Astera Labs
ALAB
701 hedge funds and large institutions have $19.3B invested in Astera Labs in 2025 Q4 according to their latest regulatory filings, with 174 funds opening new positions, 285 increasing their positions, 191 reducing their positions, and 124 closing their positions.
49% more repeat investments, than reductions
Existing positions increased: 285 | Existing positions reduced: 191
40% more first-time investments, than exits
New positions opened: 174 | Existing positions closed: 124
6% more funds holding
Funds holding: 659 → 701 (+42)
2.15% more ownership
Funds ownership: 66.65% → 68.8% (+2.2%)
7% less funds holding in top 10
Funds holding in top 10: 15 → 14 (-1)
11% less capital invested
Capital invested by funds: $21.7B → $19.3B (-$2.39B)
25% less call options, than puts
Call options by funds: $1.39B | Put options by funds: $1.86B
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
BlackRock
New York
|
+$291M |
| 2 |
AM
Atreides Management
Boston,
Massachusetts
|
+$259M |
| 3 |
Fidelity Investments
Boston,
Massachusetts
|
+$210M |
| 4 |
Artisan Partners
Milwaukee,
Wisconsin
|
+$150M |
| 5 |
Goldman Sachs
New York
|
+$144M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Massachusetts Financial Services
Boston,
Massachusetts
|
-$295M |
| 2 |
Barclays
London,
United Kingdom
|
-$145M |
| 3 |
DCM
Driehaus Capital Management
Chicago,
Illinois
|
-$138M |
| 4 |
VARA
Value Aligned Research Advisors
Princeton,
New Jersey
|
-$136M |
| 5 |
AllianceBernstein
Nashville,
Tennessee
|
-$124M |
ALAB Hedge Fund Activity: Q4 2025 in Review
701 of the 8,266 institutional investors tracked by Wall St. Rank reported a position in Astera Labs (ALAB) for Q4 2025, worth a combined $19.3B — down 11% from $21.7B a quarter earlier.
Buyers outnumbered sellers: 174 funds opened new ALAB positions and 124 closed out — a net gain of 50 holders — while 285 added to existing stakes and 191 trimmed.
The largest buyer was BlackRock, adding an estimated $291M. The largest seller was Massachusetts Financial Services, exiting entirely with an estimated $295M sold.
- 701 institutional investors held Astera Labs (ALAB) as of Q4 2025, up from 659 in Q3 2025.
- Funds reported $19.3B of Astera Labs stock for Q4 2025, down 11% quarter-over-quarter.
- 174 funds opened new Astera Labs positions in Q4 2025 and 124 closed out, a net change of +50 holders.
- The largest Astera Labs buyer in Q4 2025 was BlackRock, an estimated $291M added.
- The largest Astera Labs seller in Q4 2025 was Massachusetts Financial Services, an estimated $295M sold.
Based on aggregated 13F filings for Q4 2025.