Company facts
- Headquarters
- Boston, Massachusetts
- Most recent report
- 8-K, filed Jul 22, 2026
- Incorporated
- Delaware
- Filings on record
- 388 filings
- On EDGAR
- CIK 1744494
- Fiscal year ends
- December
- Filer status
- Non-accelerated filer Smaller reporting company
Financials 8 of 29
News 8 of 116
- 8-K Other events Jul 22, 2026
- 8-K Other events May 15, 2026
- 8-K Leadership change Jan 15, 2026
- 8-K Current report on a material event Nov 10, 2025
- 8-K Leadership change Nov 3, 2025
- 8-K Current report on a material event Oct 29, 2025
- 8-K Shareholder vote results Oct 22, 2025
- 8-K Current report on a material event Sep 12, 2025
Prospectuses and Registrations 8 of 55
- 25-NSE Notice that a security was delisted Jan 21, 2026
- 25-NSE Notice that a security was delisted Jan 21, 2026
- 424B3 Prospectus supplement for an offering Aug 27, 2025
- S-1 Registration statement for an offering Aug 18, 2025
- S-8 Registration statement for an employee plan Jul 18, 2025
- 424B5 Prospectus supplement for an offering Dec 28, 2023
- 424B5 Prospectus supplement for an offering Dec 27, 2023
- 424B5 Prospectus supplement for an offering Jun 2, 2023
Proxies 8 of 22
- DEF 14A Proxy statement for a shareholder vote Sep 30, 2025
- DEF 14A Proxy statement for a shareholder vote Dec 10, 2024
- DEF 14A Proxy statement for a shareholder vote Mar 29, 2024
- PRE 14A Preliminary proxy statement Mar 18, 2024
- DEFA14A Extra proxy material Apr 25, 2023
- DEF 14A Proxy statement for a shareholder vote Apr 25, 2023
- PRE 14A Preliminary proxy statement Apr 13, 2023
- DEFA14A Extra proxy material May 2, 2022
Ownership 8 of 119
- 4 Insider reported a trade Apr 2, 2025
- 3 Insider reported their initial holding Apr 2, 2025
- 3 Insider reported their initial holding Mar 11, 2025
- 3 Insider reported their initial holding Mar 11, 2025
- 3 Insider reported their initial holding Mar 11, 2025
- 3 Insider reported their initial holding Mar 11, 2025
- 3 Insider reported their initial holding Mar 11, 2025
- 4 Insider reported a trade Feb 20, 2024
Other 8 of 47
- NT 10-K Notice that an annual report will be late Mar 31, 2026
- NT 10-Q Notice that a quarterly report will be late Nov 14, 2025
- EFFECT Notice that a registration became effective Aug 27, 2025
- CORRESP Reply to SEC staff Aug 25, 2025
- UPLOAD Comment letter from SEC staff Aug 25, 2025
- NT 10-Q Notice that a quarterly report will be late May 14, 2025
- NT 10-K Notice that an annual report will be late Mar 31, 2025
- NT 10-Q Notice that a quarterly report will be late Nov 14, 2024
Everything here comes from Advent Technologies Holdings, Inc.'s own filings on SEC EDGAR. The filing list is rechecked every hour.