ASPN
Aspen Aerogels, Inc. · Basic Materials · Chemicals - Specialty
Momentum inputs (comparable managers): holder breadth 0.0% · share flow -5.0% · net new positions 0.0% — formula
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q1 2025
| 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 | — | — |
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | Millennium Management ✦ | 1.60M | -1.4% | $10.22M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 2 | Geode Capital Management ✦ (passive) | 1.52M | +3.5% | $9.69M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 3 | Geode Capital Management ✦ (passive) | 1.52M | +3.5% | $9.69M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 4 | State Street Global Advisors ✦ (passive) | 1.49M | +0.5% | $9.55M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 5 | Two Sigma Investments ✦ | 901.48K | +52.1% | $5.76M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 6 | Renaissance Technologies ✦ | 764.10K | -0.3% | $4.88M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 7 | Citadel Advisors ✦ | 577.76K | -7.4% | $3.69M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 8 | Citadel Advisors ✦ | 577.76K | -7.4% | $3.69M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 9 | Marshall Wace ✦ | 305.83K | +1146.8% | $1.95M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 10 | Marshall Wace ✦ | 305.83K | +1146.8% | $1.95M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 11 | AQR Capital Management ✦ | 150.19K | New | $959,689 | 0.0% | New | 1 | SEC ↗ |
| 12 | AQR Capital Management ✦ | 150.19K | New | $959,689 | 0.0% | New | 1 | SEC ↗ |
| 13 | AQR Capital Management ✦ | 150.19K | New | $959,689 | 0.0% | New | 1 | SEC ↗ |
| 14 | AQR Capital Management ✦ | 150.19K | New | $959,689 | 0.0% | New | 1 | SEC ↗ |
| 15 | AQR Capital Management ✦ | 150.19K | New | $959,689 | 0.0% | New | 1 | SEC ↗ |
| 16 | T. Rowe Price ✦ | 66.38K | +56.4% | $425,000 | 0.0% | ▲ Add | 4 | SEC ↗ |
| 17 | D. E. Shaw & Co. ✦ | 24.79K | New | $158,402 | 0.0% | New | 1 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value — the conviction measure. ✦ = curated manager.
New buyers
| AQR Capital Management | $959,689 | 0.0% |
| AQR Capital Management | $959,689 | 0.0% |
| AQR Capital Management | $959,689 | 0.0% |
| AQR Capital Management | $959,689 | 0.0% |
| AQR Capital Management | $959,689 | 0.0% |
| D. E. Shaw & Co. | $158,402 | 0.0% |
Exited
| Point72 Asset Management | $13.12M | was 0.0% |
| Wellington Management | $768,636 | 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.
What else this security's tracked holders most often hold — shared-ownership counts, not fundamental relationships.