---
schema_version: "secwatch.filing_event.v1"
accession: "0001140361-26-016424"
form_type: "8-K"
ticker: "ANGO"
cik: "0001275187"
company_name: "ANGIODYNAMICS INC"
filed_at: "2026-04-23T23:59:59+00:00"
generated_at: "2026-05-15T04:27:10.598691+00:00"
event_type: "litigation"
sentiment: "neutral"
materiality_score: 0.3
calibrated_materiality_score: 0.3
confidence: "high"
source: SEC EDGAR
---

# AngioDynamics files patent infringement suit against Endovascular Engineering over Hēlo Thrombectomy System

## Summary
- Filed patent infringement lawsuit against Endovascular Engineering on April 23, 2026 in Delaware District Court.
- Alleges E2's Hēlo Thrombectomy System infringes patents on self-expanding funnel technology for thrombus removal.
- Complaint seeks damages and equitable relief for unauthorized use of AngioDynamics' protected features.
- AngioDynamics states vigorous IP protection supports continued innovation and improved patient care.

## SEC filing metadata
- accession: 0001140361-26-016424
- form_type: 8-K
- ticker: ANGO
- cik: 0001275187
- company_name: ANGIODYNAMICS INC
- filed_at: 2026-04-23T23:59:59+00:00
- event_type: litigation
- sentiment: neutral
- materiality_score: 0.3
- calibrated_materiality_score: 0.3
- confidence: high
- sec_items: 8.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1275187/000114036126016424/0001140361-26-016424-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1275187/000114036126016424/ef20071331_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001140361-26-016424
- JSON: https://secwatch.observer/filing/0001140361-26-016424.json
- Plain text: https://secwatch.observer/filing/0001140361-26-016424.txt

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