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Of the 20 tracked institutions holding ALAB, 13 have a 3-year clone track record — 11 of them beat the S&P. Average holder's clone alpha: +7.2pt. It's a gauge of who owns the name, not just how many.
Among the 20 tracked institutional investors we monitor, ALAB (ASTERA LABS INC) is held with a combined value of $26.53B across 64,229,168 shares. The largest holder is FMR LLC with a position worth $12.00B (0.52% of their portfolio). 4 funds opened new positions in the most recent quarter. 9 funds increased their holdings. 7 funds reduced their position.
Total Institutional Value
$26.53B
Total Shares Held
64,229,168
Institutional Holders
20
% of Shares Outstanding
37.0%
of 173.49M shares · SEC 2026-07-31
Days to Cover
1.9-3.9%
8.75M shares short · FINRA 2026-08-14
Tracked 13F institutions hold 37.0% of ALAB's shares outstanding. This is a floor: 13F filings arrive on a ~45-day lag and we track only a subset of institutional filers, so true institutional ownership is higher. Shares-outstanding is the latest SEC cover-page figure (as of 2026-07-31), not a live float.
Ranked by estimated dollars moved (share change × implied price). 13F data lags up to 45 days.
| # | Fund | Value↓ | Portfolio % | Change |
|---|---|---|---|---|
| 1 | FMR LLC | $12.00B | 0.52% | -2.7% |
| 2 | BlackRock, Inc. | $6.61B | 0.10% | +19.5% |
| 3 | VANGUARD GROUP INC | $2.30B | 0.03% | +0.6% |
| 4 | STATE STREET CORP | $1.78B | 0.05% | +10.3% |
| 5 | PRICE T ROWE ASSOCIATES INC /MD/ | $1.16B | 0.12% | +289.6% |
| 6 | Whale Rock Capital Management LLC | $757.32M | 6.08% | New |
| 7 | Atreides Management, LP | $587.74M | 5.27% | -63.8% |
| 8 | MAVERICK CAPITAL LTD | $515.49M | 4.65% | +11.7% |
| 9 | MILLENNIUM MANAGEMENT LLC | $291.98M | 0.20% | +88.5% |
| 10 | WELLINGTON MANAGEMENT GROUP LLP | $120.23M | 0.02% | +151.5% |
SEC Schedule 13D (activist) and 13G (passive) filings for ALAB. Filed when an investor acquires 5%+ ownership.
| Member | Type | Date |
|---|---|---|
| Rob Bresnahan | Sell | Feb 27, 2025 |
| Rob Bresnahan | Sell | Feb 18, 2025 |
As of the latest SEC 13F filings, FMR LLC is the largest institutional holder of ALAB with a position worth $12.00B, representing 0.52% of their portfolio. In total, 20 institutional investors hold ALAB with a combined value of $26.53B.
In the most recent quarter, 4 funds opened a new position in ALAB. Additionally, 9 increased their holdings and 7 reduced their positions.
Institutional investors hold $26.53B worth of ALAB stock across 20 positions. The largest institutional holder is FMR LLC with $12.00B in holdings.
A 13F filing is a quarterly report required by the SEC from institutional investment managers with over $100 million in assets. It discloses their holdings in U.S. equities. For ALAB, these filings reveal which major funds are accumulating or reducing positions, providing insights into institutional sentiment.
Get notified when hedge funds change their ALAB positions.
Alpha = the manager's 3-year clone return minus the S&P 500. A skilled roster is a stronger tell than a crowded one — though even skilled managers' edge doesn't reliably survive the 13F disclosure lag. Why →
Last Close
$288.85
2026-09-08
YTD
+60.9%
49% of 52-week range