---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-26-105901"
form_type: "8-K"
ticker: "CTSO"
cik: "0001175151"
company_name: "Cytosorbents Corp"
filed_at: "2026-09-08T20:05:26+00:00"
generated_at: "2026-09-08T20:06:44.988054+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.5
calibrated_materiality_score: 0.5
confidence: "high"
source: SEC EDGAR
---

# CytoSorbents completes 1-for-20 reverse stock split effective Sept 8, 2026

## Summary
- Reverse split effective 12:01 a.m. ET Sept 8, 2026; approved by shareholders at Aug 13, 2026 annual meeting.
- Pre-split shares outstanding: 63,022,020; every 20 shares reclassified to 1 share, par value unchanged.
- No fractional shares; fractional entitlements rounded up to nearest whole share; Equiniti Trust is exchange agent.
- Outstanding options and warrants proportionally adjusted with corresponding exercise price changes.
- New CUSIP 23283X305; trading on Nasdaq continues on split-adjusted basis from Sept 8, 2026.

## SEC filing metadata
- accession: 0001104659-26-105901
- form_type: 8-K
- ticker: CTSO
- cik: 0001175151
- company_name: Cytosorbents Corp
- filed_at: 2026-09-08T20:05:26+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.5
- calibrated_materiality_score: 0.5
- confidence: high
- sec_items: 5.03, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1175151/000110465926105901/0001104659-26-105901-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1175151/000110465926105901/tm2624941d1_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-26-105901
- JSON: https://secwatch.observer/filing/0001104659-26-105901.json
- Plain text: https://secwatch.observer/filing/0001104659-26-105901.txt

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.