Feeds › Ownership stakes (13D / 13G)
Ownership stakes (13D / 13G)
Investors who own more than 5% of a company, from activists (13D) to passive holders (13G).
About this data
- What it is
- An investor who owns more than 5% of a public company must say so. Investors who may try to influence the company, such as activists, file the longer Schedule 13D; passive holders file the shorter Schedule 13G.
- Who files it
- The investor, within days of crossing 5%, and again whenever the stake changes materially.
- How current
- We collect new filings throughout the day on SEC business days.
- Worth knowing
- 13G filings are far more common than 13D. A 13D usually means the investor intends to push for changes, so it tends to get more attention.
All of this comes from public filings.
Source and freshness · Information, not investment advice (disclaimer).
Filings per day, last 30 days
13D (activist) 13G (passive)
Latest ownership filings
Showing: ticker ASPI
| Filed | ScheduleBoth report a stake of more than 5%. A 13D is filed by investors who may try to influence the company, such as activists; a 13G by passive holders. | Company | Investor | Shares | % of shares | Filing |
|---|---|---|---|---|---|---|
| Apr 27, 2026 | SCHEDULE 13G/A (amended) | ASPI ASP Isotopes Inc. | BlackRock, Inc. | 8.27M | 6.6% | SCHEDULE 13G/A ↗ |
| Mar 26, 2026 | SCHEDULE 13G/A (amended) | ASPI ASP Isotopes Inc. | The Vanguard Group | 0 | 0.0% | SCHEDULE 13G/A ↗ |
| Feb 17, 2026 | SCHEDULE 13G/A (amended) | ASPI ASP Isotopes Inc. | Paul Elliot Mann | 7.76M | 7.0% | SCHEDULE 13G/A ↗ |
| Feb 9, 2026 | SCHEDULE 13G/A (amended) | ASPI ASP Isotopes Inc. | BNP Paribas Asset Management UK Ltd | 944,326 | 0.9% | SCHEDULE 13G/A ↗ |
| Jan 30, 2026 | SCHEDULE 13G | ASPI ASP Isotopes Inc. | The Vanguard Group | 6.41M | 5.8% | SCHEDULE 13G ↗ |
| Jan 23, 2026 | SCHEDULE 13G | ASPI ASP Isotopes Inc. | Todd J. Kantor | 6.41M | 5.1% | SCHEDULE 13G ↗ |
| Jan 23, 2026 | SCHEDULE 13G | ASPI ASP Isotopes Inc. | Encompass Capital Advisors LLC | 6.41M | 5.1% | SCHEDULE 13G ↗ |
| Nov 14, 2025 | SCHEDULE 13G/A (amended) | ASPI ASP Isotopes Inc. | AK Jensen Investment Management Ltd | 4.96M | 5.4% | SCHEDULE 13G/A ↗ |
| Aug 14, 2025 | SCHEDULE 13G/A (amended) | ASPI ASP Isotopes Inc. | AWM Investment Company, Inc. | 3.93M | 4.3% | SCHEDULE 13G/A ↗ |
| Aug 14, 2025 | SCHEDULE 13G | ASPI ASP Isotopes Inc. | AWM Investment Company, Inc. | 619,874 | 6.9% | SCHEDULE 13G ↗ |
| Apr 11, 2025 | SCHEDULE 13G | ASPI ASP Isotopes Inc. | BNP Paribas Asset Management UK Ltd | 3.63M | 5.1% | SCHEDULE 13G ↗ |
| Feb 18, 2025 | SCHEDULE 13G/A (amended) | ASPI ASP Isotopes Inc. | Paul Elliot Mann | 7.71M | 10.8% | SCHEDULE 13G/A ↗ |
| Feb 18, 2025 | SCHEDULE 13G/A (amended) | ASPI ASP Isotopes Inc. | Paul Elliot Mann | 6.58M | 11.9% | SCHEDULE 13G/A ↗ |
| Feb 14, 2025 | SCHEDULE 13G | ASPI ASP Isotopes Inc. | Paul Elliot Mann | 5.31M | 14.2% | SCHEDULE 13G ↗ |
| Feb 12, 2025 | SCHEDULE 13G/A (amended) | ASPI ASP Isotopes Inc. | AK Jensen Investment Management Limited | 4.71M | 6.6% | SCHEDULE 13G/A ↗ |
| Feb 4, 2025 | SCHEDULE 13G | ASPI ASP Isotopes Inc. | BlackRock, Inc. | 3.96M | 5.5% | SCHEDULE 13G ↗ |
16 items, most recent first (up to 50). Every row links to its original filing. Updated Nov 15, 2026, 5:12 PM EST.
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