Who owns QTRX (QTRX)
Which tracked institutional funds hold QTRX, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See QTRX 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 QTRX is one-sided between 2025-Q4 and 2026-Q1: 12 added or opened and 40 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
QTRX’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 QTRX more heavily than its largest holder by dollar value does.
Book-share is each fund’s reported value in QTRX 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 127 tracked filers holding QTRX, 70 increased or opened the position and 60 reduced or closed it; over the same quarter, there were no open-market insider Form 4s.
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 QTRX 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 6
- VANGUARD CAPITAL MANAGEMENT LLC$6M
- LEVIN CAPITAL STRATEGIES, L.P.$5M
- VANGUARD PORTFOLIO MANAGEMENT LLC$2M
- Topline Capital Management, LLC$2M
- Pier Capital, LLC$2M
- VANGUARD FIDUCIARY TRUST CO$952K
Full exits 4
- VANGUARD GROUP INC$17M
- EASTERLY INVESTMENT PARTNERS LLC$4M
- Aberdeen Group plc$662K
- TWO SIGMA ADVISERS, LP$553K
Largest adds
- MARSHALL WACE, LLP$1M
- First Eagle Investment Management, LLC$1M
- ENVESTNET ASSET MANAGEMENT INC$799K
- Russell Investments Group, Ltd.$631K
- Clearstead Advisors, LLC$437K
- RENAISSANCE TECHNOLOGIES LLC$404K
Largest trims
- AMERIPRISE FINANCIAL INC$19M
- Portolan Capital Management, LLC$18M
- BlackRock, Inc.$10M
- Blue Water Life Science Advisors, LP$6M
- WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC$6M
- GEODE CAPITAL MANAGEMENT, LLC$3M
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 |
|---|---|---|---|---|
| AMERIPRISE FINANCIAL INC trimmed | 3,542,374 | $12M | 7.1% | 2026-Q1 |
| BlackRock, Inc. trimmed | 3,277,595 | $12M | 6.5% | 2026-Q1 |
| Portolan Capital Management, LLC trimmed | 2,945,823 | $10M | 5.9% | 2026-Q1 |
| Blue Water Life Science Advisors, LP added | 2,142,147 | $8M | 4.3% | 2026-Q1 |
| WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC added | 2,083,699 | $7M | 4.1% | 2026-Q1 |
| Invenomic Capital Management LP added | 1,932,386 | $7M | 3.8% | 2026-Q1 |
| VANGUARD CAPITAL MANAGEMENT LLC new | 1,784,613 | $6M | 3.6% | 2026-Q1 |
| LEVIN CAPITAL STRATEGIES, L.P. added | 1,464,052 | $5M | 2.9% | 2026-Q1 |
| First Eagle Investment Management, LLC added | 1,300,087 | $5M | 2.6% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC trimmed | 994,764 | $4M | 2.0% | 2026-Q1 |
| Trium Capital LLP added | 994,217 | $3M | 2.0% | 2026-Q1 |
| STATE STREET CORP added | 898,277 | $3M | 1.8% | 2026-Q1 |
| Empire Financial Management Company, LLC added | 736,068 | $3M | 1.5% | 2026-Q1 |
| MILLENNIUM MANAGEMENT LLC added | 689,167 | $2M | 1.4% | 2026-Q1 |
| ENVESTNET ASSET MANAGEMENT INC added | 682,711 | $2M | 1.4% | 2026-Q1 |
| Russell Investments Group, Ltd. added | 641,981 | $2M | 1.3% | 2026-Q1 |
| MARSHALL WACE, LLP added | 620,711 | $2M | 1.2% | 2026-Q1 |
| Williams Jones Wealth Management, LLC. trimmed | 613,439 | $2M | 1.2% | 2026-Q1 |
| MORGAN STANLEY trimmed | 607,856 | $2M | 1.2% | 2026-Q1 |
| VANGUARD PORTFOLIO MANAGEMENT LLC new | 576,600 | $2M | 1.1% | 2026-Q1 |
| Tikvah Management LLC | 571,619 | $2M | 1.1% | 2026-Q1 |
| Topline Capital Management, LLC added | 563,135 | $2M | 1.1% | 2026-Q1 |
| Pier Capital, LLC trimmed | 492,368 | $2M | 1.0% | 2026-Q1 |
| DIMENSIONAL FUND ADVISORS LP added | 443,118 | $2M | 0.9% | 2026-Q1 |
| UBS Group AG added | 376,982 | $1M | 0.8% | 2026-Q1 |
| NORTHERN TRUST CORP added | 349,658 | $1M | 0.7% | 2026-Q1 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC trimmed | 345,913 | $1M | 0.7% | 2026-Q1 |
| Parkman Healthcare Partners LLC added | 341,453 | $1M | 0.7% | 2026-Q1 |
| TUDOR INVESTMENT CORP ET AL added | 316,001 | $1M | 0.6% | 2026-Q1 |
| VANGUARD FIDUCIARY TRUST CO new | 270,529 | $952K | 0.5% | 2026-Q1 |
| GOLDMAN SACHS GROUP INC added | 270,187 | $951K | 0.5% | 2026-Q1 |
| ROYAL BANK OF CANADA added | 232,101 | $817K | 0.5% | 2026-Q1 |
| FMR LLC added | 183,356 | $645K | 0.4% | 2026-Q1 |
| IRONWOOD INVESTMENT MANAGEMENT LLC trimmed | 169,825 | $598K | 0.3% | 2026-Q1 |
| JANE STREET GROUP, LLC added | 155,655 | $548K | 0.3% | 2026-Q1 |
| RENAISSANCE TECHNOLOGIES LLC added | 136,207 | $479K | 0.3% | 2026-Q1 |
| BNP PARIBAS FINANCIAL MARKETS trimmed | 134,403 | $473K | 0.3% | 2026-Q1 |
| WELLS FARGO & COMPANY/MN trimmed | 129,024 | $454K | 0.3% | 2026-Q1 |
| Bank of New York Mellon Corp added | 126,363 | $445K | 0.3% | 2026-Q1 |
| Clearstead Advisors, LLC added | 124,120 | $437K | 0.2% | 2026-Q1 |
| SCS Capital Management LLC | 120,035 | $423K | 0.2% | 2026-Q1 |
| Invesco Ltd. added | 116,216 | $409K | 0.2% | 2026-Q1 |
| XTX Topco Ltd added | 111,660 | $393K | 0.2% | 2026-Q1 |
| AMERICAN CENTURY COMPANIES INC trimmed | 101,810 | $358K | 0.2% | 2026-Q1 |
| GSA CAPITAL PARTNERS LLP trimmed | 95,528 | $336K | 0.2% | 2026-Q1 |
| Point72 Asset Management, L.P. added | 93,253 | $328K | 0.2% | 2026-Q1 |
| Brevan Howard Capital Management LP added | 87,386 | $308K | 0.2% | 2026-Q1 |
| AQR CAPITAL MANAGEMENT LLC added | 84,132 | $296K | 0.2% | 2026-Q1 |
| STATE OF WISCONSIN INVESTMENT BOARD trimmed | 84,124 | $296K | 0.2% | 2026-Q1 |
| ALLIANCEBERNSTEIN L.P. | 44,480 | $283K | 0.2% | 2026-Q1 |
| Dynamic Technology Lab Private Ltd added | 77,871 | $274K | 0.2% | 2026-Q1 |
| Nuveen, LLC added | 71,842 | $253K | 0.1% | 2026-Q1 |
| HRT FINANCIAL LP added | 71,686 | $252K | 0.1% | 2026-Q1 |
| PRICE T ROWE ASSOCIATES INC /MD/ added | 68,372 | $241K | 0.1% | 2026-Q1 |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC added | 68,226 | $240K | 0.1% | 2026-Q1 |
| CITADEL ADVISORS LLC trimmed | 61,001 | $215K | 0.1% | 2026-Q1 |
| PEDDOCK CAPITAL ADVISORS, LLC | 52,105 | $183K | 0.1% | 2026-Q1 |
| RHUMBLINE ADVISERS trimmed | 52,065 | $183K | 0.1% | 2026-Q1 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP trimmed | 50,719 | $179K | 0.1% | 2026-Q1 |
| BANK OF AMERICA CORP /DE/ added | 49,552 | $174K | 0.1% | 2026-Q1 |
| PDT Partners, LLC | 47,668 | $168K | 0.1% | 2026-Q1 |
| Quantinno Capital Management LP trimmed | 47,594 | $168K | 0.1% | 2026-Q1 |
| Schonfeld Strategic Advisors LLC trimmed | 42,786 | $151K | 0.1% | 2026-Q1 |
| FOX RUN MANAGEMENT, L.L.C. trimmed | 39,592 | $136K | 0.1% | 2026-Q1 |
| DEUTSCHE BANK AG\ added | 35,460 | $125K | 0.1% | 2026-Q1 |
| TWO SIGMA INVESTMENTS, LP trimmed | 35,185 | $124K | 0.1% | 2026-Q1 |
| VANGUARD GROUP INC added | 2,677,833 | $17M | 9.6% | 2025-Q4 stale |
| Kent Lake PR LLC trimmed | 1,001,000 | $5M | 3.1% | 2025-Q3 stale |
| BALYASNY ASSET MANAGEMENT L.P. added | 767,801 | $5M | 2.9% | 2025-Q2 stale |
| BAILLIE GIFFORD & CO | 600,812 | $4M | 2.3% | 2025-Q2 stale |
| EASTERLY INVESTMENT PARTNERS LLC trimmed | 616,681 | $4M | 2.2% | 2025-Q4 stale |
| ASHFORD CAPITAL MANAGEMENT INC trimmed | 436,930 | $3M | 1.6% | 2025-Q1 stale |
| Cubist Systematic Strategies, LLC added | 314,418 | $2M | 1.0% | 2025-Q3 stale |
| Walleye Capital LLC added | 179,389 | $1M | 0.7% | 2025-Q1 stale |
| Valmark Advisers, Inc. trimmed | 105,382 | $701K | 0.4% | 2025-Q2 stale |
| Aberdeen Group plc trimmed | 104,039 | $662K | 0.4% | 2025-Q4 stale |
| WEXFORD CAPITAL LP new | 100,000 | $651K | 0.4% | 2025-Q1 stale |
| TWO SIGMA ADVISERS, LP trimmed | 86,890 | $553K | 0.3% | 2025-Q4 stale |
| MARATHON CAPITAL MANAGEMENT trimmed | 74,300 | $484K | 0.3% | 2025-Q1 stale |
| Boussard & Gavaudan Investment Management LLP | 71,671 | $457K | 0.3% | 2025-Q2 stale |
| Graypoint LLC | 65,000 | $432K | 0.2% | 2025-Q2 stale |
| Clarius Group, LLC | 62,060 | $395K | 0.2% | 2025-Q4 stale |
| Limestone Investment Advisors LP new | 56,067 | $373K | 0.2% | 2025-Q2 stale |
| Mount Lucas Management LP trimmed | 56,500 | $359K | 0.2% | 2025-Q4 stale |
| Susquehanna Portfolio Strategies, LLC trimmed | 55,150 | $351K | 0.2% | 2025-Q4 stale |
| ALGERT GLOBAL LLC trimmed | 46,988 | $306K | 0.2% | 2025-Q1 stale |
| Massar Capital Management, LP new | 46,000 | $299K | 0.2% | 2025-Q1 stale |
| D. E. Shaw & Co., Inc. trimmed | 45,627 | $290K | 0.2% | 2025-Q4 stale |
| CREDIT INDUSTRIEL ET COMMERCIAL | 35,000 | $233K | 0.1% | 2025-Q2 stale |
| Janney Capital Management LLC trimmed | 32,360 | $215K | 0.1% | 2025-Q2 stale |
| EntryPoint Capital, LLC trimmed | 31,041 | $202K | 0.1% | 2025-Q1 stale |
| PharVision Advisers, LLC new | 36,144 | $196K | 0.1% | 2025-Q3 stale |
| Nebula Research & Development LLC trimmed | 29,145 | $194K | 0.1% | 2025-Q2 stale |
| Numerai GP LLC trimmed | 29,762 | $189K | 0.1% | 2025-Q4 stale |
| EMERALD ADVISERS, LLC trimmed | 25,542 | $166K | 0.1% | 2025-Q1 stale |
| PARAGON ASSOCIATES & PARAGON ASSOCIATES II JOINT VENTURE trimmed | 25,000 | $159K | 0.1% | 2025-Q4 stale |
| ExodusPoint Capital Management, LP trimmed | 24,080 | $153K | 0.1% | 2025-Q4 stale |
| Verition Fund Management LLC trimmed | 23,331 | $152K | 0.1% | 2025-Q1 stale |
| Quadrature Capital Ltd added | 21,707 | $138K | 0.1% | 2025-Q4 stale |
| FRANKLIN RESOURCES INC trimmed | 20,273 | $132K | 0.1% | 2025-Q1 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.