---
schema_version: "secwatch.filing_event.v1"
accession: "0001493152-23-029168"
form_type: "8-K"
ticker: "NIMU"
cik: "0000720762"
company_name: "NON INVASIVE MONITORING SYSTEMS INC /FL/"
filed_at: "2023-08-16T23:59:59+00:00"
generated_at: "2026-06-11T08:56:48.342291+00:00"
event_type: "debt"
sentiment: "neutral"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "high"
source: SEC EDGAR
---

# NIMS enters into $200K promissory note with related party and extends maturities on $300K in existing notes

## Summary
- New $200,000 promissory note issued to Frost Gamma Investments Trust (Dr. Phillip Frost) at 11% interest, due July 31, 2025.
- Maturity dates on four existing notes (total $300,000) extended from October 4, 2023 to July 31, 2025; no other changes.
- Related parties: Frost Gamma (beneficial owner >10%) and Chairman/Interim CEO Jane Hsiao for new note and amendments.
- Prepayment allowed without penalty; proceeds likely for working capital (not explicitly stated).

## SEC filing metadata
- accession: 0001493152-23-029168
- form_type: 8-K
- ticker: NIMU
- cik: 0000720762
- company_name: NON INVASIVE MONITORING SYSTEMS INC /FL/
- filed_at: 2023-08-16T23:59:59+00:00
- event_type: debt
- sentiment: neutral
- materiality_score: 0.6
- calibrated_materiality_score: 0.6
- confidence: high
- sec_items: 1.01, 2.03, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/720762/000149315223029168/0001493152-23-029168-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/720762/000149315223029168/form8-k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001493152-23-029168
- JSON: https://secwatch.observer/filing/0001493152-23-029168.json
- Plain text: https://secwatch.observer/filing/0001493152-23-029168.txt

## Key facts
- Debt Financings
  NON INVASIVE MONITORING SYSTEMS INC /FL/ amended loan of $75,000 with Jane Hsiao, Ph.D. maturing July 31, 2025.
  - Instrument: loan
  - Principal: $75,000
  - Counterparty: Jane Hsiao, Ph.D.
  - Maturity: July 31, 2025
  - Event: amendment
  source text: On August 15, 2023, NIMS entered into the First Amendment to that certain Promissory Note dated October 4, 2021 in the principal amount of $75,000 with Jane Hsiao, Ph.D., the Company’s Chairman and Interim CEO
  evidence_url: https://www.sec.gov/Archives/edgar/data/720762/000149315223029168/0001493152-23-029168-index.htm
- Debt Financings
  NON INVASIVE MONITORING SYSTEMS INC /FL/ amended loan of $75,000 with Jane Hsiao, Ph.D. maturing July 31, 2025.
  - Instrument: loan
  - Principal: $75,000
  - Counterparty: Jane Hsiao, Ph.D.
  - Maturity: July 31, 2025
  - Event: amendment
  source text: On August 15, 2023, NIMS entered into the First Amendment to that certain Promissory Note dated September 16, 2022 in the principal amount of $75,000 with Jane Hsiao, Ph.D., the Company’s Chairman and Interim CEO
  evidence_url: https://www.sec.gov/Archives/edgar/data/720762/000149315223029168/0001493152-23-029168-index.htm
- Debt Financings
  NON INVASIVE MONITORING SYSTEMS INC /FL/ incurred loan of $200,000.00 with Frost Gamma Investments Trust at 11% per annum maturing July 31, 2025.
  - Instrument: loan
  - Principal: $200,000.00
  - Counterparty: Frost Gamma Investments Trust
  - Rate: 11% per annum
  - Maturity: July 31, 2025
  - Event: incurrence
  source text: On August 15, 2023, Non-Invasive Monitoring Systems, Inc. (“NIMS”) entered into a Promissory Note in the principal amount of $200,000.00 with Frost Gamma Investments Trust
  evidence_url: https://www.sec.gov/Archives/edgar/data/720762/000149315223029168/0001493152-23-029168-index.htm
- Debt Financings
  NON INVASIVE MONITORING SYSTEMS INC /FL/ amended loan of $75,000 with Frost Gamma Investments Trust maturing July 31, 2025.
  - Instrument: loan
  - Principal: $75,000
  - Counterparty: Frost Gamma Investments Trust
  - Maturity: July 31, 2025
  - Event: amendment
  source text: On August 15, 2023, NIMS entered into the First Amendment to that certain Promissory Note dated October 4, 2021 in the principal amount of $75,000 with Frost Gamma Investments Trust
  evidence_url: https://www.sec.gov/Archives/edgar/data/720762/000149315223029168/0001493152-23-029168-index.htm
- Debt Financings
  NON INVASIVE MONITORING SYSTEMS INC /FL/ amended loan of $75,000 with Frost Gamma Investments Trust maturing July 31, 2025.
  - Instrument: loan
  - Principal: $75,000
  - Counterparty: Frost Gamma Investments Trust
  - Maturity: July 31, 2025
  - Event: amendment
  source text: On August 15, 2023, NIMS entered into the First Amendment to that certain Promissory Note dated September 16, 2022 in the principal amount of $75,000 with Frost Gamma Investments Trust
  evidence_url: https://www.sec.gov/Archives/edgar/data/720762/000149315223029168/0001493152-23-029168-index.htm

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