---
schema_version: "secwatch.filing_event.v1"
accession: "0001641172-25-008455"
form_type: "8-K"
ticker: "PTIX"
cik: "0001022899"
company_name: "Protagenic Therapeutics, Inc.new"
filed_at: "2025-05-05T23:59:59+00:00"
generated_at: "2026-05-22T16:11:27.303133+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.5
calibrated_materiality_score: 0.5
confidence: "high"
source: SEC EDGAR
---

# Protagenic Therapeutics effects 1-for-14 reverse stock split to meet Nasdaq bid price rule

## Summary
- Reverse stock split at 1-for-14 ratio effective 12:01 a.m. ET on May 5, 2025.
- Approved by stockholders at April 18, 2025 special meeting; board set ratio to comply with Nasdaq Rule 5550(a)(2).
- Common stock trades on Nasdaq under symbol PTIX with new CUSIP 74365N301; warrants continue under PTIXW.
- Fractional shares rounded up; proportionate adjustments to outstanding options, warrants, and RSUs.

## SEC filing metadata
- accession: 0001641172-25-008455
- form_type: 8-K
- ticker: PTIX
- cik: 0001022899
- company_name: Protagenic Therapeutics, Inc.new
- filed_at: 2025-05-05T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.5
- calibrated_materiality_score: 0.5
- confidence: high
- sec_items: 5.03, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1022899/000164117225008455/0001641172-25-008455-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1022899/000164117225008455/form8-k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001641172-25-008455
- JSON: https://secwatch.observer/filing/0001641172-25-008455.json
- Plain text: https://secwatch.observer/filing/0001641172-25-008455.txt

## Key facts
- Governance Changes
  Protagenic Therapeutics, Inc.new: Approved and filed a certificate of amendment to effect a 1-for-14 reverse stock split of common stock (effective 2025-05-05).
  - Change: charter amendment
  - Effective: 2025-05-05
  source text: On May 2, 2025, the Company filed with the Secretary of State of the State of Delaware a certificate of amendment to its third amended and restated certificate of incorporation (the “Certificate of Amendment”) to effect the Reverse Stock Split.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1022899/000164117225008455/0001641172-25-008455-index.htm

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