Ranked by reported Q1 2026 13F market value
Share of total reported institutional value in ALAB held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | FMR LLC | 25.5M | $2.80B | +0.8% | 14.999% | 0.15% |
| 2 | BlackRock, Inc. | 11.4M | $1.25B | -11.7% | 6.727% | 0.02% |
| 3 | VANGUARD PORTFOLIO MANAGEMENT LLC | 7.3M | $801.2M | — | 4.294% | 0.04% |
| 4 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | 6.8M | $745.4M | +6.9% | 3.996% | 0.08% |
| 5 | VANGUARD CAPITAL MANAGEMENT LLC | 6.3M | $694.9M | — | 3.725% | 0.02% |
| 6 | ALLIANCEBERNSTEIN L.P. | 2.5M | $418.0M | +15.4% | 1.476% | 0.14% |
| 7 | Atreides Management, LP | 3.4M | $368.9M | +108.9% | 1.977% | 9.82% |
| 8 | STATE STREET CORP | 3.3M | $365.4M | +7.5% | 1.959% | 0.01% |
| 9 | FRED ALGER MANAGEMENT, LLC | 2.6M | $282.0M | +33.0% | 1.512% | 1.24% |
| 10 | GEODE CAPITAL MANAGEMENT, LLC | 2.5M | $274.2M | +3.3% | 1.474% | 0.02% |
| 11 | BNP PARIBAS ARBITRAGE, SA | 1.8M | $254.6M | +128.0% | 1.069% | 0.12% |
| 12 | Amundi | 1.9M | $206.1M | +77.9% | 1.105% | 0.06% |
| 13 | BANK OF AMERICA CORP /DE/ | 1.8M | $196.0M | +20.1% | 1.051% | 0.01% |
| 14 | MORGAN STANLEY | 1.7M | $189.9M | -10.4% | 1.018% | 0.01% |
| 15 | BARCLAYS PLC | 1.6M | $170.3M | +35.1% | 0.913% | 0.07% |
| 16 | UBS Group AG | 1.5M | $167.0M | -15.5% | 0.895% | 0.03% |
| 17 | CITIGROUP INC | 1.5M | $165.8M | +63.0% | 0.889% | 0.07% |
| 18 | GOLDMAN SACHS GROUP INC | 1.5M | $162.2M | +12.7% | 0.870% | 0.02% |
| 19 | TWO SIGMA INVESTMENTS, LP | 984K | $107.8M | +36.9% | 0.578% | 0.09% |
| 20 | MAVERICK CAPITAL LTD | 955K | $104.7M | -2.1% | 0.561% | 1.21% |
| 21 | Rafferty Asset Management, LLC | 946K | $103.6M | -19.0% | 0.555% | 0.42% |
| 22 | WESTFIELD CAPITAL MANAGEMENT CO LP | 860K | $94.3M | +340.4% | 0.505% | 0.40% |
| 23 | VANGUARD FIDUCIARY TRUST CO | 852K | $93.4M | — | 0.500% | 0.02% |
| 24 | 1832 Asset Management L.P. | 851K | $93.2M | -36.8% | 0.500% | 0.12% |
| 25 | FULLER & THALER ASSET MANAGEMENT, INC. | 835K | $91.5M | +1.4% | 0.490% | 0.31% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). “% of Fund” shows how much of that investor’s total 13F portfolio is invested in ALAB — a direct measure of their conviction.
Filings activity in ALAB during Q1 2026, grouped by how each filer changed its position.
8 quarters of 13F filings · Δ columns show change vs prior quarter
| Quarter | Inst. Holders | Δ Holders | Ownership % | Δ Ownership | Total 13F Value | Δ Value |
|---|---|---|---|---|---|---|
| Q1 2026 | 678 | +1.3% | 21.68% | 9.45 pp | $13.55B | 30% |
| Q4 2025 | 669 | +7.0% | 31.13% | 4.86 pp | $19.46B | 13% |
| Q3 2025 | 625 | +28% | 35.99% | +21.18 pp | $22.49B | +143% |
| Q2 2025 | 490 | +31% | 14.81% | +5.24 pp | $9.25B | +55% |
| Q1 2025 | 373 | 7.0% | 9.57% | 10.12 pp | $5.98B | 51% |
| Q4 2024 | 401 | +75% | 19.69% | +14.29 pp | $12.30B | +264% |
| Q3 2024 | 229 | +62% | 5.40% | +0.43 pp | $3.38B | +8.8% |
| Q2 2024 | 141 | — | 4.97% | — | $3.10B | — |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Δ columns compare to the immediately prior filed quarter.
Quick answers to the most common questions about buying ALAB stock.
Based on Q1 2026 13F filings, institutional ownership of Astera Labs, Inc. Common Stock stands at 21.7%, held across 678 reporting institutions.
FMR LLC is the largest reported institutional holder of ALAB, with approximately 25,529,885 shares worth $2.80B as of Q1 2026.
Yes — 3 widely-followed marquee investors appear among the top 25 institutional holders of ALAB, including SUSQUEHANNA INTERNATIONAL GROUP, LLP, Atreides Management, LP, TWO SIGMA INVESTMENTS, LP.
Our composite Smart Money Score for ALAB is 51 out of 100 (Neutral). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
144 institutions opened new positions in ALAB during Q1 2026, while 135 fully exited. 112 added to existing positions and 417 trimmed.
ALAB institutional ownership fell by 9.45 percentage points quarter-over-quarter, with a net change of +9 holders.
The top 10 institutions account for 59.1% of all reported 13F value in ALAB, and the top 25 account for 75.3%.
All data is sourced from SEC Form 13F filings, which institutional investment managers with at least $100M in assets are required to file each quarter. We process every 13F filing from EDGAR and recompute the aggregates after each cycle. Insider transactions are sourced from Form 4 filings.
Astera Labs, Inc. Common Stock (ALAB) Institutional Ownership