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ALAB in the 13F filings

Astera Labs Inc · CUSIP 04626A103

Sector · SemiconductorsTheme · AI infrastructure and semiconductors· L3VLUP-definedTheme · Semiconductors
Quarter
Q3 2026 · early filersQ2 2026Q1 2026Q4 2025Q3 2025Q2 2025Q1 2025Q4 2024Q3 2024Q2 2024Q1 2024
Quarter end
30 Jun 2026
the date the book describes
Filed
27 Oct 2026
latest of these filings; the earliest 3 Aug 2026
Managers listing it
39
at least, of 95 tracked, among listed positions
Comparable managers
91
filed both Q1 2026 and Q2 2026; 12 listed it in both
Shares listed
40,753,640
combined, among listed positions
Reported value
$19.3bn
combined, at the quarter end

AllianceBernstein LP. Values in this filing are at the previous quarter end's prices; its share count is the quarter end's.

Among the 91 comparable managers: 22 buyers (opened or added shares) and 19 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was +3,827,965.

Managers listing ALAB in Q2 2026

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q1 2026, and only where both filings list the position. A rise in value with no rise in shares is the price, not buying.

39 of 39 holders

ActionFiling
Fidelity (FMR LLC)24,845,364$12.0bn0.52%Trimmed-684,52113 Aug 2026 (the filing on sec.gov)
Invesco Ltd4,910,555$2.4bn0.19%Added+4,540,37514 Aug 2026 (the filing on sec.gov)
T. Rowe Price Associates Inc2,409,693$1.2bn0.12%Added+1,791,19414 Aug 2026 (the filing on sec.gov)
Whale Rock Capital Management LLC1,567,882$757m6.08%Newnew14 Aug 2026 (the filing on sec.gov)
Maverick Capital Ltd1,067,215$515m4.55%Added+111,85914 Aug 2026 (the filing on sec.gov)
D. E. Shaw & Co.680,298$329m0.16%Trimmed-839,26314 Aug 2026 (the filing on sec.gov)
Capital World Investors616,374$298munder 0.1%Added+16,37412 Aug 2026 (the filing on sec.gov)
Millennium Management LLC604,489$292m0.11%Added+384,08214 Aug 2026 (the filing on sec.gov)
Tudor Investment Corp361,000$174m0.24%Added+323,65414 Aug 2026 (the filing on sec.gov)
Neuberger Berman Group LLC331,269$159m0.11%Added+328,12627 Oct 2026 (the filing on sec.gov)
Squarepoint Ops LLC317,208$153m0.17%Added+175,65114 Aug 2026 (the filing on sec.gov)
Artisan Partners LP274,306$132m0.21%Trimmed-286,27313 Aug 2026 (the filing on sec.gov)
Susquehanna International Group LLP272,491$132munder 0.1%Trimmed-338,17814 Aug 2026 (the filing on sec.gov)
Wellington Management Group LLP248,914$120munder 0.1%Added+149,95114 Aug 2026 (the filing on sec.gov)
AllianceBernstein LP1,017,008$111munder 0.1%Trimmed-1,495,68714 Aug 2026 (the filing on sec.gov)
Baillie Gifford & Co218,430$106m0.10%Trimmed-26,6986 Aug 2026 (the filing on sec.gov)
MFS Investment Management208,919$101munder 0.1%Newnew3 Aug 2026 (the filing on sec.gov)
Renaissance Technologies LLC153,400$74m0.10%Added+23,99913 Aug 2026 (the filing on sec.gov)
Light Street Capital Management LLC125,750$61m6.73%Newnew14 Aug 2026 (the filing on sec.gov)
Man Group PLC95,224$46m0.07%Added+60,03614 Aug 2026 (the filing on sec.gov)
Janus Henderson Group Ltd73,120$35munder 0.1%Trimmed-360,04514 Aug 2026 (the filing on sec.gov)
AQR Capital Management LLC67,117$32munder 0.1%Trimmed-21,18614 Aug 2026 (the filing on sec.gov)
Two Sigma Investments LP48,083$23munder 0.1%Trimmed-696,22614 Aug 2026 (the filing on sec.gov)
Voloridge Investment Management LLC45,625$22m0.09%Trimmed-59,68714 Aug 2026 (the filing on sec.gov)
Marshall Wace LLP41,065$20munder 0.1%Trimmed-138,48513 Aug 2026 (the filing on sec.gov)
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Largest increases and reductions, by shares

Q1 2026 to Q2 2026, among managers that listed it in both quarters or opened it.

Increases

Reductions

New positions and exits

At least these many: a manager is shown exiting only where its own filing shows the position gone.

New (10)

Exited (2)

Ownership over time

Every quarter on file. A quarter-end value moves with the price as well as with the shares held; buyers and sellers count comparable managers, by shares.
11 in Q3 2024 to 24 in Q2 2026

Tracked managers listing it, at least.

0102030Q1 2024Q2 2024Q3 2024Q4 2024Q1 2025Q2 2025Q3 2025Q4 2025Q1 2026Q2 2026
the quarter shown share split complete books; unmarked quarters rest on listed positionsClick a quarter to open it.
ALAB by quarter
QuarterHoldersReported valueBuyersSellers
Q1 202415$1.5bn150
Q2 20248$1.6bn28
Q3 202411$1.5bn83
Q4 202419$5.4bn128
Q1 202515$2.5bn105
Q2 202523$3.7bn167
Q3 202521$7.5bn1310
Q4 202519$6.1bn1327
Q1 202613$3.9bn1320
Q2 202624$18.9bn2219

Compare with…

Holders over time, buyers and sellers, and the managers holding both, side by side for up to four stocks.

ALAB and NVDA →ALAB and AVGO →ALAB and MU →Choose a stock to compare with ALAB →

How much of the picture this is

A 13F is a manager’s long US-listed equity book at a quarter end, filed up to 45 days later. It shows no shorts, cash, bonds or performance, and it is never today’s portfolio. Large books are listed to their largest positions, so a manager missing from this table may still hold a small position below that line. These are 95 tracked managers, not the institutional market.

Which funds own ALAB, latest filings →Back to the 13F Explorer →