---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-26-231040"
form_type: "8-K"
ticker: "CRDF"
cik: "0001213037"
company_name: "Cardiff Oncology, Inc."
filed_at: "2026-05-19T21:01:02+00:00"
generated_at: "2026-05-19T21:03:47.292933+00:00"
event_type: "litigation"
sentiment: "negative"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "high"
source: SEC EDGAR
---

# Cardiff Oncology sues Nerviano Medical Sciences over onvansertib license inventorship dispute

## Summary
- Filed suit in SD California for injunctive relief and declaratory judgment it did not breach license agreement for onvansertib.
- Dispute stems from NMS allegation that Cardiff failed to name an NMS employee as joint inventor on U.S. Patent Nos. 12,144,813 and 12,263,173.
- Cardiff maintains no breach occurred; agreement does not require naming NMS employees on inventions made solely by Cardiff.
- NMS sent written notice of alleged material breach on February 24, 2026, as previously disclosed.
- Judicial intervention sought after prior discussions failed to resolve the disagreement.

## SEC filing metadata
- accession: 0001193125-26-231040
- form_type: 8-K
- ticker: CRDF
- cik: 0001213037
- company_name: Cardiff Oncology, Inc.
- filed_at: 2026-05-19T21:01:02+00:00
- event_type: litigation
- sentiment: negative
- materiality_score: 0.6
- calibrated_materiality_score: 0.6
- confidence: high
- sec_items: 8.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1213037/000119312526231040/0001193125-26-231040-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1213037/000119312526231040/crdf-20260519.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-26-231040
- JSON: https://secwatch.observer/filing/0001193125-26-231040.json
- Plain text: https://secwatch.observer/filing/0001193125-26-231040.txt

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