---
schema_version: "secwatch.filing_event.v1"
accession: "0001493152-26-015365"
form_type: "8-K"
ticker: "PTIX"
cik: "0001022899"
company_name: "Protagenic Therapeutics, Inc.new"
filed_at: "2026-04-07T23:59:59+00:00"
generated_at: "2026-05-15T06:58:22.591758+00:00"
event_type: "leadership"
sentiment: "negative"
materiality_score: 0.55
calibrated_materiality_score: 0.55
confidence: "high"
source: SEC EDGAR
---

# Protagenic Therapeutics terminates CFO Alexander Arrow, effective April 30, 2026

## Summary
- CFO Alexander Arrow notified on March 31, 2026 that employment will be terminated.
- Termination effective April 30, 2026; no successor or interim CFO announced.
- Company common stock (PTIX) and warrants (PTIXW) trade on OTC Markets.

## SEC filing metadata
- accession: 0001493152-26-015365
- form_type: 8-K
- ticker: PTIX
- cik: 0001022899
- company_name: Protagenic Therapeutics, Inc.new
- filed_at: 2026-04-07T23:59:59+00:00
- event_type: leadership
- sentiment: negative
- materiality_score: 0.55
- calibrated_materiality_score: 0.55
- confidence: high
- sec_items: 5.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1022899/000149315226015365/0001493152-26-015365-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1022899/000149315226015365/form8-k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001493152-26-015365
- JSON: https://secwatch.observer/filing/0001493152-26-015365.json
- Plain text: https://secwatch.observer/filing/0001493152-26-015365.txt

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