ASP Isotopes Inc.

Historical 13F Holders

Symbol
ASPI
CUSIP
00218A105
All holders as of
Q2 2026
Type
Equity
Class
COM
Reported Value, Excluding Options
Total Filings

13D/G Filers

Investors who own more than 5% of a class must file a Schedule 13D or 13G. Every filing for 00218A105 since 12/18/2024, newest first.

Filer % of Class Filed
BlackRock, Inc. 13G/A Amendment 1 6.6% 4/27/2026
Event 3/31/2026
Vanguard Group Inc 13G/A Amendment 1 0% 3/26/2026
Event 3/13/2026
Mann Paul Elliot 13G/A Amendment 3 7.0% 2/17/2026
Event 12/31/2025
AWM Investment Company, Inc. 13G/A Amendment 1 5.8% 2/13/2026
Event 12/31/2025
BNP Paribas Asset Management UK Ltd 13G/A Amendment 1 0.9% 2/9/2026
Event 12/31/2025
Vanguard Group Inc 13G 5.8% 1/30/2026
Event 12/31/2025
Encompass Capital Advisors LLC 13G
5.1% 1/23/2026
Event 1/16/2026
AK Jensen Investment Management Ltd 13G/A Amendment 3 5.4% 11/14/2025
Event 9/30/2025
AWM Investment Company, Inc. 13G 6.9% 8/14/2025
Event 6/30/2025
AWM Investment Company, Inc. 13G/A Amendment 1 4.3% 8/14/2025
Event 6/30/2025
AWM Investment Company, Inc. 13G 6.9% 8/14/2025
Event 6/30/2025
BNP Paribas Asset Management UK Ltd 13G 5.1% 4/11/2025
Event 3/31/2025
Mann Paul Elliot 13G/A Amendment 2 10.8% 2/18/2025
Event 12/31/2024
Mann Paul Elliot 13G/A Amendment 1 11.9% 2/18/2025
Event 12/31/2023
Mann Paul Elliot 13G 14.2% 2/14/2025
Event 12/31/2022
AK Jensen Investment Management Ltd 13G/A Amendment 2 6.6% 2/12/2025
Event 12/31/2024
BlackRock, Inc. 13G 5.5% 2/4/2025
Event 12/31/2024

13F Holders by Quarter

Period Filings Shares, Excl. Options Value, Excl. Options
2026 Q3 15 379 k $1.00 M
2026 Q2 202 66.2 M $527 M
2026 Q1 194 64.2 M $284 M
2025 Q4 193 59.0 M $316 M
2025 Q3 180 53.3 M $513 M
2025 Q2 150 41.5 M $306 M
2025 Q1 110 32.6 M $153 M
2024 Q4 103 32.5 M $147 M
2024 Q3 71 22.4 M $62.5 M
2024 Q2 54 8.94 M $27.3 M
2024 Q1 35 4.00 M $16.5 M
2023 Q4 21 1.67 M $3.01 M
2023 Q3 12 308 k $293 k
2023 Q2 5 551 k $1.02 M
2023 Q1 7 3.25 M $2.77 M
2022 Q4 4 47.2 k $75.3 k