Security key
00218A105
- Security type / class
- Equity / Common Stock
- Total 13F shares
- 63,841,286
- Total 13F value
- $282,510,793
- Share change
- +4,618,346
- Put/Call ratio
- 34%
- SEC-reported price per share
- $4.42
- Number of holders
- 177
- Value change
- +$17,458,976
- Number of buys
- 111
- Number of sells
- 73
- Shares outstanding
- 125,375,197
Holder snapshot
7 signals
Open additional details 1 more signal available
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q1 2026
Institutions
177
Top holders
10
ASPI full security history
Ownership snapshot
Full 13F holder table
ASP Isotopes Inc. SEC filings
ASP Isotopes Inc. company facts
ASP Isotopes Inc. 13D/G history
Broader feeds
Ownership snapshot
Top reported holders of ASPI - ASP Isotopes Inc. - Common Stock (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
Paul Elliot Mann
Disclosed value leader
Paul Elliot Mann
Comparable rows
15/15
Latest evidence
31 Mar 2026
13D/G
13F
3/4/5
Lead comparable stake: 7%
13D/G row: Paul Elliot Mann
Showing 1-6 of 15 holder rows.
Quick read
Paul Elliot Mann leads the comparable SEC ownership view at 7%.
15 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens Paul Elliot Mann's linked filing trail.
Comparable ownership
Top 5
Paul Elliot Mann
7%
BlackRock, Inc.
6.6%
AK Jensen Investment Management Ltd
5.4%
Encompass Capital Advisors LLC
5.1%
BNP Paribas Asset Management UK Ltd
0.9%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-6 of 15 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Paul Elliot Mann |
13D/G
Mann Paul Elliot
|
7%
|
$58,118,940
7,759,538 shares
|
+$348,704 | 31 Dec 2025 |
| BlackRock, Inc. |
13D/G
13F
Company
|
6.6%
|
$36,574,452
8,274,763 shares
|
+$19,091,638 | 31 Mar 2026 |
| AK Jensen Investment Management Ltd |
13D/G
3/4/5
10%+ Owner
|
5.4%
|
$47,669,611
4,955,261 shares
|
+$2,373,350 | 30 Sep 2025 |
| Encompass Capital Advisors LLC |
13D/G
|
5.1%
|
$34,311,487
6,413,362 shares
|
$0 | 16 Jan 2026 |
| BNP Paribas Asset Management UK Ltd |
13D/G
|
0.9%
|
$7,073,002
944,326 shares
|
-$20,102,329 | 31 Dec 2025 |
| Duncan Moore |
3/4/5
Director
|
0.83%
|
$5,438,850
1,044,928 shares
|
-$756,829 | 12 Nov 2025 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
13F holder rows
Institutional holders as of Q1 2026
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
177
Shares
63,841,286
Rows available
177
| Investor | Option | Weight % | Change % | SEC-reported value | * Price | Shares | Share Change | Activity | Report Period |
|---|
* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.
Compare Q1 2026 vs Q1 2026 Across Filers
Q1 2026 holders
177
Q1 2026 holders
177
Holder diff
0
| Investor | Q1 2026 Shares | Q1 2026 Shares | Share Diff | Share Chg % | Q1 2026 value | Q1 2026 value | Value change | Value Chg % |
|---|