ASP Isotopes Inc.
DE ˙ DB ˙ US00218A1051
SecurityDE:W62 / ASP Isotopes Inc.
InstitutionState Street Corp
Latest Disclosed Ownership2,322,159 shares
Latest Disclosed Value $ 10,263,943
State Street Corp reports 25.90% increase in ownership of W62 / ASP Isotopes Inc.

On May 15, 2026 - State Street Corp filed a 13F-HR form disclosing ownership of 2,322,159 shares of ASP Isotopes Inc. (DE:W62) valued at $10,263,943 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 1,844,405 shares of ASP Isotopes Inc.. This represents a change in shares of 25.90% during the quarter.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-15 2026-03-31 13F ASP ISOTOPES COM 00218A105 2,322,159 477,754 25.90 10,264 4.01 0.0004
2026-02-13 2025-12-31 13F ASP ISOTOPES COM 00218A105 1,844,405 438,673 31.21 9,868 -27.04 0.0003
2025-11-14 2025-09-30 13F ASP ISOTOPES COM 00218A105 1,405,732 291,532 26.17 13,523 64.91 0.0005
2025-08-14 2025-06-30 13F ASP ISOTOPES COM 00218A105 1,114,200 66,856 6.38 8,201 66.94 0.0003
2025-05-15 2025-03-31 13F ASP ISOTOPES COM 00218A105 1,047,344 17,612 1.71 4,912 5.32 0.0002
2025-02-14 2024-12-31 13F ASP ISOTOPES COM 00218A105 1,029,732 176,037 20.62 4,665 96.54 0.0002
2024-11-14 2024-09-30 13F ASP ISOTOPES COM 00218A105 853,695 96,604 12.76 2,373 2.46 0.0001
2024-08-14 2024-06-30 13F ASP ISOTOPES COM 00218A105 757,091 640,991 552.10 2,317 383.51 0.0001
2024-05-15 2024-03-31 13F ASP ISOTOPES COM 00218A105 116,100 103,800 843.90 479 2,077.27 0.0000
2024-02-14 2023-12-31 13F ASP ISOTOPES COM 00218A105 12,300 12,300 22 0.0000
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.