 | — | — | — |
| Brock Darrell Jr.Vice President · 1 transaction | — | 5.0Kas of Mar 2019 | — | 5.0K | — |
| Schnitzer Steven C.VP, Gen. Counsel and Secretary · 1 transaction | — | 5.0Kas of Mar 2019 | — | 5.0K | — |
| Savage ConnieCFO and CAO · 1 transaction | — | 2.5Kas of Mar 2019 | — | 2.5K | — |
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.
Net open-market activity over all recorded history: -4.43M shares. Grants, option exercises and tax withholding are excluded — they are compensation mechanics, not decisions to buy or sell.