| # | Fund | Position value | Shares | Last move | As of |
|---|---|---|---|---|---|
| 1 | RA CAPITAL MANAGEMENT, L.P. | $397.1M | 9.91M | Held | Q1 2026 |
| 2 | TPG GP A, LLC | $260.4M | 6.49M | Reduced | Q1 2026 |
| 3 | ORBIMED ADVISORS LLC | $141.5M | 3.53M | Reduced | Q1 2026 |
| 4 | VIKING GLOBAL INVESTORS LP | $128.1M | 3.20M | Held | Q1 2026 |
| 5 | VANGUARD CAPITAL MANAGEMENT LLC | $41.3M | 1.03M | New | Q1 2026 |
| 6 | DEERFIELD MANAGEMENT COMPANY, L.P. | $38.9M | 970.6K | Held | Q1 2026 |
| 7 | STATE STREET CORP | $30.3M | 756.2K | Added | Q1 2026 |
| 8 | PERCEPTIVE ADVISORS LLC | $26.4M | 658.4K | New | Q1 2026 |
| 9 | EVENTIDE ASSET MANAGEMENT, LLC | $25.9M | 645.5K | Added | Q1 2026 |
| 10 | BAKER BROS. ADVISORS LP | $16.0M | 400.0K | Held | Q1 2026 |
| 11 | Siren, L.L.C. | $12.0M | 300.0K | Held | Q1 2026 |
| 12 | Soleus Capital Management, L.P. | $11.8M | 293.5K | Added | Q1 2026 |
| 13 | Ensign Peak Advisors, Inc | $10.2M | 255.6K | Added | Q1 2026 |
| 14 | Candriam S.C.A. | $9.5M | 236.8K | New | Q1 2026 |
| 15 | VANGUARD PORTFOLIO MANAGEMENT LLC | $5.7M | 142.1K | New | Q1 2026 |
| 16 | Point72 Asset Management, L.P. | $5.5M | 136.5K | New | Q1 2026 |
| 17 | Alyeska Investment Group, L.P. | $5.5M | 136.2K | Held | Q1 2026 |
| 18 | VANGUARD FIDUCIARY TRUST CO | $4.5M | 112.2K | New | Q1 2026 |
| 19 | Rock Springs Capital Management LP | $4.0M | 99.4K | Held | Q1 2026 |
| 20 | Integral Health Asset Management, LLC | $2.0M | 50.0K | New | Q1 2026 |
| 21 | ALPS ADVISORS INC | $1.5M | 36.6K | Reduced | Q1 2026 |
| 22 | CITADEL ADVISORS LLC | $1.1M | 27.1K | Reduced | Q1 2026 |
| 23 | POLEN CAPITAL MANAGEMENT LLC | $1.1M | 26.8K | Reduced | Q1 2026 |
| 24 | Rafferty Asset Management, LLC | $887K | 22.1K | Reduced | Q1 2026 |
| 25 | Walleye Capital LLC | $605K | 15.1K | New | Q1 2026 |
No Form 4 insider transactions on file yet.
| Company | Co-held by | Combined value |
|---|---|---|
| Intuitive Surgical IncISRG | 34 funds | $9.9B |
| Boston Scientific CorpBSX | 33 funds | $5.8B |
| Eli Lilly & CoLLY | 32 funds | $38.1B |
| Edwards Lifesciences CorpEW | 32 funds | $2.8B |
| Revolution Medicines, Inc.RVMD | 32 funds | $2.3B |
| Praxis Precision Medicines, Inc.PRAX | 32 funds | $2.2B |
| Celcuity Inc.CELC | 32 funds | $1.9B |
| Cogent Biosciences IncCOGT | 32 funds | $921.2M |
| Olema Pharmaceuticals IncOLMA | 32 funds | $208.7M |
| Thermo Fisher Scientific IncTMO | 31 funds | $10.8B |
| Rhythm Pharmaceuticals, Inc.RYTM | 31 funds | $1.9B |
| Edgewise Therapeutics, Inc.EWTX | 31 funds | $1.5B |
Ranked by how many of SION's institutional holders also hold each name — a cross-fund conviction signal. Via the MCP server (ticker.co_held).
No filings captured for this ticker in the live stream yet.
13F holdings + Form 4 insider transactions + end-of-day price history + the live filing stream, joined for SION. 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.