Who owns ACHR (ACHR)
Which tracked institutional funds hold ACHR, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See ACHR company fundamentals →
Ownership as of the 2026-Q1 13F filings. 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 ACHR is one-sided between 2025-Q4 and 2026-Q1: 37 added or opened and 154 trimmed or exited — on balance reducing.
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
ACHR’s largest tracked holder by dollar value, VANGUARD GROUP INC, sizes it at 0.0% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 0.0pp gap the other way — the median holder sizes ACHR more heavily than its largest holder by dollar value does.
Book-share is each fund’s reported value in ACHR 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 2025-Q4 and 2026-Q1, across 532 tracked filers holding ACHR, 257 increased or opened the position and 255 reduced or closed it; over the same quarter, open-market insider Form 4 buying and selling roughly offset.
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 ACHR between the 2025-Q4 and 2026-Q1 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 16
- VANGUARD CAPITAL MANAGEMENT LLC$127M
- VANGUARD PORTFOLIO MANAGEMENT LLC$119M
- VANGUARD FIDUCIARY TRUST CO$22M
- VOLORIDGE INVESTMENT MANAGEMENT, LLC$9M
- Defiance ETFs, LLC$4M
- Penserra Capital Management LLC$4M
Full exits 29
- VANGUARD GROUP INC$405M
- NORGES BANK$58M
- BURKEHILL GLOBAL MANAGEMENT, LP$24M
- Trexquant Investment LP$11M
- MASTERS CAPITAL MANAGEMENT LLC$8M
- WELLINGTON MANAGEMENT GROUP LLP$7M
Largest adds
- SUSQUEHANNA INTERNATIONAL GROUP, LLP$18M
- HRT FINANCIAL LP$11M
- RENAISSANCE TECHNOLOGIES LLC$11M
- Aquatic Capital Management LLC$10M
- UBS Group AG$10M
- MARSHALL WACE, LLP$9M
Largest trims
- BlackRock, Inc.$263M
- ARK Investment Management LLC$71M
- MORGAN STANLEY$64M
- Blackstone Inc.$33M
- GEODE CAPITAL MANAGEMENT, LLC$32M
- BNP PARIBAS FINANCIAL MARKETS$32M
Institutional holders
One row per tracked fund, largest reported value first. “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding. Rows marked stale are from an earlier filing than the security’s latest quarter — that fund is absent from the newest snapshot (position exited, or reported under a different name).
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| STATE STREET CORP added | 43,644,580 | $226M | 10.0% | 2026-Q1 |
| ARK Investment Management LLC added | 37,437,062 | $194M | 8.5% | 2026-Q1 |
| BlackRock, Inc. trimmed | 32,623,460 | $169M | 7.5% | 2026-Q1 |
| VANGUARD CAPITAL MANAGEMENT LLC new | 24,545,543 | $127M | 5.6% | 2026-Q1 |
| VANGUARD PORTFOLIO MANAGEMENT LLC new | 23,073,534 | $119M | 5.3% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC added | 14,642,283 | $76M | 3.3% | 2026-Q1 |
| MORGAN STANLEY trimmed | 10,475,202 | $54M | 2.4% | 2026-Q1 |
| Amova Asset Management Americas, Inc. trimmed | 7,651,742 | $40M | 1.7% | 2026-Q1 |
| Sumitomo Mitsui Trust Group, Inc. trimmed | 7,651,742 | $40M | 1.7% | 2026-Q1 |
| GOLDMAN SACHS GROUP INC trimmed | 5,756,736 | $30M | 1.3% | 2026-Q1 |
| Alpine Global Management, LLC added | 5,631,660 | $29M | 1.3% | 2026-Q1 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC trimmed | 5,400,455 | $28M | 1.2% | 2026-Q1 |
| UBS Group AG added | 5,202,200 | $27M | 1.2% | 2026-Q1 |
| NORTHERN TRUST CORP trimmed | 5,124,142 | $26M | 1.2% | 2026-Q1 |
| Blackstone Inc. trimmed | 5,052,302 | $26M | 1.2% | 2026-Q1 |
| Alyeska Investment Group, L.P. trimmed | 4,732,944 | $24M | 1.1% | 2026-Q1 |
| VOYA INVESTMENT MANAGEMENT LLC added | 4,579,891 | $24M | 1.0% | 2026-Q1 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP added | 4,571,650 | $24M | 1.0% | 2026-Q1 |
| VANGUARD FIDUCIARY TRUST CO new | 4,194,823 | $22M | 1.0% | 2026-Q1 |
| HRT FINANCIAL LP added | 3,262,298 | $17M | 0.7% | 2026-Q1 |
| United Airlines Holdings, Inc. | 3,165,737 | $16M | 0.7% | 2026-Q1 |
| CITADEL ADVISORS LLC added | 2,924,048 | $15M | 0.7% | 2026-Q1 |
| Clear Street Group Inc. added | 2,853,078 | $15M | 0.7% | 2026-Q1 |
| RENAISSANCE TECHNOLOGIES LLC added | 2,514,300 | $13M | 0.6% | 2026-Q1 |
| Aquatic Capital Management LLC added | 2,284,971 | $12M | 0.5% | 2026-Q1 |
| MARSHALL WACE, LLP added | 2,256,172 | $12M | 0.5% | 2026-Q1 |
| BANK OF AMERICA CORP /DE/ added | 2,136,942 | $11M | 0.5% | 2026-Q1 |
| Nuveen, LLC added | 2,089,450 | $11M | 0.5% | 2026-Q1 |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC added | 1,823,911 | $9M | 0.4% | 2026-Q1 |
| Bank of New York Mellon Corp trimmed | 1,755,870 | $9M | 0.4% | 2026-Q1 |
| IQ EQ FUND MANAGEMENT (IRELAND) Ltd added | 1,718,144 | $9M | 0.4% | 2026-Q1 |
| SEVEN GRAND MANAGERS, LLC trimmed | 1,500,000 | $8M | 0.3% | 2026-Q1 |
| Granahan Investment Management, LLC trimmed | 1,480,746 | $8M | 0.3% | 2026-Q1 |
| Invesco Ltd. trimmed | 1,300,311 | $7M | 0.3% | 2026-Q1 |
| BNP PARIBAS FINANCIAL MARKETS trimmed | 1,296,126 | $7M | 0.3% | 2026-Q1 |
| Swiss National Bank added | 1,221,700 | $6M | 0.3% | 2026-Q1 |
| WELLS FARGO & COMPANY/MN added | 1,198,639 | $6M | 0.3% | 2026-Q1 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC trimmed | 1,121,348 | $6M | 0.3% | 2026-Q1 |
| JANE STREET GROUP, LLC added | 1,116,648 | $6M | 0.3% | 2026-Q1 |
| INFINITUM ASSET MANAGEMENT, LLC | 1,112,187 | $6M | 0.3% | 2026-Q1 |
| RAYMOND JAMES FINANCIAL INC added | 1,071,568 | $6M | 0.2% | 2026-Q1 |
| Alta Fundamental Advisers LLC trimmed | 1,068,333 | $6M | 0.2% | 2026-Q1 |
| Generali Powszechne Towarzystwo Emerytalne | 1,000,000 | $5M | 0.2% | 2026-Q1 |
| HBK INVESTMENTS L P trimmed | 1,000,000 | $5M | 0.2% | 2026-Q1 |
| ALLIANCEBERNSTEIN L.P. trimmed | 650,850 | $5M | 0.2% | 2026-Q1 |
| SORA INVESTORS LLC added | 927,628 | $5M | 0.2% | 2026-Q1 |
| GROUP ONE TRADING LLC added | 917,726 | $5M | 0.2% | 2026-Q1 |
| LPL Financial LLC added | 837,306 | $4M | 0.2% | 2026-Q1 |
| CITIGROUP INC added | 819,936 | $4M | 0.2% | 2026-Q1 |
| Defiance ETFs, LLC new | 817,342 | $4M | 0.2% | 2026-Q1 |
| Penserra Capital Management LLC added | 813,247 | $4M | 0.2% | 2026-Q1 |
| Cetera Investment Advisers added | 792,532 | $4M | 0.2% | 2026-Q1 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM added | 716,066 | $4M | 0.2% | 2026-Q1 |
| RHUMBLINE ADVISERS trimmed | 705,483 | $4M | 0.2% | 2026-Q1 |
| MIC Capital Management UK LLP | 700,000 | $4M | 0.2% | 2026-Q1 |
| Rheos Capital Works Inc. added | 700,000 | $4M | 0.2% | 2026-Q1 |
| PRICE T ROWE ASSOCIATES INC /MD/ trimmed | 687,381 | $4M | 0.2% | 2026-Q1 |
| FMR LLC trimmed | 680,699 | $4M | 0.2% | 2026-Q1 |
| BALYASNY ASSET MANAGEMENT L.P. trimmed | 620,764 | $3M | 0.1% | 2026-Q1 |
| DEUTSCHE BANK AG\ added | 615,584 | $3M | 0.1% | 2026-Q1 |
| 1248 Management, LLC | 614,628 | $3M | 0.1% | 2026-Q1 |
| Legal & General Group Plc trimmed | 573,154 | $3M | 0.1% | 2026-Q1 |
| HSBC HOLDINGS PLC added | 568,861 | $3M | 0.1% | 2026-Q1 |
| JPMORGAN CHASE & CO trimmed | 589,498 | $3M | 0.1% | 2026-Q1 |
| Intellectus Partners, LLC added | 539,296 | $3M | 0.1% | 2026-Q1 |
| CAPITAL FUND MANAGEMENT S.A. trimmed | 521,061 | $3M | 0.1% | 2026-Q1 |
| Covalis Capital LLP trimmed | 500,000 | $3M | 0.1% | 2026-Q1 |
| Walleye Trading LLC trimmed | 492,582 | $3M | 0.1% | 2026-Q1 |
| Holocene Advisors, LP added | 486,957 | $3M | 0.1% | 2026-Q1 |
| Virtu Financial LLC added | 486,786 | $3M | 0.1% | 2026-Q1 |
| STIFEL FINANCIAL CORP added | 477,499 | $2M | 0.1% | 2026-Q1 |
| IMC-Chicago, LLC added | 475,196 | $2M | 0.1% | 2026-Q1 |
| Yarbrough Capital, LLC | 466,798 | $2M | 0.1% | 2026-Q1 |
| VANGUARD ASSET MANAGEMENT, Ltd new | 461,462 | $2M | 0.1% | 2026-Q1 |
| SG Americas Securities, LLC trimmed | 385,121 | $2M | 0.1% | 2026-Q1 |
| VANGUARD GROUP INC added | 53,840,969 | $405M | 17.9% | 2025-Q4 stale |
| NORGES BANK new | 7,778,447 | $58M | 2.6% | 2025-Q4 stale |
| HEIGHTS CAPITAL MANAGEMENT, INC new | 2,312,285 | $25M | 1.1% | 2025-Q2 stale |
| BURKEHILL GLOBAL MANAGEMENT, LP added | 3,125,000 | $24M | 1.0% | 2025-Q4 stale |
| Driehaus Capital Management LLC new | 1,374,198 | $15M | 0.7% | 2025-Q2 stale |
| TUDOR INVESTMENT CORP ET AL added | 1,703,379 | $12M | 0.5% | 2025-Q1 stale |
| Trexquant Investment LP added | 1,476,022 | $11M | 0.5% | 2025-Q4 stale |
| Science & Technology Partners, L.P. added | 1,282,000 | $9M | 0.4% | 2025-Q1 stale |
| Monashee Investment Management LLC added | 800,000 | $9M | 0.4% | 2025-Q2 stale |
| MASTERS CAPITAL MANAGEMENT LLC trimmed | 999,600 | $8M | 0.3% | 2025-Q4 stale |
| WELLINGTON MANAGEMENT GROUP LLP trimmed | 933,428 | $7M | 0.3% | 2025-Q4 stale |
| Engineers Gate Manager LP added | 885,194 | $7M | 0.3% | 2025-Q4 stale |
| Allianz Asset Management GmbH added | 671,563 | $5M | 0.2% | 2025-Q4 stale |
| Jump Financial, LLC trimmed | 566,914 | $4M | 0.2% | 2025-Q4 stale |
| ExodusPoint Capital Management, LP added | 507,779 | $4M | 0.2% | 2025-Q4 stale |
| Ghisallo Capital Management LLC trimmed | 500,000 | $4M | 0.2% | 2025-Q4 stale |
| Allspring Global Investments Holdings, LLC new | 345,654 | $4M | 0.2% | 2025-Q2 stale |
| Informed Momentum Co LLC added | 309,146 | $3M | 0.1% | 2025-Q2 stale |
| Twin Tree Management, LP trimmed | 355,751 | $3M | 0.1% | 2025-Q4 stale |
| ADAGE CAPITAL PARTNERS GP, L.L.C. trimmed | 350,000 | $3M | 0.1% | 2025-Q4 stale |
| Yorkville Advisors Global, LP new | 340,000 | $3M | 0.1% | 2025-Q4 stale |
| MATAURO, LLC trimmed | 320,347 | $2M | 0.1% | 2025-Q4 stale |
| Jain Global LLC new | 287,485 | $2M | 0.1% | 2025-Q1 stale |
| TWO SIGMA ADVISERS, LP trimmed | 275,400 | $2M | 0.1% | 2025-Q1 stale |
| Bulltick Wealth Management, LLC added | 180,000 | $2M | 0.1% | 2025-Q2 stale |
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.