# ASP ISOTOPES INC COM

ASP ISOTOPES INC COM is a security (CUSIP 00218A105) tracked across SEC portfolio filings. 182 institutional managers reported $343.3M on Form 13F as of 2026-06-30; 11 registered fund positions totaling $11.0M via N-PORT as of 2026-05-31.

## Summary

- Issuer: ASP ISOTOPES INC
- Class: COM
- CUSIP: 00218A105
- Asset category: EC
- 13F holders: 182
- 13F value: $343.3M
- 13F period: 2026-06-30
- N-PORT fund positions: 11
- N-PORT value: $11.0M
- N-PORT report: 2026-05-31

## Top institutional holders (Form 13F)

_Showing 15 of 182 managers by value._

| Manager | Location | Value | Shares |
| --- | --- | --- | --- |
| BlackRock, Inc. | New York, NY | $36.8M | 8,328,144 |
| [VANGUARD GROUP INC](https://search.stillhousedata.com/firm/105958) | Valley Forge, PA | $34.3M | 6,406,244 |
| [Encompass Capital Advisors LLC](https://search.stillhousedata.com/firm/160113) | New York, NY | $30.6M | 6,912,054 |
| Rovida Investment Management Ltd | Grand Cayman, E9 | $25.5M | 4,100,000 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | BALA CYNWYD, PA | $23.6M | 1,057,340 |
| [EXCHANGE TRADED CONCEPTS, LLC](https://search.stillhousedata.com/firm/151197) | Oklahoma City, OK | $14.0M | 2,255,509 |
| UBS Group AG | Zurich, V8 | $13.2M | 2,841,709 |
| [GEODE CAPITAL MANAGEMENT, LLC](https://search.stillhousedata.com/firm/115504) | BOSTON, MA | $12.1M | 2,740,464 |
| [Alyeska Investment Group, L.P.](https://search.stillhousedata.com/firm/155058) | CHICAGO, IL | $11.9M | 2,692,166 |
| [CITADEL ADVISORS LLC](https://search.stillhousedata.com/firm/148826) | MIAMI, FL | $11.7M | 768,006 |
| STATE STREET CORP | BOSTON, MA | $10.3M | 2,322,159 |
| AWM Investment Company, Inc. | NEW YORK, NY | $9.4M | 2,124,496 |
| PEAK6 LLC | CHICAGO, IL | $7.8M | 79,212 |
| MORGAN STANLEY | NEW YORK, NY | $7.0M | 1,576,413 |
| WOLVERINE TRADING, LLC | CHICAGO, IL | $6.3M | 16,497 |

## Top fund holders (N-PORT)

| Fund | Registrant | Value | % of fund |
| --- | --- | --- | --- |
| [VANGUARD EXTENDED MARKET INDEX FUND](https://search.stillhousedata.com/fund/S000002841) | VANGUARD INDEX FUNDS | $5.5M | 0.68% |
| [VANGUARD RUSSELL 2000 INDEX FUND](https://search.stillhousedata.com/fund/S000030003) | VANGUARD SCOTTSDALE FUNDS | $4.5M | 2.59% |
| [Master Small Cap Index Series](https://search.stillhousedata.com/fund/S000002716) | Quantitative Master Series LLC | $679K | 1.41% |
| Saba Capital Income & Opportunities Fund | Saba Capital Income & Opportunities Fund | $416K | 10.54% |
| [VANGUARD BALANCED INDEX FUND](https://search.stillhousedata.com/fund/S000002560) | VANGUARD VALLEY FORGE FUNDS | $260K | 0.04% |
| [VANGUARD INSTITUTIONAL TOTAL STOCK MARKET INDEX FUND](https://search.stillhousedata.com/fund/S000002855) | VANGUARD INSTITUTIONAL INDEX FUNDS | $218K | 0.07% |
| Saba Capital Income & Opportunities Fund II | Saba Capital Income & Opportunities Fund II | $177K | 6.85% |
| [DWS Small Cap Index VIP](https://search.stillhousedata.com/fund/S000006223) | DEUTSCHE DWS INVESTMENTS VIT FUNDS | $70K | 1.67% |
| [TIAA Separate Account VA-1 - Stock Index Account](https://search.stillhousedata.com/fund/S000005098) | TIAA Separate Account VA-1 | $7K | 0.06% |
| [Blackstone Alternative Multi-Strategy Fund](https://search.stillhousedata.com/fund/S000045538) | Blackstone Alternative Investment Funds | $-114K | -0.32% |
| [VANGUARD MARKET NEUTRAL FUND](https://search.stillhousedata.com/fund/S000019457) | VANGUARD MONTGOMERY FUNDS | $-742K | -17.19% |

## More

- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/security/00218A105.md)
- [Search all SEC filings, advisers and people on Adviser Search](https://search.stillhousedata.com/)

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Source: public SEC filing data via Adviser Search (https://search.stillhousedata.com).
Agents: this data is also queryable via MCP tools and read-only SQL — see https://search.stillhousedata.com/llms.txt.