Financial Institutions Inc SEC filings FIISO
Financial Institutions Inc has 1,000 filings in SEC EDGAR's recent list, going back to Dec 5, 2014. Its latest annual report, Form ARS, was filed on Apr 6, 2026 for the period ended Dec 31, 2025. The latest quarterly report (Form 10-Q) was filed on Aug 3, 2026, covering the quarter ended Jun 30, 2026. The most recent current report (Form 8-K) was filed on Oct 29, 2026 (results of operations, regulation fd disclosure). The company's fiscal year ends on December 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| 424B3 | Prospectus | Feb 17, 2026 | — |
| S-4 | Registration for a merger or exchange | Jan 30, 2026 | — |
| S-8 | Employee stock plan registration | Aug 4, 2025 | — |
| 424B5 | Prospectus supplement | Dec 12, 2024 | — |
| FWP | Free writing prospectus | Dec 11, 2024 | — |
| 424B5 | Prospectus supplement | Dec 11, 2024 | — |
| S-3 | Shelf registration | Nov 26, 2024 | — |
| S-3 | Shelf registration | Oct 29, 2021 | — |
| S-8 | Employee stock plan registration | Oct 29, 2021 | — |
| 424B3 | Prospectus | Dec 22, 2020 | — |
| S-4 | Registration for a merger or exchange | Nov 30, 2020 | — |
| S-8 POS | Filing | Oct 25, 2018 | — |
| S-8 POS | Filing | Oct 25, 2018 | — |
| S-8 POS | Filing | Oct 25, 2018 | — |
| S-3 | Shelf registration | Aug 16, 2018 | — |
| 424B5 | Prospectus supplement | May 30, 2017 | — |
| FWP | Free writing prospectus | May 15, 2017 | — |
| 424B5 | Prospectus supplement | May 15, 2017 | — |
| S-8 | Employee stock plan registration | May 26, 2015 | — |
| 424B5 | Prospectus supplement | Apr 10, 2015 | — |
| FWP | Free writing prospectus | Apr 10, 2015 | — |
| 424B5 | Prospectus supplement | Apr 9, 2015 | — |
| S-3 | Shelf registration | Mar 16, 2015 | — |
Showing 23 filings. 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.
New to this? Read What Are SEC Filings? 10-K, 10-Q, 8-K and Other Forms Explained.
Company profile
- Industry
- National Commercial Banks (SIC 6021)
- Listed as
- FISI (Nasdaq), FIISO (OTC), FIISP (OTC)
- Fiscal year ends
- December 31
- Incorporated in
- NY
- Headquarters
- Warsaw, NY
- SEC filer status
- Accelerated filer
- SEC CIK
- 862831
- Former names
- FINANCIAL INSTITUTIONS INC (until Nov 3, 2026)
Other National Commercial Banks companies
Source: SEC EDGAR filings. This is company-reported data, not investment advice.