---
schema_version: "secwatch.filing_event.v1"
accession: "0001641172-25-021387"
form_type: "8-K"
ticker: "NIMU"
cik: "0000720762"
company_name: "NON INVASIVE MONITORING SYSTEMS INC /FL/"
filed_at: "2025-07-29T23:59:59+00:00"
generated_at: "2026-05-17T23:52:32.998883+00:00"
event_type: "debt"
sentiment: "neutral"
materiality_score: 0.55
calibrated_materiality_score: 0.55
confidence: "high"
source: SEC EDGAR
---

# NIMS extends maturity on $595K in related-party notes from July 31 to Dec 31, 2025

## Summary
- Extended maturities on eight promissory notes with Frost Gamma Investments Trust (controlled by Dr. Phillip Frost) and Dr. Jane Hsiao.
- Principal amounts: 2021 ($75K each), 2022 ($75K each), 2023 ($200K), Sept 2024 ($25K), Oct 2024 ($30K), Jan 2025 ($40K); no other terms changed.
- Notes originally due July 31, 2025 now due December 31, 2025; indicates potential near-term liquidity need.
- Dr. Phillip Frost and Dr. Jane Hsiao are directors and >10% beneficial owners; transactions are related-party.

## SEC filing metadata
- accession: 0001641172-25-021387
- form_type: 8-K
- ticker: NIMU
- cik: 0000720762
- company_name: NON INVASIVE MONITORING SYSTEMS INC /FL/
- filed_at: 2025-07-29T23:59:59+00:00
- event_type: debt
- sentiment: neutral
- materiality_score: 0.55
- calibrated_materiality_score: 0.55
- confidence: high
- sec_items: 1.01, 2.03, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/720762/000164117225021387/0001641172-25-021387-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/720762/000164117225021387/form8-k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001641172-25-021387
- JSON: https://secwatch.observer/filing/0001641172-25-021387.json
- Plain text: https://secwatch.observer/filing/0001641172-25-021387.txt

## Key facts
- Debt Financings
  NON INVASIVE MONITORING SYSTEMS INC /FL/ amended loan of $75,000.00 with Frost Gamma Investments Trust maturing December 31, 2025.
  - Instrument: loan
  - Principal: $75,000.00
  - Counterparty: Frost Gamma Investments Trust
  - Maturity: December 31, 2025
  - Event: amendment
  source text: 25, 2025, Non-Invasive Monitoring Systems, Inc. (“NIMS”) entered into the Second Amendment to that certain Promissory Note dated October 4, 2021 in the principal amount of $75,000.00 with Frost Gamma Investments Trust (the “2021 Frost Gamma Note”), a trust controlled by Dr. Phillip Frost, a current director, which beneficially owns in excess of 10% of our
  evidence_url: https://www.sec.gov/Archives/edgar/data/720762/000164117225021387/0001641172-25-021387-index.htm
- Debt Financings
  NON INVASIVE MONITORING SYSTEMS INC /FL/ amended loan of $75,000.00 with Dr. Jane Hsiao maturing December 31, 2025.
  - Instrument: loan
  - Principal: $75,000.00
  - Counterparty: Dr. Jane Hsiao
  - Maturity: December 31, 2025
  - Event: amendment
  source text: 25, 2025, Non-Invasive Monitoring Systems, Inc. (“NIMS”) entered into the Second Amendment to that certain Promissory Note dated October 4, 2021 in the principal amount of $75,000.00 with Frost Gamma Investments Trust (the “2021 Frost Gamma Note”), a trust controlled by Dr. Phillip Frost, a current director, which beneficially owns in excess of 10% of our
  evidence_url: https://www.sec.gov/Archives/edgar/data/720762/000164117225021387/0001641172-25-021387-index.htm
- Debt Financings
  NON INVASIVE MONITORING SYSTEMS INC /FL/ amended loan of $200,000.00 with Frost Gamma Investments Trust maturing December 31, 2025.
  - Instrument: loan
  - Principal: $200,000.00
  - Counterparty: Frost Gamma Investments Trust
  - Maturity: December 31, 2025
  - Event: amendment
  source text: Gamma Investments Trust Promissory Note On July 25, 2025, NIMS entered into the First Amendment to that certain Promissory Note dated August 15, 2023 in the principal amount of $200,000.00 with Frost Gamma Investments Trust (the “2023 Frost Gamma Note”), a trust controlled by Dr. Phillip Frost, a current director, which beneficially owns in excess of 10% of our
  evidence_url: https://www.sec.gov/Archives/edgar/data/720762/000164117225021387/0001641172-25-021387-index.htm

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