ASPN
Aspen Aerogels, Inc. · Basic Materials · Chemicals - Specialty
Momentum inputs (comparable managers):
holder breadth -16.7% ·
share flow +30.0% ·
net new positions -20.0%
· formula
Concentrated accumulation: rising shares among fewer holders
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q4 2024
| 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 |
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | Millennium Management ✦ | 1.62M | +4757.8% | $19.27M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 2 | State Street Global Advisors ✦ (passive) | 1.49M | n/a | $17.67M | 0.0% | n/c | 1 | SEC ↗ |
| 3 | Geode Capital Management ✦ (passive) | 1.46M | +5.6% | $17.40M | 0.0% | ▲ Add | 3 | SEC ↗ ×2 |
| 4 | Point72 Asset Management ✦ | 1.10M | New | $13.12M | 0.0% | New | 1 | SEC ↗ |
| 5 | Renaissance Technologies ✦ | 766.40K | +472.4% | $9.10M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 6 | Citadel Advisors ✦ | 624.23K | +56.9% | $7.42M | 0.0% | ▲ Add | 3 | SEC ↗ ×2 |
| 7 | Two Sigma Investments ✦ | 592.76K | +638.0% | $7.04M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 8 | Wellington Management ✦ | 64.70K | -57.0% | $768,636 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 9 | T. Rowe Price ✦ | 42.45K | +38.0% | $505,000 | 0.0% | ▲ Add | 3 | SEC ↗ |
| 10 | Marshall Wace ✦ | 24.53K | -21.1% | $291,417 | 0.0% | ▼ Trim | 3 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value: the conviction measure. ✦ = curated manager.
New buyers
| Point72 Asset Management | $13.12M | 0.0% |
Exited
| D. E. Shaw & Co. | $622,056 | was 0.0% |
| AQR Capital Management | $405,907 | was 0.0% |
| Gotham Asset Management | $293,680 | 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.
Open-market purchases (P)
No open-market insider purchases in our coverage window.
Open-market sales (S)
Other · 12.28M sh · $58.09M
Awards, exercises and tax withholding are never counted as buys or sales here. Methodology