---
schema_version: "secwatch.filing_event.v1"
accession: "0000929638-24-001521"
form_type: "8-K"
ticker: "ICU"
cik: "0001831868"
company_name: "SeaStar Medical Holding Corp"
filed_at: "2024-04-18T23:59:59+00:00"
generated_at: "2026-06-03T19:26:30.476354+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.4
calibrated_materiality_score: 0.4
confidence: "high"
source: SEC EDGAR
---

# SeaStar Medical lowers stockholder meeting quorum to 33 1/3%, removes 'Acting in Concert' definition

## Summary
- Quorum for stockholder meetings reduced from majority to 33 1/3% of outstanding common stock.
- Board removed 'Acting in Concert' definition and related provisions from Section 2.12(a) and (b).
- Second Amended and Restated Bylaws approved April 12, 2024, effective same date.
- Changes affect ability to block actions and proxy contest rules.

## SEC filing metadata
- accession: 0000929638-24-001521
- form_type: 8-K
- ticker: ICU
- cik: 0001831868
- company_name: SeaStar Medical Holding Corp
- filed_at: 2024-04-18T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.4
- calibrated_materiality_score: 0.4
- confidence: high
- sec_items: 5.03, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1831868/000092963824001521/0000929638-24-001521-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1831868/000092963824001521/a8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000929638-24-001521
- JSON: https://secwatch.observer/filing/0000929638-24-001521.json
- Plain text: https://secwatch.observer/filing/0000929638-24-001521.txt

## Key facts
- Governance Changes
  SeaStar Medical Holding Corp: Amended and restated bylaws to reduce stockholder quorum threshold from majority to 33 1/3% and remove 'Acting in Concert' provisions (effective 2024-04-12).
  - Change: bylaw amendment
  - Effective: 2024-04-12
  source text: On April 12, 2024, the Board of Directors (the “Board”) of SeaStar Medical Holding Corporation (the “Company”) approved the amendment and restatement of the Company’s Amended and Restated Bylaws (the “Second Amended and Restated Bylaws”) to, among other things: • reduce the quorum threshold for meetings of stockholders from the holders of a majority of the common stock of the Company issued and outstanding and entitled to vote to the holders of at least 33 1/3% of the common stock of the Company issued and outstanding and entitled to vote; and • remove the “Acting in Concert” definition and provisions
  evidence_url: https://www.sec.gov/Archives/edgar/data/1831868/000092963824001521/0000929638-24-001521-index.htm

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