55 tracked 13F filers disclose a position in QTTB as of the latest SEC 13F filings, a combined $74.3M in reported value. 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.
| # | Fund | Position value | Shares | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | Atlas Venture Life Science Advisors, LLC | $34.6M | 2.7M | ▲+30% Added · +625K sh | Q3 2026 | |
| 2 | ORBIMED ADVISORS LLC | $14.5M | 2.3M | —Held | Q1 2026 | |
| 3 | Opaleye Management Inc. | $8.1M | 1.3M | ▲+489% Added · +1.0M sh | Q1 2026 | |
| 4 | VANGUARD CAPITAL MANAGEMENT LLC | $2.0M | 306K | →First observed position No prior filed position | Q1 2026 | |
| 5 | PFIZER INC | $550K | 278K | —Held | Q3 2025 | |
| 6 | Sanofi | $3.1M | 244K | —Held | Q2 2026 | |
| 7 | ACORN CAPITAL ADVISORS, LLC | $2.8M | 216K | ▼−31% Reduced · −99K sh | Q2 2026 | |
| 8 | RENAISSANCE TECHNOLOGIES LLC | $1.3M | 207K | ▲+108% Added · +107K sh | Q1 2026 | |
| 9 | MONIMUS CAPITAL MANAGEMENT, LP | $862K | 134K | ▲New +134K sh | Q1 2026 | |
| 10 | GEODE CAPITAL MANAGEMENT, LLC | $1.6M | 123K | ▲+3.8% Added · +5K sh | Q2 2026 | |
| 11 | BlackRock, Inc. | $553K | 86K | ▲+44% Added · +26K sh | Q1 2026 | |
| 12 | JANE STREET GROUP, LLC | $421K | 66K | ▲+159% Added · +40K sh | Q1 2026 | |
| 13 | MARSHALL WACE, LLP | $337K | 52K | ▲New +52K sh | Q1 2026 | |
| 14 | STATE STREET CORP | $665K | 52K | ▲+26% Added · +11K sh | Q2 2026 | |
| 15 | VANGUARD FIDUCIARY TRUST CO | $321K | 50K | →First observed position No prior filed position | Q1 2026 | |
| 16 | TWO SIGMA INVESTMENTS, LP | $272K | 42K | ▼−9.6% Reduced · −4K sh | Q1 2026 | |
| 17 | Quadrature Capital Ltd | $464K | 36K | ▲New +36K sh | Q2 2026 | |
| 18 | ADAR1 Capital Management, LLC | $225K | 35K | ▲+75% Added · +15K sh | Q1 2026 | |
| 19 | Knott David M Jr | $387K | 30K | ▲New +30K sh | Q2 2026 | |
| 20 | Affinity Asset Advisors, LLC | $178K | 28K | —Held | Q1 2026 | |
| 21 | NORTHERN TRUST CORP | $161K | 25K | —Held | Q1 2026 | |
| 22 | MANGROVE PARTNERS IM, LLC | $282K | 22K | ▲New +22K sh | Q2 2026 | |
| 23 | Cetera Investment Advisers | $133K | 21K | ▲New +21K sh | Q1 2026 | |
| 24 | AMERICAN CENTURY COMPANIES INC | $121K | 19K | ▲New +19K sh | Q1 2026 | |
| 25 | CITADEL ADVISORS LLC | $99K | 15K | ▼−66% Reduced · −30K sh | 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.
Last quarter, 11 funds opened a new position in QTTB and 5 added to an existing one, while 5 reduced and 0 exited entirely — based on 13F filings from active, signal-eligible managers (passive index funds and other mechanical holders are excluded from this count).
| Company | Co-held by | Combined value |
|---|---|---|
| BRISTOL-MYERS SQUIBB COBMY | 22 funds | $1.6B |
| ELI LILLY & COLLY | 21 funds | $4.3B |
| UNITEDHEALTH GROUP INCUNH | 21 funds | $2.8B |
| BOSTON SCIENTIFIC CORPBSX | 21 funds | $1.9B |
| NVIDIA CORPNVDA | 20 funds | $28.1B |
| AMAZON.COM INCAMZN | 20 funds | $14.8B |
| MICROSOFT CORPMSFT | 20 funds | $14.7B |
| DANAHER CORPDHR | 20 funds | $1.2B |
| INSMED INCINSM | 20 funds | $817.4M |
| BRIDGEBIO PHARMA INCBBIO | 20 funds | $715.7M |
| MCKESSON CORPMCK | 20 funds | $649.0M |
| REVOLUTION MEDICINES INCRVMD | 20 funds | $322.4M |
Ranked by how many of QTTB's institutional holders also hold each name, a cross-fund conviction signal.
| Date | Insider | Role | Action | Shares | Value |
|---|---|---|---|---|---|
| Aug 25, 2026 | Violette Shelia M. | Chief Scientific Officer | Sell (S) | 3K | $46K |
| Aug 25, 2026 | Morrison Jodie Pope | CEO, Director | Sell (S) | 10K | $163K |
| Aug 25, 2026 | Kalowski Lee | CFO and President | Sell (S) | 4K | $66K |
| May 28, 2026 | Xu Diyong | Director, 10% Owner | Buy (P) | 1.3M | $10.0M |
| May 28, 2026 | Xu Diyong | Director, 10% Owner | Buy (P) | 625K | $5.0M |
| May 28, 2026 | ORBIMED ADVISORS LLC | Director, 10% Owner | Buy (P) | 1.3M | $10.0M |
| May 28, 2026 | ORBIMED ADVISORS LLC | Director, 10% Owner | Buy (P) | 625K | $5.0M |
| Feb 25, 2026 | Violette Shelia M. | Chief Scientific Officer | Sell (S) | 3K | $13K |
| Feb 25, 2026 | Morrison Jodie Pope | CEO, Director | Sell (S) | 10K | $45K |
| Feb 25, 2026 | Kalowski Lee | CFO and President | Sell (S) | 4K | $18K |
| Dec 2, 2025 | Kalowski Lee | CFO and President | Sell (S) | 9K | $31K |
| Dec 2, 2025 | Morrison Jodie Pope | CEO, Director | Sell (S) | 23K | $78K |
Connected entities for QTTB
This stock page is the public Follow view. For one current, evidence-backed answer, use capital_change_brief through REST or MCP. It compares tracked 13F changes with qualifying Form 4 activity and cites the SEC evidence.
curl -H "Authorization: Bearer YOUR_API_KEY" \ "https://arkolith.com/api/v1/stocks/QTTB/capital-change-brief"
Use Arkolith's capital_change_brief for QTTB. Tell me what changed, whether insider activity corroborates it, and cite the SEC evidence.
13F holdings + Form 4 insider transactions + end-of-day price history + the live filing stream, joined for QTTB. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes.