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ASPI Insider Trading

Insider Ownership Percentage: 14.40%
Insider Buying (Last 12 Months): $0.00
Insider Selling (Last 12 Months): $11,356,626.43

ASP Isotopes Insider Trading History Chart

This chart shows the insider buying and selling history at ASP Isotopes by year and by quarter.

Skip ChartChart Data in Insider Trading History Table

ASP Isotopes Share Price & Price History

Current Price: $4.35
Price Change: ▼ Price Decrease of -0.264 (-5.73%)
As of 03/27/2026 02:52 PM ET

This chart shows the closing price history over time for ASPI up to the past year.

Skip Chart and Table DataPrice Data in Insider Trading History Table
Days: 30 | 90 | 365

ASP Isotopes Insider Trading History

Transaction DateInsider NameTitleBuy/SellNumber of SharesAverage Share PriceTotal TransactionShares Held After TransactionDetails
3/6/2026Robert AinscowCOOSell8,438$5.44$45,902.721,537,817View SEC Filing Icon  
12/18/2025Heather KiesslingCFOSell80,000$5.80$464,000.00732,500View SEC Filing Icon  
12/8/2025Robert AinscowCEOSell8,438$6.20$52,315.601,546,255View SEC Filing Icon  
12/1/2025Paul Elliot MannChairmanSell162,153$5.75$932,379.757,759,538View SEC Filing Icon  
11/25/2025Paul Elliot MannInsiderSell50,000$5.77$288,500.007,921,691View SEC Filing Icon  
11/25/2025Robert AinscowCEOSell25,000$5.77$144,250.001,554,693View SEC Filing Icon  
11/17/2025Paul Elliot MannInsiderSell112,500$7.51$844,875.007,971,691View SEC Filing Icon  
11/17/2025Robert AinscowCEOSell67,500$7.51$506,925.001,579,693View SEC Filing Icon  
10/14/2025Robert AinscowCEOSell22,500$13.60$306,000.001,647,193View SEC Filing Icon  
9/30/2025Michael GorleyDirectorSell64,000$9.75$624,000.0081,360View SEC Filing Icon  
9/15/2025Todd WiderDirectorSell74,108$8.76$649,186.08710,230View SEC Filing Icon  
9/9/2025Paul Elliot MannCEOSell81,077$8.39$680,236.038,084,191View SEC Filing Icon  
9/8/2025Paul Elliot MannCEOSell81,076$8.53$691,578.287,234,378View SEC Filing Icon  
9/8/2025Robert AinscowCOOSell8,438$8.53$71,976.141,411,554View SEC Filing Icon  
8/29/2025Duncan MooreDirectorSell75,000$9.28$696,000.00994,553View SEC Filing Icon  
4/17/2025Paul Elliot MannCEOSell316,666$5.62$1,779,662.927,315,454View SEC Filing Icon  
4/17/2025Robert AinscowCOOSell66,668$5.62$374,674.161,419,992View SEC Filing Icon  
4/15/2025Paul Elliot MannCEOSell316,667$5.75$1,820,835.257,948,787View SEC Filing Icon  
4/15/2025Robert AinscowCOOSell66,666$5.75$383,329.501,553,326View SEC Filing Icon  
7/10/2024Ak Jensen Investment ManagemenMajor ShareholderBuy61,849$3.40$210,286.606,678,723View SEC Filing Icon  
7/8/2024Ak Jensen Investment ManagemenMajor ShareholderBuy70,000$3.05$213,500.006,586,874View SEC Filing Icon  
4/29/2024John Andrew RyanDirectorBuy4,313$3.20$13,801.60555,868View SEC Filing Icon  
4/25/2024John Andrew RyanDirectorBuy9,500$3.42$32,490.00546,555View SEC Filing Icon  
1/29/2024John Andrew RyanDirectorBuy15,596$2.35$36,650.60537,055View SEC Filing Icon  
1/25/2024John Andrew RyanDirectorBuy100$2.54$254.00521,459View SEC Filing Icon  
1/16/2024John Andrew RyanDirectorBuy2,550$1.92$4,896.00521,259View SEC Filing Icon  
10/26/2023Todd WiderDirectorBuy94,844$0.96$91,050.24494,844View SEC Filing Icon  
6/29/2023Duncan MooreDirectorBuy100,000$0.50$50,000.00550,000View SEC Filing Icon  
5/10/2023Duncan MooreDirectorBuy10,000$0.50$5,000.00430,000View SEC Filing Icon  
4/6/2023Duncan MooreDirectorBuy20,000$1.00$20,000.00420,000View SEC Filing Icon  
See Full Table

SEC Filings (Institutional Ownership Changes) for ASP Isotopes (NASDAQ:ASPI)

16.80% of ASP Isotopes stock is owned by institutions. Institutional ownership can be a sign of analyst confidence in the fundamentals of the stock.

Institutional Buying and Selling by Quarter

This chart shows the instiutional buying and selling at ASPI by year and by quarter.

Skip Institutional Buying and Selling Chart and Table DataRead Chart Data in Institutional Trading History Table

ASP Isotopes Institutional Trading History

Reporting DateHedge FundShares HeldMarket Value% of PortfolioQuarterly Change in SharesOwnership in CompanyDetails
3/3/2026Caitong International Asset Management Co. Ltd34,983$0.19M0.0%+177.2%0.032%Search for SEC Filing on Google Icon
2/24/2026Pacer Advisors Inc.404,372$2.16M0.0%N/A0.365%Search for SEC Filing on Google Icon
2/19/2026Compound Planning Inc.15,334$82K0.0%N/A0.014%Search for SEC Filing on Google Icon
2/19/2026Invesco Ltd.59,553$0.32M0.0%-58.4%0.054%Search for SEC Filing on Google Icon
2/18/2026Mercer Global Advisors Inc. ADV25,550$0.14M0.0%+21.3%0.023%Search for SEC Filing on Google Icon
2/18/2026Empowered Funds LLC134,602$0.72M0.0%N/A0.121%Search for SEC Filing on Google Icon
2/18/2026VARCOV Co.188,649$1.01M0.4%N/A0.170%Search for SEC Filing on Google Icon
2/18/2026SummitTX Capital L.P.14,128$76K0.0%N/A0.013%Search for SEC Filing on Google Icon
2/18/2026Saba Capital Management L.P.356,377$1.91M0.1%N/A0.322%Search for SEC Filing on Google Icon
2/18/2026Moore Capital Management LP80,000$0.43M0.0%-60.0%0.072%Search for SEC Filing on Google Icon
2/18/2026Janus Henderson Group PLC39,000$0.21M0.0%N/A0.035%Search for SEC Filing on Google Icon
2/18/2026Caption Management LLC13,800$74K0.0%-110.5%0.012%Search for SEC Filing on Google Icon
2/18/2026Balyasny Asset Management L.P.80,527$0.43M0.0%+87.8%0.073%Search for SEC Filing on Google Icon
2/17/2026Guggenheim Capital LLC13,415$72K0.0%N/A0.012%Search for SEC Filing on Google Icon
2/17/2026Schonfeld Strategic Advisors LLC414,875$2.22M0.0%+107.6%0.374%Search for SEC Filing on Google Icon
2/17/2026Burkehill Global Management LP250,000$1.34M0.1%N/A0.226%Search for SEC Filing on Google Icon
2/17/2026AQR Capital Management LLC29,356$0.16M0.0%-91.1%0.026%Search for SEC Filing on Google Icon
2/17/2026Cetera Investment Advisers71,307$0.38M0.0%+453.9%0.064%Search for SEC Filing on Google Icon
2/17/2026Price T Rowe Associates Inc. MD49,044$0.26M0.0%-95.3%0.044%Search for SEC Filing on Google Icon
2/17/2026Advisory Services Network LLC34,372$0.18M0.0%+10.0%0.031%Search for SEC Filing on Google Icon
2/17/2026Corsair Capital Management L.P.15,000$80K0.0%-40.0%0.014%Search for SEC Filing on Google Icon
2/17/2026Arosa Capital Management LP200,000$1.07M0.1%N/A0.180%Search for SEC Filing on Google Icon
2/17/2026California State Teachers Retirement System77,208$0.41M0.0%+1,949.6%0.070%Search for SEC Filing on Google Icon
2/17/2026Russell Investments Group Ltd.145,463$0.78M0.0%+14.9%0.131%Search for SEC Filing on Google Icon
2/17/2026Atom Investors LP44,661$0.24M0.0%N/A0.040%Search for SEC Filing on Google Icon
2/17/2026Royal Bank of Canada32,048$0.17M0.0%-70.2%0.029%Search for SEC Filing on Google Icon
2/17/2026Graham Capital Management L.P.66,998$0.36M0.0%N/A0.060%Search for SEC Filing on Google Icon
2/16/2026Squarepoint Ops LLC27,481$0.15M0.0%-95.6%0.025%Search for SEC Filing on Google Icon
2/16/2026Verition Fund Management LLC187,728$1M0.0%-48.4%0.169%Search for SEC Filing on Google Icon
2/16/2026MML Investors Services LLC14,586$78K0.0%-70.1%0.013%Search for SEC Filing on Google Icon
2/16/2026Fortitude Advisory Group L.L.C.25,995$0.14M0.1%N/A0.023%Search for SEC Filing on Google Icon
2/16/2026Evelyn Partners Investment Management LLP5,000$27K0.0%-50.0%0.005%Search for SEC Filing on Google Icon
2/13/2026Marshall Wace LLP818,129$4.38M0.0%-36.0%0.738%Search for SEC Filing on Google Icon
2/13/2026The Manufacturers Life Insurance Company 28,033$0.15M0.0%+12.1%0.025%Search for SEC Filing on Google Icon
2/13/2026Southport Management L.L.C.85,000$0.46M1.6%+183.3%0.077%Search for SEC Filing on Google Icon
2/13/2026Stifel Financial Corp109,852$0.59M0.0%-6.9%0.099%Search for SEC Filing on Google Icon
2/13/2026AWM Investment Company Inc.2,124,496$11.37M1.1%-28.2%1.917%Search for SEC Filing on Google Icon
2/13/2026Integrated Wealth Concepts LLC18,508$99K0.0%N/A0.017%Search for SEC Filing on Google Icon
2/13/2026Alyeska Investment Group L.P.4,895,546$26.19M0.1%+73.4%4.417%Search for SEC Filing on Google Icon
2/13/2026Charles Schwab Investment Management Inc.885,739$4.74M0.0%+33.8%0.799%Search for SEC Filing on Google Icon
2/13/2026State Street Corp1,844,405$9.87M0.0%+31.2%1.664%Search for SEC Filing on Google Icon
2/13/2026UBS AM a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC102,376$0.55M0.0%N/A0.092%Search for SEC Filing on Google Icon
2/13/2026Wells Fargo & Company MN131,671$0.70M0.0%+179.8%0.119%Search for SEC Filing on Google Icon
2/13/2026HITE Hedge Asset Management LLC449,883$2.41M0.2%N/A0.406%Search for SEC Filing on Google Icon
2/12/2026DRW Securities LLC12,350$66K0.0%-20.0%0.011%Search for SEC Filing on Google Icon
2/12/2026MetLife Investment Management LLC52,633$0.28M0.0%+15.1%0.047%Search for SEC Filing on Google Icon
2/12/2026Commonwealth Equity Services LLC44,899$0.24M0.0%-31.4%0.041%Search for SEC Filing on Google Icon
2/12/2026Tocqueville Asset Management L.P.17,000$91K0.0%N/A0.015%Search for SEC Filing on Google Icon
2/12/2026Marex Group plc85,201$0.46M0.0%+24.4%0.077%Search for SEC Filing on Google Icon
2/12/2026Steward Partners Investment Advisory LLC13,765$74K0.0%N/A0.012%Search for SEC Filing on Google Icon
2/12/2026New York State Common Retirement Fund14,300$77K0.0%-16.4%0.013%Search for SEC Filing on Google Icon
2/12/2026Bank of Montreal Can117,886$0.63M0.0%+12.9%0.106%Search for SEC Filing on Google Icon
2/12/2026Swiss National Bank210,100$1.12M0.0%N/A0.190%Search for SEC Filing on Google Icon
2/12/2026Polen Capital Management LLC139,511$0.75M0.0%-40.1%0.126%Search for SEC Filing on Google Icon
2/12/2026Nuveen LLC182,725$0.98M0.0%+9.2%0.165%Search for SEC Filing on Google Icon
2/11/2026Empowered Funds LLC134,602$0.72M0.0%N/A0.121%Search for SEC Filing on Google Icon
2/11/2026Deutsche Bank AG68,620$0.37M0.0%+60.7%0.062%Search for SEC Filing on Google Icon
2/11/2026LPL Financial LLC47,600$0.26M0.0%+261.5%0.043%Search for SEC Filing on Google Icon
2/11/2026Telemark Asset Management LLC825,000$4.41M0.4%-37.7%0.744%Search for SEC Filing on Google Icon
2/11/2026J.W. Cole Advisors Inc.16,663$85K0.0%N/A0.015%Search for SEC Filing on Google Icon
2/10/2026AXQ Capital LP38,092$0.20M0.0%N/A0.034%Search for SEC Filing on Google Icon
2/10/2026Rovida Investment Management Ltd4,100,000$21.89M3.0%+28.1%3.699%Search for SEC Filing on Google Icon
2/10/2026Intech Investment Management LLC29,516$0.16M0.0%-14.1%0.027%Search for SEC Filing on Google Icon
2/9/2026Geode Capital Management LLC2,384,066$12.76M0.0%+28.0%2.151%Search for SEC Filing on Google Icon
2/9/2026Penn Capital Management Company LLC126,916$0.68M0.1%-37.2%0.115%Search for SEC Filing on Google Icon
2/9/2026Jefferies Financial Group Inc.87,260$0.47M0.0%+120.8%0.079%Search for SEC Filing on Google Icon
2/6/2026Leonteq Securities AG28,515$0.15M0.0%N/A0.026%Search for SEC Filing on Google Icon
2/6/2026Rathbones Group PLC399,599$2.14M0.0%+68.6%0.361%Search for SEC Filing on Google Icon
2/6/2026IFP Advisors Inc9,000$48K0.0%N/A0.008%Search for SEC Filing on Google Icon
2/6/2026GSA Capital Partners LLP329,488$1.76M0.2%+2.9%0.297%Search for SEC Filing on Google Icon
2/6/2026ProShare Advisors LLC16,904$90K0.0%+29.0%0.015%Search for SEC Filing on Google Icon
2/5/2026WIM INVESTMENT MANAGEMENT Ltd601,400$3.22M0.8%N/A0.543%Search for SEC Filing on Google Icon
2/3/2026Canal Insurance CO100,000$0.54M0.1%+233.3%0.090%Search for SEC Filing on Google Icon
2/3/2026SBI Securities Co. Ltd.152,120$0.81M0.0%+196.2%0.137%Search for SEC Filing on Google Icon
1/30/2026Pekin Hardy Strauss Inc.26,700$0.14M0.0%+16.3%0.024%Search for SEC Filing on Google Icon
1/29/2026Pictet Asset Management Holding SA11,334$61K0.0%N/A0.010%Search for SEC Filing on Google Icon
1/29/2026Inscription Capital LLC14,360$77K0.0%N/A0.013%Search for SEC Filing on Google Icon
1/29/2026UBS Group AG2,406,457$12.88M0.0%+150.3%2.171%Search for SEC Filing on Google Icon
1/29/2026Sanctuary Advisors LLC20,150$0.11M0.0%-29.4%0.018%Search for SEC Filing on Google Icon
1/28/2026Arizona State Retirement System21,676$0.12M0.0%N/A0.020%Search for SEC Filing on Google Icon
1/27/2026Zurcher Kantonalbank Zurich Cantonalbank 23,600$0.13M0.0%N/A0.021%Search for SEC Filing on Google Icon
1/26/2026Patriot Financial Group Insurance Agency LLC21,825$0.12M0.0%N/A0.020%Search for SEC Filing on Google Icon
1/26/2026PFG Investments LLC181,800$0.97M0.0%+663.9%0.164%Search for SEC Filing on Google Icon
1/23/2026Farther Finance Advisors LLC124,563$0.67M0.0%+12.0%0.112%Search for SEC Filing on Google Icon
1/22/2026MH & Associates Securities Management Corp ADV48,666$0.26M0.2%N/A0.044%Search for SEC Filing on Google Icon
1/21/2026Rathbones Group PLC399,599$2.14M0.0%+68.6%0.361%Search for SEC Filing on Google Icon
1/16/2026FNY Investment Advisers LLC85,100$0.46M0.1%+580.8%0.077%Search for SEC Filing on Google Icon
1/14/2026Exchange Traded Concepts LLC1,400,314$7.49M0.1%+16.1%1.263%Search for SEC Filing on Google Icon
1/1/2026Tudor Investment Corp ET AL460,685$4.43M0.0%+37.5%0.416%Search for SEC Filing on Google Icon
12/15/2025FNY Investment Advisers LLC12,500$0.12M0.0%+1,137.6%0.011%Search for SEC Filing on Google Icon
12/9/2025Tudor Investment Corp ET AL460,685$4.43M0.0%+37.5%0.416%Search for SEC Filing on Google Icon
11/24/2025Penn Capital Management Company LLC202,144$1.95M0.1%+983.0%0.182%Search for SEC Filing on Google Icon
11/19/2025Caitong International Asset Management Co. Ltd12,622$0.12M0.1%+331.2%0.014%Search for SEC Filing on Google Icon
11/18/2025Advisory Services Network LLC31,238$0.30M0.0%+125.8%0.033%Search for SEC Filing on Google Icon
11/17/2025NewEdge Advisors LLC21,900$0.21M0.0%N/A0.023%Search for SEC Filing on Google Icon
11/17/2025XTX Topco Ltd139,782$1.35M0.1%+478.7%0.150%Search for SEC Filing on Google Icon
11/17/2025Alyeska Investment Group L.P.2,822,695$27.15M0.1%-32.5%3.022%Search for SEC Filing on Google Icon
11/17/2025Verition Fund Management LLC363,765$3.50M0.0%+417.7%0.389%Search for SEC Filing on Google Icon
11/17/2025Scientech Research LLC64,388$0.62M0.2%-7.0%0.069%Search for SEC Filing on Google Icon
11/17/2025Sig Brokerage LP20,912$0.20M0.0%N/A0.022%Search for SEC Filing on Google Icon
Data available starting January 2016

See Full Table
ASP Isotopes logo
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.
Read More on ASP Isotopes

Today's Range

Now: $4.35
Low: $4.38
High: $4.56

50 Day Range

MA: $5.85
Low: $4.22
High: $8.48

52 Week Range

Now: $4.35
Low: $3.92
High: $14.49

Volume

2,120,375 shs

Average Volume

5,446,033 shs

Market Capitalization

$481.71 million

P/E Ratio

N/A

Dividend Yield

N/A

Beta

3.55

Who are the company insiders with the largest holdings of ASP Isotopes?

ASP Isotopes' top insider shareholders include:
  1. Paul Elliot Mann (CEO)
  2. Paul Elliot Mann (Insider)
  3. Paul Elliot Mann (Chairman)
  4. Ak Jensen Investment Managemen (Major Shareholder)
  5. Robert Ainscow (CEO)
  6. Robert Ainscow (COO)
  7. Duncan Moore (Director)
  8. Heather Kiessling (CFO)
  9. Todd Wider (Director)
  10. Robert John Andrew Ryan (Director)
Learn More about top insider investors at ASP Isotopes.

Who are the major institutional investors of ASP Isotopes?

ASP Isotopes' top institutional investors include:
  1. Alyeska Investment Group L.P. — 4.42%
  2. Rovida Investment Management Ltd — 3.70%
  3. UBS Group AG — 2.17%
  4. Geode Capital Management LLC — 2.15%
  5. AWM Investment Company Inc. — 1.92%
  6. State Street Corp — 1.66%
Learn More about top institutional investors of ASP Isotopes stock.

Which institutional investors are selling ASP Isotopes stock?

Within the previous quarter, ASPI stock was sold by these institutional investors:
  1. Price T Rowe Associates Inc. MD
  2. AWM Investment Company Inc.
  3. Squarepoint Ops LLC
  4. Telemark Asset Management LLC
  5. Marshall Wace LLP
  6. AQR Capital Management LLC
  7. Verition Fund Management LLC
  8. Moore Capital Management LP
Within the previous year, company insiders that have sold ASP Isotopes company stock include:
  1. Paul Elliot Mann (CEO)
  2. Paul Elliot Mann (Insider)
  3. Paul Elliot Mann (Chairman)
  4. Ak Jensen Investment Managemen (Major Shareholder)
  5. Robert Ainscow (CEO)
  6. Robert Ainscow (COO)
  7. Duncan Moore (Director)
  8. Heather Kiessling (CFO)
  9. Todd Wider (Director)
Learn More investors selling ASP Isotopes stock.

Which institutional investors are buying ASP Isotopes stock?

Within the previous quarter, ASPI stock was purchased by institutional investors including:
  1. Alyeska Investment Group L.P.
  2. UBS Group AG
  3. Rovida Investment Management Ltd
  4. WIM INVESTMENT MANAGEMENT Ltd
  5. Geode Capital Management LLC
  6. IMC Chicago LLC
  7. HITE Hedge Asset Management LLC
  8. State Street Corp
In the last year, these company insiders have bought ASP Isotopes stock:
  1. Paul Elliot Mann (CEO)
  2. Paul Elliot Mann (Insider)
Learn More investors buying ASP Isotopes stock.

ASP Isotopes Active Insiders

Paul Elliot Mann
Paul Elliot Mann (Age 49)
CEO
3 recent trades
Robert Ainscow (Age 50)
COO
5 recent trades
Heather Kiessling
Heather Kiessling
CFO
1 recent trades
Todd Wider
Todd Wider
Director
Robert John Andrew Ryan
Robert John Andrew Ryan
Director
Duncan Moore
Director
Michael Gorley
Michael Gorley
Director
1 recent trades