---
schema_version: "secwatch.filing_event.v1"
accession: "0001493152-25-008462"
form_type: "8-K"
ticker: "SHPH"
cik: "0001757499"
company_name: "Shuttle Pharmaceuticals Holdings, Inc."
filed_at: "2025-02-27T23:59:59+00:00"
generated_at: "2026-05-26T02:21:36.399336+00:00"
event_type: "other_material"
sentiment: "positive"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "high"
source: SEC EDGAR
---

# Shuttle pays $75K to permanently waive Alto's right to $10M additional notes, warrants

## Summary
- Paid $75,000 to Alto Opportunity Master Fund for permanent waiver of right to purchase up to $10M in additional notes and warrants.
- Also granted one-time waiver of participation rights in Company's S-1 registered offering (filed Feb 13, 2025) if closed by March 31, 2025.
- The $4.3M convertible note held by Alto is noted as satisfied in full.
- Company and guarantors release Alto from all claims related to transaction documents.

## SEC filing metadata
- accession: 0001493152-25-008462
- form_type: 8-K
- ticker: SHPH
- cik: 0001757499
- company_name: Shuttle Pharmaceuticals Holdings, Inc.
- filed_at: 2025-02-27T23:59:59+00:00
- event_type: other_material
- sentiment: positive
- materiality_score: 0.6
- calibrated_materiality_score: 0.6
- confidence: high
- sec_items: 1.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1757499/000149315225008462/0001493152-25-008462-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1757499/000149315225008462/form8-k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001493152-25-008462
- JSON: https://secwatch.observer/filing/0001493152-25-008462.json
- Plain text: https://secwatch.observer/filing/0001493152-25-008462.txt

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