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ASPI Insider Trading

Insider Ownership Percentage: 14.40%
Insider Buying (Last 12 Months): $0.00
Insider Selling (Last 12 Months): $7,480,310.49

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: $3.01
Price Change: ▼ Price Decrease of -0.17 (-5.35%)
As of 09/23/2026 04:00 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
9/8/2026Robert AinscowCOOSell8,438$4.29$36,199.022,248,441View SEC Filing Icon  
9/4/2026Paul Elliot MannCEOSell83,759$4.10$343,411.909,328,570View SEC Filing Icon  
9/2/2026Paul Elliot MannCEOSell83,758$3.91$327,493.789,496,087View SEC Filing Icon  
9/2/2026Robert AinscowCOOSell25,000$3.90$97,500.002,256,879View SEC Filing Icon  
7/1/2026Heather KiesslingCFOSell23,124$6.28$145,218.721,526,252View SEC Filing Icon  
6/30/2026Michael GorleyDirectorSell30,000$6.27$188,100.0087,908View SEC Filing Icon  
6/29/2026Todd WiderDirectorSell50,000$6.25$312,500.00722,247View SEC Filing Icon  
6/8/2026Robert AinscowCOOSell8,438$7.00$59,066.002,281,879View SEC Filing Icon  
6/3/2026Paul Elliot MannCEOSell83,759$7.76$649,969.849,579,845View SEC Filing Icon  
6/2/2026Paul Elliot MannCEOSell83,758$8.29$694,353.829,663,424View SEC Filing Icon  
4/16/2026Duncan MooreDirectorSell11,642$5.21$60,654.821,044,928View SEC Filing Icon  
4/16/2026Robert AinscowCOOSell22,500$5.21$117,225.001,490,317View SEC Filing Icon  
4/15/2026Heather KiesslingCFOSell23,124$5.48$126,719.52709,376View SEC Filing Icon  
3/6/2026Robert AinscowCOOSell8,438$5.44$45,902.721,537,817View SEC Filing Icon  
3/6/2026Robert AinscowCOOSell25,000$4.51$112,750.001,512,817View 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  
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
9/9/2026WINTON GROUP Ltd94,512$0.59M0.0%N/A0.062%Search for SEC Filing on Google Icon
9/9/2026Integrated Wealth Concepts LLC28,316$0.18M0.0%N/A0.018%Search for SEC Filing on Google Icon
9/9/2026Squarepoint Ops LLC123,951$0.77M0.0%+75.6%0.081%Search for SEC Filing on Google Icon
9/8/2026Allworth Financial LP8,221$51K0.0%-33.9%0.005%Search for SEC Filing on Google Icon
8/26/2026Amundi17,212$0.11M0.0%N/A0.011%Search for SEC Filing on Google Icon
8/21/2026AXQ Capital LP12,922$80K0.0%N/A0.008%Search for SEC Filing on Google Icon
8/20/2026Headlands Technologies LLC240,197$1.49M0.2%+219.6%0.157%Search for SEC Filing on Google Icon
8/20/2026Alyeska Investment Group L.P.2,843,503$17.69M0.0%+5.6%1.855%Search for SEC Filing on Google Icon
8/20/2026Penn Capital Management Company LLC70,757$0.44M0.0%-10.2%0.046%Search for SEC Filing on Google Icon
8/19/2026UBS AM a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC161,219$1M0.0%+43.3%0.105%Search for SEC Filing on Google Icon
8/19/2026Kingsview Wealth Management LLC54,102$0.34M0.0%N/A0.035%Search for SEC Filing on Google Icon
8/18/2026Empowered Funds LLC225,089$1.40M0.0%N/A0.147%Search for SEC Filing on Google Icon
8/17/2026Philadelphia Financial Management of San Francisco LLC1,343,007$8.35M0.0%N/A0.876%Search for SEC Filing on Google Icon
8/17/2026Bank of America Corp DE709,057$4.41M0.0%N/A0.462%Search for SEC Filing on Google Icon
8/15/2026Man Group plc828,377$5.15M0.0%N/A0.540%Search for SEC Filing on Google Icon
8/15/2026Jupiter Topco LLC39,000$0.24M0.0%N/A0.025%Search for SEC Filing on Google Icon
8/15/2026AWM Investment Company Inc.1,581,490$9.84M0.9%N/A1.032%Search for SEC Filing on Google Icon
8/14/2026Legal & General Group Plc86,951$0.54M0.0%N/A0.057%Search for SEC Filing on Google Icon
8/14/2026The Manufacturers Life Insurance Company30,656$0.19M0.0%N/A0.020%Search for SEC Filing on Google Icon
8/13/2026Sanctuary Advisors LLC32,195$0.20M0.0%N/A0.021%Search for SEC Filing on Google Icon
8/12/2026Quantbot Technologies LP9,707$60K0.0%N/A0.006%Search for SEC Filing on Google Icon
8/11/2026Allworth Financial LP8,221$51K0.0%N/A0.005%Search for SEC Filing on Google Icon
8/10/2026Tocqueville Asset Management L.P.20,000$0.12M0.0%N/A0.013%Search for SEC Filing on Google Icon
8/8/2026Wealthfront Advisers LLC13,188$82K0.0%N/A0.009%Search for SEC Filing on Google Icon
8/7/2026BlackRock Inc.9,217,198$57.33M0.0%N/A6.012%Search for SEC Filing on Google Icon
8/7/2026Deutsche Bank AG120,367$0.75M0.0%N/A0.079%Search for SEC Filing on Google Icon
8/7/2026Persistent Asset Partners Ltd18,363$0.11M0.0%N/A0.012%Search for SEC Filing on Google Icon
8/6/2026Fielder Capital Group LLC18,083$0.11M0.0%N/A0.012%Search for SEC Filing on Google Icon
8/6/2026Bank of New York Mellon Corp356,872$2.22M0.0%N/A0.233%Search for SEC Filing on Google Icon
7/9/2026Valeo Financial Advisors LLC30,000$0.19M0.0%N/A0.024%Search for SEC Filing on Google Icon
7/8/2026FNY Investment Advisers LLC80,100$0.50M0.2%-7.5%0.064%Search for SEC Filing on Google Icon
6/18/2026Pacer Advisors Inc.503,925$2.23M0.0%+24.6%0.400%Search for SEC Filing on Google Icon
6/16/2026Empowered Funds LLC185,953$0.82M0.0%+38.2%0.148%Search for SEC Filing on Google Icon
6/9/2026Rathbones Group PLC386,566$1.71M0.0%-3.3%0.307%Search for SEC Filing on Google Icon
5/19/2026Bank of America Corp DE168,997$0.75M0.0%-26.8%0.134%Search for SEC Filing on Google Icon
5/18/2026Royal Bank of Canada37,954$0.17M0.0%+18.4%0.030%Search for SEC Filing on Google Icon
5/18/2026Empowered Funds LLC185,953$0.82M0.0%+38.2%0.148%Search for SEC Filing on Google Icon
5/18/2026Encompass Capital Advisors LLC6,912,054$30.55M0.9%N/A5.490%Search for SEC Filing on Google Icon
5/16/2026The Manufacturers Life Insurance Company30,503$0.14M0.0%+8.8%0.024%Search for SEC Filing on Google Icon
5/16/2026Quantinno Capital Management LP33,067$0.15M0.0%-41.8%0.026%Search for SEC Filing on Google Icon
5/15/2026Broadhurst Jeffrey B10,000$44K0.0%N/A0.008%Search for SEC Filing on Google Icon
5/14/2026Sei Investments Co.148,648$0.66M0.0%+93.0%0.118%Search for SEC Filing on Google Icon
5/14/2026State of Wyoming6,552$29K0.0%N/A0.005%Search for SEC Filing on Google Icon
5/13/2026Cetera Investment Advisers114,817$0.51M0.0%+61.0%0.091%Search for SEC Filing on Google Icon
5/5/2026Wealthfront Advisers LLC10,149$45K0.0%N/A0.008%Search for SEC Filing on Google Icon
5/5/2026Bank of New York Mellon Corp289,009$1.28M0.0%+18.5%0.230%Search for SEC Filing on Google Icon
5/5/2026Sanctuary Advisors LLC24,615$0.11M0.0%+22.2%0.020%Search for SEC Filing on Google Icon
4/28/2026Stephens Inc. AR10,000$44K0.0%N/A0.008%Search for SEC Filing on Google Icon
4/27/2026PFG Investments LLC152,300$0.67M0.0%-16.2%0.121%Search for SEC Filing on Google Icon
4/27/2026Leonteq Securities AG9,000$40K0.0%-68.4%0.007%Search for SEC Filing on Google Icon
4/22/2026Patriot Financial Group Insurance Agency LLC44,980$0.20M0.0%+106.1%0.036%Search for SEC Filing on Google Icon
4/17/2026Sara Bay Financial586,673$2.59M0.8%N/A0.466%Search for SEC Filing on Google Icon
4/16/2026SG Americas Securities LLC97,985$0.43M0.0%N/A0.078%Search for SEC Filing on Google Icon
4/16/2026Allegheny Financial Group40,649$0.18M0.0%+17.9%0.032%Search for SEC Filing on Google Icon
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
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: $3.01
Low: $3.01
High: $3.15

50 Day Range

MA: $3.87
Low: $3.01
High: $4.44

52 Week Range

Now: $3.01
Low: $3.01
High: $14.49

Volume

2,621,614 shs

Average Volume

3,826,715 shs

Market Capitalization

$461.46 million

P/E Ratio

N/A

Dividend Yield

N/A

Beta

3.59

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 (COO)
  6. Robert Ainscow (CEO)
  7. Heather Kiessling (CFO)
  8. Duncan Moore (Director)
  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. BlackRock Inc. — 6.01%
  2. Alyeska Investment Group L.P. — 1.85%
  3. AWM Investment Company Inc. — 1.03%
  4. Philadelphia Financial Management of San Francisco LLC — 0.88%
  5. Man Group plc — 0.54%
  6. Bank of America Corp DE — 0.46%
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. Penn Capital Management Company LLC
  2. FNY Investment Advisers LLC
  3. Allworth Financial 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. Robert Ainscow (COO)
  5. Robert Ainscow (CEO)
  6. Heather Kiessling (CFO)
  7. Duncan Moore (Director)
  8. Todd Wider (Director)
  9. Michael Gorley (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. BlackRock Inc.
  2. AWM Investment Company Inc.
  3. Philadelphia Financial Management of San Francisco LLC
  4. Man Group plc
  5. Bank of America Corp DE
  6. Bank of New York Mellon Corp
  7. Empowered Funds LLC
  8. Headlands Technologies LLC

ASP Isotopes Active Insiders

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