ASP Isotopes Inc

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ASP Isotopes Inc
TickerASPI
CIK #0001921865
CUSIP00218A105
SectorLife Sciences - Miscellaneous Chemical Products
Address433 Plaza Real, Suite 275, Boca Raton, FL 33432
Source [EDGAR]
Reg D Offering (Form D) Filed Raised Terms
ASP Isotopes Inc 2023-03-21 5.0 M Exemption: 506(b) · Minimum: $5,000,000 · Duration: One year or less · Commission: $400,000 · Revenue: No Revenues
CIK Filing 2011 - 2026
[0001921865] 10-K
[0001921865] 10-Q
[0001921865] 3
[0001921865] 4
[0001921865] 5
[0001921865] 8-K
[0001921865] D
[0001921865] SC 13G
Form 13D/13G Filer Form 13D/13G Subject Filed % Owned
Vanguard Group Inc ASP Isotopes Inc [2026-01-30] 0.0
Encompass Capital Advisors LLC ASP Isotopes Inc [2026-01-23] 0.0
AWM Investment Company Inc ASP Isotopes Inc [2025-08-14] 0.0
BNP Paribas Asset Management UK Ltd ASP Isotopes Inc [2025-04-11] 0.0
Mann Paul Elliot ASP Isotopes Inc [2025-02-14] 0.0
BlackRock Inc ASP Isotopes Inc [2025-02-04] 0.0
AWM Investment Company Inc ASP Isotopes Inc [2024-11-14] 5.1
AK Jensen Investment Management Ltd ASP Isotopes Inc [2023-11-03] 13.8
Form 3/4/5 Filer 2011 - 2026
ASP Isotopes Inc
Kiessling Heather
Ainscow Donald George
Wider Todd
Gorley Michael
Ainscow Robert
Mann Paul Elliot
Moore Duncan
Hunter Ralph L JR
Ryan Robert John Andrew
AK Jensen Investment Management Ltd
Donfeld Joshua Jay
Vasnetsov Sergey
Strydom Hendrik
Ronander Einar
Insider Transaction (Form 3/4/5) Date Action Shares Price Value ($)
Ainscow Robert
Common Stock
2026-03-06 Sell 8,438 $5.44 45,903
Mann Paul Elliot
Common Stock
2026-03-02 Sell 162,153 $5.44 882,112
Wider Todd
Common Stock
2025-12-18 Grant 36,548
Ryan Robert John Andrew
Common Stock
2025-12-18 Grant 36,548
Gorley Michael
Common Stock
2025-12-18 Grant 36,548
Hunter Ralph L JR
Common Stock
2025-12-18 Grant 36,548
Kiessling Heather
Common Stock
2025-12-18 Sell 80,000 $5.80 464,000
Ainscow Robert
Common Stock
2025-12-08 Sell 8,438 $6.20 52,316
Mann Paul Elliot
Common Stock
2025-12-01 Sell 162,153 $5.75 932,380
Ainscow Robert
Common Stock
2025-11-25 Sell 25,000 $5.77 144,250
Mann Paul Elliot
Common Stock
2025-11-25 Sell 50,000 $5.77 288,500
Mann Paul Elliot
Common Stock
2025-11-17 Sell 112,500 $7.51 844,875
Ainscow Robert
Common Stock
2025-11-17 Sell 67,500 $7.51 506,925
Wider Todd
Common Stock
2025-11-12 Grant 25,469
Ainscow Robert
Common Stock
2025-10-14 Sell 22,500 $13.60 306,000
Gorley Michael
Common Stock
2025-09-30 Sell 64,000 $9.75 624,000
Wider Todd
Common Stock
2025-09-15 Sell 74,108 $8.76 649,186
Wider Todd
Common Stock
2025-09-14 Option exercise 96,000 $2.00 192,000
Wider Todd
Stock Option (right to buy) · derivative
2025-09-14 Option exercise 96,000 $0.00
Wider Todd
Common Stock
2025-09-14 Tax withheld 21,892 $8.77 191,993
showing 20 of 108 most recent transactions
13F Ownership Over TimeHoldersShares Held
2026-03-31 180 73,711,128
2025-12-31 177 68,205,211
2025-09-30 161 61,425,268
2025-06-30 132 44,902,215
2025-03-31 103 30,991,901
2024-12-31 99 28,480,922
2024-09-30 70 22,418,520
2024-06-30 52 8,812,285
2024-03-31 32 3,881,038
2023-12-31 20 1,674,542
2023-09-30 12 308,068
2023-06-30 5 551,482
Form 13F Holdings
Firm Period DFND Voting Shares
Fort Washington Investment Advisors Inc /OH/ [2026-06-30] SOLE 67,136 67,136
Farther Finance Advisors LLC [2026-06-30] SOLE 0 62,618
Ninety One SA PTY Ltd [2026-06-30] SOLE 40,489 40,489
Valeo Financial Advisors LLC [2026-06-30] SOLE 30,000 30,000
Silverberg Bernstein Capital Management LLC [2026-06-30] SOLE 0 12,440
Bank of New Hampshire [2026-06-30] SOLE 0 3,000
Adirondack Trust Co [2026-06-30] SOLE 986 986
Gamma Investing LLC [2026-06-30] DFND 248 248
FNY Investment Advisers LLC [2026-06-30] SOLE 80,100 80
MassMutual Private Wealth & Trust FSB [2026-06-30] SOLE 72 72
Hughes Financial Services LLC [2026-06-30] SOLE 2 2
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