Who owns Astera Labs, Inc. Common Stock (ALAB)
Which tracked institutional funds hold ALAB, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See ALAB company fundamentals →
Ownership as of the 2026-Q2 13F filings (latest filed 2026-09-22). 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
How the tape is positioned
The tracked-fund tape on ALAB is one-sided between 2026-Q1 and 2026-Q2: 589 added or opened and 103 trimmed or exited — on balance accumulating.
A prompt to read the filings, not a verdict. 13F is a quarter-end snapshot disclosed up to 45 days late; a fund adds or exits for mandate, benchmark, and timing reasons that have nothing to do with a view on the stock. This is a starting question, not a signal to trade.
Conviction spread
ALAB’s largest tracked holder by dollar value, FMR LLC, sizes it at 0.5% of its own reported 13F book, while the median holder sizes it at 0.1% of theirs — a 0.4pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in ALAB divided by its whole reported 13F book, so it is comparable across funds of different sizes and is unaffected by stock splits. A higher share means a fund has committed more of its book to the name — a starting question about conviction, not a verdict or a signal to trade.
Institutional & insider positioning
Between 2026-Q1 and 2026-Q2, across 940 tracked filers holding ALAB, 627 increased or opened the position and 380 reduced or closed it; over the same quarter, open-market insider Form 4s were net sales.
This fuses two public signals for the same quarter — how tracked institutions changed their positions and whether insiders bought or sold in the open market. It describes what was filed; it is a starting question, not a verdict or a signal to trade.
New buyers & exits
Funds opening or closing a position in ALAB between the 2026-Q1 and 2026-Q2 13F filings, and the largest changes among funds holding it in both. New buyers and exits are counted on fund presence (split-invariant); adds and trims are measured on reported value.
New buyers 183
- Whale Rock Capital Management LLC$757M
- Capital Impact Advisors, LLC$168M
- Valliance Asset Management Ltd$163M
- MASSACHUSETTS FINANCIAL SERVICES CO /MA/$101M
- E Fund Management Co., Ltd.$95M
- Driehaus Capital Management LLC$94M
Full exits 71
- Amundi$206M
- JANUS HENDERSON GROUP PLC$47M
- Pacer Advisors, Inc.$44M
- Champlain Investment Partners, LLC$36M
- E20 Capital Ltd$33M
- CITADEL ADVISORS LLC$33M
Largest adds
- FMR LLC$9.2B
- BlackRock, Inc.$5.6B
- VANGUARD PORTFOLIO MANAGEMENT LLC$3.0B
- VANGUARD CAPITAL MANAGEMENT LLC$2.6B
- Invesco Ltd.$2.3B
- STATE STREET CORP$1.4B
Largest trims
- ALLIANCEBERNSTEIN L.P.$307M
- Bridgewater Associates, LP$82M
- TWO SIGMA INVESTMENTS, LP$58M
- Altshuler Shaham Ltd$37M
- Focus Partners Wealth$31M
- Anther Capital Ltd$25M
Institutional holders
One row per tracked fund, most shares held first (every row is from one quarter; reported value breaks ties). “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding.
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| FMR LLC trimmed | 24,845,364 | $12.0B | 21.7% | 2026-Q2 |
| BlackRock, Inc. added | 13,683,865 | $6.6B | 12.0% | 2026-Q2 |
| VANGUARD PORTFOLIO MANAGEMENT LLC added | 7,887,650 | $3.8B | 6.9% | 2026-Q2 |
| VANGUARD CAPITAL MANAGEMENT LLC added | 6,727,089 | $3.2B | 5.9% | 2026-Q2 |
| Invesco Ltd. added | 4,910,555 | $2.4B | 4.3% | 2026-Q2 |
| STATE STREET CORP added | 3,678,093 | $1.8B | 3.2% | 2026-Q2 |
| GEODE CAPITAL MANAGEMENT, LLC added | 2,796,173 | $1.3B | 2.4% | 2026-Q2 |
| PRICE T ROWE ASSOCIATES INC /MD/ added | 2,409,693 | $1.2B | 2.1% | 2026-Q2 |
| VAN ECK ASSOCIATES CORP added | 2,237,961 | $1.1B | 2.0% | 2026-Q2 |
| BANK OF AMERICA CORP /DE/ added | 2,198,235 | $1.1B | 1.9% | 2026-Q2 |
| JPMORGAN CHASE & CO added | 1,775,810 | $810M | 1.5% | 2026-Q2 |
| MORGAN STANLEY trimmed | 1,686,491 | $815M | 1.5% | 2026-Q2 |
| Whale Rock Capital Management LLC new | 1,567,882 | $757M | 1.4% | 2026-Q2 |
| NORGES BANK added | 1,434,347 | $693M | 1.3% | 2026-Q2 |
| CITIGROUP INC trimmed | 1,352,136 | $653M | 1.2% | 2026-Q2 |
| Rafferty Asset Management, LLC added | 1,321,419 | $638M | 1.2% | 2026-Q2 |
| FRED ALGER MANAGEMENT, LLC trimmed | 1,283,840 | $620M | 1.1% | 2026-Q2 |
| GOLDMAN SACHS GROUP INC trimmed | 1,234,152 | $596M | 1.1% | 2026-Q2 |
| Atreides Management, LP trimmed | 1,216,795 | $588M | 1.1% | 2026-Q2 |
| BARCLAYS PLC trimmed | 1,130,944 | $546M | 1.0% | 2026-Q2 |
| MAVERICK CAPITAL LTD added | 1,067,215 | $515M | 0.9% | 2026-Q2 |
| ALLIANCEBERNSTEIN L.P. trimmed | 1,017,008 | $111M | 0.2% | 2026-Q2 |
| FEDERATED HERMES, INC. added | 938,311 | $453M | 0.8% | 2026-Q2 |
| VANGUARD FIDUCIARY TRUST CO added | 884,834 | $427M | 0.8% | 2026-Q2 |
| NORTHERN TRUST CORP added | 870,775 | $421M | 0.8% | 2026-Q2 |
| FULLER & THALER ASSET MANAGEMENT, INC. added | 857,286 | $414M | 0.8% | 2026-Q2 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC added | 854,492 | $413M | 0.7% | 2026-Q2 |
| NOMURA ASSET MANAGEMENT CO LTD added | 852,312 | $412M | 0.7% | 2026-Q2 |
| UBS Group AG trimmed | 802,024 | $387M | 0.7% | 2026-Q2 |
| BNP PARIBAS FINANCIAL MARKETS trimmed | 792,380 | $383M | 0.7% | 2026-Q2 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC added | 749,607 | $362M | 0.7% | 2026-Q2 |
| D. E. Shaw & Co., Inc. trimmed | 680,298 | $329M | 0.6% | 2026-Q2 |
| DEUTSCHE BANK AG\ trimmed | 674,096 | $326M | 0.6% | 2026-Q2 |
| Legal & General Group Plc trimmed | 644,847 | $311M | 0.6% | 2026-Q2 |
| Capital World Investors added | 616,374 | $298M | 0.5% | 2026-Q2 |
| MILLENNIUM MANAGEMENT LLC added | 604,489 | $292M | 0.5% | 2026-Q2 |
| FIRST TRUST ADVISORS LP added | 580,688 | $280M | 0.5% | 2026-Q2 |
| Value Aligned Research Advisors, LLC | 568,316 | $275M | 0.5% | 2026-Q2 |
| Clear Street Group Inc. added | 539,212 | $260M | 0.5% | 2026-Q2 |
| CANADA PENSION PLAN INVESTMENT BOARD trimmed | 527,400 | $255M | 0.5% | 2026-Q2 |
| Bank of New York Mellon Corp added | 498,996 | $241M | 0.4% | 2026-Q2 |
| Tidal Investments LLC added | 494,315 | $239M | 0.4% | 2026-Q2 |
| 1832 Asset Management L.P. trimmed | 451,800 | $218M | 0.4% | 2026-Q2 |
| Swiss National Bank trimmed | 383,964 | $185M | 0.3% | 2026-Q2 |
| TUDOR INVESTMENT CORP ET AL added | 361,000 | $174M | 0.3% | 2026-Q2 |
| Capital Impact Advisors, LLC new | 348,617 | $168M | 0.3% | 2026-Q2 |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. added | 345,575 | $167M | 0.3% | 2026-Q2 |
| Strategy Capital LLC trimmed | 342,338 | $165M | 0.3% | 2026-Q2 |
| Valliance Asset Management Ltd new | 337,150 | $163M | 0.3% | 2026-Q2 |
| NEUBERGER BERMAN GROUP LLC added | 331,269 | $159M | 0.3% | 2026-Q2 |
| Nuveen, LLC added | 326,756 | $158M | 0.3% | 2026-Q2 |
| Sumitomo Mitsui Trust Group, Inc. added | 322,919 | $156M | 0.3% | 2026-Q2 |
| Squarepoint Ops LLC added | 317,208 | $153M | 0.3% | 2026-Q2 |
| FRANKLIN RESOURCES INC added | 316,146 | $153M | 0.3% | 2026-Q2 |
| Qube Research & Technologies Ltd added | 311,438 | $150M | 0.3% | 2026-Q2 |
| AMERICAN CENTURY COMPANIES INC added | 303,470 | $147M | 0.3% | 2026-Q2 |
| Mirae Asset Global Investments Co., Ltd. added | 299,405 | $145M | 0.3% | 2026-Q2 |
| VANGUARD ASSET MANAGEMENT, Ltd added | 292,659 | $141M | 0.3% | 2026-Q2 |
| AMAZON COM INC | 277,777 | $134M | 0.2% | 2026-Q2 |
| Artisan Partners Limited Partnership trimmed | 274,306 | $132M | 0.2% | 2026-Q2 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP trimmed | 272,491 | $132M | 0.2% | 2026-Q2 |
| DIMENSIONAL FUND ADVISORS LP trimmed | 264,763 | $128M | 0.2% | 2026-Q2 |
| California Public Employees Retirement System added | 258,178 | $125M | 0.2% | 2026-Q2 |
| AMERIPRISE FINANCIAL INC added | 257,702 | $125M | 0.2% | 2026-Q2 |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE trimmed | 257,702 | $124M | 0.2% | 2026-Q2 |
| Stephens Investment Management Group LLC trimmed | 254,996 | $123M | 0.2% | 2026-Q2 |
| Analog Century Management LP trimmed | 253,619 | $123M | 0.2% | 2026-Q2 |
| WESTFIELD CAPITAL MANAGEMENT CO LP trimmed | 249,299 | $120M | 0.2% | 2026-Q2 |
| WELLINGTON MANAGEMENT GROUP LLP added | 248,914 | $120M | 0.2% | 2026-Q2 |
| BAILLIE GIFFORD & CO trimmed | 218,430 | $106M | 0.2% | 2026-Q2 |
| VICTORY CAPITAL MANAGEMENT INC added | 216,686 | $105M | 0.2% | 2026-Q2 |
| Defiance ETFs, LLC trimmed | 212,915 | $92M | 0.2% | 2026-Q2 |
| National Pension Service trimmed | 209,418 | $101M | 0.2% | 2026-Q2 |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ trimmed | 208,919 | $101M | 0.2% | 2026-Q2 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM added | 207,359 | $100M | 0.2% | 2026-Q2 |
| Mitsubishi UFJ Asset Management Co., Ltd. added | 202,725 | $98M | 0.2% | 2026-Q2 |
| ALKEON CAPITAL MANAGEMENT LLC | 200,000 | $97M | 0.2% | 2026-Q2 |
| E Fund Management Co., Ltd. new | 196,877 | $95M | 0.2% | 2026-Q2 |
| Driehaus Capital Management LLC added | 194,619 | $94M | 0.2% | 2026-Q2 |
| ROYAL BANK OF CANADA added | 192,518 | $93M | 0.2% | 2026-Q2 |
| RHUMBLINE ADVISERS added | 183,274 | $89M | 0.2% | 2026-Q2 |
| WELLS FARGO & COMPANY/MN added | 178,958 | $86M | 0.2% | 2026-Q2 |
| SALEM INVESTMENT COUNSELORS INC trimmed | 178,908 | $86M | 0.2% | 2026-Q2 |
| WT Asset Management Ltd added | 178,711 | $86M | 0.2% | 2026-Q2 |
| TimesSquare Capital Management, LLC added | 175,869 | $85M | 0.2% | 2026-Q2 |
| SEI INVESTMENTS CO trimmed | 173,226 | $84M | 0.2% | 2026-Q2 |
| ProShare Advisors LLC added | 168,485 | $81M | 0.1% | 2026-Q2 |
| Connor, Clark & Lunn Investment Management Ltd. added | 161,443 | $78M | 0.1% | 2026-Q2 |
| RAYMOND JAMES FINANCIAL INC added | 158,948 | $77M | 0.1% | 2026-Q2 |
| LPL Financial LLC trimmed | 157,094 | $76M | 0.1% | 2026-Q2 |
| TD Asset Management Inc added | 156,755 | $76M | 0.1% | 2026-Q2 |
| FRONTIER CAPITAL MANAGEMENT CO LLC trimmed | 154,601 | $75M | 0.1% | 2026-Q2 |
| RENAISSANCE TECHNOLOGIES LLC added | 153,400 | $74M | 0.1% | 2026-Q2 |
| NOMURA HOLDINGS INC added | 153,166 | $74M | 0.1% | 2026-Q2 |
| Forest Avenue Capital Management LP new | 149,320 | $72M | 0.1% | 2026-Q2 |
| Robeco Institutional Asset Management B.V. added | 144,163 | $70M | 0.1% | 2026-Q2 |
| Russell Investments Group, Ltd. added | 142,987 | $69M | 0.1% | 2026-Q2 |
| Greenhouse Funds LLLP trimmed | 134,562 | $65M | 0.1% | 2026-Q2 |
| VOYA INVESTMENT MANAGEMENT LLC added | 134,019 | $65M | 0.1% | 2026-Q2 |
| HSBC HOLDINGS PLC trimmed | 133,371 | $65M | 0.1% | 2026-Q2 |
Ownership over time
Tracked institutional holder count and total shares held by filing quarter (independent scales). The curated-era tail and any mid-ingest latest quarter are handled honestly — a partial quarter is not drawn as a collapse.
Reading this table
Funds hold the same stock for different reasons — an index fund “holds” almost everything, an active manager sizes a name to a mandate and a benchmark, and each fund entered at its own price and time. Because 13F is filed up to 45 days after quarter-end, every row is a backward-looking snapshot; a manager may have traded since. Share-class siblings (a company’s A and C shares) are rolled up to one line so a dual-class name is never double-counted. Compare like-for-like. A large holder is not an endorsement, and a fund exiting is not a warning — this is a starting question, not a verdict.
About 13F filings
A Form 13F is a quarterly disclosure that institutional investment managers with over $100 million in US-listed equities must file with the SEC. In plain English: it is a snapshot of the long stock positions a fund held at the end of a quarter. It covers long US-listed equities only — not short positions, options, cash, or private holdings — and the funds shown are the large sample we track, not the complete 13F universe.