Security record · archived quarter
ASPN
Aspen Aerogels, Inc. · Basic Materials · Chemicals - Specialty
71Tracked holders
-2Δ holders
36.38MShares held
$102.97MReported value
+0New positions
−2Exits
Momentum inputs (comparable managers):
holder breadth -2.7% ·
share flow -4.8% ·
net new positions -2.8%
— formula
Broad distribution — falling shares and 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 | 76 | +3 | 36.34M | $229.77M | +8 | −5 |
| Q1 2026 | 75 | +4 | 32.71M | $111.61M | +13 | −9 |
| Q4 2025 | 71 | -2 | 36.38M | $102.97M | — | −2 |
| Q3 2025 | 17 | 0 | 22.22M | $154.67M | +1 | −1 |
| Q2 2025 | 14 | +1 | 16.35M | $96.82M | +1 | — |
| Q1 2025 | 10 | 0 | 7.40M | $47.29M | +2 | −2 |
| Q4 2024 | 10 | -2 | 7.79M | $92.59M | +1 | −3 |
| Q3 2024 | 11 | +2 | 2.29M | $63.46M | +2 | — |
| Q2 2024 | 9 | — | 3.76M | $89.60M | — | — |
Who holds it · Q4 2025
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | BlackRock ✦ (passive) | 4.93M | -1.0% | $13.95M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 2 | BlackRock ✦ (passive) | 4.93M | -1.0% | $13.95M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 3 | BlackRock ✦ (passive) | 4.93M | -1.0% | $13.95M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 4 | BlackRock ✦ (passive) | 4.93M | -1.0% | $13.95M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 5 | BlackRock ✦ (passive) | 4.93M | -1.0% | $13.95M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 6 | BlackRock ✦ (passive) | 4.93M | -1.0% | $13.95M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 7 | BlackRock ✦ (passive) | 4.93M | -1.0% | $13.95M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 8 | BlackRock ✦ (passive) | 4.93M | -1.0% | $13.95M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 9 | BlackRock ✦ (passive) | 4.93M | -1.0% | $13.95M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 10 | BlackRock ✦ (passive) | 4.93M | -1.0% | $13.95M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 11 | BlackRock ✦ (passive) | 4.93M | -1.0% | $13.95M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 12 | BlackRock ✦ (passive) | 4.93M | -1.0% | $13.95M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 13 | BlackRock ✦ (passive) | 4.93M | -1.0% | $13.95M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 14 | The Vanguard Group ✦ (passive) | 4.69M | +3.9% | $13.26M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 15 | The Vanguard Group ✦ (passive) | 4.69M | +3.9% | $13.26M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 16 | The Vanguard Group ✦ (passive) | 4.69M | +3.9% | $13.26M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 17 | The Vanguard Group ✦ (passive) | 4.69M | +3.9% | $13.26M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 18 | The Vanguard Group ✦ (passive) | 4.69M | +3.9% | $13.26M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 19 | Invesco Ltd. | 4.13M | — | $11.69M | 0.0% | n/c | 1 | SEC ↗ |
| 20 | Invesco Ltd. | 4.13M | — | $11.69M | 0.0% | n/c | 1 | SEC ↗ |
| 21 | Invesco Ltd. | 4.13M | — | $11.69M | 0.0% | n/c | 1 | SEC ↗ |
| 22 | Invesco Ltd. | 4.13M | — | $11.69M | 0.0% | n/c | 1 | SEC ↗ |
| 23 | State Street Global Advisors ✦ (passive) | 2.50M | +28.6% | $7.08M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 24 | Dimensional Fund Advisors Lp | 2.00M | — | $5.67M | 0.0% | n/c | 1 | SEC ↗ |
| 25 | Dimensional Fund Advisors Lp | 2.00M | — | $5.67M | 0.0% | n/c | 1 | SEC ↗ |
| 26 | Dimensional Fund Advisors Lp | 2.00M | — | $5.67M | 0.0% | n/c | 1 | SEC ↗ |
| 27 | Dimensional Fund Advisors Lp | 2.00M | — | $5.67M | 0.0% | n/c | 1 | SEC ↗ |
| 28 | Geode Capital Management ✦ (passive) | 1.60M | +1.1% | $4.53M | 0.0% | ▲ Add | 7 | SEC ↗ |
| 29 | Geode Capital Management ✦ (passive) | 1.60M | +1.1% | $4.53M | 0.0% | ▲ Add | 7 | SEC ↗ |
| 30 | JPMorgan Chase ✦ | 1.48M | -45.0% | $4.20M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 31 | JPMorgan Chase ✦ | 1.48M | -45.0% | $4.20M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 32 | JPMorgan Chase ✦ | 1.48M | -45.0% | $4.20M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 33 | Ameriprise Financial Inc | 1.38M | — | $3.90M | 0.0% | n/c | 1 | SEC ↗ |
| 34 | Ameriprise Financial Inc | 1.38M | — | $3.90M | 0.0% | n/c | 1 | SEC ↗ |
| 35 | Goldman Sachs Group ✦ | 1.29M | -8.8% | $3.66M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 36 | Goldman Sachs Group ✦ | 1.29M | -8.8% | $3.66M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 37 | American Century Companies Inc | 1.16M | — | $3.28M | 0.0% | n/c | 1 | SEC ↗ |
| 38 | Millennium Management ✦ | 870.95K | -39.8% | $2.46M | 0.0% | ▼ Trim | 7 | SEC ↗ |
| 39 | Citadel Advisors ✦ | 866.22K | -22.3% | $2.45M | 0.0% | ▼ Trim | 7 | SEC ↗ |
| 40 | Two Sigma Investments ✦ | 757.42K | -6.7% | $2.14M | 0.0% | ▼ Trim | 7 | SEC ↗ |
| 41 | Bank Of America Corp /De/ | 752.43K | — | $2.13M | 0.0% | n/c | 1 | SEC ↗ |
| 42 | Bank Of America Corp /De/ | 752.43K | — | $2.13M | 0.0% | n/c | 1 | SEC ↗ |
| 43 | Bank Of America Corp /De/ | 752.43K | — | $2.13M | 0.0% | n/c | 1 | SEC ↗ |
| 44 | Bnp Paribas Financial Markets | 691.27K | — | $1.96M | 0.0% | n/c | 1 | SEC ↗ |
| 45 | First Eagle Investment Management… | 622.49K | — | $1.76M | 0.0% | n/c | 1 | SEC ↗ |
| 46 | First Eagle Investment Management… | 622.49K | — | $1.76M | 0.0% | n/c | 1 | SEC ↗ |
| 47 | Federated Hermes, Inc. | 564.49K | — | $1.60M | 0.0% | n/c | 1 | SEC ↗ |
| 48 | Federated Hermes, Inc. | 564.49K | — | $1.60M | 0.0% | n/c | 1 | SEC ↗ |
| 49 | Marshall Wace ✦ | 554.18K | +77.5% | $1.57M | 0.0% | ▲ Add | 7 | SEC ↗ |
| 50 | Marshall Wace ✦ | 554.18K | +77.5% | $1.57M | 0.0% | ▲ Add | 7 | SEC ↗ |
| 51 | Marshall Wace ✦ | 554.18K | +77.5% | $1.57M | 0.0% | ▲ Add | 7 | SEC ↗ |
| 52 | Charles Schwab Investment… | 540.32K | — | $1.53M | 0.0% | n/c | 1 | SEC ↗ |
| 53 | Northern Trust Corp | 539.17K | — | $1.53M | 0.0% | n/c | 1 | SEC ↗ |
| 54 | Northern Trust Corp | 539.17K | — | $1.53M | 0.0% | n/c | 1 | SEC ↗ |
| 55 | Northern Trust Corp | 539.17K | — | $1.53M | 0.0% | n/c | 1 | SEC ↗ |
| 56 | Northern Trust Corp | 539.17K | — | $1.53M | 0.0% | n/c | 1 | SEC ↗ |
| 57 | Northern Trust Corp | 539.17K | — | $1.53M | 0.0% | n/c | 1 | SEC ↗ |
| 58 | Northern Trust Corp | 539.17K | — | $1.53M | 0.0% | n/c | 1 | SEC ↗ |
| 59 | AQR Capital Management ✦ | 369.95K | +108.1% | $1.05M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 60 | AQR Capital Management ✦ | 369.95K | +108.1% | $1.05M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 61 | AQR Capital Management ✦ | 369.95K | +108.1% | $1.05M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 62 | AQR Capital Management ✦ | 369.95K | +108.1% | $1.05M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 63 | Morgan Stanley ✦ | 347.65K | -49.9% | $983,843 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 64 | Morgan Stanley ✦ | 347.65K | -49.9% | $983,843 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 65 | Morgan Stanley ✦ | 347.65K | -49.9% | $983,843 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 66 | Morgan Stanley ✦ | 347.65K | -49.9% | $983,843 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 67 | Morgan Stanley ✦ | 347.65K | -49.9% | $983,843 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 68 | Morgan Stanley ✦ | 347.65K | -49.9% | $983,843 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 69 | Morgan Stanley ✦ | 347.65K | -49.9% | $983,843 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 70 | UBS Group AG | 315.35K | — | $892,435 | 0.0% | n/c | 1 | SEC ↗ |
| 71 | UBS Group AG | 315.35K | — | $892,435 | 0.0% | n/c | 1 | SEC ↗ |
| 72 | UBS Group AG | 315.35K | — | $892,435 | 0.0% | n/c | 1 | SEC ↗ |
| 73 | UBS Group AG | 315.35K | — | $892,435 | 0.0% | n/c | 1 | SEC ↗ |
| 74 | Jane Street Group, Llc | 293.15K | — | $829,614 | 0.0% | n/c | 1 | SEC ↗ |
| 75 | Jane Street Group, Llc | 293.15K | — | $829,614 | 0.0% | n/c | 1 | SEC ↗ |
| 76 | Citigroup Inc | 238.63K | — | $675,326 | 0.0% | n/c | 1 | SEC ↗ |
| 77 | Citigroup Inc | 238.63K | — | $675,326 | 0.0% | n/c | 1 | SEC ↗ |
| 78 | Deutsche Bank Ag\ | 223.09K | — | $631,353 | 0.0% | n/c | 1 | SEC ↗ |
| 79 | Deutsche Bank Ag\ | 223.09K | — | $631,353 | 0.0% | n/c | 1 | SEC ↗ |
| 80 | Deutsche Bank Ag\ | 223.09K | — | $631,353 | 0.0% | n/c | 1 | SEC ↗ |
| 81 | Bank of New York Mellon Corp | 196.90K | — | $557,236 | 0.0% | n/c | 1 | SEC ↗ |
| 82 | Bank of New York Mellon Corp | 196.90K | — | $557,236 | 0.0% | n/c | 1 | SEC ↗ |
| 83 | Bank of New York Mellon Corp | 196.90K | — | $557,236 | 0.0% | n/c | 1 | SEC ↗ |
| 84 | Bank of New York Mellon Corp | 196.90K | — | $557,236 | 0.0% | n/c | 1 | SEC ↗ |
| 85 | Bank of New York Mellon Corp | 196.90K | — | $557,236 | 0.0% | n/c | 1 | SEC ↗ |
| 86 | First Trust Advisors Lp | 196.57K | — | $556,281 | 0.0% | n/c | 1 | SEC ↗ |
| 87 | Susquehanna International Group, Llp | 191.20K | — | $541,107 | 0.0% | n/c | 1 | SEC ↗ |
| 88 | Susquehanna International Group, Llp | 191.20K | — | $541,107 | 0.0% | n/c | 1 | SEC ↗ |
| 89 | Healthcare Of Ontario Pension Plan… | 157.40K | — | $445,442 | 0.0% | n/c | 1 | SEC ↗ |
| 90 | Swiss National Bank | 135.20K | — | $382,616 | 0.0% | n/c | 1 | SEC ↗ |
| 91 | Mitsubishi UFJ Asset Management… | 131.47K | — | $379,943 | 0.0% | n/c | 1 | SEC ↗ |
| 92 | Nuveen, LLC | 133.87K | — | $378,843 | 0.0% | n/c | 1 | SEC ↗ |
| 93 | Nuveen, LLC | 133.87K | — | $378,843 | 0.0% | n/c | 1 | SEC ↗ |
| 94 | State Of Wisconsin Investment Board | 120.24K | — | $340,274 | 0.0% | n/c | 1 | SEC ↗ |
| 95 | Barclays Plc | 109.53K | — | $309,964 | 0.0% | n/c | 1 | SEC ↗ |
| 96 | Barclays Plc | 109.53K | — | $309,964 | 0.0% | n/c | 1 | SEC ↗ |
| 97 | IMC-Chicago, LLC | 102.93K | — | $291,292 | 0.0% | n/c | 1 | SEC ↗ |
| 98 | T. Rowe Price ✦ | 98.30K | +28.3% | $279,000 | 0.0% | ▲ Add | 7 | SEC ↗ |
| 99 | Assenagon Asset Management S.A. | 97.00K | — | $274,516 | 0.0% | n/c | 1 | SEC ↗ |
| 100 | Russell Investments Group, Ltd. | 95.65K | — | $270,690 | 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
| No new tracked buyers this quarter. |
Exited
| Renaissance Technologies | $1.72M | was 0.0% |
| Point72 Asset Management | $1.28M | was 0.0% |
Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 164 holders, 68.34M shares, $229.58M 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.
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 ·
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