# HYDROGEN ENGINE CENTER, INC.

HYDROGEN ENGINE CENTER, INC. is a company headquartered in Algona, IA, United States.

## Company overview

- **Legal name:** HYDROGEN ENGINE CENTER, INC.
- **Former names in filing history:** GREEN MT LABS INC (2004-01-08 to 2005-09-07)
- **Classification:** Company
- **Industry (SIC):** 3510 — Engines & Turbines
- **Headquarters:** Algona, IA, United States
- **Incorporated in:** NV
- **Fiscal year end:** December 31
- **SEC CIK:** 0001272703

## About

HYDROGEN ENGINE CENTER, INC. is identified in the retained SEC EDGAR snapshot dated 2026-10-14. Its SEC Central Index Key is 0001272703, and its reported industry is Engines & Turbines. The retained history contains 12 filings, including SC 13G filed on 2009-07-14. Each filing retains its accession, filing date and original SEC document link. This historical evidence does not establish current registration, listing, ownership or financial condition.

## Recent SEC filings

- Form SC 13G — filed 2009-07-14 — SCHEDULE 13G
- Form 8-K — filed 2009-05-07 — period 2009-05-01
- Form SC 13D — filed 2009-04-08
- Form 10-K — filed 2009-03-31 — period 2008-12-31
- Form 8-K — filed 2009-03-24 — period 2009-03-24
- Form 8-K — filed 2009-02-25 — period 2009-02-23
- Form 8-K — filed 2009-01-21 — period 2009-01-15
- Form 8-K — filed 2008-11-26 — period 2008-11-21
- Form 10-Q — filed 2008-11-14 — period 2008-09-30
- Form 8-K — filed 2008-09-11 — period 2008-09-11
- Form 8-K — filed 2008-09-04 — period 2008-09-04
- Form 8-K — filed 2008-08-25 — period 2008-08-25

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Updated: 2026-10-23T22:53:27Z

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