---
schema_version: "secwatch.filing_event.v1"
accession: "0001477932-25-007115"
form_type: "8-K"
ticker: "ASPI"
cik: "0001921865"
company_name: "ASP Isotopes Inc."
filed_at: "2025-09-29T23:59:59+00:00"
generated_at: "2026-05-17T05:27:23.261429+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.7
calibrated_materiality_score: 0.7
confidence: "high"
source: SEC EDGAR
---

# CEO Paul Mann steps down to Executive Chairman on health leave; COO Ainscow named Interim CEO

## Summary
- Paul Mann becomes Executive Chairman, taking temporary leave from CEO duties for health reasons (orthopedic surgery recovery may take several months).
- Robert Ainscow, COO and co-founder, appointed Interim CEO effective Oct 1, 2025, while remaining COO.
- Michael Cunniffe appointed CFO of subsidiary Quantum Leap Energy LLC, effective Oct 1; Heather Kiessling remains ASP Isotopes CFO.
- Company plans investor tour in South Africa Nov 12-13, 2025, and first quarterly business update webinar in Nov 2025.

## SEC filing metadata
- accession: 0001477932-25-007115
- form_type: 8-K
- ticker: ASPI
- cik: 0001921865
- company_name: ASP Isotopes Inc.
- filed_at: 2025-09-29T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.7
- calibrated_materiality_score: 0.7
- confidence: high
- sec_items: 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1921865/000147793225007115/0001477932-25-007115-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1921865/000147793225007115/aspi_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001477932-25-007115
- JSON: https://secwatch.observer/filing/0001477932-25-007115.json
- Plain text: https://secwatch.observer/filing/0001477932-25-007115.txt

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