---
schema_version: "secwatch.filing_event.v1"
accession: "0001437749-25-038276"
form_type: "8-K"
ticker: "ICU"
cik: "0001831868"
company_name: "SeaStar Medical Holding Corp"
filed_at: "2025-12-18T23:59:59+00:00"
generated_at: "2026-05-16T12:46:40.803931+00:00"
event_type: "other_material"
sentiment: "negative"
materiality_score: 0.75
calibrated_materiality_score: 0.75
confidence: "high"
source: SEC EDGAR
---

# SeaStar Medical shareholders approve 1-for-10 reverse stock split effective Jan 2, 2026

## Summary
- Reverse split approved with 16.5M for, 5.6M against; authorized shares cut by 25M to 425M.
- Split effective 12:01 AM ET Jan 2, 2026; post-split shares outstanding ~3.8M.
- No fractional shares; round-up to next whole number. Warrants/options proportionally adjusted.
- Symbol 'ICU' unchanged; trading on Nasdaq begins split-adjusted Jan 2.

## SEC filing metadata
- accession: 0001437749-25-038276
- form_type: 8-K
- ticker: ICU
- cik: 0001831868
- company_name: SeaStar Medical Holding Corp
- filed_at: 2025-12-18T23:59:59+00:00
- event_type: other_material
- sentiment: negative
- materiality_score: 0.75
- calibrated_materiality_score: 0.75
- confidence: high
- sec_items: 3.03, 5.07
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1831868/000143774925038276/0001437749-25-038276-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1831868/000143774925038276/icu20251217_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001437749-25-038276
- JSON: https://secwatch.observer/filing/0001437749-25-038276.json
- Plain text: https://secwatch.observer/filing/0001437749-25-038276.txt

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