The public view is the crawlable proof. The same sourced dataset is available through REST and MCP for agents, research scripts, and back-office tools.
This stock page is the Follow view. The Build view lets your agent query QTRX owners, fund changes, insider filings, and source links through REST or MCP.
curl -H "Authorization: Bearer YOUR_API_KEY" \ "https://arkolith.com/api/v1/stocks/QTRX"
Use Arkolith to show who owns QTRX, which funds added or reduced it, and which SEC filings prove each claim.
| # | Fund | Position value | Shares | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | VANGUARD GROUP INC | $17.0M | 2.7M | ▲+1.1% Added · +30K sh | Q4 2025 | |
| 2 | BlackRock, Inc. | $11.5M | 3.3M | ▼−2.9% Reduced · −98K sh | Q1 2026 | |
| 3 | Portolan Capital Management, LLC | $10.4M | 2.9M | ▼−35% Reduced · −1.6M sh | Q1 2026 | |
| 4 | WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC | $7.3M | 2.1M | ▲+1.8% Added · +37K sh | Q1 2026 | |
| 5 | Invenomic Capital Management LP | $6.8M | 1.9M | ▲+28% Added · +427K sh | Q1 2026 | |
| 6 | First Eagle Investment Management, LLC | $4.6M | 1.3M | ▲+145% Added · +769K sh | Q1 2026 | |
| 7 | GEODE CAPITAL MANAGEMENT, LLC | $3.5M | 995K | ▼−7.4% Reduced · −79K sh | Q1 2026 | |
| 8 | STATE STREET CORP | $3.2M | 898K | ▲+0.5% Added · +5K sh | Q1 2026 | |
| 9 | Williams Jones Wealth Management, LLC. | $2.2M | 613K | ▼−4.0% Reduced · −26K sh | Q1 2026 | |
| 10 | VANGUARD PORTFOLIO MANAGEMENT LLC | $2.0M | 577K | ▲New +577K sh | Q1 2026 | |
| 11 | TUDOR INVESTMENT CORP ET AL | $1.1M | 316K | ▲+86% Added · +146K sh | Q1 2026 | |
| 12 | VANGUARD FIDUCIARY TRUST CO | $952K | 271K | ▲New +271K sh | Q1 2026 | |
| 13 | FMR LLC | $645K | 183K | ▲+15% Added · +23K sh | Q1 2026 | |
| 14 | Clearstead Advisors, LLC | $437K | 124K | ▲25k× Added · +124K sh | Q1 2026 | |
| 15 | SCS Capital Management LLC | $423K | 120K | —Held | Q1 2026 | |
| 16 | Point72 Asset Management, L.P. | $328K | 93K | ▲New +93K sh | Q1 2026 | |
| 17 | BRIDGEWAY CAPITAL MANAGEMENT, LLC | $240K | 68K | ▲+59% Added · +25K sh | Q1 2026 | |
| 18 | CITADEL ADVISORS LLC | $215K | 61K | ▼−38% Reduced · −38K sh | Q1 2026 | |
| 19 | Schonfeld Strategic Advisors LLC | $151K | 43K | ▼−31% Reduced · −19K sh | Q1 2026 | |
| 20 | Engineers Gate Manager LP | $84K | 24K | ▲New +24K sh | Q1 2026 | |
| 21 | MetLife Investment Management, LLC | $79K | 23K | ▲+41% Added · +7K sh | Q1 2026 | |
| 22 | Allspring Global Investments Holdings, LLC | $61K | 17K | ▲+11% Added · +2K sh | Q1 2026 | |
| 23 | HUB Investment Partners, LLC | $48K | 14K | —Held | Q1 2026 | |
| 24 | INTECH INVESTMENT MANAGEMENT LLC | $41K | 12K | ▼−39% Reduced · −7K sh | Q1 2026 | |
| 25 | Police & Firemen's Retirement System of New Jersey | $35K | 10K | —Held | Q1 2026 |
Holders and values reflect the 13F filers Arkolith currently tracks, not the entire institutional universe. Counts and totals are a floor, not the full institutional ownership.
| Date | Insider | Role | Action | Shares | Value |
|---|---|---|---|---|---|
| May 12, 2026 | Meadows Benjamin | Chief Commercial Officer | Buy (P) | 4K | $10K |
| Mar 15, 2026 | Sriram Vandana | Chief Financial Officer | Option exercise (M) | 263 | — |
| Mar 15, 2026 | Sriram Vandana | Chief Financial Officer | Tax withholding (F) | 93 | $439 |
| Mar 15, 2026 | Sriram Vandana | Chief Financial Officer | Option exercise (M) | 514 | — |
| Mar 15, 2026 | Sriram Vandana | Chief Financial Officer | Tax withholding (F) | 181 | $854 |
| Mar 15, 2026 | Sriram Vandana | Chief Financial Officer | Option exercise (M) | 1K | — |
| Mar 15, 2026 | Sriram Vandana | Chief Financial Officer | Tax withholding (F) | 371 | $2K |
| Mar 15, 2026 | Sriram Vandana | Chief Financial Officer | Option exercise (M) | 1K | $0 |
| Mar 15, 2026 | Miller Michael Francis | Chief Operating Officer | Tax withholding (F) | 48 | $227 |
| Mar 15, 2026 | Miller Michael Francis | Chief Operating Officer | Option exercise (M) | 81 | — |
| Mar 15, 2026 | Miller Michael Francis | Chief Operating Officer | Tax withholding (F) | 29 | $137 |
| Mar 15, 2026 | Miller Michael Francis | Chief Operating Officer | Option exercise (M) | 834 | — |
| Company | Co-held by | Combined value |
|---|---|---|
| MICROSOFT CORPMSFT | 33 funds | $12.3B |
| META PLATFORMS INC-CLASS AMETA | 32 funds | $7.6B |
| ALPHABET INC-CL CGOOG | 32 funds | $6.7B |
| UNITEDHEALTH GROUP INCUNH | 32 funds | $1.6B |
| AMAZON.COM INCAMZN | 31 funds | $9.7B |
| ALPHABET INC-CL AGOOGL | 31 funds | $8.2B |
| ELI LILLY & COLLY | 31 funds | $3.2B |
| COSTCO WHOLESALE CORPCOST | 31 funds | $2.9B |
| ORACLE CORPORCL | 31 funds | $2.6B |
| VISA INC-CLASS A SHARESV | 31 funds | $2.6B |
| MASTERCARD INC - AMA | 31 funds | $2.1B |
| SALESFORCE INCCRM | 31 funds | $2.1B |
Ranked by how many of QTRX's institutional holders also hold each name, a cross-fund conviction signal. Via the MCP server (ticker.co_held).
13F holdings + Form 4 insider transactions + end-of-day price history + the live filing stream, joined for QTRX. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes. Every panel above is one call to the Arkolith API & MCP server.