---
schema_version: "secwatch.filing_event.v1"
accession: "0001683168-23-001546"
form_type: "8-K"
ticker: "ISCO"
cik: "0001355790"
company_name: "International Stem Cell CORP"
filed_at: "2023-03-16T23:59:59+00:00"
generated_at: "2026-06-18T00:18:41.919262+00:00"
event_type: "debt"
sentiment: "neutral"
materiality_score: 0.45
calibrated_materiality_score: 0.45
confidence: "high"
source: SEC EDGAR
---

# International Stem Cell extends $2.9M CEO loan maturity to September 2023

## Summary
- Principal $2.9M from CEO Andrey Semechkin; maturity extended from Mar 15 to Sep 15, 2023.
- Interest rate 4.5% per annum; note is unsecured, non-convertible, prepayable without penalty.
- Unpaid interest on original note approx. $451,000 as of March 15, 2023.
- Loan is a replacement for prior note issued Sept 15, 2022; no new proceeds.

## SEC filing metadata
- accession: 0001683168-23-001546
- form_type: 8-K
- ticker: ISCO
- cik: 0001355790
- company_name: International Stem Cell CORP
- filed_at: 2023-03-16T23:59:59+00:00
- event_type: debt
- sentiment: neutral
- materiality_score: 0.45
- calibrated_materiality_score: 0.45
- confidence: high
- sec_items: 1.01, 2.03, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1355790/000168316823001546/0001683168-23-001546-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1355790/000168316823001546/isco_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001683168-23-001546
- JSON: https://secwatch.observer/filing/0001683168-23-001546.json
- Plain text: https://secwatch.observer/filing/0001683168-23-001546.txt

## Key facts
- Debt Financings
  International Stem Cell CORP incurred loan of $2,900,000 with Dr. Andrey Semechkin at four and a half percent (4.5%) per annum maturing September 15, 2023.
  - Instrument: loan
  - Principal: $2,900,000
  - Counterparty: Dr. Andrey Semechkin
  - Rate: four and a half percent (4.5%) per annum
  - Maturity: September 15, 2023
  - Event: incurrence
  source text: extend (until September 15, 2023) the maturity date of the loan (in the principal amount of $2,900,000) from Dr. Semechkin to the Company that had been reflected in a promissory note dated September 15, 2022 (the “Original Note”), and which would have been due on March 15, 2023. In exchange for the Original Note, the Company issued to Dr. Semechkin an unsecured, non-convertible promissory note in the principal amount of $2,900,000 (the “Note”) with the extended maturity date.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1355790/000168316823001546/0001683168-23-001546-index.htm

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