Hyliion Holdings Corp. SEC filings HYLN
Hyliion Holdings Corp. has 669 filings in SEC EDGAR's recent list, going back to Nov 20, 2018. Its latest annual report, Form 10-K, was filed on Feb 25, 2026 for the period ended Dec 31, 2025. The latest quarterly report (Form 10-Q) was filed on Aug 11, 2026, covering the quarter ended Jun 30, 2026. The most recent current report (Form 8-K) was filed on Oct 2, 2026 (officer or director change). The company's fiscal year ends on December 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| 8-K |
Current report
Officer or director change
|
Oct 2, 2026 | Sep 28, 2026 |
| CERT | Nyse texas certification | Sep 21, 2026 | — |
| 8-A12B | Filing | Sep 21, 2026 | — |
| S-8 | Employee stock plan registration | Aug 11, 2026 | — |
| 424B5 | Prospectus supplement | Aug 11, 2026 | — |
| 10-Q | Quarterly report | Aug 11, 2026 | Jun 30, 2026 |
| 8-K |
Current report
Results of operations
|
Aug 11, 2026 | Aug 11, 2026 |
| 8-K |
Current report
Other events
|
Jul 24, 2026 | Jul 21, 2026 |
| SD | Specialized disclosure (conflict minerals) | May 29, 2026 | — |
| 8-K |
Current report
Shareholder vote results
|
May 19, 2026 | May 19, 2026 |
| 10-Q | Quarterly report | May 12, 2026 | Mar 31, 2026 |
| 8-K |
Current report
Results of operations
|
May 12, 2026 | May 12, 2026 |
| DEF 14A | Proxy statement | Apr 8, 2026 | May 19, 2026 |
| EFFECT | Filing | Mar 5, 2026 | — |
| UPLOAD | Letter from the SEC | Mar 3, 2026 | — |
| CORRESP | Letter to the SEC | Mar 2, 2026 | — |
| S-3 | Shelf registration | Feb 25, 2026 | — |
| 10-K | Annual report | Feb 25, 2026 | Dec 31, 2025 |
| 8-K |
Current report
Results of operations
|
Feb 25, 2026 | Feb 24, 2026 |
| 10-Q | Quarterly report | Nov 12, 2025 | Sep 30, 2025 |
| 8-K |
Current report
Results of operations
|
Nov 12, 2025 | Nov 11, 2025 |
| 10-Q | Quarterly report | Aug 12, 2025 | Jun 30, 2025 |
| 8-K |
Current report
Results of operations
|
Aug 12, 2025 | Aug 12, 2025 |
| SD | Specialized disclosure (conflict minerals) | May 30, 2025 | — |
| 8-K |
Current report
Shareholder vote results
|
May 21, 2025 | May 20, 2025 |
| 10-Q | Quarterly report | May 13, 2025 | Mar 31, 2025 |
| 8-K |
Current report
Results of operations
|
May 13, 2025 | May 13, 2025 |
| DEF 14A | Proxy statement | Apr 8, 2025 | May 20, 2025 |
| 10-K | Annual report | Feb 25, 2025 | Dec 31, 2024 |
| 8-K |
Current report
Results of operations
|
Feb 25, 2025 | Feb 25, 2025 |
| 25 | Form 25 | Nov 15, 2024 | — |
| 10-Q | Quarterly report | Nov 14, 2024 | Sep 30, 2024 |
| 8-K |
Current report
Results of operations
|
Nov 14, 2024 | Nov 14, 2024 |
| CERT | Nyse american certification | Nov 6, 2024 | — |
| 8-A12B | For registration of certain classes | Nov 6, 2024 | — |
| 8-K |
Current report
Listing notice, Regulation FD disclosure
|
Nov 5, 2024 | Nov 5, 2024 |
| S-8 | Employee stock plan registration | Aug 6, 2024 | — |
| 10-Q | Quarterly report | Aug 6, 2024 | Jun 30, 2024 |
| 8-K |
Current report
Results of operations
|
Aug 6, 2024 | Aug 6, 2024 |
| SD | Specialized disclosure (conflict minerals) | May 30, 2024 | — |
| 8-K |
Current report
Shareholder vote results
|
May 23, 2024 | May 21, 2024 |
| DEFA14A | Additional proxy material | May 15, 2024 | — |
| 10-Q | Quarterly report | May 1, 2024 | Mar 31, 2024 |
| 8-K |
Current report
Results of operations
|
May 1, 2024 | Apr 30, 2024 |
| DEF 14A | Proxy statement | Apr 10, 2024 | May 21, 2024 |
| 8-K |
Current report
Other events
|
Apr 4, 2024 | Apr 4, 2024 |
| 8-K |
Current report
Listing notice
|
Mar 4, 2024 | Mar 4, 2024 |
| 8-K |
Current report
Officer or director change
|
Feb 13, 2024 | Feb 13, 2024 |
| 10-K | Annual report | Feb 13, 2024 | Dec 31, 2023 |
| 8-K |
Current report
Results of operations
|
Feb 13, 2024 | Feb 13, 2024 |
| 8-K |
Current report
Other events
|
Dec 20, 2023 | Dec 20, 2023 |
| 10-Q | Quarterly report | Nov 8, 2023 | Sep 30, 2023 |
| 8-K |
Current report
Results of operations
|
Nov 8, 2023 | Nov 8, 2023 |
| 8-K |
Current report
Regulation FD disclosure
|
Oct 10, 2023 | Oct 10, 2023 |
| 10-Q | Quarterly report | Aug 9, 2023 | Jun 30, 2023 |
| 8-K |
Current report
Results of operations
|
Aug 9, 2023 | Aug 8, 2023 |
| 8-K |
Current report
Regulation FD disclosure
|
Jun 27, 2023 | Jun 27, 2023 |
| SD | Specialized disclosure (conflict minerals) | May 30, 2023 | — |
| 8-K |
Current report
Shareholder vote results
|
May 25, 2023 | May 23, 2023 |
| 10-Q | Quarterly report | May 9, 2023 | Mar 31, 2023 |
| 8-K |
Current report
Results of operations
|
May 9, 2023 | May 9, 2023 |
| DEFA14A | Additional proxy material | Apr 10, 2023 | — |
| ARS | Annual report to shareholders | Apr 7, 2023 | Dec 31, 2022 |
| DEF 14A | Proxy statement | Apr 7, 2023 | — |
| 8-K |
Current report
Officer or director change
|
Mar 17, 2023 | Mar 17, 2023 |
| 8-K |
Current report
Other events
|
Mar 8, 2023 | Mar 6, 2023 |
| 10-K | Annual report | Feb 28, 2023 | Dec 31, 2022 |
| 8-K |
Current report
Results of operations
|
Feb 28, 2023 | Feb 28, 2023 |
| 8-K |
Current report
Other events
|
Feb 21, 2023 | Feb 17, 2023 |
| 8-K |
Current report
Other events
|
Feb 14, 2023 | Feb 13, 2023 |
| 8-K |
Current report
Officer or director change
|
Dec 21, 2022 | Dec 21, 2022 |
| 10-Q | Quarterly report | Nov 9, 2022 | Sep 30, 2022 |
| 8-K |
Current report
Results of operations
|
Nov 9, 2022 | Nov 8, 2022 |
| 8-K |
Current report
Other events
|
Sep 27, 2022 | Sep 27, 2022 |
| 8-K |
Current report
Officer or director change
|
Sep 12, 2022 | Sep 12, 2022 |
| 8-K |
Current report
Material agreement, Unregistered share sale, Regulation FD disclosure
|
Aug 25, 2022 | Aug 24, 2022 |
| 10-Q | Quarterly report | Aug 9, 2022 | Jun 30, 2022 |
| 8-K |
Current report
Results of operations
|
Aug 9, 2022 | Aug 9, 2022 |
| SD | Specialized disclosure (conflict minerals) | May 27, 2022 | — |
| 8-K |
Current report
Officer or director change
|
May 20, 2022 | May 19, 2022 |
| 8-K |
Current report
Shareholder vote results
|
May 13, 2022 | May 10, 2022 |
| 10-Q | Quarterly report | May 9, 2022 | Mar 31, 2022 |
| 8-K |
Current report
Results of operations
|
May 9, 2022 | May 9, 2022 |
| DEFA14A | Additional proxy material | Mar 25, 2022 | — |
| DEF 14A | Proxy statement | Mar 25, 2022 | May 10, 2022 |
| 10-K | Annual report | Feb 24, 2022 | Dec 31, 2021 |
| 8-K |
Current report
Results of operations
|
Feb 24, 2022 | Feb 23, 2022 |
| 8-K |
Current report
Officer or director change
|
Feb 1, 2022 | Jan 28, 2022 |
| 424B3 | Prospectus | Jan 28, 2022 | — |
| 424B3 | Prospectus | Jan 5, 2022 | — |
| EFFECT | Filing | Jan 4, 2022 | — |
| POS AM | Post-effective amendment no. 2 to form s-1 | Dec 30, 2021 | — |
| 424B3 | Prospectus | Nov 10, 2021 | — |
| 10-Q | Quarterly report | Nov 10, 2021 | Sep 30, 2021 |
| 8-K |
Current report
Results of operations
|
Nov 10, 2021 | Nov 9, 2021 |
| 424B3 | Prospectus | Oct 14, 2021 | — |
| 8-K |
Current report
Officer or director change
|
Oct 14, 2021 | Oct 13, 2021 |
| 424B3 | Prospectus | Aug 26, 2021 | — |
| 8-K |
Current report
Officer or director change
|
Aug 26, 2021 | Aug 24, 2021 |
| 424B3 | Prospectus | Aug 24, 2021 | — |
| 8-K |
Current report
Officer or director change
|
Aug 24, 2021 | Aug 19, 2021 |
| 424B3 | Prospectus | Aug 17, 2021 | — |
| 8-K |
Current report
Officer or director change
|
Aug 16, 2021 | Aug 10, 2021 |
| 424B3 | Prospectus | Aug 12, 2021 | — |
| 10-Q/A | Amended quarterly report | Aug 12, 2021 | Jun 30, 2021 |
| 424B3 | Prospectus | Aug 11, 2021 | — |
| 10-Q | Quarterly report | Aug 11, 2021 | Jun 30, 2021 |
| 8-K |
Current report
Results of operations
|
Aug 11, 2021 | Aug 10, 2021 |
| 424B3 | Prospectus | Jul 15, 2021 | — |
| EFFECT | Filing | Jul 14, 2021 | — |
| POS AM | Post-effective amendment no. 1 to registration statement | Jul 9, 2021 | — |
| 8-K |
Current report
Shareholder vote results
|
Jun 14, 2021 | Jun 8, 2021 |
| SD | Specialized disclosure (conflict minerals) | Jun 1, 2021 | — |
| 424B3 | Prospectus | May 24, 2021 | — |
| 424B3 | Prospectus | May 17, 2021 | — |
| 424B3 | Prospectus | May 17, 2021 | — |
| 10-Q | Quarterly report | May 17, 2021 | Mar 31, 2021 |
| 10-K/A | Amended annual report | May 17, 2021 | Dec 31, 2020 |
| 8-K |
Current report
Results of operations
|
May 12, 2021 | May 11, 2021 |
| 424B3 | Prospectus | May 11, 2021 | — |
| 424B3 | Prospectus | May 11, 2021 | — |
| 8-K |
Current report
Results of operations, Restatement
|
May 11, 2021 | May 10, 2021 |
| 424B3 | Prospectus | Apr 30, 2021 | — |
| DEFA14A | Additional proxy material | Apr 29, 2021 | — |
| DEF 14A | Proxy statement | Apr 29, 2021 | Jun 8, 2021 |
| 8-K |
Current report
Regulation FD disclosure
|
Apr 7, 2021 | Apr 7, 2021 |
| 8-K |
Current report
Officer or director change
|
Apr 1, 2021 | Mar 26, 2021 |
| 424B3 | Prospectus | Mar 31, 2021 | — |
| 424B3 | Prospectus | Feb 26, 2021 | — |
| 10-K | Annual report | Feb 26, 2021 | Dec 31, 2020 |
| 8-K |
Current report
Results of operations
|
Feb 24, 2021 | Feb 23, 2021 |
| 8-K |
Current report
Officer or director change
|
Jan 22, 2021 | Jan 15, 2021 |
| 8-K |
Current report
Officer or director change
|
Jan 12, 2021 | Jan 8, 2021 |
| 25-NSE | Delisting notice | Dec 30, 2020 | — |
| S-8 | Employee stock plan registration | Dec 14, 2020 | — |
| 8-K |
Current report
Officer or director change
|
Dec 7, 2020 | Dec 2, 2020 |
| 8-K |
Current report
Other events
|
Nov 30, 2020 | Nov 30, 2020 |
| EFFECT | Filing | Nov 27, 2020 | — |
| 424B3 | Prospectus | Nov 27, 2020 | — |
| CORRESP | Letter to the SEC | Nov 24, 2020 | — |
| CORRESP | Letter to the SEC | Nov 23, 2020 | — |
| S-1/A | Amended registration statement | Nov 23, 2020 | — |
| CORRESP | Letter to the SEC | Nov 20, 2020 | — |
| UPLOAD | Letter from the SEC | Nov 13, 2020 | — |
| 8-K/A | Amended current report | Nov 12, 2020 | Nov 12, 2020 |
| 10-Q | Quarterly report | Nov 12, 2020 | Sep 30, 2020 |
| 8-K |
Current report
Results of operations
|
Nov 12, 2020 | Nov 12, 2020 |
| 8-K |
Current report
Officer or director change
|
Oct 29, 2020 | Oct 23, 2020 |
| S-1 | Registration statement | Oct 23, 2020 | — |
| 8-K/A |
Amended current report
Bylaw or fiscal year change
|
Oct 7, 2020 | Oct 1, 2020 |
| 8-K |
Current report
Material agreement, Acquisition or sale of assets, Unregistered share sale, Change to shareholder rights, Auditor change, Change in control, Officer or director change
|
Oct 7, 2020 | Oct 1, 2020 |
| 25-NSE | Delisting notice | Oct 2, 2020 | — |
| 8-K |
Current report
Shareholder vote results, Other events
|
Oct 1, 2020 | Sep 28, 2020 |
| DEFA14A | Additional proxy material | Sep 28, 2020 | — |
| DEFA14A | Additional proxy material | Sep 28, 2020 | — |
| 8-K |
Current report
Regulation FD disclosure
|
Sep 28, 2020 | Sep 28, 2020 |
| DEFA14A | Additional proxy material | Sep 28, 2020 | — |
| DEFA14A | Additional proxy material | Sep 25, 2020 | — |
| DEFA14A | Additional proxy material | Sep 24, 2020 | — |
| 8-K |
Current report
Other events
|
Sep 24, 2020 | Sep 24, 2020 |
| DEFA14A | Additional proxy material | Sep 21, 2020 | — |
| DEFA14A | Additional proxy material | Sep 17, 2020 | — |
| DEFA14A | Additional proxy material | Sep 15, 2020 | — |
| DEFA14A | Additional proxy material | Sep 10, 2020 | — |
| DEFA14A | Additional proxy material | Sep 10, 2020 | — |
| UPLOAD | Letter from the SEC | Sep 8, 2020 | — |
| DEFM14A | Filing | Sep 8, 2020 | — |
| CORRESP | Letter to the SEC | Aug 31, 2020 | — |
| PRER14A | Amendment no. 2 to preliminary proxy statement | Aug 31, 2020 | — |
| UPLOAD | Letter from the SEC | Aug 26, 2020 | — |
| PRER14A | Revised preliminary proxy statement | Aug 14, 2020 | — |
| CORRESP | Letter to the SEC | Aug 13, 2020 | — |
| UPLOAD | Letter from the SEC | Aug 6, 2020 | — |
| 10-Q | Quarterly report | Aug 6, 2020 | Jun 30, 2020 |
| DEFA14A | Additional proxy material | Jul 30, 2020 | — |
| DEFA14A | Additional proxy material | Jul 29, 2020 | — |
| DEFA14A | Additional proxy material | Jul 21, 2020 | — |
| PREM14A | Form prem14a | Jul 10, 2020 | Jul 10, 2020 |
| DEFA14A | Additional proxy material | Jun 25, 2020 | — |
| 8-K |
Current report
Material agreement, Unregistered share sale, Regulation FD disclosure
|
Jun 19, 2020 | Jun 18, 2020 |
| DEFA14A | Additional proxy material | Jun 19, 2020 | — |
| 10-Q | Quarterly report | May 7, 2020 | Mar 31, 2020 |
| 10-K | Annual report | Mar 23, 2020 | Dec 31, 2019 |
| 8-K |
Current report
Officer or director change
|
Jan 24, 2020 | Jan 23, 2020 |
| 10-Q | Quarterly report | Nov 12, 2019 | Sep 30, 2019 |
| 10-Q | Quarterly report | Aug 12, 2019 | Jun 30, 2019 |
| 10-Q | Quarterly report | May 13, 2019 | Mar 31, 2019 |
| 8-K |
Current report
Regulation FD disclosure
|
Apr 19, 2019 | Apr 19, 2019 |
| 8-K |
Current report
Other events
|
Mar 8, 2019 | Mar 4, 2019 |
| 8-K |
Current report
Unregistered share sale, Officer or director change, Bylaw or fiscal year change, Regulation FD disclosure, Other events
|
Mar 5, 2019 | Feb 27, 2019 |
| 424B4 | Prospectus | Mar 1, 2019 | — |
| EFFECT | Filing | Feb 27, 2019 | — |
| CERT | Nyse certification filing-- tortoise acquisition corp. | Feb 27, 2019 | — |
| 8-A12B | Registration of certain classes of securities | Feb 27, 2019 | — |
| CORRESP | Letter to the SEC | Feb 25, 2019 | — |
| CORRESP | Letter to the SEC | Feb 25, 2019 | — |
| S-1/A | Amended registration statement | Feb 15, 2019 | — |
| S-1 | Registration statement | Feb 6, 2019 | — |
| DRSLTR | Filing | Dec 21, 2018 | — |
| DRS/A | Filing | Dec 21, 2018 | — |
Showing 200 filings, the most recent 200. Main filings leave out insider and ownership forms such as Form 4; choose a type above to see them. Each form opens on SEC.gov. Older filings are on SEC EDGAR.
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Company profile
- Industry
- Truck & Bus Bodies (SIC 3713)
- Listed as
- HYLN (NYSE)
- Fiscal year ends
- December 31
- Incorporated in
- DE
- Headquarters
- Cedar Park, TX
- SEC filer status
- Non-accelerated filer, Smaller reporting company
- SEC CIK
- 1759631
- Former names
- Tortoise Acquisition Corp. (until Sep 28, 2020)
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Source: SEC EDGAR filings. This is company-reported data, not investment advice.