---
schema_version: "secwatch.filing_event.v1"
accession: "0001213900-26-005260"
form_type: "8-K"
ticker: null
cik: "0001845459"
company_name: "NKGen Biotech, Inc."
filed_at: "2026-01-16T23:59:59+00:00"
generated_at: "2026-05-16T09:56:18.623335+00:00"
event_type: "debt"
sentiment: "neutral"
materiality_score: 0.4
calibrated_materiality_score: 0.4
confidence: "high"
source: SEC EDGAR
---

# NKGen Biotech adds $295K to AlpineBrook secured note, principal now $26.1M

## Summary
- Amendment to secured promissory note increases principal by $295,000 to $26,135,106.
- Interest on original $25,840,106 accrues from Jan 5, 2026; on additional $295,000 from Jan 12, 2026.
- Lender is AlpineBrook Capital GP I Limited; borrows are NKGen Biotech and NKGen Operating Biotech.
- All other terms of the January 5, 2026 note remain unchanged.

## SEC filing metadata
- accession: 0001213900-26-005260
- form_type: 8-K
- cik: 0001845459
- company_name: NKGen Biotech, Inc.
- filed_at: 2026-01-16T23:59:59+00:00
- event_type: debt
- sentiment: neutral
- materiality_score: 0.4
- calibrated_materiality_score: 0.4
- confidence: high
- sec_items: 1.01, 2.03, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1845459/000121390026005260/0001213900-26-005260-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1845459/000121390026005260/ea0272566-8k_nkgen.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001213900-26-005260
- JSON: https://secwatch.observer/filing/0001213900-26-005260.json
- Plain text: https://secwatch.observer/filing/0001213900-26-005260.txt

## Key facts
- Material Agreements
  NKGen Biotech, Inc. amended Amendment with AlpineBrook Capital GP I Limited valued at $295,000 (effective 2026-01-12).
  - Action: amendment
  - Agreement: credit facility
  - Counterparty: AlpineBrook Capital GP I Limited
  - Value: $295,000
  - Effective: 2026-01-12
  source text: On January 12, 2026, NKGen Biotech, Inc., a Delaware corporation (the “ Company ”), and NKGen Operating Biotech, Inc., a Delaware corporation (together with the Company, the “ Borrowers ”), entered into an amendment (the “ Amendment ”) to that certain secured promissory note with AlpineBrook Capital GP I Limited (the “ Lender ”), dated January 5, 2026 (the “ Note ”).
  evidence_url: https://www.sec.gov/Archives/edgar/data/1845459/000121390026005260/0001213900-26-005260-index.htm

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