Fuel Tech, Inc. SEC filings FTEK
Fuel Tech, Inc. has 1,000 filings in SEC EDGAR's recent list, going back to Oct 28, 2003. Its latest annual report, Form 10-K, was filed on Mar 3, 2026 for the period ended Dec 31, 2025. The latest quarterly report (Form 10-Q) was filed on Nov 3, 2026, covering the quarter ended Sep 30, 2026. The most recent current report (Form 8-K) was filed on Nov 3, 2026 (results of operations). The company's fiscal year ends on December 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| 10-Q | Quarterly report | Nov 3, 2026 | Sep 30, 2026 |
| 8-K |
Current report
Results of operations
|
Nov 3, 2026 | Nov 3, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Oct 7, 2026 | — |
| 8-K |
Current report
Regulation FD disclosure
|
Sep 18, 2026 | Sep 14, 2026 |
| 4 | Insider transaction | Sep 3, 2026 | Sep 1, 2026 |
| 8-K |
Current report
Officer or director change
|
Sep 2, 2026 | Aug 27, 2026 |
| 3 | Initial insider ownership | Aug 19, 2026 | Jul 31, 2026 |
| 10-Q | Quarterly report | Aug 4, 2026 | Jun 30, 2026 |
| 8-K |
Current report
Results of operations
|
Aug 4, 2026 | Aug 4, 2026 |
| 8-K |
Current report
Officer or director change
|
Aug 4, 2026 | Jul 31, 2026 |
| 8-K |
Current report
Shareholder vote results
|
Jun 8, 2026 | Jun 4, 2026 |
| 4 | Insider transaction | Jun 5, 2026 | Jun 4, 2026 |
| 4 | Insider transaction | Jun 5, 2026 | Jun 4, 2026 |
| 4 | Insider transaction | Jun 5, 2026 | Jun 4, 2026 |
| 10-Q | Quarterly report | May 5, 2026 | Mar 31, 2026 |
| 8-K |
Current report
Results of operations
|
May 5, 2026 | May 5, 2026 |
| DEF 14A | Proxy statement | Apr 13, 2026 | Jun 4, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Apr 6, 2026 | — |
| 8-K |
Current report
Officer or director change
|
Mar 27, 2026 | Mar 24, 2026 |
| 4 | Insider transaction | Mar 27, 2026 | Mar 24, 2026 |
| 4 | Insider transaction | Mar 27, 2026 | Mar 24, 2026 |
| 4 | Insider transaction | Mar 27, 2026 | Mar 24, 2026 |
| 4 | Insider transaction | Mar 9, 2026 | Mar 6, 2026 |
| 10-K | Annual report | Mar 3, 2026 | Dec 31, 2025 |
| 8-K |
Current report
Results of operations
|
Mar 3, 2026 | Mar 3, 2026 |
| 8-K |
Current report
Officer or director change
|
Dec 12, 2025 | Dec 11, 2025 |
| 10-Q | Quarterly report | Nov 4, 2025 | Sep 30, 2025 |
| 8-K |
Current report
Results of operations
|
Nov 4, 2025 | Nov 4, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Nov 3, 2025 | — |
| 10-Q | Quarterly report | Aug 5, 2025 | Jun 30, 2025 |
| 8-K |
Current report
Results of operations
|
Aug 5, 2025 | Aug 5, 2025 |
| 8-K |
Current report
Shareholder vote results
|
Jun 10, 2025 | Jun 5, 2025 |
| 4 | Insider transaction | Jun 6, 2025 | Jun 4, 2025 |
| 4 | Insider transaction | Jun 6, 2025 | Jun 4, 2025 |
| 4 | Insider transaction | Jun 6, 2025 | Jun 4, 2025 |
| 144 | Notice of proposed sale | Jun 4, 2025 | — |
| 8-K |
Current report
Regulation FD disclosure
|
May 22, 2025 | May 21, 2025 |
| 10-Q | Quarterly report | May 12, 2025 | Mar 31, 2025 |
| 8-K |
Current report
Results of operations
|
May 12, 2025 | May 12, 2025 |
| DEF 14A | Proxy statement | Apr 21, 2025 | Jun 5, 2025 |
| 8-K |
Current report
Officer or director change
|
Apr 2, 2025 | Mar 27, 2025 |
| S-8 POS | Form s-8 pos | Apr 2, 2025 | — |
| S-8 | Employee stock plan registration | Apr 2, 2025 | — |
| 4 | Insider transaction | Apr 1, 2025 | Mar 28, 2025 |
| 10-K | Annual report | Mar 4, 2025 | Dec 31, 2024 |
| 8-K |
Current report
Results of operations
|
Mar 4, 2025 | Mar 4, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Feb 5, 2025 | — |
| 8-K |
Current report
Officer or director change
|
Dec 13, 2024 | Dec 12, 2024 |
| 8-K |
Current report
Regulation FD disclosure
|
Dec 4, 2024 | Dec 2, 2024 |
| 4 | Insider transaction | Nov 20, 2024 | Nov 19, 2024 |
| 4 | Insider transaction | Nov 19, 2024 | Nov 15, 2024 |
| 4 | Insider transaction | Nov 18, 2024 | Nov 12, 2024 |
| 10-Q | Quarterly report | Nov 6, 2024 | Sep 30, 2024 |
| 8-K |
Current report
Results of operations
|
Nov 6, 2024 | Nov 6, 2024 |
| 4 | Insider transaction | Sep 16, 2024 | Sep 12, 2024 |
| 4 | Insider transaction | Sep 16, 2024 | Sep 12, 2024 |
| 4 | Insider transaction | Aug 30, 2024 | Aug 28, 2024 |
| 8-K |
Current report
Regulation FD disclosure
|
Aug 27, 2024 | Aug 27, 2024 |
| 4 | Insider transaction | Aug 21, 2024 | Aug 12, 2024 |
| 4 | Insider transaction | Aug 12, 2024 | Aug 9, 2024 |
| 10-Q | Quarterly report | Aug 6, 2024 | Jun 30, 2024 |
| 8-K |
Current report
Results of operations
|
Aug 6, 2024 | Aug 6, 2024 |
| 8-K/A |
Amended current report
Bylaw or fiscal year change
|
Jun 28, 2024 | Jun 6, 2024 |
| 8-K |
Current report
Bylaw or fiscal year change
|
Jun 10, 2024 | Jun 6, 2024 |
| 8-K |
Current report
Shareholder vote results
|
Jun 10, 2024 | Jun 6, 2024 |
| 4 | Insider transaction | Jun 7, 2024 | Jun 5, 2024 |
| 4 | Insider transaction | Jun 7, 2024 | Jun 5, 2024 |
| 4 | Insider transaction | Jun 7, 2024 | Jun 5, 2024 |
| 10-Q | Quarterly report | May 7, 2024 | Mar 31, 2024 |
| 8-K |
Current report
Results of operations
|
May 7, 2024 | May 7, 2024 |
| DEF 14A | Proxy statement | Apr 15, 2024 | Jun 6, 2024 |
| PRE 14A | Preliminary proxy statement | Apr 4, 2024 | Jun 6, 2024 |
| 8-K |
Current report
Officer or director change
|
Mar 28, 2024 | Mar 26, 2024 |
| 10-K | Annual report | Mar 11, 2024 | Dec 31, 2023 |
| 8-K |
Current report
Results of operations
|
Mar 11, 2024 | Mar 11, 2024 |
| 8-K |
Current report
Officer or director change
|
Mar 6, 2024 | Feb 29, 2024 |
| 4 | Insider transaction | Mar 4, 2024 | Feb 29, 2024 |
| 4 | Insider transaction | Mar 4, 2024 | Feb 29, 2024 |
| 4 | Insider transaction | Mar 4, 2024 | Feb 29, 2024 |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 5, 2024 | — |
| 8-K |
Current report
Officer or director change
|
Dec 8, 2023 | Dec 7, 2023 |
| 10-Q | Quarterly report | Nov 7, 2023 | Sep 30, 2023 |
| 8-K |
Current report
Results of operations
|
Nov 7, 2023 | Nov 7, 2023 |
| 8-K |
Current report
Regulation FD disclosure
|
Sep 12, 2023 | Sep 12, 2023 |
| 4 | Insider transaction | Aug 14, 2023 | Aug 11, 2023 |
| 10-Q | Quarterly report | Aug 8, 2023 | Jun 30, 2023 |
| 8-K |
Current report
Results of operations
|
Aug 8, 2023 | Aug 8, 2023 |
| 8-K |
Current report
Shareholder vote results
|
Jun 12, 2023 | Jun 8, 2023 |
| 4 | Insider transaction | Jun 9, 2023 | Jun 7, 2023 |
| 4 | Insider transaction | Jun 9, 2023 | Jun 7, 2023 |
| 4 | Insider transaction | Jun 9, 2023 | Jun 7, 2023 |
| 8-K |
Current report
Officer or director change
|
May 10, 2023 | May 4, 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 19, 2023 | — |
| DEF 14A | Proxy statement | Apr 17, 2023 | Jun 8, 2023 |
| 10-K | Annual report | Mar 7, 2023 | Dec 31, 2022 |
| 8-K |
Current report
Results of operations
|
Mar 7, 2023 | Mar 7, 2023 |
| 8-K |
Current report
Officer or director change
|
Mar 3, 2023 | Mar 2, 2023 |
| SC 13G/A | Amended ownership over 5% (passive) | Jan 27, 2023 | — |
| 8-K |
Current report
Officer or director change
|
Dec 12, 2022 | Dec 8, 2022 |
| 10-Q | Quarterly report | Nov 8, 2022 | Sep 30, 2022 |
| 8-K |
Current report
Results of operations
|
Nov 8, 2022 | Nov 8, 2022 |
| 8-K |
Current report
Regulation FD disclosure
|
Sep 14, 2022 | Sep 14, 2022 |
| 10-Q | Quarterly report | Aug 10, 2022 | Jun 30, 2022 |
| 8-K |
Current report
Results of operations
|
Aug 10, 2022 | Aug 10, 2022 |
| 8-K |
Current report
Officer or director change
|
Jun 7, 2022 | Jun 2, 2022 |
| 4 | Insider transaction | Jun 6, 2022 | Jun 2, 2022 |
| 4 | Insider transaction | Jun 6, 2022 | Jun 2, 2022 |
| 4 | Insider transaction | Jun 6, 2022 | Jun 2, 2022 |
| 4 | Insider transaction | Jun 6, 2022 | Jun 2, 2022 |
| 4 | Insider transaction | Jun 6, 2022 | Jun 2, 2022 |
| 4 | Insider transaction | Jun 6, 2022 | Jun 2, 2022 |
| 8-K |
Current report
Shareholder vote results
|
Jun 3, 2022 | Jun 2, 2022 |
| 4 | Insider transaction | May 19, 2022 | May 17, 2022 |
| 10-Q | Quarterly report | May 10, 2022 | Mar 31, 2022 |
| 8-K |
Current report
Results of operations
|
May 10, 2022 | May 10, 2022 |
| DEF 14A | Proxy statement | Apr 11, 2022 | Jun 2, 2022 |
| 8-K |
Current report
Officer or director change
|
Apr 11, 2022 | Apr 6, 2022 |
| 10-K | Annual report | Mar 8, 2022 | Dec 31, 2021 |
| 8-K |
Current report
Results of operations
|
Mar 8, 2022 | Mar 8, 2022 |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 10, 2022 | — |
| SC 13G | Ownership over 5% (passive) | Jan 10, 2022 | — |
| 8-K |
Current report
Officer or director change
|
Dec 14, 2021 | Dec 9, 2021 |
| 10-Q | Quarterly report | Nov 9, 2021 | Sep 30, 2021 |
| 8-K |
Current report
Results of operations
|
Nov 9, 2021 | Nov 9, 2021 |
| 8-K |
Current report
Regulation FD disclosure
|
Sep 13, 2021 | Sep 13, 2021 |
| 10-Q | Quarterly report | Aug 10, 2021 | Jun 30, 2021 |
| 8-K |
Current report
Results of operations
|
Aug 10, 2021 | Aug 10, 2021 |
| 8-K |
Current report
Shareholder vote results
|
May 24, 2021 | May 20, 2021 |
| DEFA14A | Additional proxy material | May 13, 2021 | — |
| 10-Q | Quarterly report | May 12, 2021 | Mar 31, 2021 |
| 8-K |
Current report
Results of operations
|
May 12, 2021 | May 12, 2021 |
| 424B3 | Prospectus | Apr 1, 2021 | — |
| EFFECT | Filing | Mar 31, 2021 | — |
| CORRESP | Letter to the SEC | Mar 29, 2021 | — |
| S-3/A | Amendment no. 1 to form s-3 | Mar 26, 2021 | — |
| DEF 14A | Proxy statement | Mar 26, 2021 | May 20, 2021 |
| CORRESP | Letter to the SEC | Mar 15, 2021 | — |
| 10-K | Annual report | Mar 15, 2021 | Dec 31, 2020 |
| 8-K |
Current report
Results of operations
|
Mar 15, 2021 | Mar 15, 2021 |
| 8-K |
Current report
Officer or director change
|
Mar 3, 2021 | Feb 25, 2021 |
| UPLOAD | Letter from the SEC | Mar 2, 2021 | — |
| S-3 | Shelf registration | Feb 26, 2021 | — |
| D | Filing | Feb 26, 2021 | — |
| 8-K |
Current report
Material agreement, Unregistered share sale, Other events
|
Feb 18, 2021 | Feb 11, 2021 |
| SC 13G | Ownership over 5% (passive) | Feb 10, 2021 | — |
| 8-K |
Current report
Other events
|
Jan 12, 2021 | Jan 11, 2021 |
| 4 | Insider transaction | Jan 4, 2021 | Dec 31, 2020 |
| 4 | Insider transaction | Dec 29, 2020 | Dec 23, 2020 |
| 4 | Insider transaction | Dec 28, 2020 | Dec 22, 2020 |
| 4 | Insider transaction | Dec 28, 2020 | Dec 22, 2020 |
| 8-K |
Current report
Officer or director change
|
Dec 21, 2020 | Dec 16, 2020 |
| 8-K |
Current report
Other events
|
Dec 7, 2020 | Dec 4, 2020 |
| SC 13G/A | Amended ownership over 5% (passive) | Dec 7, 2020 | — |
| 4 | Insider transaction | Dec 4, 2020 | Dec 2, 2020 |
| 4 | Insider transaction | Nov 30, 2020 | Nov 25, 2020 |
| 4 | Insider transaction | Nov 27, 2020 | Nov 24, 2020 |
| 4 | Insider transaction | Nov 27, 2020 | Nov 24, 2020 |
| 8-K |
Current report
Results of operations
|
Nov 10, 2020 | Nov 10, 2020 |
| 10-Q | Quarterly report | Nov 10, 2020 | Sep 30, 2020 |
| 4 | Insider transaction | Sep 28, 2020 | Sep 25, 2020 |
| 4 | Insider transaction | Sep 24, 2020 | Sep 24, 2020 |
| 8-K |
Current report
Officer or director change
|
Sep 24, 2020 | Sep 24, 2020 |
| 8-K |
Current report
Listing notice
|
Sep 22, 2020 | Sep 22, 2020 |
| 8-K |
Current report
Regulation FD disclosure
|
Sep 14, 2020 | Sep 14, 2020 |
| 10-Q | Quarterly report | Aug 11, 2020 | Jun 30, 2020 |
| 8-K |
Current report
Results of operations
|
Aug 11, 2020 | Aug 11, 2020 |
| 8-K |
Current report
Shareholder vote results
|
Jun 17, 2020 | Jun 16, 2020 |
| 10-Q | Quarterly report | May 12, 2020 | Mar 31, 2020 |
| 8-K |
Current report
Results of operations
|
May 12, 2020 | May 12, 2020 |
| DEFA14A | Additional proxy material | May 11, 2020 | — |
| 3 | Initial insider ownership | Mar 26, 2020 | Mar 14, 2020 |
| DEF 14A | Proxy statement | Mar 25, 2020 | May 20, 2020 |
| 4 | Insider transaction | Mar 18, 2020 | Mar 17, 2020 |
| 4 | Insider transaction | Mar 17, 2020 | Mar 16, 2020 |
| PRE 14A | Preliminary proxy statement | Mar 13, 2020 | May 20, 2020 |
| 10-K | Annual report | Mar 12, 2020 | Dec 31, 2019 |
| 8-K |
Current report
Results of operations
|
Mar 12, 2020 | Mar 11, 2020 |
| 8-K |
Current report
Officer or director change
|
Mar 5, 2020 | Feb 28, 2020 |
| 8-K |
Current report
Officer or director change
|
Mar 2, 2020 | Feb 26, 2020 |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 3, 2020 | — |
| 8-K |
Current report
Listing notice
|
Jan 10, 2020 | Jan 7, 2020 |
| 4 | Insider transaction | Dec 17, 2019 | Dec 16, 2019 |
| 4 | Insider transaction | Dec 17, 2019 | Dec 16, 2019 |
| 8-K |
Current report
Officer or director change
|
Dec 12, 2019 | Dec 10, 2019 |
| 10-Q | Quarterly report | Nov 13, 2019 | Sep 30, 2019 |
| 8-K |
Current report
Results of operations
|
Nov 13, 2019 | Nov 13, 2019 |
| 4 | Insider transaction | Sep 26, 2019 | Sep 26, 2019 |
| 4 | Insider transaction | Sep 25, 2019 | Sep 25, 2019 |
| 8-K |
Current report
Regulation FD disclosure
|
Sep 9, 2019 | Sep 9, 2019 |
| 4 | Insider transaction | Sep 6, 2019 | Sep 6, 2019 |
| 4 | Insider transaction | Aug 28, 2019 | Aug 28, 2019 |
| 10-Q | Quarterly report | Aug 13, 2019 | Jun 30, 2019 |
| 8-K |
Current report
Results of operations
|
Aug 13, 2019 | Aug 13, 2019 |
| 4 | Insider transaction | Jun 18, 2019 | Jun 18, 2019 |
| 4 | Insider transaction | May 22, 2019 | May 22, 2019 |
| 4 | Insider transaction | May 20, 2019 | May 17, 2019 |
| 4 | Insider transaction | May 20, 2019 | May 17, 2019 |
| 4 | Insider transaction | May 20, 2019 | Aug 23, 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
- Industrial & Commercial Fans & Blowers & Air Purifing Equip (SIC 3564)
- Listed as
- FTEK (Nasdaq)
- Fiscal year ends
- December 31
- Incorporated in
- DE
- Headquarters
- Warrenville, IL
- SEC filer status
- Non-accelerated filer, Smaller reporting company
- SEC CIK
- 846913
- Former names
- FUEL TECH N V (until Oct 5, 2006)
Other Industrial & Commercial Fans & Blowers & Air Purifing Equip companies
- Madison Air Solutions Corp MAIR
- DONALDSON Co INC DCI
- Ceco Environmental Corp CECO
- Perma-Pipe International Holdings, Inc. PPIH
- Kronos Advanced Technologies Inc KNOS
All 6 Industrial & Commercial Fans & Blowers & Air Purifing Equip companies
Source: SEC EDGAR filings. This is company-reported data, not investment advice.