Heather Kiessling net worth and biography

Heather Kiessling Biography and Net Worth

CFO of ASP Isotopes

Prior to joining ASP Isotopes, Heather served as Managing Director at Danforth Advisors LLC, a life science consulting firm. Prior to joining Danforth Advisors, Heather held finance leadership roles at Cytonome/ST, LLC and AutoImmune Inc. and started her career as an auditor at Price Waterhouse. Heather is a CPA and holds a BA from University of California, San Diego, and an MBA from University of Michigan Graduate School of Business.

What is Heather Kiessling's net worth?: The estimated net worth of Heather Kiessling is at least $4.29 million as of December 18th, 2025. Ms. Kiessling owns 732,500 shares of ASP Isotopes stock worth more than $4,285,125 as of March 13th. This net worth evaluation does not reflect any other assets that Ms. Kiessling may own. Learn More about Heather Kiessling's net worth.
How do I contact Heather Kiessling?: The corporate mailing address for Ms. Kiessling and other ASP Isotopes executives is , , . ASP Isotopes can also be reached via phone at 561-709-3034 and via email at [email protected]. Learn More on Heather Kiessling's contact information.
Has Heather Kiessling been buying or selling shares of ASP Isotopes?: Heather Kiessling has not been actively trading shares of ASP Isotopes during the last quarter. Most recently, Heather Kiessling sold 80,000 shares of the business's stock in a transaction on Thursday, December 18th. The shares were sold at an average price of $5.80, for a transaction totalling $464,000.00. Following the completion of the sale, the chief financial officer now directly owns 732,500 shares of the company's stock, valued at $4,248,500. Learn More on Heather Kiessling's trading history.
Who are ASP Isotopes' active insiders?: ASP Isotopes' insider roster includes Robert Ainscow (COO), Heather Kiessling (CFO), Paul Mann (CEO), Duncan Moore (Director), John Ryan (Director), and Todd Wider (Director). Learn More on ASP Isotopes' active insiders.
Are insiders buying or selling shares of ASP Isotopes?: During the last year, insiders at the sold shares 19 times. They sold a total of 1,686,895 shares worth more than $11,356,626.43. The most recent insider tranaction occured on March, 6th when COO Robert Ainscow sold 8,438 shares worth more than $45,902.72. Insiders at ASP Isotopes own 14.4% of the company. Learn More about insider trades at ASP Isotopes.
Information on this page was last updated on 3/6/2026.

Heather Kiessling Insider Trading History at ASP Isotopes

Transaction Date	Buy/Sell	Number of Shares	Average Share Price	Total Transaction	Shares Held After Transaction	Details
12/18/2025	Sell	80,000	$5.80	$464,000.00	732,500

Heather Kiessling Buying and Selling Activity at ASP Isotopes

ASP Isotopes Company Overview

ASP Isotopes Inc., a development stage advanced materials company, focuses on the production, distribution, marketing, and sale of isotopes. It engages in the production and commercialization of Molybdenum-100, a non-radioactive isotope for the medical industry; Carbon-14; and Silicon-28. The company is also developing Quantum Enrichment technology to produce Ytterbium-176, Nickel-64, Lithium 6, Lithium7, and Uranium-235. ASP Isotopes Inc. was incorporated in 2021 and is headquartered in Washington, District Of Columbia.

Today's Range

Now: $5.85

$5.52

$6.15

50 Day Range

MA: $6.25

$5.11

$8.48

2 Week Range

Now: $5.85

$3.86

$14.49

Volume

8,680,439 shs

Average Volume

3,864,573 shs

Market Capitalization

$648.41 million

P/E Ratio

N/A

Dividend Yield

N/A

Beta

3.55