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 | n/a | −2 |
| Q3 2025 | 17 | 0 | 22.22M | $154.67M | +1 | −1 |
| Q2 2025 | 14 | +1 | 16.35M | $96.82M | +1 | n/a |
| 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 | n/a |
| Q2 2024 | 9 | n/a | 3.76M | $89.60M | n/a | n/a |
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 ↗ ×13 |
| 2 | The Vanguard Group ✦ (passive) | 4.69M | +3.9% | $13.26M | 0.0% | ▲ Add | 3 | SEC ↗ ×5 |
| 3 | Invesco Ltd. | 4.13M | n/a | $11.69M | 0.0% | n/c | 1 | SEC ↗ ×4 |
| 4 | State Street Global Advisors ✦ (passive) | 2.50M | +28.6% | $7.08M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 5 | Dimensional Fund Advisors Lp | 2.00M | n/a | $5.67M | 0.0% | n/c | 1 | SEC ↗ ×4 |
| 6 | Geode Capital Management ✦ (passive) | 1.60M | +1.1% | $4.53M | 0.0% | ▲ Add | 7 | SEC ↗ ×2 |
| 7 | JPMorgan Chase ✦ | 1.48M | -45.0% | $4.20M | 0.0% | ▼ Trim | 2 | SEC ↗ ×3 |
| 8 | Ameriprise Financial Inc | 1.38M | n/a | $3.90M | 0.0% | n/c | 1 | SEC ↗ ×2 |
| 9 | Goldman Sachs Group ✦ | 1.29M | -8.8% | $3.66M | 0.0% | ▼ Trim | 2 | SEC ↗ ×2 |
| 10 | American Century Companies Inc | 1.16M | n/a | $3.28M | 0.0% | n/c | 1 | SEC ↗ |
| 11 | Millennium Management ✦ | 870.95K | -39.8% | $2.46M | 0.0% | ▼ Trim | 7 | SEC ↗ |
| 12 | Citadel Advisors ✦ | 866.22K | -22.3% | $2.45M | 0.0% | ▼ Trim | 7 | SEC ↗ |
| 13 | Two Sigma Investments ✦ | 757.42K | -6.7% | $2.14M | 0.0% | ▼ Trim | 7 | SEC ↗ |
| 14 | Bank Of America Corp /De/ | 752.43K | n/a | $2.13M | 0.0% | n/c | 1 | SEC ↗ ×3 |
| 15 | Bnp Paribas Financial Markets | 691.27K | n/a | $1.96M | 0.0% | n/c | 1 | SEC ↗ |
| 16 | First Eagle Investment Management… | 622.49K | n/a | $1.76M | 0.0% | n/c | 1 | SEC ↗ ×2 |
| 17 | Federated Hermes, Inc. | 564.49K | n/a | $1.60M | 0.0% | n/c | 1 | SEC ↗ ×2 |
| 18 | Marshall Wace ✦ | 554.18K | +77.5% | $1.57M | 0.0% | ▲ Add | 7 | SEC ↗ ×3 |
| 19 | Charles Schwab Investment… | 540.32K | n/a | $1.53M | 0.0% | n/c | 1 | SEC ↗ |
| 20 | Northern Trust Corp | 539.17K | n/a | $1.53M | 0.0% | n/c | 1 | SEC ↗ ×6 |
| 21 | AQR Capital Management ✦ | 369.95K | +108.1% | $1.05M | 0.0% | ▲ Add | 4 | SEC ↗ ×4 |
| 22 | Morgan Stanley ✦ | 347.65K | -49.9% | $983,843 | 0.0% | ▼ Trim | 2 | SEC ↗ ×7 |
| 23 | UBS Group AG | 315.35K | n/a | $892,435 | 0.0% | n/c | 1 | SEC ↗ ×4 |
| 24 | Jane Street Group, Llc | 293.15K | n/a | $829,614 | 0.0% | n/c | 1 | SEC ↗ ×2 |
| 25 | Citigroup Inc | 238.63K | n/a | $675,326 | 0.0% | n/c | 1 | SEC ↗ ×2 |
| 26 | Deutsche Bank Ag\ | 223.09K | n/a | $631,353 | 0.0% | n/c | 1 | SEC ↗ ×3 |
| 27 | Bank of New York Mellon Corp | 196.90K | n/a | $557,236 | 0.0% | n/c | 1 | SEC ↗ ×5 |
| 28 | First Trust Advisors Lp | 196.57K | n/a | $556,281 | 0.0% | n/c | 1 | SEC ↗ |
| 29 | Susquehanna International Group, Llp | 191.20K | n/a | $541,107 | 0.0% | n/c | 1 | SEC ↗ ×2 |
| 30 | Healthcare Of Ontario Pension Plan… | 157.40K | n/a | $445,442 | 0.0% | n/c | 1 | SEC ↗ |
| 31 | Swiss National Bank | 135.20K | n/a | $382,616 | 0.0% | n/c | 1 | SEC ↗ |
| 32 | Mitsubishi UFJ Asset Management… | 131.47K | n/a | $379,943 | 0.0% | n/c | 1 | SEC ↗ |
| 33 | Nuveen, LLC | 133.87K | n/a | $378,843 | 0.0% | n/c | 1 | SEC ↗ ×2 |
| 34 | State Of Wisconsin Investment Board | 120.24K | n/a | $340,274 | 0.0% | n/c | 1 | SEC ↗ |
| 35 | Barclays Plc | 109.53K | n/a | $309,964 | 0.0% | n/c | 1 | SEC ↗ ×2 |
| 36 | IMC-Chicago, LLC | 102.93K | n/a | $291,292 | 0.0% | n/c | 1 | SEC ↗ |
| 37 | T. Rowe Price ✦ | 98.30K | +28.3% | $279,000 | 0.0% | ▲ Add | 7 | SEC ↗ |
| 38 | Assenagon Asset Management S.A. | 97.00K | n/a | $274,516 | 0.0% | n/c | 1 | SEC ↗ |
| 39 | Russell Investments Group, Ltd. | 95.65K | n/a | $270,690 | 0.0% | n/c | 1 | SEC ↗ ×5 |
| 40 | UBS AM, a distinct business unit of… | 94.59K | n/a | $267,687 | 0.0% | n/c | 1 | SEC ↗ |
| 41 | Rhumbline Advisers | 89.32K | n/a | $252,759 | 0.0% | n/c | 1 | SEC ↗ |
| 42 | Wells Fargo & Company/Mn | 82.17K | n/a | $232,541 | 0.0% | n/c | 1 | SEC ↗ ×3 |
| 43 | Tudor Investment Corp Et Al | 79.17K | n/a | $224,054 | 0.0% | n/c | 1 | SEC ↗ |
| 44 | California State Teachers… | 78.45K | n/a | $222,025 | 0.0% | n/c | 1 | SEC ↗ |
| 45 | Legal & General Group Plc | 67.13K | n/a | $189,977 | 0.0% | n/c | 1 | SEC ↗ ×3 |
| 46 | Alliancebernstein L.P. | 64.09K | n/a | $181,375 | 0.0% | n/c | 1 | SEC ↗ |
| 47 | LPL Financial LLC | 55.08K | n/a | $155,865 | 0.0% | n/c | 1 | SEC ↗ |
| 48 | Hsbc Holdings Plc | 46.65K | n/a | $132,026 | 0.0% | n/c | 1 | SEC ↗ ×2 |
| 49 | MIRAE ASSET GLOBAL ETFS HOLDINGS… | 30.80K | n/a | $87,161 | 0.0% | n/c | 1 | SEC ↗ |
| 50 | Janus Henderson Group Plc | 30.45K | n/a | $86,340 | 0.0% | n/c | 1 | SEC ↗ |
| 51 | D. E. Shaw & Co. ✦ | 23.22K | +75.6% | $65,704 | 0.0% | ▲ Add | 4 | SEC ↗ |
| 52 | Manufacturers Life Insurance… | 21.16K | n/a | $59,891 | 0.0% | n/c | 1 | SEC ↗ |
| 53 | New York State Common Retirement… | 16.23K | n/a | $45,934 | 0.0% | n/c | 1 | SEC ↗ |
| 54 | State Board Of Administration Of… | 14.62K | n/a | $41,369 | 0.0% | n/c | 1 | SEC ↗ |
| 55 | Group One Trading Llc | 14.26K | n/a | $40,347 | 0.0% | n/c | 1 | SEC ↗ |
| 56 | Voya Investment Management Llc | 12.36K | n/a | $34,976 | 0.0% | n/c | 1 | SEC ↗ |
| 57 | ProShare Advisors LLC | 12.12K | n/a | $34,294 | 0.0% | n/c | 1 | SEC ↗ |
| 58 | Canada Pension Plan Investment Board | 11.90K | n/a | $33,677 | 0.0% | n/c | 1 | SEC ↗ |
| 59 | Baird Financial Group, Inc. | 11.34K | n/a | $32,104 | 0.0% | n/c | 1 | SEC ↗ |
| 60 | Osaic Holdings, Inc. | 10.80K | n/a | $30,550 | 0.0% | n/c | 1 | SEC ↗ |
| 61 | Zurcher Kantonalbank (Zurich… | 10.70K | n/a | $30,289 | 0.0% | n/c | 1 | SEC ↗ |
| 62 | Optiver Holding B.V. | 6.05K | n/a | $17,110 | 0.0% | n/c | 1 | SEC ↗ |
| 63 | Fidelity (FMR) ✦ | 5.77K | -13.4% | $16,326 | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 64 | Simplex Trading, Llc | 4.83K | n/a | $13,674 | 0.0% | n/c | 1 | SEC ↗ |
| 65 | Royal Bank Of Canada | 4.35K | n/a | $13,000 | 0.0% | n/c | 1 | SEC ↗ ×3 |
| 66 | Cwm, Llc | 1.76K | n/a | $5,000 | 0.0% | n/c | 1 | SEC ↗ |
| 67 | Jones Financial Companies Lllp | 1.75K | n/a | $4,938 | 0.0% | n/c | 1 | SEC ↗ |
| 68 | Us Bancorp \De\ | 739 | n/a | $2,091 | 0.0% | n/c | 1 | SEC ↗ ×2 |
| 69 | National Bank Of Canada /Fi/ | 200 | n/a | $566 | 0.0% | n/c | 1 | SEC ↗ |
| 70 | Rockefeller Capital Management L.P. | 200 | n/a | $566 | 0.0% | n/c | 1 | SEC ↗ |
| 71 | Pnc Financial Services Group, Inc. | 56 | n/a | $158 | 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.
Open-market purchases (P)
No open-market insider purchases in our coverage window.
Open-market sales (S)
Sep 23
Wood River Capital, LLC
Other · 12.28M sh · $58.09M
Awards, exercises and tax withholding are never counted as buys or sales here. Methodology
Sep 24
SC 13D/A: Wood River Capital, LLC
Aug 13
SC 13G/A: NEEDHAM INVESTMENT MANAGEMENT LLC
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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