---
schema_version: "secwatch.filing_event.v1"
accession: "0001213900-26-012879"
form_type: "8-K"
ticker: null
cik: "0001845459"
company_name: "NKGen Biotech, Inc."
filed_at: "2026-02-05T23:59:59+00:00"
generated_at: "2026-05-16T04:32:36.058593+00:00"
event_type: "debt"
sentiment: "neutral"
materiality_score: 0.4
calibrated_materiality_score: 0.4
confidence: "high"
source: SEC EDGAR
---

# NKGen Biotech obtains additional $251K loan, secured note now $26.8M

## Summary
- Entered third amendment to secured promissory note with AlpineBrook Capital for additional $251,000 loan.
- Total principal amount of secured promissory note increased to $26,758,106.
- Interest on the new loan begins accruing from January 30, 2026, the funding date.
- Loan is part of a series of amendments; prior principal was $26,507,106 after second amendment.

## SEC filing metadata
- accession: 0001213900-26-012879
- form_type: 8-K
- cik: 0001845459
- company_name: NKGen Biotech, Inc.
- filed_at: 2026-02-05T23:59:59+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/1845459/000121390026012879/0001213900-26-012879-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1845459/000121390026012879/ea0275350-8k_nkgen.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001213900-26-012879
- JSON: https://secwatch.observer/filing/0001213900-26-012879.json
- Plain text: https://secwatch.observer/filing/0001213900-26-012879.txt

## Key facts
- Debt Financings
  NKGen Biotech, Inc. incurred loan of $251,000 with AlpineBrook Capital GP I Limited.
  - Instrument: loan
  - Principal: $251,000
  - Counterparty: AlpineBrook Capital GP I Limited
  - Event: incurrence
  source text: The Alpine Third Amendment provides an additional $251,000 of funding to the Borrowers (the "Fourth Additional New Loan").
  evidence_url: https://www.sec.gov/Archives/edgar/data/1845459/000121390026012879/0001213900-26-012879-index.htm
- Material Agreements
  NKGen Biotech, Inc. amended Alpine Third Amendment with AlpineBrook Capital GP I Limited valued at $251,000 (effective 2026-01-30).
  - Action: amendment
  - Agreement: credit facility
  - Counterparty: AlpineBrook Capital GP I Limited
  - Value: $251,000
  - Effective: 2026-01-30
  source text: On January 30, 2026, NKGen Biotech, Inc. (the “Company”) and NKGen Operating Biotech, Inc., a Delaware corporation (together with the Company, the “Borrowers”), entered into a third amendment (the “Alpine Third Amendment”) to that certain secured promissory note with AlpineBrook Capital GP I Limited, dated January 5, 2026
  evidence_url: https://www.sec.gov/Archives/edgar/data/1845459/000121390026012879/0001213900-26-012879-index.htm

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