Figures computed from official regulatory filings — .
Ownershipinsiders 0% · institutions 0%
In USD · as of Oct 5, 2026
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Hydrogen Engine Center, Inc., an alternative energy company, manufactures and installs power generation systems and engines for use in the types of distributive power applications. The company's products include generators and wet-sleeve engines. It serves power generation, agriculture, airport service vehicles, stranded power, and transportation markets; and industrial clients that use alternative fuels, such as hydrogen, natural gas, anhydrous ammonia, methanol, propane, syn-gas, landfill gas and other alternative fuels. The company was founded in 2005 and is based in Greeneville, Tennessee.
Market information source · Oct 5, 2026
Periods recorded in the consulted sources. These do not certify the legal dates of name changes.
SEC company identity · Oct 5, 2026
Open-market timeline · full history
7 buys20 sells— close pricebar = usd volume, √ scaleclick a period to filter the table
| Insider | Type | Value · USD | Signals | Details | |
|---|---|---|---|---|---|
| HOLLINGER THEODORE G | Sell | $15K | SEC | ||
| HOLLINGER THEODORE G |
| OtherD (derivative) |
| $312.2K |
| SEC |
| HOLLINGER THEODORE G | Sell | $1.5K | SEC |
| HOLLINGER THEODORE G | Gift | $12K | SEC |
| HOLLINGER THEODORE G | Gift | $12K | SEC |
| HOLLINGER THEODORE G | Gift | $12K | SEC |
| HOLLINGER THEODORE G | Gift | $12K | SEC |
| HOLLINGER THEODORE G | Gift | $12K | SEC |
| HOLLINGER THEODORE G | Gift | $12K | SEC |
| HOLLINGER THEODORE G | Gift | $12K | SEC |
| HOLLINGER THEODORE G | Gift | $24K | SEC |
| HOLLINGER THEODORE G | Gift | $24K | SEC |
| HOLLINGER THEODORE G | Gift | $24K | SEC |
| HOLLINGER THEODORE G | Gift | $24K | SEC |
| HOLLINGER THEODORE G | Gift | $24K | SEC |
| HOLLINGER THEODORE G | Gift | $24K | SEC |
| HOLLINGER THEODORE G | Gift | $24K | SEC |
| VANDERBROOK DONALD C | OtherD (derivative) | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| BATT SANDRA | OtherD (derivative) | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| TRIMBLE THOMAS | AwardD (derivative) | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| VANDERBROOK DONALD C | OtherD (derivative) | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| VANDERBROOK DONALD C | AwardD (derivative) | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| RUGGIERI PHILLIP G | OtherD (derivative) | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| RUGGIERI PHILLIP G | AwardD (derivative) | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| BERG EDWARD T | AwardD (derivative) | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |