Security record · archived quarter
ASPI
ASP Isotopes Inc. Common Stock · Basic Materials · Chemicals
73Tracked holders
-2Δ holders
41.79MShares held
$223.56MReported value
+1New positions
−3Exits
Momentum inputs (comparable managers):
holder breadth -2.7% ·
share flow +12.4% ·
net new positions -2.7%
— formula
Concentrated accumulation — rising shares among fewer holders
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q4 2025
Ownership over time
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q2 2026 | 73 | +3 | 40.98M | $254.70M | +8 | −5 |
| Q1 2026 | 73 | 0 | 37.51M | $165.79M | +5 | −5 |
| Q4 2025 | 73 | -2 | 41.79M | $223.56M | +1 | −3 |
| Q3 2025 | 16 | +2 | 19.49M | $187.45M | +2 | — |
| Q2 2025 | 11 | +1 | 10.37M | $76.34M | +1 | — |
| Q1 2025 | 7 | 0 | 2.75M | $12.89M | — | — |
| Q4 2024 | 7 | +2 | 2.85M | $12.93M | +2 | — |
| Q3 2024 | 4 | 0 | 2.17M | $6.03M | +1 | −1 |
| Q2 2024 | 4 | — | 1.51M | $4.59M | — | — |
Who holds it · Q4 2025
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | BlackRock ✦ (passive) | 6.79M | +24.3% | $36.32M | 0.0% | ▲ Add | 3 | SEC ↗ ×8 |
| 2 | The Vanguard Group ✦ (passive) | 6.41M | +41.8% | $34.27M | 0.0% | ▲ Add | 3 | SEC ↗ ×5 |
| 3 | Alyeska Investment Group, L.P. | 4.90M | — | $26.19M | 0.1% | n/c | 1 | SEC ↗ |
| 4 | UBS Group AG | 2.41M | — | $12.87M | 0.0% | n/c | 1 | SEC ↗ ×4 |
| 5 | Geode Capital Management ✦ (passive) | 2.38M | +28.0% | $12.76M | 0.0% | ▲ Add | 7 | SEC ↗ ×2 |
| 6 | State Street Global Advisors ✦ (passive) | 1.84M | +31.2% | $9.87M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 7 | Citadel Advisors ✦ | 1.73M | +48.0% | $9.23M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 8 | Goldman Sachs Group ✦ | 1.72M | +319.6% | $9.18M | 0.0% | ▲ Add | 2 | SEC ↗ ×2 |
| 9 | Morgan Stanley ✦ | 1.71M | +288.8% | $9.15M | 0.0% | ▲ Add | 2 | SEC ↗ ×8 |
| 10 | Jane Street Group, Llc | 1.59M | — | $8.49M | 0.0% | n/c | 1 | SEC ↗ ×2 |
| 11 | Susquehanna International Group, Llp | 1.52M | — | $8.11M | 0.0% | n/c | 1 | SEC ↗ |
| 12 | BNP Paribas Asset Management… | 944.33K | — | $5.05M | 0.0% | n/c | 1 | SEC ↗ |
| 13 | Charles Schwab Investment… | 885.74K | — | $4.74M | 0.0% | n/c | 1 | SEC ↗ |
| 14 | Marshall Wace ✦ | 818.13K | -36.0% | $4.38M | 0.0% | ▼ Trim | 7 | SEC ↗ ×2 |
| 15 | Northern Trust Corp | 745.91K | — | $3.99M | 0.0% | n/c | 1 | SEC ↗ ×4 |
| 16 | Barclays Plc | 506.79K | — | $2.71M | 0.0% | n/c | 1 | SEC ↗ ×3 |
| 17 | Group One Trading Llc | 444.35K | — | $2.38M | 0.1% | n/c | 1 | SEC ↗ |
| 18 | Pacer Advisors, Inc. | 404.37K | — | $2.16M | 0.0% | n/c | 1 | SEC ↗ |
| 19 | Two Sigma Investments ✦ | 356.24K | +5.6% | $1.91M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 20 | IMC-Chicago, LLC | 294.50K | — | $1.58M | 0.0% | n/c | 1 | SEC ↗ |
| 21 | Bank of New York Mellon Corp | 243.99K | — | $1.31M | 0.0% | n/c | 1 | SEC ↗ ×5 |
| 22 | Bank Of America Corp /De/ | 230.86K | — | $1.24M | 0.0% | n/c | 1 | SEC ↗ ×3 |
| 23 | Swiss National Bank | 210.10K | — | $1.12M | 0.0% | n/c | 1 | SEC ↗ |
| 24 | JPMorgan Chase ✦ | 194.48K | -74.0% | $1.04M | 0.0% | ▼ Trim | 2 | SEC ↗ ×3 |
| 25 | Nuveen, LLC | 182.72K | — | $977,579 | 0.0% | n/c | 1 | SEC ↗ ×2 |
| 26 | Russell Investments Group, Ltd. | 145.46K | — | $778,225 | 0.0% | n/c | 1 | SEC ↗ ×5 |
| 27 | Tudor Investment Corp Et Al | 132.94K | — | $711,208 | 0.0% | n/c | 1 | SEC ↗ |
| 28 | Wells Fargo & Company/Mn | 131.67K | — | $704,440 | 0.0% | n/c | 1 | SEC ↗ ×2 |
| 29 | Bank Of Montreal /Can/ | 117.89K | — | $630,690 | 0.0% | n/c | 1 | SEC ↗ ×2 |
| 30 | Stifel Financial Corp | 109.85K | — | $587,714 | 0.0% | n/c | 1 | SEC ↗ ×2 |
| 31 | UBS AM, a distinct business unit of… | 102.38K | — | $547,712 | 0.0% | n/c | 1 | SEC ↗ ×4 |
| 32 | Rhumbline Advisers | 101.54K | — | $543,216 | 0.0% | n/c | 1 | SEC ↗ |
| 33 | Simplex Trading, Llc | 93.72K | — | $501,380 | 0.0% | n/c | 1 | SEC ↗ |
| 34 | Balyasny Asset Management L.P. | 80.53K | — | $430,820 | 0.0% | n/c | 1 | SEC ↗ ×2 |
| 35 | California State Teachers… | 77.21K | — | $413,063 | 0.0% | n/c | 1 | SEC ↗ |
| 36 | Sei Investments Co | 77.00K | — | $411,971 | 0.0% | n/c | 1 | SEC ↗ |
| 37 | Legal & General Group Plc | 76.51K | — | $409,334 | 0.0% | n/c | 1 | SEC ↗ ×3 |
| 38 | Citigroup Inc | 75.35K | — | $403,134 | 0.0% | n/c | 1 | SEC ↗ ×2 |
| 39 | Cetera Investment Advisers | 71.31K | — | $381,493 | 0.0% | n/c | 1 | SEC ↗ |
| 40 | Deutsche Bank Ag\ | 68.62K | — | $367,117 | 0.0% | n/c | 1 | SEC ↗ ×2 |
| 41 | National Bank Of Canada /Fi/ | 62.40K | — | $333,192 | 0.0% | n/c | 1 | SEC ↗ |
| 42 | Invesco Ltd. | 59.55K | — | $318,608 | 0.0% | n/c | 1 | SEC ↗ ×4 |
| 43 | Quantinno Capital Management LP | 56.78K | — | $303,752 | 0.0% | n/c | 1 | SEC ↗ |
| 44 | D. E. Shaw & Co. ✦ | 54.04K | New | $289,098 | 0.0% | New | 1 | SEC ↗ |
| 45 | Osaic Holdings, Inc. | 50.69K | — | $271,170 | 0.0% | n/c | 1 | SEC ↗ ×2 |
| 46 | T. Rowe Price ✦ | 49.04K | -95.3% | $263,000 | 0.0% | ▼ Trim | 7 | SEC ↗ |
| 47 | LPL Financial LLC | 47.60K | — | $254,660 | 0.0% | n/c | 1 | SEC ↗ |
| 48 | Commonwealth Equity Services, Llc | 44.90K | — | $240,210 | 0.0% | n/c | 1 | SEC ↗ |
| 49 | MIRAE ASSET GLOBAL ETFS HOLDINGS… | 42.94K | — | $229,729 | 0.0% | n/c | 1 | SEC ↗ |
| 50 | Janus Henderson Group Plc | 39.00K | — | $208,455 | 0.0% | n/c | 1 | SEC ↗ |
| 51 | Royal Bank Of Canada | 32.05K | — | $172,000 | 0.0% | n/c | 1 | SEC ↗ ×5 |
| 52 | Raymond James Financial Inc | 29.57K | — | $158,178 | 0.0% | n/c | 1 | SEC ↗ ×2 |
| 53 | AQR Capital Management ✦ | 29.36K | -91.0% | $157,055 | 0.0% | ▼ Trim | 6 | SEC ↗ ×3 |
| 54 | Manufacturers Life Insurance… | 28.03K | — | $149,977 | 0.0% | n/c | 1 | SEC ↗ |
| 55 | Squarepoint Ops LLC | 27.48K | — | $147,023 | 0.0% | n/c | 1 | SEC ↗ |
| 56 | Mercer Global Advisors Inc /Adv | 25.55K | — | $136,693 | 0.0% | n/c | 1 | SEC ↗ |
| 57 | Zurcher Kantonalbank (Zurich… | 23.60K | — | $126,260 | 0.0% | n/c | 1 | SEC ↗ |
| 58 | Neuberger Berman Group LLC | 21.43K | — | $114,634 | 0.0% | n/c | 1 | SEC ↗ |
| 59 | Bnp Paribas Financial Markets | 20.07K | — | $107,369 | 0.0% | n/c | 1 | SEC ↗ |
| 60 | Peak6 Llc | 18.56K | — | $99,296 | 0.0% | n/c | 1 | SEC ↗ ×2 |
| 61 | ProShare Advisors LLC | 16.90K | — | $90,437 | 0.0% | n/c | 1 | SEC ↗ |
| 62 | Voya Investment Management Llc | 16.12K | — | $86,253 | 0.0% | n/c | 1 | SEC ↗ |
| 63 | Mml Investors Services, Llc | 14.59K | — | $78,035 | 0.0% | n/c | 1 | SEC ↗ |
| 64 | New York State Common Retirement… | 14.30K | — | $76,505 | 0.0% | n/c | 1 | SEC ↗ |
| 65 | Fidelity (FMR) ✦ | 12.71K | -0.1% | $67,996 | 0.0% | ▼ Trim | 3 | SEC ↗ ×2 |
| 66 | Pictet Asset Management Holding SA | 11.33K | — | $60,637 | 0.0% | n/c | 1 | SEC ↗ |
| 67 | Victory Capital Management Inc | 11.23K | — | $60,102 | 0.0% | n/c | 1 | SEC ↗ |
| 68 | Creative Planning | 10.43K | — | $55,795 | 0.0% | n/c | 1 | SEC ↗ |
| 69 | Jones Financial Companies Lllp | 4.88K | — | $26,124 | 0.0% | n/c | 1 | SEC ↗ |
| 70 | Rockefeller Capital Management L.P. | 4.12K | — | $22,047 | 0.0% | n/c | 1 | SEC ↗ |
| 71 | Cwm, Llc | 921 | — | $5,000 | 0.0% | n/c | 1 | SEC ↗ |
| 72 | Optiver Holding B.V. | 409 | — | $2,188 | 0.0% | n/c | 1 | SEC ↗ |
| 73 | Pnc Financial Services Group, Inc. | 93 | — | $498 | 0.0% | n/c | 1 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value — the conviction measure. ✦ = curated manager.
New buyers
| D. E. Shaw & Co. | $289,098 | 0.0% |
Exited
| Millennium Management | $2.37M | was 0.0% |
| Renaissance Technologies | $1.94M | was 0.0% |
| Point72 Asset Management | $224,828 | was 0.0% |
Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 175 holders, 63.06M shares, $277.19M reported. This is a different, older period than the tracked-universe figures above and the two are never mixed.
Frequently co-owned
What else this security's tracked holders most often hold — shared-ownership counts, not fundamental relationships.
Open-market purchases (P)
Sep 30
Ryan Robert John Andrew
Director · 15.00K sh @ 2.68 · $40,200
Sep 28
Ryan Robert John Andrew
Director · 8.00K sh @ 2.70 · $21,600
Open-market sales (S)
Sep 08
Ainscow Robert
Officer · 8.44K sh · $36,216
Sep 04
Mann Paul Elliot
Officer, Director · 83.76K sh · $343,412
Sep 03
Mann Paul Elliot
Officer, Director · 83.76K sh · $328,331
Sep 02
Ainscow Donald George
Officer · 23.68K sh · $92,107
Sep 02
Ainscow Robert
Officer · 25.00K sh · $97,625
Sep 02
Mann Paul Elliot
Officer, Director · 83.76K sh · $327,494
Awards, exercises and tax withholding are never counted as buys or sales here. Methodology
Provenance: Ownership from parsed 13F common-stock positions (tracked universe, comparable sets for changes); insider rows from Forms 3/4/5; stakes from Schedules 13D/13G; every filing links to its original on SEC EDGAR.
Reporting period: Q4 2025 ·
Methodology ·
Get this via the API