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ASPI · ASP Isotopes Inc.

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$4.10 -0.10 (-2.38%)
Market Cap
$643.90M
Shares
153.31M

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Holders: 189
Total Value: $465,071,600
Total Shares: 74,770,372
Showing 1–100 of 200 holdings by value · page 1 of 2

Institutional Ownership Trend

15 quarters

Holder Concentration

Across 189 13F filers · Δ vs Mar 31, 2026
Top Holder
12.3%
Sep 2023 → Jun 2026 · range 8.9% – 33.9%
+1.0 pts
Top 5
39.3%
Sep 2023 → Jun 2026 · range 34.5% – 86.0%
−1.2 pts
Top 10
58.6%
Sep 2023 → Jun 2026 · range 53.1% – 100.0%
−0.1 pts
HHI
462
Sep 2023 → Jun 2026 · range 382 – 2,400
Broadly held−4

Quarterly Activity

vs Mar 31, 2026
New
40
Increased
77
Decreased
52
Sold Out
31
Unchanged
20
Holder count: +9
Institutional value: +43.3%
Shares held: +1.9%

Top Buyers

vs Mar 31, 2026
Institution Added Now Holds Open

Top Sellers

vs Mar 31, 2026
Institution Sold Now Holds Open

Top New Positions

vs Mar 31, 2026
Institution Acquired Value (USD) Open

Top Sold-Out Positions

vs Mar 31, 2026
Institution Previously Held Last Value (USD) Open
Showing 100 of 200
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Holder Value (USD) % of 13F Shares Open
Key facts CIK 1921865 CUSIP 00218A105 13F (30d) 124 filings 124 filers Visit website Investor relations