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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
31 Mar 2026
the date the book describes
Filed
27 Oct 2026
latest of these filings; the earliest 8 May 2026
Managers listing it
31
at least, of 95 tracked, among listed positions
Comparable managers
91
filed both Q4 2025 and Q1 2026; 15 listed it in both
Shares listed
36,925,675
combined, among listed positions
Reported value
$4.2bn
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: 13 buyers (opened or added shares) and 20 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was -1,361,114.

Managers listing ALAB in Q1 2026

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q4 2025, and only where both filings list the position. A rise in value with no rise in shares is the price, not buying.

31 of 31 holders

ActionFiling
Fidelity (FMR LLC)25,529,885$2.8bn0.15%Added+194,94415 May 2026 (the filing on sec.gov)
AllianceBernstein LP2,512,695$418m0.14%Added+334,90015 May 2026 (the filing on sec.gov)
D. E. Shaw & Co.1,519,561$167m0.10%Trimmed-932,81915 May 2026 (the filing on sec.gov)
Maverick Capital Ltd955,356$105m1.21%Trimmed-20,60315 May 2026 (the filing on sec.gov)
Bridgewater Associates LP750,940$82m0.37%Added+510,41015 May 2026 (the filing on sec.gov)
Two Sigma Investments LP744,309$82m0.07%Added+110,93515 May 2026 (the filing on sec.gov)
T. Rowe Price Associates Inc618,499$68munder 0.1%Trimmed-545,91515 May 2026 (the filing on sec.gov)
Susquehanna International Group LLP610,669$67munder 0.1%Added+232,66515 May 2026 (the filing on sec.gov)
Capital World Investors600,000$66munder 0.1%Held013 May 2026 (the filing on sec.gov)
Artisan Partners LP560,579$61m0.10%Trimmed-334,95113 May 2026 (the filing on sec.gov)
Janus Henderson Group Ltd433,165$47munder 0.1%Added+421,75518 May 2026 (the filing on sec.gov)
Invesco Ltd370,180$41munder 0.1%Trimmed-167,31012 May 2026 (the filing on sec.gov)
Citadel Advisors LLC302,531$33munder 0.1%Added+179,48615 May 2026 (the filing on sec.gov)
Baillie Gifford & Co245,128$27munder 0.1%Trimmed-7,7858 May 2026 (the filing on sec.gov)
Millennium Management LLC220,407$24munder 0.1%Trimmed-30,97615 May 2026 (the filing on sec.gov)
Marshall Wace LLP179,550$20munder 0.1%Trimmed-168,74615 May 2026 (the filing on sec.gov)
Squarepoint Ops LLC141,557$16munder 0.1%Trimmed-65,07415 May 2026 (the filing on sec.gov)
Renaissance Technologies LLC129,401$14munder 0.1%Trimmed-277,00014 May 2026 (the filing on sec.gov)
Voloridge Investment Management LLC105,312$12munder 0.1%Added+6,15715 May 2026 (the filing on sec.gov)
Wellington Management Group LLP98,963$11munder 0.1%Added+43,27215 May 2026 (the filing on sec.gov)
AQR Capital Management LLC88,303$9.2munder 0.1%Added+44,28315 May 2026 (the filing on sec.gov)
Holocene Advisors LP53,443$5.9munder 0.1%Newnew15 May 2026 (the filing on sec.gov)
Tudor Investment Corp37,346$4.1munder 0.1%Trimmed-55,64115 May 2026 (the filing on sec.gov)
Man Group PLC35,188$3.9munder 0.1%Trimmed-4,38315 May 2026 (the filing on sec.gov)
Walleye Capital LLC28,814$3.2munder 0.1%Trimmed-22,61813 May 2026 (the filing on sec.gov)
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Largest increases and reductions, by shares

Q4 2025 to Q1 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 (2)

Exited (4)

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 →