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ALAB · Astera Labs, Inc. · Holdings

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$271.64 -18.42 (-6.35%)
Market Cap
$50.28B
Shares
173.49M
Volume · Oct 22 403.82K Avg daily vol (3M) 4.11M

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Institutional holdings are being reconciled with SEC filings. Holder totals and changes may be incomplete until reconciliation finishes.
The Sep 30, 2026 filing window is still open — showing the latest known positions. Funds that have not filed yet carry their prior-quarter positions; a fund that filed without this stock counts as sold out. Each fund's Change is measured against its own previous reported quarter, shown in the Reported column. Pick a completed quarter in the Quarter selector below to put every fund on one quarter and see the stock-wide activity breakdown.
Holders: 1,009
Total Value: $70,974,257,488
Total Shares: 147,262,683
Showing 1–100 of 1,072 holdings by value · page 1 of 11

Institutional Ownership Trend

11 quarters

Holder Concentration

Across 1,008 13F filers
Top Holder
16.9%
Mar 2024 → Jun 2026 · range 16.9% – 44.4%
of institutional value
Top 5
40.9%
Mar 2024 → Jun 2026 · range 40.9% – 68.3%
of institutional value
Top 10
54.3%
Mar 2024 → Jun 2026 · range 53.6% – 80.3%
of institutional value
HHI
509
Mar 2024 → Jun 2026 · range 509 – 2,192
Broadly held

Who Holds ALAB

Last 8 quarters through Sep 30, 2026 (filing window open)

Each kind of 13F filer's share of the common shares 13F filers report. Holder type comes from regulatory records, never the filer's name; style, turnover and horizon are measured from each filer's own 13F book. The quarter selector does not change this card.

Jun 30, 2026, the newest closed quarter: 993 filers, like-for-like change +4.4%; actively managed books +1.6%; index-like books +10.4%.

Holder type Share Filers Change
Registered adviser 34.9% 564 -2.1%
Exempt adviser 0.8% 18 +21.6%
Adviser 6.6% 19 +346.0%
Bank 10.5% 33 +9.4%
Insurer 0.1% 3 +21.0%
Broker-dealer 0.1% 2 -28.7%
Registered fund 0.0% 1 -70.5%
Benefit plan 0.4% 7 +9.9%
Non-US 3.5% 18 -32.7%
Holding company 34.2% 13 +3.6%
Unknown 8.8% 315 -12.0%

The Sep 30, 2026 filing window is still open, so its bar carries the Jun 30, 2026 positions of filers that have not filed yet.

How the mix is measured

Shares are 13F common shares restated to today's split basis; options and principal amounts are left out. The change compares only filers with a 13F in both quarters and keeps each filer in its bucket of the later quarter on both sides; a filer that continues under a new CIK is compared through its successor. Holder type comes from each filer's current regulatory profile; client base and private funds come from the Form ADV roster current at each quarter end (rosters from December 2019, so an earlier quarter reads Unknown). Style, turnover, horizon and book size are measured from each filer's 13F book in the newest measured quarter, and Not measured means none was. Actively managed books are those measured systematic-like, concentrated or diversified active.

Excluded 11 holders with no observed 2026-03-31 13F and 8 holders with no observed 2026-06-30 13F. Compared across CIK changes: JANUS HENDERSON GROUP PLC continues as Jupiter Topco LLC.

Conviction and Crowding

993 13F filers, quarter ended Jun 30, 2026

Measured across every 13F filer's common-share book once the quarter's filing window closed. Crowding counts filers with high turnover or that advise private funds on Form ADV.

Conviction holders
36
3.63% of filers hold it in their top 10
Mar 31, 2026: 5
Holders above 5%
14
median weight 0.044%
Mar 31, 2026: 2
Crowding
12.6%
of shares outstanding, 37th percentile
Mar 31, 2026: 15.8%
Private-fund advisers
11.9%
of shares outstanding
Institutional ownership
74.5%
86.6% of the estimated free float
Top 10 holders
55.9%
of 13F shares, Herfindahl 0.062
Active holders
+1.6%
like-for-like share change of active filers
5% stakes on record
2
0 13D, 2 13G (1 institutional, 0 passive, 1 exempt)
How long holders have held it value-weighted 7.4 quarters
Under 1 year 20.3% 1 to 3 years 79.7% 3 years or more 0.000% Since coverage start 0.000%

Managers in the top fifth by current three-year FundScore alpha were net sellers of $56,735,237 (2 buying, 2 selling).

Estimated Holder Cost Basis

Quarter ended Jun 30, 2026, on that quarter's share basis

Estimated, never filed: each 13F buy is costed at its quarter's average traded price and each sale keeps the average cost, so this is what holders paid on average if they traded evenly through each quarter.

Estimated avg cost
$170.56
estimated per share
Mar 31, 2026: $130.17
Quarter-end price
$482.85
implied by 13F values
Estimated gain or loss
+183.1%
price against the estimated cost
Estimated at a loss
0.014%
of costed 13F value

Estimated cost covers 31.7% of the 13F shares; positions already held when a filer's 13F history starts, or bought in a quarter without a trusted average price, have no estimate.

Shared Holders

Companies ALAB's active holders also own, quarter ended Jun 30, 2026
# Company Shared holders
1 CRDO Credo Technology Group Holding Ltd 80
2 NBIS Nebius Group N.V. 90
3 MRVL Marvell Technology, Inc. 152
4 MU Micron Technology Inc 240
5 AMD Advanced Micro Devices Inc 235
6 BE Bloom Energy Corp 84
7 LITE Lumentum Holdings Inc. 80
8 SNDK Sandisk Corp 126
9 CRWD CrowdStrike Holdings, Inc. 156
10 PLTR Palantir Technologies Inc. 164

Shareholder Targets

13F filers that own its peers but not ALAB, quarter ended Jun 30, 2026

Found through its holder-overlap peers: CRDO, NBIS, MRVL, MU, AMD, BE, LITE, SNDK, CRWD, PLTR, COHR, NVDA, LRCX, AVGO, TSM, GOOGL, WDC, META, ARM, TER. 6,081 filers in all.

# Filer In peers
1 Capital Research Global Investors Adviser, Diversified active $160,837,004,413 16 held
2 Capital International Investors Adviser, Diversified active $105,234,161,622 10 held
3 JENNISON ASSOCIATES LLC Registered adviser, Diversified active $57,434,565,008 17 held
4 Fisher Asset Management, LLC Adviser, Diversified active $52,516,164,490 17 held
5 ARROWSTREET CAPITAL, LIMITED PARTNERSHIP Registered adviser, Diversified active $38,240,419,663 17 held
6 Berkshire Hathaway Inc Insurer, Concentrated $37,764,088,381 1 held
7 PRIMECAP MANAGEMENT CO/CA/ Registered adviser, Diversified active $35,654,772,050 13 held
8 Sanders Capital, LLC Registered adviser, Concentrated $34,756,319,642 5 held
9 PRINCIPAL FINANCIAL GROUP INC Insurer, Diversified active $26,568,697,346 19 held
10 LOOMIS SAYLES & CO L P Registered adviser, Diversified active $20,141,847,290 14 held

Fund Ownership of ALAB by Fund Type

Registered funds' Form N-PORT reports for the quarter ended Jun 30, 2026

Index funds and index ETFs hold 16.89% of shares outstanding.

Fund type Of shares outstanding Shares
Index funds 1.96% 3,399,778
Index ETFs 14.93% 25,903,792
Active ETFs 1.10% 1,901,318
Active funds 17.48% 30,325,306
Unclassified 2.24% 3,886,470
All registered funds 37.71% 65,416,664
How fund types are measured

Each fund series counts once, with its latest Form N-PORT report dated inside the quarter; only long share positions count, restated to today's split basis. The fund type is the series' latest Form N-CEN answer on or before the quarter end (the index-fund box and the exchange-traded flag), never its name. Unclassified funds have no usable N-CEN; unit investment trusts are among them, so index ownership is a floor. Funds sit inside their advisers' 13F reports, so these shares overlap the 13F figures and are never added to them.

Showing 100 of 1,072
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Holder Value (USD) % of 13F Shares Open

Showing the top 100 of 1,072 holders. Create a free account to see every holder, past quarters, search, filters and CSV export.

Key facts CIK 1736297 CUSIP 04626A103 13F (30d) 167 filings 161 filers Visit website Investor relations