ALAB
Astera Labs, Inc. Common Stock · Technology · Semiconductors
Momentum inputs (comparable managers):
holder breadth +9.5% ·
share flow +12.7% ·
net new positions +4.3%
— formula
Broad accumulation — rising shares across more holders
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q3 2025
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q2 2026 | 162 | +4 | 96.67M | $46.26B | +12 | −7 |
| Q1 2026 | 160 | +4 | 88.96M | $9.89B | +9 | −6 |
| Q4 2025 | 155 | 0 | 96.62M | $16.07B | +2 | −1 |
| Q3 2025 | 23 | +2 | 64.57M | $12.64B | +2 | −1 |
| Q2 2025 | 19 | 0 | 54.23M | $4.90B | +2 | −2 |
| Q1 2025 | 16 | 0 | 12.18M | $727.01M | +2 | −2 |
| Q4 2024 | 16 | +1 | 10.03M | $1.33B | +2 | −1 |
| Q3 2024 | 14 | +5 | 6.25M | $327.30M | +6 | −1 |
| Q2 2024 | 9 | — | 2.59M | $156.71M | — | — |
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | Fidelity (FMR) ✦ | 24.08M | -2.9% | $4.71B | 0.2% | ▼ Trim | 2 | SEC ↗ ×6 |
| 2 | The Vanguard Group ✦ (passive) | 13.74M | +14.1% | $2.69B | 0.0% | ▲ Add | 2 | SEC ↗ ×5 |
| 3 | BlackRock ✦ (passive) | 11.23M | +57.6% | $2.20B | 0.0% | ▲ Add | 2 | SEC ↗ ×18 |
| 4 | D. E. Shaw & Co. ✦ | 2.55M | +25.4% | $498.73M | 0.4% | ▲ Add | 4 | SEC ↗ ×2 |
| 5 | State Street Global Advisors ✦ (passive) | 2.34M | +9.1% | $458.06M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 6 | Geode Capital Management ✦ (passive) | 2.32M | +86.7% | $455.15M | 0.0% | ▲ Add | 6 | SEC ↗ ×2 |
| 7 | JPMorgan Chase ✦ | 1.61M | — | $314.66M | 0.0% | n/c | 1 | SEC ↗ ×20 |
| 8 | Morgan Stanley ✦ | 1.45M | — | $284.78M | 0.0% | n/c | 1 | SEC ↗ ×15 |
| 9 | Two Sigma Investments ✦ | 1.26M | +58.1% | $247.40M | 0.4% | ▲ Add | 5 | SEC ↗ |
| 10 | Renaissance Technologies ✦ | 843.30K | +12.5% | $165.12M | 0.2% | ▲ Add | 6 | SEC ↗ |
| 11 | Capital World Investors ✦ | 600.00K | 0.0% | $117.48M | 0.0% | Held | 6 | SEC ↗ |
| 12 | Goldman Sachs Group ✦ | 454.23K | — | $88.94M | 0.0% | n/c | 1 | SEC ↗ ×3 |
| 13 | T. Rowe Price ✦ | 443.57K | +672.6% | $86.85M | 0.0% | ▲ Add | 6 | SEC ↗ ×2 |
| 14 | Millennium Management ✦ | 377.08K | -56.6% | $73.83M | 0.1% | ▼ Trim | 6 | SEC ↗ |
| 15 | Citadel Advisors ✦ | 326.49K | +797.8% | $63.93M | 0.1% | ▲ Add | 5 | SEC ↗ ×2 |
| 16 | Marshall Wace ✦ | 298.41K | +32.5% | $58.43M | 0.1% | ▲ Add | 3 | SEC ↗ ×3 |
| 17 | Baillie Gifford ✦ | 230.79K | -1.1% | $45.19M | 0.0% | ▼ Trim | 2 | SEC ↗ ×4 |
| 18 | Arrowstreet Capital ✦ | 202.97K | New | $39.74M | 0.0% | New | 1 | SEC ↗ |
| 19 | Wellington Management ✦ | 84.03K | -22.4% | $16.45M | 0.0% | ▼ Trim | 5 | SEC ↗ ×3 |
| 20 | AQR Capital Management ✦ | 62.53K | +56.6% | $12.24M | 0.0% | ▲ Add | 4 | SEC ↗ ×5 |
| 21 | Adage Capital Partners ✦ | 33.74K | -94.3% | $6.61M | 0.0% | ▼ Trim | 6 | SEC ↗ |
| 22 | Bridgewater Associates ✦ | 17.48K | -78.2% | $3.42M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 23 | Gotham Asset Management ✦ | 8.66K | New | $1.70M | 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
| Arrowstreet Capital | $39.74M | 0.0% |
| Gotham Asset Management | $1.70M | 0.0% |
Exited
| Norges Bank | $40.10M | was 0.0% |
Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 695 holders, 120.16M shares, $12.95B 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)
Director · 661 sh · $248,576
Director · 8.33K sh · $3.13M
Director · 3.50K sh · $1.32M
Director · 172 sh · $47,601
Director · 52 sh · $14,229
Director · 785 sh · $216,293
Director · 650 sh · $177,868
Director · 273 sh · $74,705
Director · 429 sh · $117,884
Director · 1.87K sh · $514,420
Awards, exercises and tax withholding are never counted as buys or sales here. Methodology