Security record · archived quarter
ASPN
Aspen Aerogels, Inc. · Basic Materials · Chemicals - Specialty
75Tracked holders
+4Δ holders
32.71MShares held
$111.61MReported value
+13New positions
−9Exits
Momentum inputs (comparable managers):
holder breadth +5.6% ·
share flow -6.9% ·
net new positions +5.3%
— formula
Ownership fragmentation — more holders, smaller aggregate stake
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q1 2026
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 · Q1 2026
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | BlackRock ✦ (passive) | 4.74M | -3.8% | $16.22M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 2 | BlackRock ✦ (passive) | 4.74M | -3.8% | $16.22M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 3 | BlackRock ✦ (passive) | 4.74M | -3.8% | $16.22M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 4 | BlackRock ✦ (passive) | 4.74M | -3.8% | $16.22M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 5 | BlackRock ✦ (passive) | 4.74M | -3.8% | $16.22M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 6 | BlackRock ✦ (passive) | 4.74M | -3.8% | $16.22M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 7 | BlackRock ✦ (passive) | 4.74M | -3.8% | $16.22M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 8 | BlackRock ✦ (passive) | 4.74M | -3.8% | $16.22M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 9 | Vanguard Capital Management Llc | 3.44M | — | $11.75M | 0.0% | n/c | 1 | SEC ↗ |
| 10 | State Street Global Advisors ✦ (passive) | 2.32M | -7.2% | $7.94M | 0.0% | ▼ Trim | 6 | SEC ↗ |
| 11 | Invesco Ltd. | 2.30M | -44.4% | $7.86M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 12 | Invesco Ltd. | 2.30M | -44.4% | $7.86M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 13 | Invesco Ltd. | 2.30M | -44.4% | $7.86M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 14 | Geode Capital Management ✦ (passive) | 1.54M | -3.8% | $5.27M | 0.0% | ▼ Trim | 8 | SEC ↗ |
| 15 | Geode Capital Management ✦ (passive) | 1.54M | -3.8% | $5.27M | 0.0% | ▼ Trim | 8 | SEC ↗ |
| 16 | Ameriprise Financial Inc | 1.51M | +9.3% | $5.15M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 17 | Ameriprise Financial Inc | 1.51M | +9.3% | $5.15M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 18 | Millennium Management ✦ | 1.40M | +61.3% | $4.80M | 0.0% | ▲ Add | 8 | SEC ↗ |
| 19 | Marshall Wace ✦ | 1.26M | +127.9% | $4.32M | 0.0% | ▲ Add | 8 | SEC ↗ |
| 20 | Marshall Wace ✦ | 1.26M | +127.9% | $4.32M | 0.0% | ▲ Add | 8 | SEC ↗ |
| 21 | Marshall Wace ✦ | 1.26M | +127.9% | $4.32M | 0.0% | ▲ Add | 8 | SEC ↗ |
| 22 | Dimensional Fund Advisors Lp | 1.26M | -37.3% | $4.30M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 23 | Dimensional Fund Advisors Lp | 1.26M | -37.3% | $4.30M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 24 | Dimensional Fund Advisors Lp | 1.26M | -37.3% | $4.30M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 25 | Dimensional Fund Advisors Lp | 1.26M | -37.3% | $4.30M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 26 | American Century Companies Inc | 1.25M | +7.8% | $4.27M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 27 | Goldman Sachs Group ✦ | 899.51K | -30.5% | $3.08M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 28 | Goldman Sachs Group ✦ | 899.51K | -30.5% | $3.08M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 29 | JPMorgan Chase ✦ | 965.49K | -34.9% | $3.06M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 30 | JPMorgan Chase ✦ | 965.49K | -34.9% | $3.06M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 31 | Hrt Financial Lp | 870.43K | New | $2.98M | 0.0% | New | 1 | SEC ↗ |
| 32 | D. E. Shaw & Co. ✦ | 833.57K | +3490.3% | $2.85M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 33 | Bnp Paribas Financial Markets | 697.93K | +1.0% | $2.39M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 34 | Citadel Advisors ✦ | 581.19K | -32.9% | $1.99M | 0.0% | ▼ Trim | 8 | SEC ↗ |
| 35 | Charles Schwab Investment… | 556.73K | +3.0% | $1.90M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 36 | AQR Capital Management ✦ | 526.12K | +42.2% | $1.80M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 37 | AQR Capital Management ✦ | 526.12K | +42.2% | $1.80M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 38 | AQR Capital Management ✦ | 526.12K | +42.2% | $1.80M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 39 | AQR Capital Management ✦ | 526.12K | +42.2% | $1.80M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 40 | AQR Capital Management ✦ | 526.12K | +42.2% | $1.80M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 41 | AQR Capital Management ✦ | 526.12K | +42.2% | $1.80M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 42 | AQR Capital Management ✦ | 526.12K | +42.2% | $1.80M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 43 | Northern Trust Corp | 523.42K | -2.9% | $1.79M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 44 | Northern Trust Corp | 523.42K | -2.9% | $1.79M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 45 | Northern Trust Corp | 523.42K | -2.9% | $1.79M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 46 | Northern Trust Corp | 523.42K | -2.9% | $1.79M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 47 | Federated Hermes, Inc. | 450.04K | -20.3% | $1.54M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 48 | Federated Hermes, Inc. | 450.04K | -20.3% | $1.54M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 49 | Two Sigma Investments ✦ | 441.44K | -41.7% | $1.51M | 0.0% | ▼ Trim | 8 | SEC ↗ |
| 50 | Deutsche Bank Ag\ | 359.54K | +61.2% | $1.23M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 51 | Deutsche Bank Ag\ | 359.54K | +61.2% | $1.23M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 52 | Deutsche Bank Ag\ | 359.54K | +61.2% | $1.23M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 53 | Susquehanna International Group, Llp | 274.32K | +43.5% | $938,164 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 54 | Point72 Asset Management ✦ | 256.61K | New | $877,620 | 0.0% | New | 1 | SEC ↗ |
| 55 | Bank Of America Corp /De/ | 241.02K | -68.0% | $824,288 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 56 | Bank Of America Corp /De/ | 241.02K | -68.0% | $824,288 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 57 | Citigroup Inc | 233.66K | -2.1% | $799,134 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 58 | Citigroup Inc | 233.66K | -2.1% | $799,134 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 59 | UBS Group AG | 189.23K | -40.0% | $647,163 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 60 | UBS Group AG | 189.23K | -40.0% | $647,163 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 61 | UBS Group AG | 189.23K | -40.0% | $647,163 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 62 | Morgan Stanley ✦ | 188.31K | -45.8% | $644,006 | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 63 | Morgan Stanley ✦ | 188.31K | -45.8% | $644,006 | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 64 | Morgan Stanley ✦ | 188.31K | -45.8% | $644,006 | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 65 | Morgan Stanley ✦ | 188.31K | -45.8% | $644,006 | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 66 | Morgan Stanley ✦ | 188.31K | -45.8% | $644,006 | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 67 | Morgan Stanley ✦ | 188.31K | -45.8% | $644,006 | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 68 | Morgan Stanley ✦ | 188.31K | -45.8% | $644,006 | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 69 | Jane Street Group, Llc | 187.86K | -35.9% | $642,482 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 70 | Jane Street Group, Llc | 187.86K | -35.9% | $642,482 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 71 | Jane Street Group, Llc | 187.86K | -35.9% | $642,482 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 72 | Bank of New York Mellon Corp | 185.67K | -5.7% | $635,002 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 73 | Bank of New York Mellon Corp | 185.67K | -5.7% | $635,002 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 74 | Bank of New York Mellon Corp | 185.67K | -5.7% | $635,002 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 75 | Bank of New York Mellon Corp | 185.67K | -5.7% | $635,002 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 76 | First Trust Advisors Lp | 181.23K | -7.8% | $619,820 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 77 | Healthcare Of Ontario Pension Plan… | 157.40K | 0.0% | $538,308 | 0.0% | Held | 2 | SEC ↗ |
| 78 | Tudor Investment Corp Et Al | 151.09K | +90.8% | $516,738 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 79 | Balyasny Asset Management L.P. | 149.37K | New | $510,856 | 0.0% | New | 1 | SEC ↗ |
| 80 | Man Group plc | 143.32K | New | $490,161 | 0.0% | New | 1 | SEC ↗ |
| 81 | Lazard Asset Management Llc | 141.75K | New | $484,768 | 0.0% | New | 1 | SEC ↗ |
| 82 | Nuveen, LLC | 134.67K | +0.6% | $460,561 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 83 | Nuveen, LLC | 134.67K | +0.6% | $460,561 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 84 | Mitsubishi UFJ Asset Management… | 127.48K | -3.0% | $435,982 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 85 | Russell Investments Group, Ltd. | 114.39K | +19.6% | $391,198 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 86 | Russell Investments Group, Ltd. | 114.39K | +19.6% | $391,198 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 87 | Russell Investments Group, Ltd. | 114.39K | +19.6% | $391,198 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 88 | Russell Investments Group, Ltd. | 114.39K | +19.6% | $391,198 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 89 | Russell Investments Group, Ltd. | 114.39K | +19.6% | $391,198 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 90 | Russell Investments Group, Ltd. | 114.39K | +19.6% | $391,198 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 91 | T. Rowe Price ✦ | 107.30K | +9.2% | $367,000 | 0.0% | ▲ Add | 8 | SEC ↗ |
| 92 | Hsbc Holdings Plc | 104.98K | +125.0% | $359,072 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 93 | Hsbc Holdings Plc | 104.98K | +125.0% | $359,072 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 94 | State Of Wisconsin Investment Board | 102.68K | -14.6% | $351,152 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 95 | Rhumbline Advisers | 84.00K | -6.0% | $287,266 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 96 | Franklin Resources Inc | 63.04K | New | $215,587 | 0.0% | New | 1 | SEC ↗ |
| 97 | Squarepoint Ops LLC | 59.75K | New | $204,352 | 0.0% | New | 1 | SEC ↗ |
| 98 | Alliancebernstein L.P. | 64.09K | 0.0% | $181,375 | 0.0% | Held | 2 | SEC ↗ |
| 99 | LPL Financial LLC | 38.85K | -29.5% | $132,864 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 100 | MIRAE ASSET GLOBAL ETFS HOLDINGS… | 31.55K | +2.4% | $107,891 | 0.0% | ▲ Add | 2 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value — the conviction measure. ✦ = curated manager.
New buyers
| Hrt Financial Lp | $2.98M | 0.0% |
| Point72 Asset Management | $877,620 | 0.0% |
| Balyasny Asset Management L.P. | $510,856 | 0.0% |
| Man Group plc | $490,161 | 0.0% |
| Lazard Asset Management Llc | $484,768 | 0.0% |
| Franklin Resources Inc | $215,587 | 0.0% |
| Squarepoint Ops LLC | $204,352 | 0.0% |
Exited
| First Eagle Investment… | $1.76M | was 0.0% |
| Swiss National Bank | $382,616 | was 0.0% |
| Assenagon Asset Management… | $274,516 | was 0.0% |
| UBS AM, a distinct business… | $267,687 | was 0.0% |
| Janus Henderson Group Plc | $86,340 | was 0.0% |
| Group One Trading Llc | $40,347 | was 0.0% |
| ProShare Advisors LLC | $34,294 | was 0.0% |
| Baird Financial Group, Inc. | $32,104 | was 0.0% |
| Zurcher Kantonalbank (Zurich… | $30,289 | 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: Q1 2026 ·
Methodology ·
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