---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-25-114627"
form_type: "8-K"
ticker: "NWBO"
cik: "0001072379"
company_name: "NORTHWEST BIOTHERAPEUTICS INC"
filed_at: "2025-11-20T23:59:59+00:00"
generated_at: "2026-05-16T17:52:09.503638+00:00"
event_type: "debt"
sentiment: "neutral"
materiality_score: 0.7
calibrated_materiality_score: 0.7
confidence: "high"
source: SEC EDGAR
---

# NWBO enters $5M convertible note with Yorkville for Sawston facility

## Summary
- Promissory note of $5M with YA II PN, Ltd. (Yorkville) for 12 months, no payments due until maturity.
- Note carries 5% original issue discount, no interest, and convertible at a small discount to market price.
- Monthly conversion limited to ~1/5 of note amount unless conversion price above $0.29.
- Proceeds to fund construction/equipment for first Grade C manufacturing suite at Sawston, UK, plus operations.

## SEC filing metadata
- accession: 0001104659-25-114627
- form_type: 8-K
- ticker: NWBO
- cik: 0001072379
- company_name: NORTHWEST BIOTHERAPEUTICS INC
- filed_at: 2025-11-20T23:59:59+00:00
- event_type: debt
- sentiment: neutral
- materiality_score: 0.7
- calibrated_materiality_score: 0.7
- confidence: high
- sec_items: 1.01, 2.03
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1072379/000110465925114627/0001104659-25-114627-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1072379/000110465925114627/tm2531842d1_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-25-114627
- JSON: https://secwatch.observer/filing/0001104659-25-114627.json
- Plain text: https://secwatch.observer/filing/0001104659-25-114627.txt

## Key facts
- Debt Financings
  NORTHWEST BIOTHERAPEUTICS INC incurred convertible notes of $5 million with YA II PN, Ltd. at no interest maturing 12 months.
  - Instrument: convertible notes
  - Principal: $5 million
  - Counterparty: YA II PN, Ltd.
  - Rate: no interest
  - Maturity: 12 months
  - Event: incurrence
  source text: On November 14, 2025 the Company entered into a $5 million convertible Promissory Note financing (the “Note”) with YA II PN, Ltd., an investment fund managed by Yorkville Advisors Global, LP (“Yorkville”).
  evidence_url: https://www.sec.gov/Archives/edgar/data/1072379/000110465925114627/0001104659-25-114627-index.htm

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