Astera Labs, Inc.: which funds bought and sold

Institutions that bought and sold Astera Labs shares in Q2 2026, from the holdings they reported to the SEC on Form 13F for March 31, 2026 and June 30, 2026.

Between March 31, 2026 and June 30, 2026, 642 institutions that filed 13F reports for both quarters added to or opened positions in Astera Labs, and 335 cut or closed them. Together they added a net 7.6M shares, +6.5% on what they held at the start of the quarter. Active managers and hedge funds on our list were net sellers of 2.2M shares (−5.0%); index fund managers were net buyers of 4.6M shares (+13.3%). 358 opened a new position and 81 sold out entirely.

Bought, Q2 2026 642 institutions, 358 of them new holders Sold, Q2 2026 335 institutions, 81 of them sold out

Net change, all compared +7.6M shares (+6.5%)

Net change, active managers −2.2M shares (−5.0%), 48 bought, 43 sold

Buyers versus sellers

institutions compared, 1,043

642 bought 66 335 sold

Active managers and hedge funds 48 bought · 43 sold · −2.2M

Index fund managers 12 bought · 0 sold · +4.6M

Other institutions 582 bought · 292 sold · +5.2M

Biggest buyers

by change in shares held

Biggest buyers
Institution	Change in shares	Shares June 30, 2026	Value
Invesco Ltd.	+4.5M +1226.5%	4.9M	$2.4B
Blackrock, Inc. Index funds	+2.2M +19.5%	13.7M	$6.6B
Price T Rowe Associates Inc Active manager	+1.8M +289.6%	2.4M	$1.2B
Whale Rock Capital Management LLC Hedge fund	+1.6M New position	1.6M	$757M
Jpmorgan Chase & Co	+1.3M +312.6%	1.8M	$810M
T. Rowe Price Investment Management, Inc. Active manager	+870K New position	870K	$420M
Federated Hermes, Inc. Active manager	+666K +244.6%	938K	$453M
Vanguard Portfolio Management LLC Index funds	+578K +7.9%	7.9M	$3.8B
Bank Of America Corp	+410K +22.9%	2.2M	$1.1B
Nomura Asset Management Co Ltd	+402K +89.1%	852K	$412M
Vanguard Capital Management LLC Index funds	+386K +6.1%	6.7M	$3.2B
Millennium Management LLC Hedge fund	+384K +174.3%	604K	$292M
Rafferty Asset Management, LLC Index funds	+376K +39.8%	1.3M	$638M
Van Eck Associates Corp	+374K +20.0%	2.2M	$1.1B
Capital Impact Advisors, LLC	+349K New position	349K	$168M
State Street Corp Index funds	+344K +10.3%	3.7M	$1.8B
First Trust Advisors LP	+342K +143.0%	581K	$280M
Valliance Asset Management Ltd	+337K New position	337K	$163M
Neuberger Berman Group LLC Active manager	+328K +10439.9%	331K	$159M
Tudor Investment Corp Et Al Hedge fund	+324K +866.6%	361K	$174M

Biggest buyers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
Price T Rowe Associates Inc Active manager	+1.8M +289.6%	2.4M	$1.2B
Whale Rock Capital Management LLC Hedge fund	+1.6M New position	1.6M	$757M
T. Rowe Price Investment Management, Inc. Active manager	+870K New position	870K	$420M
Federated Hermes, Inc. Active manager	+666K +244.6%	938K	$453M
Millennium Management LLC Hedge fund	+384K +174.3%	604K	$292M
Neuberger Berman Group LLC Active manager	+328K +10439.9%	331K	$159M
Tudor Investment Corp Et Al Hedge fund	+324K +866.6%	361K	$174M
Franklin Resources Inc Active manager	+290K +1113.7%	316K	$153M
Qube Research & Technologies Ltd Hedge fund	+276K +786.7%	311K	$150M
Massachusetts Financial Services Co Active manager	+209K New position	209K	$101M

Biggest sellers

by change in shares held

Biggest sellers
Institution	Change in shares	Shares June 30, 2026	Value
Atreides Management, LP Hedge fund	−2.1M −63.8%	1.2M	$588M
Fred Alger Management, LLC Active manager	−1.3M −50.1%	1.3M	$620M
BNP Paribas Financial Markets	−1.0M −56.3%	792K	$383M
D. E. Shaw & Co., Inc. Hedge fund	−839K −55.2%	680K	$329M
Bridgewater Associates, LP Hedge fund	−750K −99.9%	992	$479,156
Two Sigma Investments, LP Hedge fund	−696K −93.5%	48K	$23.2M
FMR LLC Active manager	−685K −2.7%	24.8M	$12B
UBS Group AG	−641K −44.4%	802K	$387M
Westfield Capital Management Co LP Active manager	−611K −71.0%	249K	$120M
Frontier Capital Management Co LLC Active manager	−534K −77.5%	155K	$74.7M
Barclays PLC	−423K −27.2%	1.1M	$546M
1832 Asset Management L.P.	−399K −46.9%	452K	$218M
Adage Capital Partners Gp, L.L.C. Hedge fund	−365K −80.4%	89K	$42.9M
Susquehanna International Group, LLP	−338K −55.4%	272K	$132M
Champlain Investment Partners, LLC Active manager	−328K Sold out	0	—
Focus Partners Wealth	−307K −97.7%	7,348	$3.5M
E20 Capital Ltd	−304K Sold out	0	—
Citadel Advisors LLC Hedge fund	−303K Sold out	0	—
Amundi	−289K −15.4%	1.6M	$769M
Artisan Partners Limited Partnership Active manager	−286K −51.1%	274K	$132M

Biggest sellers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
Atreides Management, LP Hedge fund	−2.1M −63.8%	1.2M	$588M
Fred Alger Management, LLC Active manager	−1.3M −50.1%	1.3M	$620M
D. E. Shaw & Co., Inc. Hedge fund	−839K −55.2%	680K	$329M
Bridgewater Associates, LP Hedge fund	−750K −99.9%	992	$479,156
Two Sigma Investments, LP Hedge fund	−696K −93.5%	48K	$23.2M
FMR LLC Active manager	−685K −2.7%	24.8M	$12B
Westfield Capital Management Co LP Active manager	−611K −71.0%	249K	$120M
Frontier Capital Management Co LLC Active manager	−534K −77.5%	155K	$74.7M
Adage Capital Partners Gp, L.L.C. Hedge fund	−365K −80.4%	89K	$42.9M
Champlain Investment Partners, LLC Active manager	−328K Sold out	0	—

New positions

largest by value

Institution	Shares	Value June 30, 2026
Whale Rock Capital Management LLCHedge fund	1.6M	$757M
T. Rowe Price Investment Management, Inc.Active manager	870K	$420M
Capital Impact Advisors, LLC	349K	$168M
Valliance Asset Management Ltd	337K	$163M
Massachusetts Financial Services CoActive manager	209K	$101M
E Fund Management Co., Ltd.	197K	$95.1M
Driehaus Capital Management LLCActive manager	195K	$94M
Wt Asset Management Ltd	179K	$86.3M
Timessquare Capital Management, LLC	176K	$84.9M
Connor, Clark & Lunn Investment Management Ltd.	161K	$78M

Sold out

largest by value

Institution	Shares	Value March 31, 2026
Champlain Investment Partners, LLCActive manager	328K	$35.9M
E20 Capital Ltd	304K	$33.3M
Citadel Advisors LLCHedge fund	303K	$33.2M
Imc-Chicago, LLC	176K	$19.3M
Estuary Capital Management LP	171K	$18.7M
Sora Investors LLC	136K	$14.9M
Kadensa Capital Ltd	117K	$12.8M
Freemont Management S.A.	102K	$11.1M
Alyeska Investment Group, L.P.Hedge fund	97K	$10.6M
Carmignac GestionActive manager	60K	$6.6M

Who holds the shares

13F holdings at June 30, 2026

Institutions reporting: 974
Ten largest holders: 56.3%
Index fund managers: 30.8%
Active managers and hedge funds: 32.7%

Buying and selling by type of institution, March 31, 2026 to June 30, 2026
Type	Bought	Sold	New	Sold out	Net change in shares	Net %
Active managers and hedge funds	48	43	25	13	−2.2M	−5.0%
Index fund managers	12	0	0	0	+4.6M	+13.3%
Other institutions	582	292	333	68	+5.2M	+13.2%

Active managers and hedge funds: a list we maintain of about 400 well-known stock-picking firms and hedge funds, matched by SEC registration number (CIK) and checked against the filer names each quarter. Index fund managers: the large index houses, such as BlackRock, Vanguard, State Street, Geode and Northern Trust. Every other filer (banks, brokers, wealth managers, pension funds, insurers and firms not on the list) counts as another institution. A firm that files under several SEC registrations appears once for each.

What these filings can and cannot tell you

Form 13F lists the long positions in US-listed shares held by investment managers with more than $100 million in such holdings. Managers file it up to 45 days after each quarter ends, so this page shows what funds held at the end of each quarter, not what they are doing now: a position may have changed since. Short positions, most derivatives and smaller managers are not included, and a cut can mean a fund lost clients or rebalanced rather than a view on Astera Labs.

Only managers that filed a holdings report for both quarters are compared (1,043 here). 29 other holders are left out: first-time or late filers, firms that changed their SEC registration, and filings that withheld positions under confidential treatment, any of which would otherwise look like a new position or a sale. Figures are as reported by each manager in the SEC's quarterly 13F data sets; option positions are excluded.

← Back to Astera Labs, Inc. · Insiders · Politicians