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/SION/capital-change-brief"
Use Arkolith's capital_change_brief for SION. Tell me what changed, whether insider activity corroborates it, and cite the SEC evidence.
| # | Fund | Position value | Shares | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | RA CAPITAL MANAGEMENT, L.P. | $397.1M | 9.9M | —Held | Q1 2026 | |
| 2 | TPG GP A, LLC | $260.4M | 6.5M | ▼−3.7% Reduced · −250K sh | Q1 2026 | |
| 3 | ORBIMED ADVISORS LLC | $141.5M | 3.5M | ▼−0.9% Reduced · −31K sh | Q1 2026 | |
| 4 | VIKING GLOBAL INVESTORS LP | $128.1M | 3.2M | —Held | Q1 2026 | |
| 5 | Enavate Sciences GP, LLC | $99.3M | 2.5M | —Held | Q1 2026 | |
| 6 | JPMORGAN CHASE & CO | $53.7M | 1.5M | ▲+19% Added · +233K sh | Q1 2026 | |
| 7 | JENNISON ASSOCIATES LLC | $58.2M | 1.5M | ▲+30% Added · +336K sh | Q1 2026 | |
| 8 | BlackRock, Inc. | $52.0M | 1.3M | ▲+0.3% Added · +4K sh | Q1 2026 | |
| 9 | CITADEL ADVISORS LLC | $46.8M | 1.2M | ▲+7.3% Added · +80K sh | Q1 2026 | |
| 10 | VANGUARD CAPITAL MANAGEMENT LLC | $41.3M | 1.0M | ▲New +1.0M sh | Q1 2026 | |
| 11 | DEERFIELD MANAGEMENT COMPANY, L.P. | $38.9M | 971K | —Held | Q1 2026 | |
| 12 | PRICE T ROWE ASSOCIATES INC /MD/ | $30.3M | 756K | ▼−9.0% Reduced · −75K sh | Q1 2026 | |
| 13 | STATE STREET CORP | $30.3M | 756K | ▲+9.1% Added · +63K sh | Q1 2026 | |
| 14 | PERCEPTIVE ADVISORS LLC | $26.4M | 658K | ▼−44% Reduced · −521K sh | Q1 2026 | |
| 15 | EVENTIDE ASSET MANAGEMENT, LLC | $25.9M | 646K | ▲+1.0% Added · +6K sh | Q1 2026 | |
| 16 | Aberdeen Group plc | $22.6M | 564K | ▼−33% Reduced · −276K sh | Q1 2026 | |
| 17 | BAKER BROS. ADVISORS LP | $16.0M | 400K | —Held | Q1 2026 | |
| 18 | GEODE CAPITAL MANAGEMENT, LLC | $15.6M | 390K | ▲+2.6% Added · +10K sh | Q1 2026 | |
| 19 | Siren, L.L.C. | $12.0M | 300K | —Held | Q1 2026 | |
| 20 | Soleus Capital Management, L.P. | $11.8M | 294K | ▲+9.3% Added · +25K sh | Q1 2026 | |
| 21 | GOLDMAN SACHS GROUP INC | $10.6M | 263K | ▲+626% Added · +227K sh | Q1 2026 | |
| 22 | Ensign Peak Advisors, Inc | $10.2M | 256K | ▲+220% Added · +176K sh | Q1 2026 | |
| 23 | Candriam S.C.A. | $9.5M | 237K | ▲New +237K sh | Q1 2026 | |
| 24 | Kalehua Capital Management LLC | $7.9M | 197K | —Held | Q1 2026 | |
| 25 | FRANKLIN RESOURCES INC | $7.0M | 175K | —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 |
|---|---|---|---|---|---|
| Jul 7, 2026 | ORBIMED ADVISORS LLC | Director | Sell (S) | 86K | $3.9M |
| Jul 7, 2026 | Thompson Peter A. | Director | Sell (S) | 86K | $3.9M |
| Jul 6, 2026 | Fitzpatrick Jennifer | Chief Legal Officer | Option exercise (M) | 10K | $63K |
| Jul 6, 2026 | Fitzpatrick Jennifer | Chief Legal Officer | Sell (S) | 10K | $447K |
| Jul 6, 2026 | Fitzpatrick Jennifer | Chief Legal Officer | Option exercise (M) | 10K | $0 |
| Jun 30, 2026 | Thompson Peter A. | Director | Sell (S) | 116K | $5.3M |
| Jun 30, 2026 | ORBIMED ADVISORS LLC | Director | Sell (S) | 116K | $5.3M |
| Jun 17, 2026 | Booth Bruce | Director | Grant (A) | 17K | $0 |
| Jun 17, 2026 | Ruddy Marcella K. | Director | Grant (A) | 17K | $0 |
| Jun 17, 2026 | Resnick Joshua | Director | Grant (A) | 17K | $0 |
| Jun 17, 2026 | Fleming Harold Edward | Director | Grant (A) | 17K | $0 |
| Jun 17, 2026 | Clancy Paul J | Director | Grant (A) | 17K | $0 |
| Company | Co-held by | Combined value |
|---|---|---|
| BOSTON SCIENTIFIC CORPBSX | 34 funds | $1.5B |
| INTUITIVE SURGICAL INCISRG | 33 funds | $2.6B |
| PRAXIS PRECISION MEDICINES IPRAX | 32 funds | $2.0B |
| OLEMA PHARMACEUTICALS INCOLMA | 32 funds | $149.9M |
| ELI LILLY & COLLY | 31 funds | $5.3B |
| REVOLUTION MEDICINES INCRVMD | 31 funds | $1.9B |
| CELCUITY INCCELC | 31 funds | $1.8B |
| COGENT BIOSCIENCES INCCOGT | 31 funds | $703.4M |
| EDWARDS LIFESCIENCES CORPEW | 31 funds | $681.7M |
| MIRUM PHARMACEUTICALS INCMIRM | 31 funds | $527.7M |
| BIOCRYST PHARMACEUTICALS INCBCRX | 31 funds | $425.6M |
| DEXCOM INCDXCM | 31 funds | $334.7M |
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).
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.