Viskase Holdings, Inc. SEC filings VISK
Viskase Holdings, Inc. has 1,000 filings in SEC EDGAR's recent list, going back to Nov 17, 2004. Its latest annual report, Form 10-K, was filed on Mar 2, 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 May 5, 2026 (material agreement, change to shareholder rights, bylaw or fiscal year change, regulation fd disclosure). The company's fiscal year ends on December 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| 8-A12G | Filing | May 5, 2026 | — |
| 425 | Filing | Mar 25, 2026 | — |
| SC TO-I/A | Filing | Mar 25, 2026 | — |
| SC TO-I/A | Filing | Mar 24, 2026 | — |
| 8-A12G/A | Filing | Mar 24, 2026 | — |
| 425 | Filing | Mar 24, 2026 | — |
| 425 | Filing | Mar 19, 2026 | — |
| SC TO-I/A | Filing | Mar 19, 2026 | — |
| 8-A12G/A | Filing | Mar 18, 2026 | — |
| 425 | Filing | Mar 18, 2026 | — |
| 425 | Filing | Mar 16, 2026 | — |
| SC TO-I/A | Filing | Mar 16, 2026 | — |
| 8-A12G/A | Filing | Mar 11, 2026 | — |
| 425 | Filing | Mar 11, 2026 | — |
| SC TO-I/A | Filing | Mar 11, 2026 | — |
| 425 | Filing | Mar 9, 2026 | — |
| SC TO-I/A | Filing | Mar 9, 2026 | — |
| SC TO-I/A | Filing | Mar 3, 2026 | — |
| 8-A12G/A | Filing | Feb 27, 2026 | — |
| 425 | Filing | Feb 27, 2026 | — |
| SC TO-I/A | Filing | Feb 27, 2026 | — |
| SC 14F1 | Filing | Feb 26, 2026 | — |
| SC TO-I/A | Filing | Feb 11, 2026 | — |
| 425 | Filing | Feb 11, 2026 | — |
| EFFECT | Filing | Jan 30, 2026 | — |
| SC TO-I | Filing | Jan 30, 2026 | — |
| 8-A12G/A | Filing | Jan 30, 2026 | — |
| CORRESP | Letter to the SEC | Jan 28, 2026 | — |
| UPLOAD | Letter from the SEC | Dec 29, 2025 | — |
| 8-A12G/A | Filing | Dec 23, 2025 | — |
| DRS | Filing | Dec 19, 2025 | — |
| 425 | Filing | Oct 24, 2025 | — |
| 8-A12G/A | Filing | Sep 30, 2025 | — |
| 8-A12G/A | Filing | Aug 14, 2025 | — |
| 425 | Filing | Jun 23, 2025 | — |
| 8-A12G/A | Filing | Apr 1, 2025 | — |
| 8-A12G/A | Filing | May 22, 2024 | — |
| 8-A12G/A | Filing | Jun 8, 2021 | — |
| EFFECT | Filing | Nov 23, 2020 | — |
| CORRESP | Letter to the SEC | Nov 18, 2020 | — |
| UPLOAD | Letter from the SEC | Nov 17, 2020 | — |
| EFFECT | Filing | Sep 21, 2020 | — |
| CORRESP | Letter to the SEC | Sep 17, 2020 | — |
| UPLOAD | Letter from the SEC | Sep 8, 2020 | — |
| 8-A12G | Filing | Aug 14, 2020 | — |
| 15-12G | Deregistration | Feb 13, 2018 | — |
| 25-NSE | Delisting notice | Jun 10, 2016 | — |
| 8-A12B | Filing | May 1, 2014 | — |
| UPLOAD | Letter from the SEC | Oct 12, 2012 | — |
| CORRESP | Letter to the SEC | Sep 20, 2012 | — |
| UPLOAD | Letter from the SEC | Sep 7, 2012 | — |
| CORRESP | Letter to the SEC | Aug 13, 2012 | — |
| UPLOAD | Letter from the SEC | Jul 30, 2012 | — |
| DEFR14A | Filing | Jun 29, 2010 | — |
| PREC14A | Filing | May 14, 2010 | — |
| SC TO-I/A | Schedule to-i, amendment no. 2 | Mar 8, 2010 | — |
| SC TO-I/A | Filing | Feb 23, 2010 | — |
| SC TO-I | Filing | Feb 5, 2010 | — |
| SC TO-C | Form 8-k | Jan 29, 2010 | — |
| UPLOAD | Letter from the SEC | Dec 18, 2009 | — |
| CORRESP | Letter to the SEC | Nov 30, 2009 | — |
| CORRESP | Letter to the SEC | Nov 30, 2009 | — |
| UPLOAD | Letter from the SEC | Nov 25, 2009 | — |
| UPLOAD | Letter from the SEC | Nov 13, 2009 | — |
| 8-A12G/A | Filing | Jul 24, 2009 | — |
| DFAN14A | July 23, 2009 | Jul 23, 2009 | — |
| DFAN14A | July 21, 2009 | Jul 21, 2009 | — |
| DFAN14A | July 7, 2009 | Jul 7, 2009 | — |
| DFAN14A | June 17, 2009 | Jun 17, 2009 | — |
| DFAN14A | June 8, 2009 | Jun 10, 2009 | — |
| DFAN14A | June 4, 2009 | Jun 4, 2009 | — |
| PRRN14A | June 1, 2009 | Jun 1, 2009 | — |
| UPLOAD | Letter from the SEC | May 21, 2009 | — |
| DFAN14A | May 20, 2009 | May 20, 2009 | — |
| PRER14A | Filing | May 12, 2009 | — |
| PRRN14A | May 12, 2009 | May 12, 2009 | — |
| DFAN14A | May 7, 2009 | May 7, 2009 | — |
| UPLOAD | Letter from the SEC | May 7, 2009 | — |
| UPLOAD | Letter from the SEC | May 1, 2009 | — |
| DFAN14A | April 28, 2009 | Apr 28, 2009 | — |
| PREC14A | Filing | Apr 28, 2009 | — |
| DFAN14A | April 22, 2009 | Apr 22, 2009 | — |
| PREC14A | April 21, 2009 | Apr 22, 2009 | — |
| CT ORDER | Filing | Apr 2, 2009 | — |
| UPLOAD | Letter from the SEC | Feb 9, 2009 | — |
| SC TO-I/A | Filing | Jan 22, 2009 | — |
| CORRESP | Letter to the SEC | Jan 8, 2009 | — |
| SC TO-I/A | Filing | Jan 8, 2009 | — |
| SC TO-I | Filing | Dec 8, 2008 | — |
| SC TO-C | Form 8-k | Dec 4, 2008 | — |
| CORRESP | Letter to the SEC | Oct 30, 2008 | — |
| UPLOAD | Letter from the SEC | Oct 20, 2008 | — |
| 8-A12G/A | Amendment no. 2 to form 8-a12g | Jan 8, 2008 | — |
| UPLOAD | Letter from the SEC | Aug 23, 2007 | — |
| CORRESP | Letter to the SEC | Jul 25, 2007 | — |
| CORRESP | Letter to the SEC | Jun 22, 2007 | — |
| UPLOAD | Letter from the SEC | Jun 13, 2007 | — |
| EFFECT | Filing | Nov 3, 2006 | — |
| SC TO-I/A | Amend. no.3 | Jul 6, 2006 | — |
| UPLOAD | Letter from the SEC | Jun 28, 2006 | — |
| CORRESP | Letter to the SEC | Jun 23, 2006 | — |
| SC TO-I/A | Schedule to-ia | Jun 23, 2006 | — |
| SC TO-I/A | Amend. no.1 | Jun 12, 2006 | — |
| SC TO-I | Schedule to-i | Jun 6, 2006 | — |
| UPLOAD | Letter from the SEC | Mar 30, 2006 | — |
| CORRESP | Letter to the SEC | Mar 29, 2006 | — |
| NT 10-K | Form 12b25 - annual report on 10k for 6/30/05 | Sep 13, 2005 | Jun 30, 2005 |
Showing 107 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.
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Company profile
- Industry
- Biological Products, (No Diagnostic Substances) (SIC 2836)
- Listed as
- VISK (OTC)
- Fiscal year ends
- December 31
- Incorporated in
- DE
- Headquarters
- Lombard, IL
- SEC filer status
- Non-accelerated filer, Smaller reporting company
- SEC CIK
- 727510
- Former names
- ENZON PHARMACEUTICALS, INC. (until Mar 25, 2026); ENZON PHARMACEUTICALS INC (until Feb 23, 2016); ENZON PHARMACEUTICALS INC (until Mar 22, 2006); ENZON PHARMACEUTICAL INC (until Dec 10, 2002); ENZON INC (until Dec 9, 2002)
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All 182 Biological Products, (No Diagnostic Substances) companies
Source: SEC EDGAR filings. This is company-reported data, not investment advice.