---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-25-104427"
form_type: "8-K"
ticker: "NWBO"
cik: "0001072379"
company_name: "NORTHWEST BIOTHERAPEUTICS INC"
filed_at: "2025-10-30T23:59:59+00:00"
generated_at: "2026-05-17T01:13:40.951718+00:00"
event_type: "m_and_a"
sentiment: "positive"
materiality_score: 0.55
calibrated_materiality_score: 0.55
confidence: "high"
source: SEC EDGAR
---

# NWBO closes Advent BioServices acquisition; pays £1.4M + AP over 2 years; 19M securities revert

## Summary
- Acquisition of Advent BioServices closed; Advent becomes wholly owned subsidiary.
- No new shares issued; 13.5M shares and 5.5M options previously issued to Advent revert to NWBO.
- Consideration: £1.4 million plus net accounts payable, paid in installments over two years starting 90 days post-closing.
- Installment payments may accelerate upon regulatory approval of DCVax-L; NWBO receives fixed assets, cryostorage, and IP.

## SEC filing metadata
- accession: 0001104659-25-104427
- form_type: 8-K
- ticker: NWBO
- cik: 0001072379
- company_name: NORTHWEST BIOTHERAPEUTICS INC
- filed_at: 2025-10-30T23:59:59+00:00
- event_type: m_and_a
- sentiment: positive
- materiality_score: 0.55
- calibrated_materiality_score: 0.55
- confidence: high
- sec_items: 1.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1072379/000110465925104427/0001104659-25-104427-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1072379/000110465925104427/tm2529815d1_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-25-104427
- JSON: https://secwatch.observer/filing/0001104659-25-104427.json
- Plain text: https://secwatch.observer/filing/0001104659-25-104427.txt

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