Who founded ASP Isotopes?

ASP Isotopes was founded by Paul Mann in 2021.

How much funding has ASP Isotopes raised?

ASP Isotopes has disclosed $114.2M raised across 2 rounds.

Where is ASP Isotopes headquartered?

ASP Isotopes is headquartered in Dallas, US.

ASP Isotopes

NASDAQ: ASPI

Dallas, US · Founded 2021 · Delaware corporation

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ASP (ASP Isotopes) is an advanced materials company developing proprietary technology and processes to produce and enrich isotopes for markets including nuclear medicine and therapeutics, green energy generation, and quantum computing. Its initial focus is constructing plants in South Africa to produce highly enriched isotopes for the nuclear medicine market.

Deep Tech Energy Medical Devices New Materials Semiconductors

Founders & leadership

ASP Isotopes was founded in 2021 by Paul Mann.

Paul MannFounder, Executive Chairman and Chief Executive Officer

Heather KiesslingChief Financial OfficerHeather Kiessling is an executive officer at ASP Isotopes, an advanced materials company focused on isotope production and enrichment. She has held operational and finance leadership roles across medical equipment and pharmaceutical companies, with expertise in financial planning, manufacturing operations, and cross-functional team management.

Robert AinscowExecutive

Donald AinscowEVP, General Counsel and Secretary

Hendrik StrydomExecutiveHendrik Strydom holds a PhD in Physics from the University of Natal and has spent over three decades in isotope separation and advanced materials research, including roles at South Africa's CSIR and Atomic Energy Corporation where he led the development of molecular laser isotope separation (MLIS) technology for uranium enrichment, and subsequently co-founded Klydon to advance enrichment and gas separation technologies.

Sergey VasnetsovNamed on SEC filing

Joshua DonfeldNamed on SEC filing

Board

Michael GorleyBoard director

Ralph L. Hunter, Jr.Board director

Sipho N. MasekoBoard director

Duncan MooreBoard director

Robert RyanBoard director

Reported raises · per SEC filings

Form D private placements

$114.2M disclosed across 2 rounds · 2023–2026

▶$109.2MraisedJul 2026 · 11 investors · Other

Rule 506(b)

Officers, directors & promoters on the filing

Paul E. MannExecutive Officer, Director
Michael GorleyDirector
Ralph L. Hunter, Jr.Director
Sipho N. MasekoDirector
Duncan MooreDirector
Robert RyanDirector
Todd WiderDirector
Heather KiesslingExecutive Officer
Robert AinscowExecutive Officer
Donald AinscowExecutive Officer

Offering amount: $109.2M
Amount sold: $109.2M
First sale: Jul 2026
Incorporated: Corporation, Delaware, 2021
Federal exemptions: 06b

Full filing on SEC EDGAR ↗

▶$5MraisedMar 2023 · 1 investors · Other

Rule 506(b)

Officers, directors & promoters on the filing

Robert AinscowExecutive Officer
Sergey VasnetsovDirector
Todd WiderDirector
Hendrik StrydomDirector
Joshua DonfeldDirector
Duncan MooreDirector
Paul E MannExecutive Officer, Director

Offering amount: $5M
Amount sold: $5M
Minimum investment: $5M
Sales commissions: $400K
Proceeds to insiders: $4.5M
Placement agents: H.C. Wainwright & Co., LLC
First sale: Mar 2023
Incorporated: Corporation, Delaware, 2021
Federal exemptions: 06b

Full filing on SEC EDGAR ↗

Source: SEC EDGAR Form D. Amounts as filed; amended filings shown once at their latest values.

Valuation · disclosed

Disclosed events

$125.4Mvaluation at IPONov 2022 · $4.00/share · 424B4

filing ↗

Source: SEC prospectus filings, and round valuations the company or its investors disclosed — follow each entry's link for the claim.

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In the news

ASP Isotopes (NASDAQ: ASPI) plans investor meetings, details merger-related filingsstocktitan.net · Aug 2026

Frequently asked questions

What does ASP Isotopes do?: ASP (ASP Isotopes) is an advanced materials company developing proprietary technology and processes to produce and enrich isotopes for markets including nuclear medicine and therapeutics, green energy generation, and quantum computing. Its initial focus is constructing plants in South Africa to produce highly enriched isotopes for the nuclear medicine market.
Who founded ASP Isotopes?: ASP Isotopes was founded by Paul Mann in 2021.
How much funding has ASP Isotopes raised?: ASP Isotopes has disclosed $114.2M raised across 2 rounds.
Where is ASP Isotopes headquartered?: ASP Isotopes is headquartered in Dallas, US.