Cytosorbents Corp SEC filings CTSO
Cytosorbents Corp has 977 filings in SEC EDGAR's recent list, going back to Mar 29, 2004. Its latest annual report, Form ARS, was filed on Jun 25, 2026 for the period ended Dec 31, 2025. The latest quarterly report (Form 10-Q) was filed on Aug 6, 2026, covering the quarter ended Jun 30, 2026. The most recent current report (Form 8-K) was filed on Sep 23, 2026 (regulation fd disclosure, other events). The company's fiscal year ends on December 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| 4 | Insider transaction | Sep 16, 2026 | Sep 15, 2026 |
| 4 | Insider transaction | Sep 16, 2026 | Sep 14, 2026 |
| 4 | Insider transaction | Sep 16, 2026 | Sep 15, 2026 |
| 4 | Insider transaction | Sep 9, 2026 | Sep 4, 2026 |
| 4 | Insider transaction | Jun 16, 2026 | Jun 15, 2026 |
| 4 | Insider transaction | Jun 15, 2026 | Jun 12, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Feb 13, 2026 | — |
| 4 | Insider transaction | Nov 20, 2025 | Nov 18, 2025 |
| 144 | Notice of proposed sale | Aug 19, 2025 | — |
| 4 | Insider transaction | Aug 8, 2025 | Aug 8, 2025 |
| 4 | Insider transaction | Aug 8, 2025 | Aug 8, 2025 |
| 4 | Insider transaction | Aug 8, 2025 | Aug 8, 2025 |
| 4 | Insider transaction | Aug 8, 2025 | Aug 8, 2025 |
| 4 | Insider transaction | Aug 8, 2025 | Aug 8, 2025 |
| 4 | Insider transaction | Aug 8, 2025 | Aug 8, 2025 |
| 4 | Insider transaction | Aug 8, 2025 | Aug 8, 2025 |
| 4 | Insider transaction | Aug 8, 2025 | Aug 8, 2025 |
| SCHEDULE 13G | Ownership over 5% (passive) | May 28, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Apr 30, 2025 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Apr 17, 2025 | — |
| 4 | Insider transaction | Mar 4, 2025 | Feb 24, 2025 |
| 4 | Insider transaction | Feb 26, 2025 | Feb 24, 2025 |
| 4 | Insider transaction | Feb 26, 2025 | Feb 24, 2025 |
| 4 | Insider transaction | Feb 26, 2025 | Feb 24, 2025 |
| 4 | Insider transaction | Feb 26, 2025 | Feb 24, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Feb 14, 2025 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Jan 31, 2025 | — |
| 4 | Insider transaction | Jan 22, 2025 | Jan 17, 2025 |
| 4 | Insider transaction | Jan 22, 2025 | Jan 17, 2025 |
| 4 | Insider transaction | Jan 22, 2025 | Jan 17, 2025 |
| 4 | Insider transaction | Jan 22, 2025 | Jan 17, 2025 |
| 4 | Insider transaction | Jan 22, 2025 | Jan 17, 2025 |
| 4 | Insider transaction | Jan 22, 2025 | Jan 17, 2025 |
| SCHEDULE 13G | Ownership over 5% (passive) | Jan 17, 2025 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Jan 7, 2025 | — |
| 4 | Insider transaction | Dec 16, 2024 | Dec 13, 2024 |
| 4 | Insider transaction | Dec 13, 2024 | Dec 11, 2024 |
| SC 13G/A | Amended ownership over 5% (passive) | Nov 14, 2024 | — |
| 4 | Insider transaction | Oct 8, 2024 | Oct 4, 2024 |
| 4 | Insider transaction | Oct 8, 2024 | Oct 4, 2024 |
| 4 | Insider transaction | Aug 16, 2024 | Aug 14, 2024 |
| 3 | Initial insider ownership | Aug 16, 2024 | Aug 14, 2024 |
| 4 | Insider transaction | Apr 4, 2024 | Apr 2, 2024 |
| 4 | Insider transaction | Apr 4, 2024 | Apr 2, 2024 |
| 4 | Insider transaction | Apr 4, 2024 | Apr 2, 2024 |
| 4 | Insider transaction | Apr 4, 2024 | Apr 2, 2024 |
| 4 | Insider transaction | Apr 4, 2024 | Apr 2, 2024 |
| 4 | Insider transaction | Apr 4, 2024 | Apr 2, 2024 |
| 4 | Insider transaction | Apr 4, 2024 | Apr 2, 2024 |
| 4 | Insider transaction | Apr 4, 2024 | Apr 2, 2024 |
| 4 | Insider transaction | Apr 2, 2024 | Mar 29, 2024 |
| 4 | Insider transaction | Apr 2, 2024 | Mar 23, 2024 |
| 4 | Insider transaction | Apr 2, 2024 | Mar 29, 2024 |
| 4 | Insider transaction | Apr 2, 2024 | Mar 29, 2024 |
| SC 13G | Ownership over 5% (passive) | Feb 14, 2024 | — |
| SC 13G | Ownership over 5% (passive) | Feb 14, 2024 | — |
| SC 13G | Ownership over 5% (passive) | Jan 8, 2024 | — |
| 4 | Insider transaction | Dec 15, 2023 | Dec 13, 2023 |
| 4 | Insider transaction | Dec 15, 2023 | Dec 13, 2023 |
| 4 | Insider transaction | Dec 15, 2023 | Dec 13, 2023 |
| 4 | Insider transaction | Dec 15, 2023 | Dec 13, 2023 |
| 4 | Insider transaction | Dec 15, 2023 | Dec 13, 2023 |
| 4 | Insider transaction | Dec 15, 2023 | Dec 13, 2023 |
| 4 | Insider transaction | Dec 15, 2023 | Dec 13, 2023 |
| 4 | Insider transaction | Dec 15, 2023 | Dec 13, 2023 |
| 4 | Insider transaction | Sep 20, 2023 | Sep 18, 2023 |
| 3 | Initial insider ownership | Aug 15, 2023 | Aug 7, 2023 |
| 4 | Insider transaction | Aug 8, 2023 | Aug 4, 2023 |
| 4 | Insider transaction | Jul 11, 2023 | Jul 7, 2023 |
| 4 | Insider transaction | Jul 11, 2023 | Jul 7, 2023 |
| 4 | Insider transaction | Jul 11, 2023 | Jul 7, 2023 |
| 4 | Insider transaction | Jul 11, 2023 | Jul 7, 2023 |
| 4 | Insider transaction | Jul 11, 2023 | Jul 7, 2023 |
| 4 | Insider transaction | Jul 11, 2023 | Jul 7, 2023 |
| 4 | Insider transaction | Jul 11, 2023 | Jul 7, 2023 |
| 4 | Insider transaction | Jul 11, 2023 | Jul 7, 2023 |
| 4 | Insider transaction | May 30, 2023 | May 25, 2023 |
| 4 | Insider transaction | May 12, 2023 | May 10, 2023 |
| 4 | Insider transaction | Apr 5, 2023 | Apr 4, 2023 |
| 4 | Insider transaction | Apr 5, 2023 | Apr 3, 2023 |
| 4 | Insider transaction | Mar 1, 2023 | Feb 27, 2023 |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 14, 2023 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 9, 2023 | — |
| 4 | Insider transaction | Feb 8, 2023 | Feb 6, 2023 |
| SC 13G | Ownership over 5% (passive) | Feb 7, 2023 | — |
| 4 | Insider transaction | Dec 9, 2022 | Dec 8, 2022 |
| 4 | Insider transaction | Dec 8, 2022 | Dec 6, 2022 |
| 4 | Insider transaction | Sep 12, 2022 | Sep 8, 2022 |
| 4 | Insider transaction | Aug 26, 2022 | Aug 25, 2022 |
| 4 | Insider transaction | Aug 12, 2022 | Aug 10, 2022 |
| 4 | Insider transaction | Aug 12, 2022 | Aug 10, 2022 |
| 4 | Insider transaction | Aug 12, 2022 | Aug 10, 2022 |
| 4 | Insider transaction | Aug 12, 2022 | Aug 10, 2022 |
| 4 | Insider transaction | Aug 12, 2022 | Aug 10, 2022 |
| 4 | Insider transaction | Aug 12, 2022 | Aug 10, 2022 |
| 4 | Insider transaction | Aug 12, 2022 | Aug 10, 2022 |
| 4 | Insider transaction | Aug 12, 2022 | Aug 10, 2022 |
| 4 | Insider transaction | Aug 12, 2022 | Aug 10, 2022 |
| SC 13G | Ownership over 5% (passive) | Aug 11, 2022 | — |
| SC 13G | Ownership over 5% (passive) | Jul 8, 2022 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Jun 28, 2022 | — |
| 4 | Insider transaction | Jun 22, 2022 | Jun 21, 2022 |
| 4 | Insider transaction | Jun 21, 2022 | Jun 16, 2022 |
| 4 | Insider transaction | Jun 21, 2022 | Jun 16, 2022 |
| 4 | Insider transaction | Jun 10, 2022 | Jun 9, 2022 |
| 4 | Insider transaction | Jun 6, 2022 | Jun 6, 2022 |
| 4 | Insider transaction | May 25, 2022 | May 23, 2022 |
| 4 | Insider transaction | May 19, 2022 | May 18, 2022 |
| 4 | Insider transaction | May 17, 2022 | May 16, 2022 |
| 4 | Insider transaction | May 12, 2022 | May 11, 2022 |
| 4 | Insider transaction | May 9, 2022 | May 6, 2022 |
| SC 13G | Ownership over 5% (passive) | Apr 25, 2022 | — |
| 4 | Insider transaction | Apr 5, 2022 | Apr 5, 2022 |
| 3 | Initial insider ownership | Apr 5, 2022 | Apr 1, 2022 |
| 4 | Insider transaction | Feb 15, 2022 | Feb 14, 2022 |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 9, 2022 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 3, 2022 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Jan 7, 2022 | — |
| 4 | Insider transaction | Jan 3, 2022 | Dec 29, 2021 |
| 4 | Insider transaction | Dec 13, 2021 | Dec 9, 2021 |
| SC 13G | Ownership over 5% (passive) | Dec 13, 2021 | — |
| 4 | Insider transaction | Dec 13, 2021 | Dec 10, 2021 |
| 4 | Insider transaction | Nov 26, 2021 | Nov 23, 2021 |
| 4 | Insider transaction | Sep 2, 2021 | Aug 31, 2021 |
| 4 | Insider transaction | Apr 14, 2021 | Apr 12, 2021 |
| 4 | Insider transaction | Apr 14, 2021 | Apr 12, 2021 |
| 4 | Insider transaction | Apr 14, 2021 | Apr 12, 2021 |
| 4 | Insider transaction | Apr 14, 2021 | Apr 12, 2021 |
| 4 | Insider transaction | Apr 14, 2021 | Apr 12, 2021 |
| 4 | Insider transaction | Apr 14, 2021 | Apr 12, 2021 |
| 4 | Insider transaction | Apr 14, 2021 | Apr 12, 2021 |
| 4 | Insider transaction | Apr 14, 2021 | Apr 12, 2021 |
| SC 13G | Ownership over 5% (passive) | Feb 10, 2021 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Jan 29, 2021 | — |
| 4 | Insider transaction | Jan 4, 2021 | Dec 31, 2020 |
| 4 | Insider transaction | Nov 12, 2020 | Nov 10, 2020 |
| 4 | Insider transaction | Aug 20, 2020 | Aug 18, 2020 |
| 4 | Insider transaction | Aug 4, 2020 | Jul 31, 2020 |
| 4 | Insider transaction | May 7, 2020 | May 5, 2020 |
| 4 | Insider transaction | May 7, 2020 | May 5, 2020 |
| 4 | Insider transaction | May 5, 2020 | Apr 12, 2020 |
| 3 | Initial insider ownership | May 5, 2020 | May 1, 2020 |
| 4 | Insider transaction | Apr 29, 2020 | Apr 27, 2020 |
| 4 | Insider transaction | Mar 12, 2020 | Mar 10, 2020 |
| 4 | Insider transaction | Mar 3, 2020 | Feb 28, 2020 |
| 4 | Insider transaction | Mar 3, 2020 | Feb 28, 2020 |
| 4 | Insider transaction | Mar 3, 2020 | Feb 28, 2020 |
| 4 | Insider transaction | Mar 3, 2020 | Feb 28, 2020 |
| 4 | Insider transaction | Mar 3, 2020 | Feb 28, 2020 |
| 4 | Insider transaction | Mar 3, 2020 | Feb 28, 2020 |
| 4 | Insider transaction | Mar 3, 2020 | Feb 28, 2020 |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 5, 2020 | — |
| 4 | Insider transaction | Dec 10, 2019 | Dec 10, 2019 |
| 4 | Insider transaction | Dec 6, 2019 | Dec 6, 2019 |
| 4 | Insider transaction | Nov 26, 2019 | Nov 26, 2019 |
| 4 | Insider transaction | Aug 19, 2019 | Aug 15, 2019 |
| 4 | Insider transaction | Aug 16, 2019 | Aug 16, 2019 |
| 4 | Insider transaction | Aug 16, 2019 | Aug 16, 2019 |
| 4 | Insider transaction | Aug 16, 2019 | Aug 14, 2019 |
| 3/A | Ownership document | Aug 16, 2019 | Jun 1, 2017 |
| 4 | Insider transaction | Aug 13, 2019 | Aug 9, 2019 |
| 4 | Insider transaction | Jul 24, 2019 | Jul 22, 2019 |
| 4 | Insider transaction | Jul 24, 2019 | Jul 22, 2019 |
| 4 | Insider transaction | Jul 24, 2019 | Jul 22, 2019 |
| 4 | Insider transaction | Jul 24, 2019 | Jul 22, 2019 |
| 4 | Insider transaction | Jul 24, 2019 | Jul 22, 2019 |
| 4 | Insider transaction | Jul 24, 2019 | Jul 22, 2019 |
| 4 | Insider transaction | Jul 24, 2019 | Jul 22, 2019 |
| 4 | Insider transaction | Jul 24, 2019 | Jul 22, 2019 |
| 4 | Insider transaction | Jun 11, 2019 | Jun 7, 2019 |
| 4 | Insider transaction | Jun 11, 2019 | Jun 7, 2019 |
| 4 | Insider transaction | May 14, 2019 | May 10, 2019 |
| 4/A | Ownership document | Mar 29, 2019 | Mar 4, 2019 |
| 4 | Insider transaction | Mar 6, 2019 | Mar 4, 2019 |
| 4 | Insider transaction | Mar 6, 2019 | Mar 4, 2019 |
| 4 | Insider transaction | Mar 6, 2019 | Mar 4, 2019 |
| 4 | Insider transaction | Mar 6, 2019 | Mar 4, 2019 |
| 5 | Annual insider ownership | Feb 14, 2019 | Dec 31, 2018 |
| SC 13G | Ownership over 5% (passive) | Feb 8, 2019 | — |
| 4 | Insider transaction | Dec 11, 2018 | Dec 7, 2018 |
| 4 | Insider transaction | Sep 7, 2018 | Sep 5, 2018 |
| 4 | Insider transaction | Aug 31, 2018 | Aug 30, 2018 |
| 4 | Insider transaction | Aug 31, 2018 | Aug 29, 2018 |
| 4 | Insider transaction | Aug 30, 2018 | Aug 28, 2018 |
| 4 | Insider transaction | Aug 30, 2018 | Aug 28, 2018 |
| 4 | Insider transaction | Aug 7, 2018 | Aug 3, 2018 |
| 4 | Insider transaction | Aug 6, 2018 | Aug 2, 2018 |
| 4 | Insider transaction | Jun 18, 2018 | Jun 14, 2018 |
| 4 | Insider transaction | Jun 14, 2018 | Jun 11, 2018 |
| 4 | Insider transaction | May 18, 2018 | May 17, 2018 |
| 4 | Insider transaction | May 18, 2018 | May 16, 2018 |
| 4 | Insider transaction | May 17, 2018 | May 15, 2018 |
| 4 | Insider transaction | May 16, 2018 | May 16, 2018 |
| 4 | Insider transaction | May 16, 2018 | May 15, 2018 |
| 4 | Insider transaction | May 16, 2018 | May 14, 2018 |
| 4 | Insider transaction | Apr 27, 2018 | Mar 15, 2018 |
| 4 | Insider transaction | Apr 27, 2018 | Mar 15, 2018 |
| 4 | Insider transaction | Apr 27, 2018 | Mar 15, 2018 |
| 4 | Insider transaction | Apr 27, 2018 | Mar 15, 2018 |
| 4 | Insider transaction | Apr 18, 2018 | Apr 17, 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.
New to this? Read What Are SEC Filings? 10-K, 10-Q, 8-K and Other Forms Explained.
Company profile
- Industry
- Surgical & Medical Instruments & Apparatus (SIC 3841)
- Listed as
- CTSO (Nasdaq)
- Fiscal year ends
- December 31
- Incorporated in
- DE
- Headquarters
- Princeton, NJ
- SEC filer status
- Non-accelerated filer, Smaller reporting company
- SEC CIK
- 1175151
- Former names
- MedaSorb Technologies CORP (until Apr 15, 2010); GILDER ENTERPRISES INC (until Jul 24, 2006)
Other Surgical & Medical Instruments & Apparatus companies
- Stryker Corp SYK
- 3M Co MMM
- Boston Scientific Corp BSX
- Becton Dickinson & Co BDX
- Medline Inc. MDLN
- Resmed Inc RMD
- Dexcom Inc DXCM
- Fresenius SE & Co. KGaA FSNUY
All 151 Surgical & Medical Instruments & Apparatus companies
Source: SEC EDGAR filings. This is company-reported data, not investment advice.