Who owns XMTR
Which tracked institutional funds hold XMTR, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See XMTR 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 XMTR is one-sided between 2026-Q1 and 2026-Q2: 166 added or opened and 23 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
XMTR’s largest tracked holder by dollar value, PRIMECAP MANAGEMENT CO/CA/, sizes it at 0.4% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 0.3pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in XMTR 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 282 tracked filers holding XMTR, 167 increased or opened the position and 135 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 XMTR 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 29
- SIEMENS AG$101M
- D. E. Shaw & Co., Inc.$35M
- RENAISSANCE TECHNOLOGIES LLC$14M
- SEVEN GRAND MANAGERS, LLC$12M
- Lisanti Capital Growth, LLC$10M
- AustralianSuper Pty Ltd$8M
Full exits 12
- LORD, ABBETT & CO. LLC$5M
- Metavasi Capital LP$5M
- CONGRESS ASSET MANAGEMENT CO$1M
- Engineers Gate Manager LP$1M
- Magnetar Financial LLC$1M
- POLEN CAPITAL MANAGEMENT LLC$1M
Largest adds
- PRIMECAP MANAGEMENT CO/CA/$375M
- FMR LLC$252M
- BlackRock, Inc.$228M
- Hood River Capital Management LLC$146M
- VANGUARD CAPITAL MANAGEMENT LLC$117M
- VANGUARD PORTFOLIO MANAGEMENT LLC$116M
Largest trims
- CenterBook Partners LP$10M
- SYLEBRA CAPITAL LLC$5M
- Divisadero Street Capital Management, LP$3M
- AMERIPRISE FINANCIAL INC$2M
- Roubaix Capital, LLC$1M
- ALGERT GLOBAL LLC$1M
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 |
|---|---|---|---|---|
| PRIMECAP MANAGEMENT CO/CA/ added | 6,636,057 | $641M | 12.3% | 2026-Q2 |
| FMR LLC added | 3,918,177 | $378M | 7.3% | 2026-Q2 |
| BlackRock, Inc. added | 3,838,343 | $370M | 7.1% | 2026-Q2 |
| Ewing Morris & Co. Investment Partners Ltd. new | 2,600,000 | $5M | 0.1% | 2026-Q2 |
| EVENTIDE ASSET MANAGEMENT, LLC trimmed | 2,151,845 | $208M | 4.0% | 2026-Q2 |
| VANGUARD CAPITAL MANAGEMENT LLC added | 2,047,813 | $198M | 3.8% | 2026-Q2 |
| VANGUARD PORTFOLIO MANAGEMENT LLC added | 2,035,884 | $197M | 3.8% | 2026-Q2 |
| Hood River Capital Management LLC added | 1,988,360 | $192M | 3.7% | 2026-Q2 |
| Driehaus Capital Management LLC added | 1,768,213 | $171M | 3.3% | 2026-Q2 |
| FIRST TRUST ADVISORS LP added | 1,743,499 | $168M | 3.2% | 2026-Q2 |
| FULLER & THALER ASSET MANAGEMENT, INC. added | 1,430,549 | $138M | 2.6% | 2026-Q2 |
| WELLINGTON MANAGEMENT GROUP LLP added | 1,322,581 | $128M | 2.4% | 2026-Q2 |
| GEODE CAPITAL MANAGEMENT, LLC added | 1,224,198 | $118M | 2.3% | 2026-Q2 |
| STATE STREET CORP added | 1,104,198 | $107M | 2.0% | 2026-Q2 |
| SIEMENS AG new | 1,049,759 | $101M | 1.9% | 2026-Q2 |
| BAILLIE GIFFORD & CO trimmed | 1,018,568 | $98M | 1.9% | 2026-Q2 |
| Durable Capital Partners LP added | 1,014,976 | $98M | 1.9% | 2026-Q2 |
| GILDER GAGNON HOWE & CO LLC trimmed | 857,146 | $83M | 1.6% | 2026-Q2 |
| AMERIPRISE FINANCIAL INC trimmed | 847,510 | $82M | 1.6% | 2026-Q2 |
| Stephens Investment Management Group LLC added | 799,180 | $77M | 1.5% | 2026-Q2 |
| UBS Group AG added | 771,312 | $74M | 1.4% | 2026-Q2 |
| Clearbridge Investments, LLC added | 742,196 | $72M | 1.4% | 2026-Q2 |
| Invesco Ltd. added | 729,602 | $70M | 1.4% | 2026-Q2 |
| NEXT CENTURY GROWTH INVESTORS LLC trimmed | 723,351 | $70M | 1.3% | 2026-Q2 |
| JANE STREET GROUP, LLC added | 722,361 | $70M | 1.3% | 2026-Q2 |
| Allspring Global Investments Holdings, LLC trimmed | 643,596 | $62M | 1.2% | 2026-Q2 |
| GOLDMAN SACHS GROUP INC added | 535,961 | $52M | 1.0% | 2026-Q2 |
| PRICE T ROWE ASSOCIATES INC /MD/ added | 500,548 | $48M | 0.9% | 2026-Q2 |
| FRED ALGER MANAGEMENT, LLC trimmed | 483,884 | $47M | 0.9% | 2026-Q2 |
| SUMMIT PARTNERS PUBLIC ASSET MANAGEMENT, LLC trimmed | 469,000 | $45M | 0.9% | 2026-Q2 |
| NORTHERN TRUST CORP added | 445,097 | $43M | 0.8% | 2026-Q2 |
| JPMORGAN CHASE & CO trimmed | 436,865 | $41M | 0.8% | 2026-Q2 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC added | 406,658 | $39M | 0.8% | 2026-Q2 |
| D. E. Shaw & Co., Inc. added | 361,416 | $35M | 0.7% | 2026-Q2 |
| BNP PARIBAS FINANCIAL MARKETS added | 344,893 | $33M | 0.6% | 2026-Q2 |
| MORGAN STANLEY added | 344,885 | $33M | 0.6% | 2026-Q2 |
| VANGUARD FIDUCIARY TRUST CO added | 339,346 | $33M | 0.6% | 2026-Q2 |
| G2 Investment Partners Management LLC trimmed | 318,424 | $31M | 0.6% | 2026-Q2 |
| SEI INVESTMENTS CO added | 300,893 | $29M | 0.6% | 2026-Q2 |
| BLAIR WILLIAM & CO/IL trimmed | 288,858 | $28M | 0.5% | 2026-Q2 |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. trimmed | 281,843 | $27M | 0.5% | 2026-Q2 |
| RAYMOND JAMES FINANCIAL INC added | 267,587 | $26M | 0.5% | 2026-Q2 |
| BROWN CAPITAL MANAGEMENT LLC trimmed | 259,008 | $25M | 0.5% | 2026-Q2 |
| Bellecapital International Ltd. trimmed | 254,883 | $25M | 0.5% | 2026-Q2 |
| Capital International Investors added | 240,568 | $23M | 0.4% | 2026-Q2 |
| Nuveen, LLC trimmed | 230,398 | $22M | 0.4% | 2026-Q2 |
| CAPTRUST FINANCIAL ADVISORS added | 226,925 | $22M | 0.4% | 2026-Q2 |
| BANK OF AMERICA CORP /DE/ trimmed | 207,911 | $20M | 0.4% | 2026-Q2 |
| CITIGROUP INC added | 206,030 | $20M | 0.4% | 2026-Q2 |
| TWO SIGMA INVESTMENTS, LP trimmed | 205,888 | $20M | 0.4% | 2026-Q2 |
| MILLENNIUM MANAGEMENT LLC added | 203,953 | $20M | 0.4% | 2026-Q2 |
| Ophir Asset Management Pty Ltd added | 184,976 | $18M | 0.3% | 2026-Q2 |
| Vitruvian Partners LLP trimmed | 181,169 | $17M | 0.3% | 2026-Q2 |
| SYLEBRA CAPITAL LLC trimmed | 173,126 | $17M | 0.3% | 2026-Q2 |
| SCHWERIN BOYLE CAPITAL MANAGEMENT INC | 151,127 | $15M | 0.3% | 2026-Q2 |
| Universal- Beteiligungs- und Servicegesellschaft mbH added | 150,877 | $15M | 0.3% | 2026-Q2 |
| TORONTO DOMINION BANK trimmed | 143,227 | $14M | 0.3% | 2026-Q2 |
| RENAISSANCE TECHNOLOGIES LLC added | 141,500 | $14M | 0.3% | 2026-Q2 |
| ZEVENBERGEN CAPITAL INVESTMENTS LLC added | 138,325 | $13M | 0.3% | 2026-Q2 |
| Bank of New York Mellon Corp added | 137,248 | $13M | 0.3% | 2026-Q2 |
| PEREGRINE INVESTMENT MANAGEMENT INC trimmed | 136,000 | $13M | 0.3% | 2026-Q2 |
| Cerity Partners LLC trimmed | 129,574 | $13M | 0.2% | 2026-Q2 |
| SEVEN GRAND MANAGERS, LLC new | 125,000 | $12M | 0.2% | 2026-Q2 |
| Connor, Clark & Lunn Investment Management Ltd. trimmed | 120,687 | $12M | 0.2% | 2026-Q2 |
| Russell Investments Group, Ltd. added | 120,221 | $12M | 0.2% | 2026-Q2 |
| CASTLEARK MANAGEMENT LLC added | 117,518 | $11M | 0.2% | 2026-Q2 |
| Marathon Partners Equity Management, LLC trimmed | 113,000 | $11M | 0.2% | 2026-Q2 |
| Faithward Advisors, LLC trimmed | 111,445 | $11M | 0.2% | 2026-Q2 |
| Zweig-DiMenna Associates LLC | 102,650 | $10M | 0.2% | 2026-Q2 |
| Lisanti Capital Growth, LLC added | 100,880 | $10M | 0.2% | 2026-Q2 |
| Swiss National Bank trimmed | 88,400 | $9M | 0.2% | 2026-Q2 |
| BOOTHBAY FUND MANAGEMENT, LLC added | 87,947 | $8M | 0.2% | 2026-Q2 |
| ROYAL BANK OF CANADA added | 87,661 | $8M | 0.2% | 2026-Q2 |
| ALGERT GLOBAL LLC trimmed | 87,192 | $8M | 0.2% | 2026-Q2 |
| PICTON MAHONEY ASSET MANAGEMENT added | 87,089 | $8M | 0.2% | 2026-Q2 |
| KORNITZER CAPITAL MANAGEMENT INC /KS added | 86,755 | $8M | 0.2% | 2026-Q2 |
| BARCLAYS PLC trimmed | 84,295 | $8M | 0.2% | 2026-Q2 |
| Polar Capital Holdings Plc added | 83,248 | $8M | 0.2% | 2026-Q2 |
| DIMENSIONAL FUND ADVISORS LP trimmed | 81,934 | $8M | 0.2% | 2026-Q2 |
| AustralianSuper Pty Ltd new | 80,400 | $8M | 0.1% | 2026-Q2 |
| NEW YORK STATE COMMON RETIREMENT FUND added | 78,679 | $8M | 0.1% | 2026-Q2 |
| HBK Sorce Advisory LLC trimmed | 77,740 | $7M | 0.1% | 2026-Q2 |
| Calamos Advisors LLC new | 76,014 | $7M | 0.1% | 2026-Q2 |
| PDT Partners, LLC trimmed | 75,063 | $7M | 0.1% | 2026-Q2 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC added | 74,658 | $7M | 0.1% | 2026-Q2 |
| CITADEL ADVISORS LLC trimmed | 74,052 | $7M | 0.1% | 2026-Q2 |
| Portolan Capital Management, LLC new | 73,163 | $7M | 0.1% | 2026-Q2 |
| PRINCIPAL FINANCIAL GROUP INC trimmed | 68,762 | $7M | 0.1% | 2026-Q2 |
| WELLS FARGO & COMPANY/MN added | 62,105 | $6M | 0.1% | 2026-Q2 |
| Informed Momentum Co LLC trimmed | 59,984 | $6M | 0.1% | 2026-Q2 |
| RHUMBLINE ADVISERS added | 58,113 | $6M | 0.1% | 2026-Q2 |
| AMERICAN CENTURY COMPANIES INC added | 56,218 | $5M | 0.1% | 2026-Q2 |
| ESSEX INVESTMENT MANAGEMENT CO LLC new | 55,919 | $5M | 0.1% | 2026-Q2 |
| Roubaix Capital, LLC trimmed | 55,034 | $5M | 0.1% | 2026-Q2 |
| Legato Capital Management LLC added | 54,861 | $5M | 0.1% | 2026-Q2 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM trimmed | 50,786 | $5M | 0.1% | 2026-Q2 |
| Qube Research & Technologies Ltd added | 50,400 | $5M | 0.1% | 2026-Q2 |
| DEUTSCHE BANK AG\ added | 47,963 | $5M | 0.1% | 2026-Q2 |
| Sivia Capital Partners, LLC new | 47,058 | $5M | 0.1% | 2026-Q2 |
| ARK Investment Management LLC added | 46,048 | $4M | 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.